WO2022041919A1 - Method, apparatus, and device for controlling photovoltaic device, and photovoltaic system - Google Patents
Method, apparatus, and device for controlling photovoltaic device, and photovoltaic system Download PDFInfo
- Publication number
- WO2022041919A1 WO2022041919A1 PCT/CN2021/098920 CN2021098920W WO2022041919A1 WO 2022041919 A1 WO2022041919 A1 WO 2022041919A1 CN 2021098920 W CN2021098920 W CN 2021098920W WO 2022041919 A1 WO2022041919 A1 WO 2022041919A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grid
- photovoltaic
- frequency
- equipment
- electrical equipment
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Definitions
- the present disclosure relates to the technical field of power generation equipment, and in particular, to a photovoltaic equipment control method, device, equipment, and photovoltaic system.
- a photovoltaic device control method comprising the following steps:
- the working state includes a running state and a non-running state
- the photovoltaic equipment is controlled to stop feeding power to the AC grid; both the electrical equipment and the AC grid are connected to the photovoltaic equipment ;
- the photovoltaic equipment is controlled to reduce power generation.
- the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold; the when the grid frequency is greater than the preset frequency threshold, and when the electrical equipment is in the running state, controlling the photovoltaic equipment to stop feeding power to the AC power grid, including:
- the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
- controlling the photovoltaic device to stop feeding power to the AC grid includes:
- the photovoltaic equipment is controlled to stop.
- the method when the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, after controlling the photovoltaic equipment to stop, the method further includes:
- the grid frequency of the AC grid connected to the acquired electrical device is returned.
- the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold; the when the grid frequency is greater than the preset frequency When the frequency threshold is set and the electrical equipment is not running, controlling the photovoltaic equipment to reduce the power generation, including:
- the photovoltaic equipment is controlled to reduce the generated power.
- controlling the photovoltaic equipment to reduce the power generation includes:
- the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
- the method further includes:
- a photovoltaic equipment control apparatus including:
- a working state obtaining module used for obtaining the working state of the electrical equipment;
- the working state includes a running state and a non-running state;
- the grid frequency acquisition module is used to acquire the grid frequency of the AC grid connected to the electrical equipment;
- a first control module configured to control the photovoltaic equipment to stop feeding power to the AC power grid when the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state; the electrical equipment and the AC The grid is connected to the photovoltaic equipment;
- a second control module configured to control the photovoltaic device to reduce power generation when the grid frequency is greater than the preset frequency threshold and the electrical device is in a non-operating state.
- a photovoltaic device control device including a control device, a sampling circuit and a detector, the sampling circuit is connected to an AC power grid, the detector is connected to the electrical equipment, the sampling circuit and The detectors are all connected to the control device, and the sampling circuit is used to collect the grid frequency of the AC power grid connected to the electrical equipment and send it to the control device. The detector is used to detect the working state of the electrical equipment and send it to the control device.
- a control device for controlling photovoltaic equipment according to the above method.
- a photovoltaic system including photovoltaic equipment, electrical equipment, an alternating current grid, and the above photovoltaic equipment control equipment, wherein the electrical equipment and the alternating current grid are both connected to the photovoltaic equipment, The electrical equipment is also connected to the AC power grid.
- the electrical device is an air conditioner.
- FIG. 1 is a flowchart of a method for controlling a photovoltaic device in some embodiments of the present disclosure
- FIG. 2 is a flowchart of a photovoltaic device control method in other embodiments of the present disclosure
- FIG. 3 is a block diagram of a system including an air conditioning system, an electrical device, and an AC power grid in some embodiments of the present disclosure
- FIG. 4 is a flowchart of a method for controlling a photovoltaic device according to further embodiments of the present disclosure.
- the present disclosure proposes a photovoltaic equipment control method, device, equipment and photovoltaic system.
- the photovoltaic equipment control method, device, equipment and photovoltaic system can reduce the impact of photovoltaic power generation on the power grid.
- a method for controlling photovoltaic equipment is provided.
- the method is implemented based on a system formed by electrical equipment, photovoltaic equipment, and an AC power grid.
- the electrical equipment is connected to the photovoltaic equipment, and the photovoltaic equipment can obtain the output generated by the photovoltaic equipment.
- the electrical energy is used for its own work, and the electrical equipment is also connected to the AC power grid, and can use the electrical energy from the AC power grid. and the AC grid to obtain electricity.
- Photovoltaic equipment is also connected to the AC power grid, and can transmit the generated electric energy to the AC power grid for power feeding.
- the photovoltaic equipment control method can be implemented by a control device, wherein the control device can be a device independent of the photovoltaic equipment, the electrical equipment and the AC grid, or the existing control in the photovoltaic equipment, the electrical equipment and the AC grid can be used. In order to save the cost of hardware, the device can be selected according to actual needs, as long as those skilled in the art can realize it.
- the type of electrical equipment is not unique.
- the electrical equipment is an air conditioner as an example.
- the air conditioner includes an air conditioner external unit and an air conditioner internal unit.
- the air conditioner can work with the electric energy provided by the photovoltaic equipment.
- the photovoltaic electric energy comes from the sun and does not pollute the environment. When the light is insufficient, the external air conditioner can also draw electricity from the power grid, which does not affect the normal use of the air conditioner.
- the photovoltaic equipment control method includes the following steps:
- Step S200 Acquire the working state of the electrical equipment.
- the working state includes a running state and a non-running state.
- the working state of the electrical equipment is detected first, which provides a basis for subsequently providing different control steps for different working states of the electrical equipment.
- the working state includes a running state and a non-working state.
- the working state may also include other states, such as a low-power running state and a high-power running state, and the subsequent control
- the process can refer to the control process of the similar working state. For example, when the electrical equipment is in a low-power operating state, the subsequent steps can be performed according to the situation that the electrical equipment is not operating, which can be adjusted according to actual needs.
- the method of acquiring the working state of the electrical equipment is not unique.
- a sensor may be used to detect the working parameters of the electrical equipment, the sensor is connected to the control device, and the sensor sends the detected parameter to the control device.
- the control device determines the working state of the electrical equipment according to the received parameters.
- the sensor can be used to detect the working parameters of the air conditioner, and the control device judges whether the compressor is running normally according to the working parameters detected by the sensor, thereby judging whether the air conditioner is running or not running.
- Step S400 Obtain the grid frequency of the AC grid to which the electrical device is connected.
- both the electrical equipment and the photovoltaic equipment are connected to the AC power grid, and the frequency fluctuation of the AC power grid will affect the working performance of the entire system.
- the way to obtain the grid frequency of the AC grid is not unique.
- the grid frequency of the AC grid can be sampled through a sampling circuit, the sampling circuit is connected to the control device, and the sampling circuit sends the collected grid frequency to the control device for subsequent processing.
- the sampling circuit can sample the grid frequency at preset time intervals and send it to the control device, simplifying the control process, and the sampling circuit can also sample the grid frequency in real time and send it to the control device to improve the effectiveness of grid frequency monitoring. .
- Step S600 when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a running state, control the photovoltaic equipment to stop feeding power to the AC grid.
- both the electrical equipment and the AC power grid are connected to photovoltaic equipment, and the photovoltaic equipment can not only supply power to the electrical equipment, but also feed the AC power grid.
- the control device judges that the grid frequency is greater than the preset frequency threshold, consider that the grid frequency is abnormal at this time, and carry out follow-up control combined with the working state of the electrical equipment to control the photovoltaic equipment to stop feeding power to the AC grid, reduce the power generation of the photovoltaic equipment, and avoid The excessive power generation of photovoltaic equipment aggravates the fluctuation of grid frequency.
- the photovoltaic equipment can be controlled to supply power to the electrical equipment, and the electrical equipment can be used normally. Further The power generation of photovoltaic equipment is less than the power consumption of electrical equipment, ensuring that the electricity generated by photovoltaic power generation is completely consumed by electrical equipment and cannot generate electricity to the grid. Scalable, on the basis of controlling the photovoltaic equipment to stop feeding power to the AC power grid, the photovoltaic equipment can also be controlled to stop generating electricity to the electrical equipment, further reducing the impact of the photovoltaic equipment power generation on the frequency fluctuation of the power grid.
- Step S800 When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operational state, control the photovoltaic equipment to reduce the generating power.
- controlling the photovoltaic equipment to reduce the power generation can be controlling the photovoltaic equipment to reduce the generating power to a certain value, or controlling the photovoltaic equipment to stop generating power, which can be adjusted according to actual needs.
- the photovoltaic equipment can not generate electricity to the electrical equipment.
- the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation.
- the grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
- the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold, see FIG. 2 , step S600 includes step S620 .
- Step S620 when the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a running state, control the photovoltaic equipment to stop feeding power to the AC grid.
- the number of preset frequency thresholds is not unique.
- the number of preset frequency thresholds is two, including a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold.
- Frequency threshold, the first frequency threshold and the second frequency threshold can divide the frequency into three intervals, and the obtained grid frequency is compared with the first frequency threshold and the second frequency threshold. According to the comparison result, it can be determined that the obtained frequency threshold is in the range. In which interval, different subsequent controls can be made on the frequency thresholds in different intervals, which improves the accuracy of the control.
- the values of the first frequency threshold and the second frequency threshold are not unique, and can be determined by those skilled in the art according to actual needs.
- the first frequency threshold may be 52 Hz
- the second frequency threshold may be 50.25 Hz Hz. It can be understood that in other disclosed embodiments, the first frequency threshold and the second frequency threshold may also be other values.
- the photovoltaic equipment when the obtained grid frequency is greater than 50.25 Hz and less than or equal to 52 Hz, it is considered that the grid frequency is high.
- the photovoltaic equipment can be controlled to stop feeding power to the AC grid to reduce the power generation of the photovoltaic equipment.
- the photovoltaic equipment can be controlled to Electrical equipment generates electricity, and electrical equipment can be used normally.
- the power generation of photovoltaic equipment is less than the power consumption of electrical equipment, ensuring that the electricity generated by photovoltaic power generation is completely consumed by electrical equipment and cannot generate electricity to the grid. In addition to reducing the impact of photovoltaic equipment power generation on the frequency of the power grid, it can also use electrical equipment to work and be reliable.
- step S600 includes step S640.
- Step S640 When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, control the photovoltaic equipment to stop.
- the grid frequency is considered to be too high.
- the photovoltaic equipment is controlled to stop at this time, so that the photovoltaic equipment neither feeds the AC power grid nor supplies power to the power grid.
- the electrical equipment generates electricity to improve the stability of the electrical equipment and the operation of the AC power grid.
- the photovoltaic device control method further includes step 660 .
- Step 660 Return to step S400 after the photovoltaic device is shut down for the preset protection period.
- a period of protection needs to pass. If the time is not reached, the shutdown state of the system will not be restored, so as to avoid frequent startup and shutdown of the equipment and excessive workload caused by operation, thereby improving the The working performance of photovoltaic equipment.
- the protection time has been met. At this time, the process returns to step S400, and the control device re-acquires the grid frequency of the AC grid connected to the electrical equipment, and executes the subsequent steps in sequence, that is, according to the obtained grid frequency The corresponding steps are performed according to the magnitude relationship of the preset frequency domain threshold in the frequency domain.
- the photovoltaic equipment After the photovoltaic equipment is shut down for the preset protection period, return to step S400, and return to the previous steps to continuously obtain the grid frequency, and perform corresponding steps according to the relationship between the obtained grid frequency and the preset frequency threshold, so as to realize continuous monitoring of the grid frequency , after the photovoltaic equipment stops for a preset protection period and then returns to the previous steps, it can avoid frequent starting and stopping of the equipment and excessive workload caused by working, which is beneficial to improve the working performance of the photovoltaic equipment and the equipment connected to it.
- the specific duration of the preset protection period is not unique. It can be set according to the standard in the national standard GB/T 37408. Generally speaking, the preset protection period can take a value within 60s-300s, and it is not less than 60s. Affect the normal use of photovoltaic equipment.
- the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold, see FIG. 2 , step S800 includes step S820 .
- Step S820 when the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a non-operational state, control the photovoltaic equipment to reduce the generated power.
- the number of preset frequency thresholds is not unique.
- the number of preset frequency thresholds is two, including a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold.
- Frequency threshold, the first frequency threshold and the second frequency threshold can divide the frequency into three intervals, and the obtained grid frequency is compared with the first frequency threshold and the second frequency threshold. According to the comparison result, it can be determined that the obtained frequency threshold is in the range. In which interval, different subsequent controls can be made on the frequency thresholds in different intervals, which improves the accuracy of the control.
- the values of the first frequency threshold and the second frequency threshold are not unique, and can be determined by those skilled in the art according to actual needs.
- the first frequency threshold may be 52 Hz
- the second frequency threshold may be 50.25 Hz Hz. It can be understood that, in other embodiments of the present disclosure, the first frequency threshold and the second frequency threshold may also be other values.
- the photovoltaic equipment is controlled to reduce the generating power, and the photovoltaic equipment enters the generating power limit state.
- the power feeds the AC power grid, and the power generation is controlled according to the frequency of the power grid. While the power generation of the photovoltaic equipment is reasonably utilized, the influence of the excessive power generation of the photovoltaic equipment on the frequency fluctuation of the power grid is reduced.
- step S800 includes step S840.
- Step S840 When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a non-operating state, control the photovoltaic equipment to stop feeding power to the AC grid.
- the first frequency threshold as 52 Hz and the second frequency threshold as 50.25 Hz as an example
- the photovoltaic equipment is equivalent to stopping power supply to the electrical equipment.
- the photovoltaic equipment is controlled to stop feeding the AC grid, so that the photovoltaic equipment neither feeds the AC grid nor Do not generate electricity to electrical equipment to improve the stability of electrical equipment and AC grid operation.
- the photovoltaic device control method further includes step 860 .
- Step 860 Return to step S400 after the photovoltaic device stops feeding the AC power grid for the preset protection period.
- a protection period of a certain period of time is required. If the time is not reached, the shutdown state of the system will not be restored, which can avoid frequent startup and shutdown of the device and workload caused by work. is too large, thereby improving the working performance of photovoltaic equipment.
- step S400 After the photovoltaic equipment stops feeding power to the AC power grid for the preset protection period, the protection time has been met, and then returns to step S400, and the control device re-acquires the power grid frequency of the AC power grid to which the electrical equipment is connected, and executes the subsequent steps in sequence, namely, Corresponding steps are performed according to the acquired magnitude relationship of the preset frequency thresholds in the frequency domain of the power grid.
- step S400 after the photovoltaic equipment stops feeding power to the AC power grid for the preset protection period.
- the grid frequency can be continuously obtained, and corresponding steps are performed according to the relationship between the obtained grid frequency and the preset frequency threshold, so as to realize the control of the grid frequency.
- the continuous monitoring of the grid frequency can also prevent the equipment from starting and stopping frequently and the work load is too large, which is beneficial to improve the working performance of the photovoltaic equipment and the equipment connected to it.
- the specific duration of the preset protection period is not unique. It can be set according to the standard in the national standard GB/T 37408. Generally speaking, the preset protection period can take a value within 60s-300s, and it is not less than 60s. Affect the normal use of photovoltaic equipment.
- the photovoltaic device control method further includes step 500 .
- step 500 may be performed simultaneously with step S600 or step S800.
- Step 500 When the grid frequency is greater than the preset frequency threshold, record the abnormal state of the grid frequency.
- the abnormal state of the power grid frequency can be recorded by setting the flag bit, and the abnormal state of the power grid frequency can be cleared by setting the flag position to 1, and correspondingly, when the power grid frequency is less than the preset frequency threshold, the abnormal state can be cleared. Record, specifically set the flag position to 0 to indicate that the grid frequency is normal.
- the number of flag bits may be two, including the over-under-frequency protection flag bit and the anti-feeding network flag bit,
- the anti-feeding network flag is set to 1; when the obtained grid frequency is less than or equal to the second frequency threshold, the anti-feeding network flag is reset to 0; when the obtained grid frequency is greater than
- the over-under-frequency protection flag is set to 1, and when the obtained grid frequency is less than or equal to the first frequency threshold, the over-under-frequency protection flag is reset to 0.
- a flag bit is set in the memory of the control device.
- the corresponding flag bit is set, and during subsequent processing, the abnormal state of the grid frequency can be quickly obtained according to the status of the flag bit, which is convenient to use.
- the number of flag bits is not unique, and can be adjusted according to the number of preset frequency thresholds or according to actual needs.
- the above photovoltaic equipment control method first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment.
- the photovoltaic equipment is controlled. Stop feeding power to the AC grid.
- the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment.
- a method for controlling photovoltaic equipment is provided.
- the electrical equipment is an air conditioning system
- the power generation power limitation of photovoltaic equipment is performed by collecting the frequency on the grid side and determining the working state of the current air conditioning system. control.
- FIG. 3 is a block diagram of a system including an air-conditioning system, electrical equipment and an AC power grid in some embodiments of the present disclosure.
- the photovoltaic equipment is connected to the DC/DC circuit to the DC bus part, the air conditioner internal unit draws power from the DC bus, when the air conditioning system does not start, or when the photovoltaic power generation is greater than the power consumption of the air conditioning system, the photovoltaic energy will be The energy is transferred to the power grid through the bidirectional AC/DC circuit part, and the external unit of the air conditioner takes power from the photovoltaic side preferentially.
- the first frequency threshold is the grid frequency limit 1
- the second frequency threshold is the grid frequency limit 2
- the grid frequency limit 1 refers to the grid frequency collected by the photovoltaic air conditioning system reaching a certain limit
- the grid frequency limit 2 refers to the photovoltaic air conditioner
- the grid frequency collected by the system reaches a certain limit
- the grid frequency limit 2 is less than the grid frequency limit 1
- the photovoltaic power generation limit refers to the reduction or reduction of photovoltaic power generation in a certain relationship according to the grid frequency.
- the photovoltaic device control method when executed, it is first detected whether the air conditioning part is running.
- the air conditioning part When the air conditioning part is running, the system detects that the grid frequency increases to a certain limit, for example When it is detected that the grid frequency is 52Hz, the system over-under-frequency protection flag is set, the system reports over-under-frequency protection, and both the photovoltaic part and the air conditioner part are shut down. At this time, the air conditioner cannot be used, and the photovoltaic cannot generate electricity to the grid.
- the over-under-frequency protection flag is 1, a certain protection period needs to pass. If the time is not reached, the system shutdown state will not recover.
- the system will re-detect whether the grid frequency exceeds 52Hz. If it exceeds 52Hz, the system will continue to report the over-under-frequency fault and continue to stop. If it does not exceed 52Hz, the system over-under-frequency protection flag will be reset.
- the grid frequency is greater than the frequency limit 2, for example, when the frequency limit 2 is 50.25Hz, the position of the system anti-feeding network flag is set, the air conditioner part is in normal use, and the photovoltaic power generation part is less than the power consumption of the air conditioner to ensure that the photovoltaic power generation is completely consumed by the air conditioner , unable to generate electricity to the grid.
- the air conditioner is in normal use at this time, and the photovoltaic power generation is not restricted, and can generate electricity to the grid at the maximum power.
- the system when the air conditioning part is not running, the system is in a pure photovoltaic power generation state, and when the system detects that the grid frequency increases to a certain limit, for example, when the grid frequency is detected to be 52 Hz, the system is over-frequency and under-frequency
- the protection flag when the protection flag is set, the system reports under-frequency protection, the photovoltaic part is disconnected, and the photovoltaic cannot generate electricity to the grid.
- the over-under-frequency protection flag is 1, a certain protection period needs to pass. If the time is not reached, the system shutdown state will not recover. If the protection time has been met, the system will re-detect whether the grid frequency exceeds 52Hz.
- the system will continue to report the over-under-frequency fault and continue to stop. If it does not exceed 52Hz, the system over-under-frequency protection flag will be reset.
- the grid frequency is greater than the frequency limit 2, for example, when the frequency limit 2 is 50.25Hz, the system enters the power generation limit state. At this time, the power generation power is controlled according to the size of the grid frequency. When the grid frequency returns to within 50.25Hz When the power grid is considered stable, the system will no longer limit the power generation of the photovoltaic air conditioning system.
- the above photovoltaic equipment control method first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment.
- the photovoltaic equipment is controlled. Stop feeding power to the AC grid.
- the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment.
- a photovoltaic equipment control device including a working state acquisition module, a grid frequency acquisition module, a first control module, and a second control module, where the working state acquisition module is used to obtain the working state of electrical equipment , the working state includes an operating state and a non-operating state, the grid frequency acquisition module is used to acquire the grid frequency of the AC grid connected to the electrical equipment, and the first control module is used when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in In the running state, the photovoltaic equipment is controlled to stop feeding power to the AC power grid, and both the electrical equipment and the AC power grid are connected to the photovoltaic equipment. Control photovoltaic equipment to reduce power generation.
- the photovoltaic device control apparatus further includes a recording module, the recording module is configured to, after the grid frequency acquisition module acquires the grid frequency of the AC grid connected to the electrical equipment, when the grid frequency is greater than a preset frequency threshold, Record the abnormal state of grid frequency.
- the above photovoltaic equipment control device first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment.
- the photovoltaic equipment is controlled. Stop feeding power to the AC grid.
- the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment.
- a photovoltaic device control device including a control device, a sampling circuit and a detector, the sampling circuit is connected to an AC power grid, the detector is connected to electrical equipment, the sampling circuit and the detector are both connected to the control device, and the sampling circuit is connected to the control device.
- the circuit is used to collect the grid frequency of the AC power grid connected to the electrical equipment and send it to the control device, the detector is used to detect the working state of the electrical equipment and send it to the control device, and the control device is used to control the photovoltaic equipment according to the above method.
- the above photovoltaic equipment control equipment first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment.
- the photovoltaic equipment is controlled. Stop feeding power to the AC grid.
- the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment.
- a photovoltaic system including photovoltaic equipment, electrical equipment, an AC power grid, and the above photovoltaic equipment control equipment, the electrical equipment and the AC power grid are both connected to the photovoltaic equipment, and the electrical equipment is also connected to the AC grid.
- the photovoltaic equipment control equipment can be independent of the photovoltaic equipment, electrical equipment, and AC power grid, or can add corresponding functions to the existing controllers in the photovoltaic equipment, electrical equipment, and AC power grid to act as photovoltaic equipment.
- Device control device usage can be independent of the photovoltaic equipment, electrical equipment, and AC power grid, or can add corresponding functions to the existing controllers in the photovoltaic equipment, electrical equipment, and AC power grid to act as photovoltaic equipment.
- the electrical device is an air conditioner.
- Photovoltaic equipment provides photovoltaic energy for the air-conditioning system.
- the photovoltaic equipment is connected to the DC/DC circuit to the DC bus, and the internal unit of the air conditioner draws power from the DC bus.
- the photovoltaic When the air-conditioning system does not start, or when the photovoltaic power generation is greater than the power consumption of the air-conditioning system, the photovoltaic The energy will be transferred to the power grid through the bidirectional AC/DC circuit part, and the external unit of the air conditioner will take power from the photovoltaic side preferentially.
- the above photovoltaic system first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment.
- the photovoltaic equipment is controlled to stop sending to the grid.
- AC grid feeding when the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the generated power, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment.
- the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation.
- the grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Provided are a method, apparatus, and device for controlling a photovoltaic device, and a photovoltaic system. The method comprises: acquiring an operating state of an electrical device (S200); acquiring a grid frequency of an AC grid to which the electrical device is connected (S400); if the grid frequency is greater than a preset frequency threshold and if the electrical device is in operation, controlling a photovoltaic device to stop feeding electricity to the AC grid (S600); and if the grid frequency is greater than the preset frequency threshold and if the electrical device is not in operation, controlling the photovoltaic device to reduce a generated power (S800). The method uses the operating state of the electrical device to control the photovoltaic device, thereby allowing energy provided by the photovoltaic device to the electrical device to be appropriately used, and preventing inefficient use of the generated photovoltaic power. When the grid frequency is detected to be greater than the preset frequency threshold, the photovoltaic device stops feeding electricity to the AC grid or reduces the generated power, so as to mitigate the impact of photovoltaic power generation on grid stability, thereby improving operational reliability.
Description
相关公开的交叉引用Cross References to Relevant Publications
本公开是以CN公开号为202010870647.5,公开日为2020年8月26日的公开为基础,并主张其优先权,该CN公开的公开内容在此作为整体引入本公开中。The present disclosure is based on and claims the priority of the CN publication number 202010870647.5 and the publication date is August 26, 2020, and the disclosure content of the CN publication is hereby incorporated into the present disclosure as a whole.
本公开涉及发电设备技术领域,特别是涉及一种光伏设备控制方法、装置、设备及光伏***。The present disclosure relates to the technical field of power generation equipment, and in particular, to a photovoltaic equipment control method, device, equipment, and photovoltaic system.
随着用电设备种类和数量的增加,近年来世界各国都开始广泛应用光伏发电来缓解电网压力,各种分布式发电与微网***以其清洁、环保、灵活、分散、高效等特点成为当前研究的重点。用电设备中所使用到的光伏电能来自于太阳且对环境没有任何的污染,在光照不足的时候,用电设备同样可以在电网取电,不影响用电设备的正常使用。With the increase in the types and quantity of electrical equipment, in recent years, countries around the world have begun to widely use photovoltaic power generation to relieve grid pressure. Various distributed power generation and micro-grid systems have become the current The focus of the research. The photovoltaic power used in the electrical equipment comes from the sun and does not pollute the environment. When the light is insufficient, the electrical equipment can also draw electricity from the power grid, which does not affect the normal use of the electrical equipment.
然而,由于光伏发电具有随机波动性,当光伏设备、用电设备和电网连接到一起时,在电网频率波动的时候,由于光伏设备的数量和规模加大,光伏设备会加大对电网稳定性的影响,从而影响到用电设备的使用,传统的光伏设备工作性能不佳。However, due to the random fluctuation of photovoltaic power generation, when photovoltaic equipment, electrical equipment and the grid are connected together, when the frequency of the grid fluctuates, due to the increase in the number and scale of photovoltaic equipment, photovoltaic equipment will increase the stability of the grid. Therefore, the use of electrical equipment is affected, and the performance of traditional photovoltaic equipment is not good.
发明内容SUMMARY OF THE INVENTION
根据本公开的一个方面,提供一种光伏设备控制方法,包括以下步骤:According to an aspect of the present disclosure, there is provided a photovoltaic device control method, comprising the following steps:
获取用电设备的工作状态;所述工作状态包括运行状态和未运行状态;Obtain the working state of the electrical equipment; the working state includes a running state and a non-running state;
获取用电设备接入的交流电网的电网频率;Obtain the grid frequency of the AC grid connected to the electrical equipment;
当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电;所述用电设备和所述交流电网均连接所述光伏设备;When the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop feeding power to the AC grid; both the electrical equipment and the AC grid are connected to the photovoltaic equipment ;
当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率。When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to reduce power generation.
在本公开一些实施例中,所述预设频率阈值包括第一频率阈值和第二频率阈值,所述第二频率阈值小于所述第一频率阈值;所述当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电,包括:In some embodiments of the present disclosure, the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold; the when the grid frequency is greater than the preset frequency threshold, and when the electrical equipment is in the running state, controlling the photovoltaic equipment to stop feeding power to the AC power grid, including:
当所述电网频率大于所述第二频率阈值,小于或等于所述第一频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电。When the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
在本公开一些实施例中,所述当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电,包括:In some embodiments of the present disclosure, when the grid frequency is greater than a preset frequency threshold and the electrical device is in a running state, controlling the photovoltaic device to stop feeding power to the AC grid includes:
当所述电网频率大于所述第一频率阈值,且所述用电设备处于运行状态时,控制所述光伏设备停机。When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop.
在本公开一些实施例中,所述当所述电网频率大于所述第一频率阈值,且所述用电设备处于运行状态时,控制所述光伏设备停机之后,还包括:In some embodiments of the present disclosure, when the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, after controlling the photovoltaic equipment to stop, the method further includes:
在所述光伏设备停机持续预设保护期后,返回所述获取用电设备接入的交流电网的电网频率。After the photovoltaic device is shut down for a preset protection period, the grid frequency of the AC grid connected to the acquired electrical device is returned.
在本公开一些实施例中,所述预设频率阈值包括第一频率阈值和第二频率阈值,所述第二频率阈值小于所述第一频率阈值;所述当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率,包括:In some embodiments of the present disclosure, the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold; the when the grid frequency is greater than the preset frequency When the frequency threshold is set and the electrical equipment is not running, controlling the photovoltaic equipment to reduce the power generation, including:
当所述电网频率大于所述第二频率阈值,小于或等于所述第一频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率。When the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to reduce the generated power.
在本公开一些实施例中,所述当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率,包括:In some embodiments of the present disclosure, when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operating state, controlling the photovoltaic equipment to reduce the power generation includes:
当所述电网频率大于所述第一频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备停止向所述交流电网馈电。When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
在本公开一些实施例中,所述当所述电网频率大于所述第一频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备停止向所述交流电网馈电之后,还包括:In some embodiments of the present disclosure, when the grid frequency is greater than the first frequency threshold and the electrical device is in a non-operating state, after controlling the photovoltaic device to stop feeding power to the AC grid, Also includes:
在所述光伏设备停止向所述交流电网馈电持续预设保护期后,返回所述获取用电设备接入的交流电网的电网频率。After the photovoltaic device stops feeding power to the AC grid for a preset protection period, returning to the obtained grid frequency of the AC grid connected to the electrical device.
在本公开一些实施例中,所述获取用电设备接入的交流电网的电网频率之后,还包括:In some embodiments of the present disclosure, after acquiring the grid frequency of the AC grid connected to the electrical device, the method further includes:
当所述电网频率大于预设频率阈值时,记录电网频率异常状态。When the grid frequency is greater than the preset frequency threshold, record the abnormal state of the grid frequency.
在本公开一些实施例中,提供一种光伏设备控制装置,包括:In some embodiments of the present disclosure, a photovoltaic equipment control apparatus is provided, including:
工作状态获取模块,用于获取用电设备的工作状态;所述工作状态包括运行状态和未运行状态;a working state obtaining module, used for obtaining the working state of the electrical equipment; the working state includes a running state and a non-running state;
电网频率获取模块,用于获取用电设备接入的交流电网的电网频率;The grid frequency acquisition module is used to acquire the grid frequency of the AC grid connected to the electrical equipment;
第一控制模块,用于当所述电网频率大于预设频率阈值,且所述用电设备处于运行状 态时,控制光伏设备停止向所述交流电网馈电;所述用电设备和所述交流电网均连接所述光伏设备;a first control module, configured to control the photovoltaic equipment to stop feeding power to the AC power grid when the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state; the electrical equipment and the AC The grid is connected to the photovoltaic equipment;
第二控制模块,用于当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率。A second control module, configured to control the photovoltaic device to reduce power generation when the grid frequency is greater than the preset frequency threshold and the electrical device is in a non-operating state.
在本公开一些实施例中,提供一种光伏设备控制设备,包括控制装置、采样电路和检测器,所述采样电路连接交流电网,所述检测器连接所述用电设备,所述采样电路和所述检测器均连接所述控制装置,所述采样电路用于采集用电设备接入的交流电网的电网频率并发送至控制装置,所述检测器用于检测用电设备的工作状态并发送至控制装置,所述控制装置用于根据上述的方法进行光伏设备控制。In some embodiments of the present disclosure, a photovoltaic device control device is provided, including a control device, a sampling circuit and a detector, the sampling circuit is connected to an AC power grid, the detector is connected to the electrical equipment, the sampling circuit and The detectors are all connected to the control device, and the sampling circuit is used to collect the grid frequency of the AC power grid connected to the electrical equipment and send it to the control device. The detector is used to detect the working state of the electrical equipment and send it to the control device. A control device for controlling photovoltaic equipment according to the above method.
在本公开一些实施例中,提供一种光伏***,包括光伏设备、用电设备、交流电网和如上述的光伏设备控制设备,所述用电设备和所述交流电网均连接所述光伏设备,所述用电设备还连接所述交流电网。In some embodiments of the present disclosure, a photovoltaic system is provided, including photovoltaic equipment, electrical equipment, an alternating current grid, and the above photovoltaic equipment control equipment, wherein the electrical equipment and the alternating current grid are both connected to the photovoltaic equipment, The electrical equipment is also connected to the AC power grid.
在本公开一些实施例中,所述用电设备为空调。In some embodiments of the present disclosure, the electrical device is an air conditioner.
图1为本公开一些实施例中光伏设备控制方法的流程图;FIG. 1 is a flowchart of a method for controlling a photovoltaic device in some embodiments of the present disclosure;
图2为本公开另一些实施例中光伏设备控制方法的流程图;FIG. 2 is a flowchart of a photovoltaic device control method in other embodiments of the present disclosure;
图3为本公开一些实施例中包括空调***、用电设备和交流电网的***的框图;FIG. 3 is a block diagram of a system including an air conditioning system, an electrical device, and an AC power grid in some embodiments of the present disclosure;
图4为本公开又一些实施例中光伏设备控制方法的流程图。FIG. 4 is a flowchart of a method for controlling a photovoltaic device according to further embodiments of the present disclosure.
为了使本公开的目的、技术方案及优点更加清楚明白,以下通过实施例,并结合附图,对本公开进行更加全面的描述。应当理解,此处所描述的具体实施例仅用以解释本公开,并不用于限定本公开。In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be described more fully hereinafter through the embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, but not to limit the present disclosure.
本公开针对传统的光伏设备工作性能不佳的问题,提出了一种光伏设备控制方法、装置、设备及光伏***,该光伏设备控制方法、装置、设备及光伏***可以达到减小光伏发电对电网不稳定的影响,提高使用可靠性的技术效果。Aiming at the problem of poor performance of traditional photovoltaic equipment, the present disclosure proposes a photovoltaic equipment control method, device, equipment and photovoltaic system. The photovoltaic equipment control method, device, equipment and photovoltaic system can reduce the impact of photovoltaic power generation on the power grid. The effect of instability, the technical effect of improving the reliability of use.
在本公开一些实施例中,请参见图1,提供一种光伏设备控制方法,该方法基于用电设备、光伏设备和交流电网形成的***实现,用电设备连接光伏设备,可以获取光伏设备产生的电能供自身工作,用电设备还连接交流电网,可以使用来自交流电网的电能,用电 设备可以选择性地从光伏设备处获取电能,或从交流电网处获取电能,也可以同时从光伏设备和交流电网处获取电能。光伏设备还连接交流电网,可以将产生的电能传输至交流电网中,实现馈电。光伏设备控制方法可通过控制装置执行,其中,控制装置可以为独立于光伏设备、用电设备和交流电网之外的设备,也可以采用光伏设备、用电设备和交流电网之中已有的控制装置,以节约硬件成本,具体可根据实际需求选择,只要本领域技术人员可以实现即可。用电设备的类型并不是唯一的,在本公开上述实施例中,以用电设备为空调为例,空调包括空调外机和空调内机,光伏设备和交流电网均连接空调外机,空调外机可利用光伏设备提供的电能工作,光伏电能来自于太阳且对环境没有任何的污染,在光照不足的时候,空调外机同样可以在电网取电,不影响空调功能的正常使用。光伏设备控制方法包括以下步骤:In some embodiments of the present disclosure, referring to FIG. 1 , a method for controlling photovoltaic equipment is provided. The method is implemented based on a system formed by electrical equipment, photovoltaic equipment, and an AC power grid. The electrical equipment is connected to the photovoltaic equipment, and the photovoltaic equipment can obtain the output generated by the photovoltaic equipment. The electrical energy is used for its own work, and the electrical equipment is also connected to the AC power grid, and can use the electrical energy from the AC power grid. and the AC grid to obtain electricity. Photovoltaic equipment is also connected to the AC power grid, and can transmit the generated electric energy to the AC power grid for power feeding. The photovoltaic equipment control method can be implemented by a control device, wherein the control device can be a device independent of the photovoltaic equipment, the electrical equipment and the AC grid, or the existing control in the photovoltaic equipment, the electrical equipment and the AC grid can be used. In order to save the cost of hardware, the device can be selected according to actual needs, as long as those skilled in the art can realize it. The type of electrical equipment is not unique. In the above embodiments of the present disclosure, the electrical equipment is an air conditioner as an example. The air conditioner includes an air conditioner external unit and an air conditioner internal unit. The air conditioner can work with the electric energy provided by the photovoltaic equipment. The photovoltaic electric energy comes from the sun and does not pollute the environment. When the light is insufficient, the external air conditioner can also draw electricity from the power grid, which does not affect the normal use of the air conditioner. The photovoltaic equipment control method includes the following steps:
步骤S200:获取用电设备的工作状态。Step S200: Acquire the working state of the electrical equipment.
在本公开一些实施例中,工作状态包括运行状态和未运行状态。在执行光伏设备控制方法时,首先检测用电设备的工作状态,为后续针对用电设备的不同的工作状态提供不同的控制步骤提供依据。一般来说,工作状态包括运行状态和未运行状态,可以理解,在本公开其他一些实施例中,工作状态还可以包括其他状态,例如低功率运行状态和高功率运行状态等,其后续的控制过程可参照相近的工作状态的控制过程,例如在用电设备处于低功率运行状态时,可按照用电设备处于未运行状态的情况执行后续步骤,具体可根据实际需求调整。In some embodiments of the present disclosure, the working state includes a running state and a non-running state. When executing the photovoltaic equipment control method, the working state of the electrical equipment is detected first, which provides a basis for subsequently providing different control steps for different working states of the electrical equipment. Generally speaking, the working state includes a running state and a non-working state. It can be understood that in some other embodiments of the present disclosure, the working state may also include other states, such as a low-power running state and a high-power running state, and the subsequent control The process can refer to the control process of the similar working state. For example, when the electrical equipment is in a low-power operating state, the subsequent steps can be performed according to the situation that the electrical equipment is not operating, which can be adjusted according to actual needs.
在本公开一些实施例中,获取用电设备的工作状态的方式并不是唯一的,例如可采用传感器检测用电设备的工作参数,传感器连接控制装置,传感器将检测到的参数发送至控制装置,由控制装置根据接收到的参数判断用电设备的工作状态。以用电设备为空调为例,可使用传感器检测空调的工作参数,控制装置根据传感器检测到的工作参数判断压缩机是否正常运行,从而判断空调处于运行状态或未运行状态。In some embodiments of the present disclosure, the method of acquiring the working state of the electrical equipment is not unique. For example, a sensor may be used to detect the working parameters of the electrical equipment, the sensor is connected to the control device, and the sensor sends the detected parameter to the control device. The control device determines the working state of the electrical equipment according to the received parameters. Taking the electrical equipment as an air conditioner as an example, the sensor can be used to detect the working parameters of the air conditioner, and the control device judges whether the compressor is running normally according to the working parameters detected by the sensor, thereby judging whether the air conditioner is running or not running.
步骤S400:获取用电设备接入的交流电网的电网频率。Step S400: Obtain the grid frequency of the AC grid to which the electrical device is connected.
在本公开一些实施例中,用电设备和光伏设备均连接交流电网,交流电网的频率波动会影响到整个***的工作性能。获取用电设备接入的交流电网的电网频率,以此为依据判断电网频率是否正常,实现对电网频率的监测,有利于提高光伏设备和用电设备的工作性能。获取交流电网的电网频率的方式并不是唯一的,例如可通过采样电路对交流电网的电网频率进行采样,采样电路连接控制装置,采样电路将采集到的电网频率发送至控制装置,便于进行后续处理。可选择地,采样电路可以按照预设时间间隔对电网频率进行采样并发 送至控制装置,简化控制流程,采样电路还可以实时对电网频率进行采样并发送至控制装置,提高电网频率监测的有效性。In some embodiments of the present disclosure, both the electrical equipment and the photovoltaic equipment are connected to the AC power grid, and the frequency fluctuation of the AC power grid will affect the working performance of the entire system. Obtain the grid frequency of the AC power grid connected to the electrical equipment, and judge whether the grid frequency is normal based on this, and realize the monitoring of the grid frequency, which is conducive to improving the working performance of photovoltaic equipment and electrical equipment. The way to obtain the grid frequency of the AC grid is not unique. For example, the grid frequency of the AC grid can be sampled through a sampling circuit, the sampling circuit is connected to the control device, and the sampling circuit sends the collected grid frequency to the control device for subsequent processing. . Optionally, the sampling circuit can sample the grid frequency at preset time intervals and send it to the control device, simplifying the control process, and the sampling circuit can also sample the grid frequency in real time and send it to the control device to improve the effectiveness of grid frequency monitoring. .
步骤S600:当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电。Step S600: when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a running state, control the photovoltaic equipment to stop feeding power to the AC grid.
在本公开一些实施例中,用电设备和交流电网均连接光伏设备,光伏设备既可以给用电设备供电,又能给交流电网馈电。当控制装置判断电网频率大于预设频率阈值时,考虑此时电网频率异常,结合用电设备的工作状态进行后续控制,控制光伏设备停止向交流电网馈电,减小光伏设备的发电量,避免光伏设备发电量过大加剧电网频率的波动。当用电设备处于运行状态时,考虑此时用电设备需要电能,在控制光伏设备停止向交流电网馈电的基础上,可以控制光伏设备对用电设备供电,使用电设备可以正常使用,进一步地,光伏设备的发电量小于用电设备的用电量,保证光伏发电的电能完全被用电设备消耗,无法向电网发电。可扩展地,在控制光伏设备停止向交流电网馈电的基础上,还可以控制光伏设备停止向用电设备发电,进一步减轻光伏设备发电对电网频率波动的影响。In some embodiments of the present disclosure, both the electrical equipment and the AC power grid are connected to photovoltaic equipment, and the photovoltaic equipment can not only supply power to the electrical equipment, but also feed the AC power grid. When the control device judges that the grid frequency is greater than the preset frequency threshold, consider that the grid frequency is abnormal at this time, and carry out follow-up control combined with the working state of the electrical equipment to control the photovoltaic equipment to stop feeding power to the AC grid, reduce the power generation of the photovoltaic equipment, and avoid The excessive power generation of photovoltaic equipment aggravates the fluctuation of grid frequency. When the electrical equipment is in the running state, considering that the electrical equipment needs power at this time, on the basis of controlling the photovoltaic equipment to stop feeding the AC power grid, the photovoltaic equipment can be controlled to supply power to the electrical equipment, and the electrical equipment can be used normally. Further The power generation of photovoltaic equipment is less than the power consumption of electrical equipment, ensuring that the electricity generated by photovoltaic power generation is completely consumed by electrical equipment and cannot generate electricity to the grid. Scalable, on the basis of controlling the photovoltaic equipment to stop feeding power to the AC power grid, the photovoltaic equipment can also be controlled to stop generating electricity to the electrical equipment, further reducing the impact of the photovoltaic equipment power generation on the frequency fluctuation of the power grid.
步骤S800:当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率。Step S800: When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operational state, control the photovoltaic equipment to reduce the generating power.
在本公开一些实施例中,当控制装置判断电网频率大于预设频率阈值时,考虑此时电网频率异常,结合用电设备的工作状态进行后续控制,控制光伏设备降低发电功率,减小光伏设备的发电量,避免光伏设备发电量过大加剧电网频率的波动。具体地,控制光伏设备降低发电功率可以为控制光伏设备的发电功率降低至某一数值,或者控制光伏设备停止发电,可根据实际需求调整。当用电设备处于未运行状态时,考虑此时用电设备不需要电能,光伏设备可以不用向用电设备发电,控制光伏设备降低发电功率具体为控制光伏设备降低对交流电网的发电功率。结合用电设备的工作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。In some embodiments of the present disclosure, when the control device determines that the grid frequency is greater than the preset frequency threshold, the grid frequency is considered abnormal at this time, and the subsequent control is performed in combination with the working state of the electrical equipment to control the photovoltaic equipment to reduce the generated power and reduce the photovoltaic equipment. To avoid the excessive power generation of photovoltaic equipment and aggravate the fluctuation of grid frequency. Specifically, controlling the photovoltaic equipment to reduce the power generation can be controlling the photovoltaic equipment to reduce the generating power to a certain value, or controlling the photovoltaic equipment to stop generating power, which can be adjusted according to actual needs. When the electrical equipment is not running, considering that the electrical equipment does not need electricity at this time, the photovoltaic equipment can not generate electricity to the electrical equipment. By controlling the photovoltaic equipment in combination with the working state of the electrical equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
在本公开一些实施例中,预设频率阈值包括第一频率阈值和第二频率阈值,第二频率阈值小于第一频率阈值,请参见图2,步骤S600包括步骤S620。In some embodiments of the present disclosure, the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold, see FIG. 2 , step S600 includes step S620 .
步骤S620:当电网频率大于第二频率阈值,小于或等于第一频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电。Step S620 : when the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a running state, control the photovoltaic equipment to stop feeding power to the AC grid.
具体地,预设频率阈值的数量并不是唯一的,在本公开一些实施例中,预设频率阈值 的数量为两个,包括第一频率阈值和第二频率阈值,第二频率阈值小于第一频率阈值,第一频率阈值和第二频率阈值可以将频率划分为三个区间,将获取到的电网频率与第一频率阈值和第二频率阈值比较,根据比较结果可以判断获取到的频率阈值处于哪个区间内,由此可对不同区间内的频率阈值做出不同的后续控制,提高了控制的准确性。第一频率阈值和第二频率阈值的取值也不是唯一的,可由本领域技术人员根据实际需求确定,在本公开一些实施例中,第一频率阈值可以为52Hz,第二频率阈值可以为50.25Hz。可以理解,在公开其他一些实施例中,第一频率阈值和第二频率阈值也可以为其他取值。Specifically, the number of preset frequency thresholds is not unique. In some embodiments of the present disclosure, the number of preset frequency thresholds is two, including a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold. Frequency threshold, the first frequency threshold and the second frequency threshold can divide the frequency into three intervals, and the obtained grid frequency is compared with the first frequency threshold and the second frequency threshold. According to the comparison result, it can be determined that the obtained frequency threshold is in the range. In which interval, different subsequent controls can be made on the frequency thresholds in different intervals, which improves the accuracy of the control. The values of the first frequency threshold and the second frequency threshold are not unique, and can be determined by those skilled in the art according to actual needs. In some embodiments of the present disclosure, the first frequency threshold may be 52 Hz, and the second frequency threshold may be 50.25 Hz Hz. It can be understood that in other disclosed embodiments, the first frequency threshold and the second frequency threshold may also be other values.
在本公开一些实施例中,当获取到的电网频率大于50.25Hz,小于或等于52Hz时,考虑电网频率偏高。此时若用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,以减小光伏设备的发电量,进一步地,由于此时电网频率并不算太高,因此可以控制光伏设备向用电设备发电,使用电设备可以正常使用,光伏设备的发电量小于用电设备的用电量,保证光伏发电的电能完全被用电设备消耗,无法向电网发电。在减少由于光伏设备发电对电网频率造成的影响外,还能使用电设备工作,使用可靠。In some embodiments of the present disclosure, when the obtained grid frequency is greater than 50.25 Hz and less than or equal to 52 Hz, it is considered that the grid frequency is high. At this time, if the electrical equipment is in the running state, the photovoltaic equipment can be controlled to stop feeding power to the AC grid to reduce the power generation of the photovoltaic equipment. Further, since the grid frequency is not too high at this time, the photovoltaic equipment can be controlled to Electrical equipment generates electricity, and electrical equipment can be used normally. The power generation of photovoltaic equipment is less than the power consumption of electrical equipment, ensuring that the electricity generated by photovoltaic power generation is completely consumed by electrical equipment and cannot generate electricity to the grid. In addition to reducing the impact of photovoltaic equipment power generation on the frequency of the power grid, it can also use electrical equipment to work and be reliable.
在本公开一些实施例中,请参见图2,步骤S600包括步骤S640。In some embodiments of the present disclosure, referring to FIG. 2 , step S600 includes step S640.
步骤S640:当电网频率大于第一频率阈值,且用电设备处于运行状态时,控制光伏设备停机。Step S640: When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, control the photovoltaic equipment to stop.
在本公开一些实施例中,以第一频率阈值为52Hz,第二频率阈值为50.25Hz为例,当电网频率大于第一频率阈值,即电网频率超过52Hz时,考虑电网频率过高,此时就算用电设备处于运行状态,为了减小光伏设备的发电量,减少由于光伏设备发电对电网频率造成的影响,此时控制光伏设备停机,使光伏设备既不向交流电网馈电,也不向用电设备发电,以提高用电设备和交流电网工作的稳定性。In some embodiments of the present disclosure, taking the first frequency threshold as 52 Hz and the second frequency threshold as 50.25 Hz as an example, when the grid frequency is greater than the first frequency threshold, that is, when the grid frequency exceeds 52 Hz, the grid frequency is considered to be too high. Even if the electrical equipment is running, in order to reduce the power generation of the photovoltaic equipment and reduce the impact of the power generation of the photovoltaic equipment on the frequency of the power grid, the photovoltaic equipment is controlled to stop at this time, so that the photovoltaic equipment neither feeds the AC power grid nor supplies power to the power grid. The electrical equipment generates electricity to improve the stability of the electrical equipment and the operation of the AC power grid.
在本公开一些实施例中,在步骤S640之后,光伏设备控制方法还包括步骤660。In some embodiments of the present disclosure, after step S640 , the photovoltaic device control method further includes step 660 .
步骤660:在光伏设备停机持续预设保护期后,返回步骤S400。Step 660: Return to step S400 after the photovoltaic device is shut down for the preset protection period.
在本公开一些实施例中,在光伏设备停机后,需要经过一段时间的保护期,如未到时间,***停机状态不恢复,如此可避免设备频繁启停和工作造成工作负荷过大,从而提高光伏设备的工作性能。在光伏设备停机持续预设保护期后,已经满足保护时间,此时返回步骤S400,控制装置重新获取用电设备接入的交流电网的电网频率,并依次执行后续步骤,即根据获取到的电网频率域预设频域阈值的大小关系执行相应步骤。在光伏设备停机持续预设保护期后返回步骤S400,返回前序步骤可以持续获取电网频率,并根据获取到的电网频率与预设频率阈值的大小关系执行相应步骤,实现对电网频率的持续监测,光伏设备停 机后持续预设保护期后再返回前序步骤,可避免设备频繁启停和工作造成工作负荷过大,有利于提高光伏设备及与之相连的设备的工作性能。预设保护期的具体时长并不是唯一的,可根据国标GB/T 37408中的标准设置,一般来说,预设保护期可以在60s-300s内取值,不低于60s即可,不会影响光伏设备的正常使用。In some embodiments of the present disclosure, after the photovoltaic equipment is shut down, a period of protection needs to pass. If the time is not reached, the shutdown state of the system will not be restored, so as to avoid frequent startup and shutdown of the equipment and excessive workload caused by operation, thereby improving the The working performance of photovoltaic equipment. After the photovoltaic equipment has been shut down for the preset protection period, the protection time has been met. At this time, the process returns to step S400, and the control device re-acquires the grid frequency of the AC grid connected to the electrical equipment, and executes the subsequent steps in sequence, that is, according to the obtained grid frequency The corresponding steps are performed according to the magnitude relationship of the preset frequency domain threshold in the frequency domain. After the photovoltaic equipment is shut down for the preset protection period, return to step S400, and return to the previous steps to continuously obtain the grid frequency, and perform corresponding steps according to the relationship between the obtained grid frequency and the preset frequency threshold, so as to realize continuous monitoring of the grid frequency , after the photovoltaic equipment stops for a preset protection period and then returns to the previous steps, it can avoid frequent starting and stopping of the equipment and excessive workload caused by working, which is beneficial to improve the working performance of the photovoltaic equipment and the equipment connected to it. The specific duration of the preset protection period is not unique. It can be set according to the standard in the national standard GB/T 37408. Generally speaking, the preset protection period can take a value within 60s-300s, and it is not less than 60s. Affect the normal use of photovoltaic equipment.
在本公开一些实施例中,预设频率阈值包括第一频率阈值和第二频率阈值,第二频率阈值小于第一频率阈值,请参见图2,步骤S800包括步骤S820。In some embodiments of the present disclosure, the preset frequency threshold includes a first frequency threshold and a second frequency threshold, the second frequency threshold is smaller than the first frequency threshold, see FIG. 2 , step S800 includes step S820 .
步骤S820:当电网频率大于第二频率阈值,小于或等于第一频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率。Step S820 : when the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a non-operational state, control the photovoltaic equipment to reduce the generated power.
具体地,预设频率阈值的数量并不是唯一的,在本公开一些实施例中,预设频率阈值的数量为两个,包括第一频率阈值和第二频率阈值,第二频率阈值小于第一频率阈值,第一频率阈值和第二频率阈值可以将频率划分为三个区间,将获取到的电网频率与第一频率阈值和第二频率阈值比较,根据比较结果可以判断获取到的频率阈值处于哪个区间内,由此可对不同区间内的频率阈值做出不同的后续控制,提高了控制的准确性。第一频率阈值和第二频率阈值的取值也不是唯一的,可由本领域技术人员根据实际需求确定,在本公开一些实施例中,第一频率阈值可以为52Hz,第二频率阈值可以为50.25Hz。可以理解,在本公开其他一些实施例中,第一频率阈值和第二频率阈值也可以为其他取值。Specifically, the number of preset frequency thresholds is not unique. In some embodiments of the present disclosure, the number of preset frequency thresholds is two, including a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold. Frequency threshold, the first frequency threshold and the second frequency threshold can divide the frequency into three intervals, and the obtained grid frequency is compared with the first frequency threshold and the second frequency threshold. According to the comparison result, it can be determined that the obtained frequency threshold is in the range. In which interval, different subsequent controls can be made on the frequency thresholds in different intervals, which improves the accuracy of the control. The values of the first frequency threshold and the second frequency threshold are not unique, and can be determined by those skilled in the art according to actual needs. In some embodiments of the present disclosure, the first frequency threshold may be 52 Hz, and the second frequency threshold may be 50.25 Hz Hz. It can be understood that, in other embodiments of the present disclosure, the first frequency threshold and the second frequency threshold may also be other values.
在本公开一些实施例中,以第一频率阈值为52Hz,第二频率阈值为50.25Hz为例,当电网频率大于第二频率阈值,小于或等于第一频率阈值,即电网频率大于50.25Hz,小于或等于52Hz时,考虑电网频率偏高,且用电设备处于未运行状态,不会消耗光伏设备的电量,此时控制光伏设备降低发电功率,光伏设备进入发电功率限制状态,以降低后的功率对交流电网馈电,根据电网频率的大小来进行发电功率的控制,在合理利用光伏设备发电量的同时,减小光伏设备发电量过大对电网频率波动造成的影响。In some embodiments of the present disclosure, taking the first frequency threshold as 52 Hz and the second frequency threshold as 50.25 Hz as an example, when the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, that is, the grid frequency is greater than 50.25 Hz, When it is less than or equal to 52Hz, it is considered that the frequency of the grid is high, and the electrical equipment is not running and will not consume the power of the photovoltaic equipment. At this time, the photovoltaic equipment is controlled to reduce the generating power, and the photovoltaic equipment enters the generating power limit state. The power feeds the AC power grid, and the power generation is controlled according to the frequency of the power grid. While the power generation of the photovoltaic equipment is reasonably utilized, the influence of the excessive power generation of the photovoltaic equipment on the frequency fluctuation of the power grid is reduced.
在本公开一些实施例中,请参见图2,步骤S800包括步骤S840。In some embodiments of the present disclosure, referring to FIG. 2 , step S800 includes step S840.
步骤S840:当电网频率大于第一频率阈值,且用电设备处于未运行状态时,控制光伏设备停止向交流电网馈电。Step S840: When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a non-operating state, control the photovoltaic equipment to stop feeding power to the AC grid.
在本公开一些实施例中,以第一频率阈值为52Hz,第二频率阈值为50.25Hz为例,当电网频率大于第一频率阈值,即电网频率超过52Hz时,考虑电网频率过高,且用电设备处于未运行状态,不会消耗光伏设备的电量,光伏设备相当于停止向用电设备供电,此时控制光伏设备停止向交流电网馈电,使光伏设备既不向交流电网馈电,也不向用电设备发电,以提高用电设备和交流电网工作的稳定性。In some embodiments of the present disclosure, taking the first frequency threshold as 52 Hz and the second frequency threshold as 50.25 Hz as an example, when the grid frequency is greater than the first frequency threshold, that is, when the grid frequency exceeds 52 Hz, it is considered that the grid frequency is too high, and the The electrical equipment is not running and will not consume the power of the photovoltaic equipment. The photovoltaic equipment is equivalent to stopping power supply to the electrical equipment. At this time, the photovoltaic equipment is controlled to stop feeding the AC grid, so that the photovoltaic equipment neither feeds the AC grid nor Do not generate electricity to electrical equipment to improve the stability of electrical equipment and AC grid operation.
在本公开一些实施例中,步骤S840之后,光伏设备控制方法还包括步骤860。In some embodiments of the present disclosure, after step S840 , the photovoltaic device control method further includes step 860 .
步骤860:在光伏设备停止向交流电网馈电持续预设保护期后,返回步骤S400。Step 860: Return to step S400 after the photovoltaic device stops feeding the AC power grid for the preset protection period.
在本公开一些实施例中,在光伏设备停止向交流电网馈电后,需要经过一段时间的保护期,如未到时间,***停机状态不恢复,如此可避免设备频繁启停和工作造成工作负荷过大,从而提高光伏设备的工作性能。在光伏设备停止向交流电网馈电持续预设保护期后,已经满足保护时间,此时返回步骤S400,控制装置重新获取用电设备接入的交流电网的电网频率,并依次执行后续步骤,即根据获取到的电网频率域预设频率阈值的大小关系执行相应步骤。在光伏设备停止向交流电网馈电持续预设保护期后返回步骤S400,返回前序步骤可以持续获取电网频率,并根据获取到的电网频率与预设频率阈值的大小关系执行相应步骤,实现对电网频率的持续监测,还可避免设备频繁启停和工作造成工作负荷过大,有利于提高光伏设备及与之相连的设备的工作性能。预设保护期的具体时长并不是唯一的,可根据国标GB/T 37408中的标准设置,一般来说,预设保护期可以在60s-300s内取值,不低于60s即可,不会影响光伏设备的正常使用。In some embodiments of the present disclosure, after the photovoltaic device stops feeding power to the AC power grid, a protection period of a certain period of time is required. If the time is not reached, the shutdown state of the system will not be restored, which can avoid frequent startup and shutdown of the device and workload caused by work. is too large, thereby improving the working performance of photovoltaic equipment. After the photovoltaic equipment stops feeding power to the AC power grid for the preset protection period, the protection time has been met, and then returns to step S400, and the control device re-acquires the power grid frequency of the AC power grid to which the electrical equipment is connected, and executes the subsequent steps in sequence, namely, Corresponding steps are performed according to the acquired magnitude relationship of the preset frequency thresholds in the frequency domain of the power grid. Return to step S400 after the photovoltaic equipment stops feeding power to the AC power grid for the preset protection period. Returning to the previous steps, the grid frequency can be continuously obtained, and corresponding steps are performed according to the relationship between the obtained grid frequency and the preset frequency threshold, so as to realize the control of the grid frequency. The continuous monitoring of the grid frequency can also prevent the equipment from starting and stopping frequently and the work load is too large, which is beneficial to improve the working performance of the photovoltaic equipment and the equipment connected to it. The specific duration of the preset protection period is not unique. It can be set according to the standard in the national standard GB/T 37408. Generally speaking, the preset protection period can take a value within 60s-300s, and it is not less than 60s. Affect the normal use of photovoltaic equipment.
在本公开一些实施例中,步骤S400之后,光伏设备控制方法还包括步骤500。其中,步骤500可以与步骤S600或步骤S800同时执行。In some embodiments of the present disclosure, after step S400 , the photovoltaic device control method further includes step 500 . Wherein, step 500 may be performed simultaneously with step S600 or step S800.
步骤500:当电网频率大于预设频率阈值时,记录电网频率异常状态。Step 500: When the grid frequency is greater than the preset frequency threshold, record the abnormal state of the grid frequency.
在本公开一些实施例中,具体地,可通过设置标志位记录电网频率异常状态,通过将标志位置1表示电网频率异常,对应地,当电网频率小于预设频率阈值后,则可清除异常状态记录,具体将标志位置0表示电网频率正常。在本本公开一些实施例中,以预设频率阈值的包括第一频率阈值和第二频率阈值为例,标志位的数量可以为两个,包括过欠频保护标志位和防馈网标志位,当获取到电网频率大于第二频率阈值时,防馈网标志位置位为1,当获取到电网频率小于或等于第二频率阈值时,防馈网标志位复位为0,当获取到电网频率大于第一频率阈值时,过欠频保护标志位置位为1,当获取到电网频率小于或等于第一频率阈值时,过欠频保护标志位复位为0。当电网频率大于预设频率阈值时,考虑此时电网频率出现异常。控制装置的存储器中设置有标志位,当电网频率出现异常,将对应的标志位置位,在进行后续处理时,可根据标志位的状态快速获取电网频率的异常状态,使用便捷。标志位的数量并不是唯一的,可根据预设频率阈值的数量调整,也可根据实际需求调整。In some embodiments of the present disclosure, specifically, the abnormal state of the power grid frequency can be recorded by setting the flag bit, and the abnormal state of the power grid frequency can be cleared by setting the flag position to 1, and correspondingly, when the power grid frequency is less than the preset frequency threshold, the abnormal state can be cleared. Record, specifically set the flag position to 0 to indicate that the grid frequency is normal. In some embodiments of the present disclosure, taking the preset frequency threshold including the first frequency threshold and the second frequency threshold as an example, the number of flag bits may be two, including the over-under-frequency protection flag bit and the anti-feeding network flag bit, When the obtained grid frequency is greater than the second frequency threshold, the anti-feeding network flag is set to 1; when the obtained grid frequency is less than or equal to the second frequency threshold, the anti-feeding network flag is reset to 0; when the obtained grid frequency is greater than When the first frequency threshold is set, the over-under-frequency protection flag is set to 1, and when the obtained grid frequency is less than or equal to the first frequency threshold, the over-under-frequency protection flag is reset to 0. When the grid frequency is greater than the preset frequency threshold, it is considered that the grid frequency is abnormal at this time. A flag bit is set in the memory of the control device. When the grid frequency is abnormal, the corresponding flag bit is set, and during subsequent processing, the abnormal state of the grid frequency can be quickly obtained according to the status of the flag bit, which is convenient to use. The number of flag bits is not unique, and can be adjusted according to the number of preset frequency thresholds or according to actual needs.
上述光伏设备控制方法,首先获取用电设备的工作状态,然后获取用电设备接入的交流电网的电网频率,当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光 伏设备停止向交流电网馈电,当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率,其中,用电设备和交流电网均连接光伏设备。结合用电设备的工作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。The above photovoltaic equipment control method first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in the running state, the photovoltaic equipment is controlled. Stop feeding power to the AC grid. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment. By controlling the photovoltaic equipment in combination with the working state of the electrical equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
为了更好地理解上述实施例,以下结合一些具体的实施例进行详细的解释说明。在本公开上述实施例中,提供一种光伏设备控制方法,用电设备为空调***,通过对电网侧频率的采集,及对当前空调***的工作状态的确定,来进行光伏设备发电功率限制的控制。通过降低和限制发电功率来减小对电网的影响,以及对空调***使用状态的确认,来合理利用光伏设备发电能量提供给空调***使用,从而达到光伏发电最大化的方法,避免光伏发电的浪费。In order to better understand the above embodiments, detailed explanations are given below in conjunction with some specific embodiments. In the above-mentioned embodiments of the present disclosure, a method for controlling photovoltaic equipment is provided. The electrical equipment is an air conditioning system, and the power generation power limitation of photovoltaic equipment is performed by collecting the frequency on the grid side and determining the working state of the current air conditioning system. control. By reducing and limiting the power generation to reduce the impact on the power grid, and confirming the use status of the air conditioning system, the energy generated by the photovoltaic equipment can be reasonably used for the air conditioning system, so as to maximize the photovoltaic power generation and avoid the waste of photovoltaic power generation. .
以用电设备为空调***为例,图3为本公开一些实施例中包括空调***、用电设备和交流电网的***的框图,图中实线部分为电力线,虚线部分为通信线,光伏设备为空调***提供光伏能量,光伏设备连接至DC/DC电路至直流母线部分,空调内机从直流母线取电,空调***不启动时,或光伏发电量大于空调***用电量时,光伏能量将通过双向AC/DC电路部分将能量传递至电网,空调外机优先从光伏侧取电,当光伏侧不发电的时候可以从交流电网侧取电,不影响空调的使用。第一频率阈值为电网频率限值1,第二频率阈值为电网频率限值2,电网频率限值1指光伏空调***采集到的电网频率达到某一限值,电网频率限值2指光伏空调***采集到的电网频率达到某一限值,电网频率限值2小于电网频率限值1,光伏发电功率受限指光伏发电量根据电网频率成一定关系的降低或减少。Taking the electrical equipment as an air-conditioning system as an example, FIG. 3 is a block diagram of a system including an air-conditioning system, electrical equipment and an AC power grid in some embodiments of the present disclosure. Provide photovoltaic energy for the air conditioning system, the photovoltaic equipment is connected to the DC/DC circuit to the DC bus part, the air conditioner internal unit draws power from the DC bus, when the air conditioning system does not start, or when the photovoltaic power generation is greater than the power consumption of the air conditioning system, the photovoltaic energy will be The energy is transferred to the power grid through the bidirectional AC/DC circuit part, and the external unit of the air conditioner takes power from the photovoltaic side preferentially. The first frequency threshold is the grid frequency limit 1, the second frequency threshold is the grid frequency limit 2, the grid frequency limit 1 refers to the grid frequency collected by the photovoltaic air conditioning system reaching a certain limit, and the grid frequency limit 2 refers to the photovoltaic air conditioner The grid frequency collected by the system reaches a certain limit, the grid frequency limit 2 is less than the grid frequency limit 1, and the photovoltaic power generation limit refers to the reduction or reduction of photovoltaic power generation in a certain relationship according to the grid frequency.
在本公开一些实施例中,具体地,请参见图4,光伏设备控制方法执行时,首先检测空调部分是否运行,当空调部分运行时,***检测到电网频率增加至某一限值时,例如检测到电网频率为52Hz时,***过欠频保护标志位置位,***报过欠频保护,光伏部分和空调部分都停机,此时,空调不可使用,光伏也不能向电网发电。检测到电网频率小于52Hz,过欠频保护标志位为1时,需要经过一定时间的保护期,如未到时间,***停机状态不恢复。如已经满足保护时间,***重新检测电网频率是否超过52Hz,如超过52Hz,***继续报出过欠频故障,继续停机,如不超过52Hz,***过欠频保护标志位复位。如此时电网频率大于频率限值2时,例如频率限值2为50.25Hz时,***防馈网标志位置位,空调部分正常使用,光伏发电部分小于空调用电量,保证光伏发电完全被空调消耗,无法向电网发电。如检测到电网频率满足防馈网标志位复位条件时,表示此时电网已经恢复正 常使用,此时空调正常使用,光伏发电不受限制,可以以最大功率向电网发电。In some embodiments of the present disclosure, specifically, referring to FIG. 4 , when the photovoltaic device control method is executed, it is first detected whether the air conditioning part is running. When the air conditioning part is running, the system detects that the grid frequency increases to a certain limit, for example When it is detected that the grid frequency is 52Hz, the system over-under-frequency protection flag is set, the system reports over-under-frequency protection, and both the photovoltaic part and the air conditioner part are shut down. At this time, the air conditioner cannot be used, and the photovoltaic cannot generate electricity to the grid. When it is detected that the grid frequency is less than 52Hz, and the over-under-frequency protection flag is 1, a certain protection period needs to pass. If the time is not reached, the system shutdown state will not recover. If the protection time has been met, the system will re-detect whether the grid frequency exceeds 52Hz. If it exceeds 52Hz, the system will continue to report the over-under-frequency fault and continue to stop. If it does not exceed 52Hz, the system over-under-frequency protection flag will be reset. In this case, when the grid frequency is greater than the frequency limit 2, for example, when the frequency limit 2 is 50.25Hz, the position of the system anti-feeding network flag is set, the air conditioner part is in normal use, and the photovoltaic power generation part is less than the power consumption of the air conditioner to ensure that the photovoltaic power generation is completely consumed by the air conditioner , unable to generate electricity to the grid. If it is detected that the grid frequency meets the reset condition of the anti-feed grid flag, it means that the grid has returned to normal use at this time, the air conditioner is in normal use at this time, and the photovoltaic power generation is not restricted, and can generate electricity to the grid at the maximum power.
在本公开一些实施例中,当空调部分未运行时,此时***为纯光伏发电状态,***检测到电网频率增加至某一限值时,例如检测到电网频率为52Hz时,***过欠频保护标志位置位,***报过欠频保护,光伏部分断开,光伏也不能向电网发电。检测到电网频率小于52Hz,过欠频保护标志位为1时,需要经过一定时间的保护期,如未到时间,***停机状态不恢复。如已经满足保护时间,***重新检测电网频率是否超过52Hz,如超过52Hz,***继续报出过欠频故障,继续停机,如不超过52Hz,***过欠频保护标志位复位。如此时电网频率大于频率限值2时,例如频率限值2为50.25Hz时,***进入发电功率限制状态,此时根据电网频率的大小来进行发电功率的控制,当电网频率恢复到50.25Hz以内时,***认为电网状态稳定,不再限制光伏空调***发电。In some embodiments of the present disclosure, when the air conditioning part is not running, the system is in a pure photovoltaic power generation state, and when the system detects that the grid frequency increases to a certain limit, for example, when the grid frequency is detected to be 52 Hz, the system is over-frequency and under-frequency When the protection flag is set, the system reports under-frequency protection, the photovoltaic part is disconnected, and the photovoltaic cannot generate electricity to the grid. When it is detected that the grid frequency is less than 52Hz, and the over-under-frequency protection flag is 1, a certain protection period needs to pass. If the time is not reached, the system shutdown state will not recover. If the protection time has been met, the system will re-detect whether the grid frequency exceeds 52Hz. If it exceeds 52Hz, the system will continue to report the over-under-frequency fault and continue to stop. If it does not exceed 52Hz, the system over-under-frequency protection flag will be reset. In this case, when the grid frequency is greater than the frequency limit 2, for example, when the frequency limit 2 is 50.25Hz, the system enters the power generation limit state. At this time, the power generation power is controlled according to the size of the grid frequency. When the grid frequency returns to within 50.25Hz When the power grid is considered stable, the system will no longer limit the power generation of the photovoltaic air conditioning system.
上述光伏设备控制方法,首先获取用电设备的工作状态,然后获取用电设备接入的交流电网的电网频率,当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率,其中,用电设备和交流电网均连接光伏设备。结合用电设备的工作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。The above photovoltaic equipment control method first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in the running state, the photovoltaic equipment is controlled. Stop feeding power to the AC grid. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment. By controlling the photovoltaic equipment in combination with the working state of the electrical equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
在本公开一些实施例中,提供一种光伏设备控制装置,包括工作状态获取模块、电网频率获取模块、第一控制模块和第二控制模块,工作状态获取模块用于获取用电设备的工作状态,工作状态包括运行状态和未运行状态,电网频率获取模块用于获取用电设备接入的交流电网的电网频率,第一控制模块用于当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,用电设备和交流电网均连接光伏设备,第二控制模块用于当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率。In some embodiments of the present disclosure, a photovoltaic equipment control device is provided, including a working state acquisition module, a grid frequency acquisition module, a first control module, and a second control module, where the working state acquisition module is used to obtain the working state of electrical equipment , the working state includes an operating state and a non-operating state, the grid frequency acquisition module is used to acquire the grid frequency of the AC grid connected to the electrical equipment, and the first control module is used when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in In the running state, the photovoltaic equipment is controlled to stop feeding power to the AC power grid, and both the electrical equipment and the AC power grid are connected to the photovoltaic equipment. Control photovoltaic equipment to reduce power generation.
在本公开一些实施例中,光伏设备控制装置还包括记录模块,记录模块用于在电网频率获取模块获取用电设备接入的交流电网的电网频率之后,当电网频率大于预设频率阈值时,记录电网频率异常状态。In some embodiments of the present disclosure, the photovoltaic device control apparatus further includes a recording module, the recording module is configured to, after the grid frequency acquisition module acquires the grid frequency of the AC grid connected to the electrical equipment, when the grid frequency is greater than a preset frequency threshold, Record the abnormal state of grid frequency.
上述光伏设备控制装置,首先获取用电设备的工作状态,然后获取用电设备接入的交流电网的电网频率,当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,当电网频率大于预设频率阈值,且用电设备处于未运行状态 时,控制光伏设备降低发电功率,其中,用电设备和交流电网均连接光伏设备。结合用电设备的工作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。The above photovoltaic equipment control device first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in the running state, the photovoltaic equipment is controlled. Stop feeding power to the AC grid. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment. By controlling the photovoltaic equipment in combination with the working state of the electrical equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
在本公开一些实施例中,提供一种光伏设备控制设备,包括控制装置、采样电路和检测器,采样电路连接交流电网,检测器连接用电设备,采样电路和检测器均连接控制装置,采样电路用于采集用电设备接入的交流电网的电网频率并发送至控制装置,检测器用于检测用电设备的工作状态并发送至控制装置,控制装置用于根据上述的方法进行光伏设备控制。In some embodiments of the present disclosure, a photovoltaic device control device is provided, including a control device, a sampling circuit and a detector, the sampling circuit is connected to an AC power grid, the detector is connected to electrical equipment, the sampling circuit and the detector are both connected to the control device, and the sampling circuit is connected to the control device. The circuit is used to collect the grid frequency of the AC power grid connected to the electrical equipment and send it to the control device, the detector is used to detect the working state of the electrical equipment and send it to the control device, and the control device is used to control the photovoltaic equipment according to the above method.
上述光伏设备控制设备,首先获取用电设备的工作状态,然后获取用电设备接入的交流电网的电网频率,当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率,其中,用电设备和交流电网均连接光伏设备。结合用电设备的工作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。The above photovoltaic equipment control equipment first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in the running state, the photovoltaic equipment is controlled. Stop feeding power to the AC grid. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the power generation, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment. By controlling the photovoltaic equipment in combination with the working state of the electrical equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
在本公开一些实施例中,提供一种光伏***,包括光伏设备、用电设备、交流电网和如上述的光伏设备控制设备,用电设备和交流电网均连接光伏设备,用电设备还连接交流电网。可以理解,光伏设备控制设备可以为与光伏设备、用电设备、交流电网相互独立的设备,也可以在光伏设备、用电设备、交流电网中已有的控制器上增加相应的功能,充当光伏设备控制设备使用。In some embodiments of the present disclosure, a photovoltaic system is provided, including photovoltaic equipment, electrical equipment, an AC power grid, and the above photovoltaic equipment control equipment, the electrical equipment and the AC power grid are both connected to the photovoltaic equipment, and the electrical equipment is also connected to the AC grid. It can be understood that the photovoltaic equipment control equipment can be independent of the photovoltaic equipment, electrical equipment, and AC power grid, or can add corresponding functions to the existing controllers in the photovoltaic equipment, electrical equipment, and AC power grid to act as photovoltaic equipment. Device control device usage.
在本公开一些实施例中,用电设备为空调。光伏设备为空调***提供光伏能量,光伏设备连接至DC/DC电路至直流母线部分,空调内机从直流母线取电,空调***不启动时,或光伏发电量大于空调***用电量时,光伏能量将通过双向AC/DC电路部分将能量传递至电网,空调外机优先从光伏侧取电,当光伏侧不发电的时候可以从交流电网侧取电,不影响空调的使用。In some embodiments of the present disclosure, the electrical device is an air conditioner. Photovoltaic equipment provides photovoltaic energy for the air-conditioning system. The photovoltaic equipment is connected to the DC/DC circuit to the DC bus, and the internal unit of the air conditioner draws power from the DC bus. When the air-conditioning system does not start, or when the photovoltaic power generation is greater than the power consumption of the air-conditioning system, the photovoltaic The energy will be transferred to the power grid through the bidirectional AC/DC circuit part, and the external unit of the air conditioner will take power from the photovoltaic side preferentially.
上述光伏***,首先获取用电设备的工作状态,然后获取用电设备接入的交流电网的电网频率,当电网频率大于预设频率阈值,且用电设备处于运行状态时,控制光伏设备停止向交流电网馈电,当电网频率大于预设频率阈值,且用电设备处于未运行状态时,控制光伏设备降低发电功率,其中,用电设备和交流电网均连接光伏设备。结合用电设备的工 作状态对光伏设备进行控制,可以合理利用光伏设备提供给用电设备的能量,避免光伏发电的浪费,在检测到电网频率大于预设频率阈值时,使光伏设备停止向交流电网馈电或降低发电功率,减小了光伏发电对电网不稳定的影响,使用可靠性高。The above photovoltaic system first obtains the working state of the electrical equipment, and then obtains the grid frequency of the AC power grid connected to the electrical equipment. When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in the running state, the photovoltaic equipment is controlled to stop sending to the grid. AC grid feeding, when the grid frequency is greater than the preset frequency threshold and the electrical equipment is not running, the photovoltaic equipment is controlled to reduce the generated power, wherein the electrical equipment and the AC grid are both connected to the photovoltaic equipment. Combining with the working state of the electrical equipment to control the photovoltaic equipment, the energy provided by the photovoltaic equipment to the electrical equipment can be reasonably used to avoid the waste of photovoltaic power generation. The grid feeds or reduces the power generation, which reduces the influence of photovoltaic power generation on the instability of the grid, and has high reliability.
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.
以上所述实施例仅表达了本公开的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对公开专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本公开构思的前提下,还可以做出若干变形和改进,这些都属于本公开的保护范围。因此,本公开的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent several embodiments of the present disclosure, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the disclosed patent. It should be noted that, for those skilled in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, which all belong to the protection scope of the present disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the appended claims.
Claims (12)
- 一种光伏设备控制方法,其特征在于,包括以下步骤:A method for controlling photovoltaic equipment, comprising the following steps:获取用电设备的工作状态;所述工作状态包括运行状态和未运行状态;Obtain the working state of the electrical equipment; the working state includes a running state and a non-running state;获取用电设备接入的交流电网的电网频率;Obtain the grid frequency of the AC grid connected to the electrical equipment;当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电;所述用电设备和所述交流电网均连接所述光伏设备;When the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop feeding power to the AC grid; both the electrical equipment and the AC grid are connected to the photovoltaic equipment ;当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率。When the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to reduce the generated power.
- 根据权利要求1所述的光伏设备控制方法,其特征在于,所述预设频率阈值包括第一频率阈值和第二频率阈值,所述第二频率阈值小于所述第一频率阈值;所述当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电,包括:The photovoltaic device control method according to claim 1, wherein the preset frequency threshold includes a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold; When the grid frequency is greater than a preset frequency threshold, and the electrical equipment is in a running state, controlling the photovoltaic equipment to stop feeding power to the AC grid, including:当所述电网频率大于所述第二频率阈值,小于或等于所述第一频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电。When the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
- 根据权利要求2所述的光伏设备控制方法,其特征在于,所述当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电,包括:The photovoltaic equipment control method according to claim 2, wherein when the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop feeding the AC grid. electricity, including:当所述电网频率大于所述第一频率阈值,且所述用电设备处于运行状态时,控制所述光伏设备停机。When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, the photovoltaic equipment is controlled to stop.
- 根据权利要求3所述的光伏设备控制方法,其特征在于,所述当所述电网频率大于所述第一频率阈值,且所述用电设备处于运行状态时,控制所述光伏设备停机之后,还包括:The photovoltaic equipment control method according to claim 3, wherein when the grid frequency is greater than the first frequency threshold and the electrical equipment is in a running state, after controlling the photovoltaic equipment to stop, Also includes:在所述光伏设备停机持续预设保护期后,返回所述获取用电设备接入的交流电网的电网频率。After the photovoltaic device is shut down for a preset protection period, the grid frequency of the AC grid connected to the acquired electrical device is returned.
- 根据权利要求1所述的光伏设备控制方法,其特征在于,所述预设频率阈值包括第一频率阈值和第二频率阈值,所述第二频率阈值小于所述第一频率阈值;所述当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率,包括:The photovoltaic device control method according to claim 1, wherein the preset frequency threshold includes a first frequency threshold and a second frequency threshold, and the second frequency threshold is smaller than the first frequency threshold; When the grid frequency is greater than the preset frequency threshold, and the electrical equipment is in a non-operational state, controlling the photovoltaic equipment to reduce the generated power, including:当所述电网频率大于所述第二频率阈值,小于或等于所述第一频率阈值,且所述用 电设备处于未运行状态时,控制所述光伏设备降低发电功率。When the grid frequency is greater than the second frequency threshold and less than or equal to the first frequency threshold, and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to reduce the generated power.
- 根据权利要求5所述的光伏设备控制方法,其特征在于,所述当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率,包括:The photovoltaic equipment control method according to claim 5, wherein when the grid frequency is greater than the preset frequency threshold and the electrical equipment is in a non-operational state, the photovoltaic equipment is controlled to reduce power generation power, including:当所述电网频率大于所述第一频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备停止向所述交流电网馈电。When the grid frequency is greater than the first frequency threshold and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to stop feeding power to the alternating current grid.
- 根据权利要求6所述的光伏设备控制方法,其特征在于,所述当所述电网频率大于所述第一频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备停止向所述交流电网馈电之后,还包括:The method for controlling photovoltaic equipment according to claim 6, wherein when the grid frequency is greater than the first frequency threshold and the electrical equipment is in a non-operating state, the photovoltaic equipment is controlled to stop sending power to the photovoltaic equipment. After the AC power grid is fed, it also includes:在所述光伏设备停止向所述交流电网馈电持续预设保护期后,返回所述获取用电设备接入的交流电网的电网频率。After the photovoltaic device stops feeding power to the AC grid for a preset protection period, returning to the obtained grid frequency of the AC grid connected to the electrical device.
- 根据权利要求1所述的光伏设备控制方法,其特征在于,所述获取用电设备接入的交流电网的电网频率之后,还包括:The method for controlling photovoltaic equipment according to claim 1, wherein after acquiring the grid frequency of the AC grid connected to the electrical equipment, the method further comprises:当所述电网频率大于预设频率阈值时,记录电网频率异常状态。When the grid frequency is greater than the preset frequency threshold, record the abnormal state of the grid frequency.
- 一种光伏设备控制装置,其特征在于,包括:A photovoltaic equipment control device, characterized in that it includes:工作状态获取模块,用于获取用电设备的工作状态;所述工作状态包括运行状态和未运行状态;a working state obtaining module, used to obtain the working state of the electrical equipment; the working state includes a running state and a non-running state;电网频率获取模块,用于获取用电设备接入的交流电网的电网频率;The grid frequency acquisition module is used to acquire the grid frequency of the AC grid connected to the electrical equipment;第一控制模块,用于当所述电网频率大于预设频率阈值,且所述用电设备处于运行状态时,控制光伏设备停止向所述交流电网馈电;所述用电设备和所述交流电网均连接所述光伏设备;a first control module, configured to control the photovoltaic equipment to stop feeding power to the AC power grid when the grid frequency is greater than a preset frequency threshold and the electrical equipment is in a running state; the electrical equipment and the AC The grid is connected to the photovoltaic equipment;第二控制模块,用于当所述电网频率大于所述预设频率阈值,且所述用电设备处于未运行状态时,控制所述光伏设备降低发电功率。A second control module, configured to control the photovoltaic device to reduce power generation when the grid frequency is greater than the preset frequency threshold and the electrical device is in a non-operating state.
- 一种光伏设备控制设备,其特征在于,包括控制装置、采样电路和检测器,所述采样电路连接交流电网,所述检测器连接所述用电设备,所述采样电路和所述检测器均连接所述控制装置,所述采样电路用于采集用电设备接入的交流电网的电网频率并发送至控制装置,所述检测器用于检测用电设备的工作状态并发送至控制装置,所述控制装置用于根据权利要求1-8任意一项所述的方法进行光伏设备控制。A photovoltaic equipment control device is characterized in that it includes a control device, a sampling circuit and a detector, the sampling circuit is connected to an AC power grid, the detector is connected to the electrical equipment, and both the sampling circuit and the detector are Connected to the control device, the sampling circuit is used to collect the grid frequency of the AC power grid connected to the electrical equipment and send it to the control device, the detector is used to detect the working state of the electrical equipment and send it to the control device, the The control device is used for controlling photovoltaic equipment according to the method of any one of claims 1-8.
- 一种光伏***,其特征在于,包括光伏设备、用电设备、交流电网和如权利要求10所述的光伏设备控制设备,所述用电设备和所述交流电网均连接所述光伏设备,所 述用电设备还连接所述交流电网。A photovoltaic system, characterized in that it includes photovoltaic equipment, electrical equipment, an alternating current grid, and a photovoltaic equipment control device according to claim 10 , wherein the electrical equipment and the alternating current grid are both connected to the photovoltaic equipment, and The electrical equipment is also connected to the AC power grid.
- 根据权利要求11所述的光伏***,其特征在于,所述用电设备为空调。The photovoltaic system according to claim 11, wherein the electrical equipment is an air conditioner.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010870647.5A CN111864806B (en) | 2020-08-26 | 2020-08-26 | Photovoltaic equipment control method, device and equipment and photovoltaic system |
CN202010870647.5 | 2020-08-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022041919A1 true WO2022041919A1 (en) | 2022-03-03 |
Family
ID=72968261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/098920 WO2022041919A1 (en) | 2020-08-26 | 2021-06-08 | Method, apparatus, and device for controlling photovoltaic device, and photovoltaic system |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN111864806B (en) |
WO (1) | WO2022041919A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111864806B (en) * | 2020-08-26 | 2021-11-30 | 珠海格力电器股份有限公司 | Photovoltaic equipment control method, device and equipment and photovoltaic system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130234518A1 (en) * | 2003-05-06 | 2013-09-12 | Enecsys Limited | Power Supply Circuits |
CN105826942A (en) * | 2015-01-07 | 2016-08-03 | 上海海事大学 | Grid-connected photovoltaic inverter MPPT control method capable of adjusting output power along with power grid frequency |
CN106571646A (en) * | 2016-09-30 | 2017-04-19 | 深圳市禾望电气股份有限公司 | Dynamic active power frequency modulation method and apparatus of photovoltaic power generation system |
CN106684924A (en) * | 2017-03-29 | 2017-05-17 | 阳光电源股份有限公司 | Electric energy control method and apparatus for photovoltaic system |
CN110401223A (en) * | 2019-07-31 | 2019-11-01 | 珠海格力电器股份有限公司 | Control method and control device of photovoltaic system and photovoltaic system |
CN111030159A (en) * | 2018-10-10 | 2020-04-17 | 中国电力科学研究院有限公司 | Photovoltaic virtual synchronous generator control method and system |
CN111864806A (en) * | 2020-08-26 | 2020-10-30 | 珠海格力电器股份有限公司 | Photovoltaic equipment control method, device and equipment and photovoltaic system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202019227U (en) * | 2010-11-30 | 2011-10-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Air conditioner and power supply system thereof |
CN104934999B (en) * | 2015-07-01 | 2017-11-14 | 国家电网公司 | Photovoltaic generation control method, device and photovoltaic generating system |
US10222083B2 (en) * | 2015-10-08 | 2019-03-05 | Johnson Controls Technology Company | Building control systems with optimization of equipment life cycle economic value while participating in IBDR and PBDR programs |
CN107104464A (en) * | 2016-02-22 | 2017-08-29 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner control device and method, photovoltaic air conditioner and power distribution system |
CN107968417A (en) * | 2017-12-20 | 2018-04-27 | 长沙理工大学 | A kind of three-phase two-stage type photovoltaic system participates in the control method for coordinating that mains frequency is adjusted |
CN109494768A (en) * | 2018-12-20 | 2019-03-19 | 国网青海省电力公司电力科学研究院 | Centralized photovoltaic plant and its control method, the control system for participating in power grid frequency modulation |
-
2020
- 2020-08-26 CN CN202010870647.5A patent/CN111864806B/en active Active
-
2021
- 2021-06-08 WO PCT/CN2021/098920 patent/WO2022041919A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130234518A1 (en) * | 2003-05-06 | 2013-09-12 | Enecsys Limited | Power Supply Circuits |
CN105826942A (en) * | 2015-01-07 | 2016-08-03 | 上海海事大学 | Grid-connected photovoltaic inverter MPPT control method capable of adjusting output power along with power grid frequency |
CN106571646A (en) * | 2016-09-30 | 2017-04-19 | 深圳市禾望电气股份有限公司 | Dynamic active power frequency modulation method and apparatus of photovoltaic power generation system |
CN106684924A (en) * | 2017-03-29 | 2017-05-17 | 阳光电源股份有限公司 | Electric energy control method and apparatus for photovoltaic system |
CN111030159A (en) * | 2018-10-10 | 2020-04-17 | 中国电力科学研究院有限公司 | Photovoltaic virtual synchronous generator control method and system |
CN110401223A (en) * | 2019-07-31 | 2019-11-01 | 珠海格力电器股份有限公司 | Control method and control device of photovoltaic system and photovoltaic system |
CN111864806A (en) * | 2020-08-26 | 2020-10-30 | 珠海格力电器股份有限公司 | Photovoltaic equipment control method, device and equipment and photovoltaic system |
Non-Patent Citations (1)
Title |
---|
CAI, YUE: "Discussion and Research of Photovoltaic Power Station Grid Connection and Dispatching Management", QINGHAI ELECTRIC POWER, vol. 30, no. 3, 30 September 2011 (2011-09-30), pages 4 - 7,11, XP055903589, ISSN: 1006--819 * |
Also Published As
Publication number | Publication date |
---|---|
CN111864806B (en) | 2021-11-30 |
CN111864806A (en) | 2020-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102237681B (en) | Control method and system for power consumption of home appliances and corresponding device | |
JP4724834B2 (en) | Power conversion device, system linkage distributed power generation system, and method of stopping grid linkage operation by a plurality of power conversion devices | |
WO2022041919A1 (en) | Method, apparatus, and device for controlling photovoltaic device, and photovoltaic system | |
CN211503145U (en) | Standby control device and air conditioner | |
CN110360064B (en) | Wind generating set control method and wind generating set | |
US9379602B2 (en) | Systems and methods for use in recovering a converter after grid fault event | |
WO2022199463A1 (en) | Fault diagnosis method and system for fuel cell stack | |
CN101943942A (en) | Electronic device with sleep function and method for wakening same | |
CN201274001Y (en) | Standby energy-saving apparatus for electric appliance | |
CN202171641U (en) | Carrier wave power supply monitoring module | |
WO2016035481A1 (en) | Power conditioner | |
CN111010533A (en) | Method and system for automatically reporting power supply and network connection state of AR camera | |
CN102810902B (en) | Household hybrid power supply management system and power supply management method | |
CN105204486A (en) | Control method for main circulating pump of water-cooling system | |
WO2024131045A1 (en) | Photovoltaic apparatus and method for increasing photovoltaic utilization rate of photovoltaic apparatus | |
CN109004673A (en) | A kind of subway Way of Regenerating Energy Feedback device DC voltage detection and control method | |
WO2012122953A1 (en) | Carrier frequency adjustment method, associated monitoring apparatus, base station and system | |
CN110597377A (en) | Power module control method and device and electric equipment | |
CN116827709A (en) | Control method, control device, electronic equipment and storage medium | |
CN113721108B (en) | Acquisition equipment, low-power consumption control method and transient wave recording type fault indicator | |
TWI453986B (en) | Fuel cell controll system | |
JP2013239403A (en) | Operation information management method of fuel cell system | |
CN207717938U (en) | A kind of system of the inverter digital independent analysis of photovoltaic power generation apparatus | |
CN113586364B (en) | Device, method and system for detecting yaw speed fault of fan yaw system | |
US9772859B2 (en) | Wake-up judgment apparatus for generator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21859763 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21859763 Country of ref document: EP Kind code of ref document: A1 |