CN113612272B - Charging control method and device for uninterruptible power supply of new energy power generation system - Google Patents
Charging control method and device for uninterruptible power supply of new energy power generation system Download PDFInfo
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- CN113612272B CN113612272B CN202110813065.8A CN202110813065A CN113612272B CN 113612272 B CN113612272 B CN 113612272B CN 202110813065 A CN202110813065 A CN 202110813065A CN 113612272 B CN113612272 B CN 113612272B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004146 energy storage Methods 0.000 claims abstract description 118
- 238000004364 calculation method Methods 0.000 claims description 37
- 238000004590 computer program Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 description 5
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Classifications
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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention is suitable for the technical field of uninterruptible power supplies, and provides a charging control method and device for an uninterruptible power supply of a new energy power generation system. The method comprises the following steps: obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining a charging parameter adjustment quantity of the energy storage device at the current moment based on surplus power at the current moment and energy storage device parameters; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, the charging parameters are adjusted in real time, so that the power generation power utilization rate of the new energy power generation system can be improved.
Description
Technical Field
The invention belongs to the technical field of uninterruptible power supplies, and particularly relates to a charging control method and device of an uninterruptible power supply for a new energy power generation system.
Background
At present, new energy power generation is an important source of electric energy in China, and in order to improve the power supply quality of a new energy power generation system, the new energy power generation system is generally matched with a UPS (Uninterruptible Power System, uninterrupted power supply) to be used. The energy storage device in the UPS system can store part of input electric energy as emergency use and improve the power supply quality when the electric energy is sufficient.
However, since the power generation amount of the new energy power generation system is unstable, the power entering the UPS system also changes in real time, for example, in the wind power system, the power generation power is affected by wind power, the wind power for power generation is unstable, and the energy generated by wind power generation also changes. How to store as much electric energy as possible while ensuring normal operation of the load so as to improve the utilization rate of the electric energy generated by the new energy source is still a current difficulty.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling charging of an uninterruptible power supply of a new energy power generation system, so as to solve the problem that it is difficult to increase the utilization rate of the new energy power generation electric energy.
A first aspect of an embodiment of the present invention provides a charging control method for an uninterruptible power supply of a new energy power generation system, including:
obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
determining the charging parameter adjustment quantity of the energy storage device at the current moment based on surplus power at the current moment and the energy storage device parameter;
and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment.
A second aspect of the embodiment of the present invention provides a charging control device for an uninterruptible power supply of a new energy power generation system, including:
the acquisition module is used for acquiring the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of the energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
the power calculation module is used for subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
the adjustment amount adjusting module is used for determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter;
and the parameter determining module is used for adjusting the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameter of the energy storage device at the next moment.
A third aspect of the embodiments of the present invention provides an uninterruptible power supply for implementing the steps of the method for controlling charging of an uninterruptible power supply of a new energy power generation system as described above.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method for controlling charging of an uninterruptible power supply of a new energy power generation system as described above.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a charging control method for an uninterruptible power supply of a new energy power generation system, which comprises the following steps: obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power input by the new energy power generation system into the uninterruptible power supply; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining a charging parameter adjustment quantity of the energy storage device at the current moment based on surplus power at the current moment and energy storage device parameters; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, through carrying out real-time quantitative calculation on the power generated by the new energy power generation system and the power used by the uninterruptible power supply, surplus electric quantity which is not charged into the energy storage device of the uninterruptible power supply at the current moment can be accurately obtained, so that the charging parameters at the next moment are changed, and the power generation utilization rate of the new energy power generation system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an implementation of a method for controlling charging of an uninterruptible power supply for a new energy power generation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an uninterruptible power supply according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging control device for an uninterruptible power supply of a new energy power generation system according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of an implementation method of the charging control method for the uninterruptible power supply of the new energy power generation system according to the embodiment of the invention is shown, and the detailed description is as follows:
step 101, obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system.
Referring to fig. 2, in this embodiment, the front end of the uninterruptible power supply is connected to the new energy power generation system, and is configured to obtain electric energy generated by the new energy power generation system; the rear end is connected with the load and is used for outputting part of electric energy acquired by the UPS to the load; the UPS also includes an energy storage device, which may be a battery, for storing a portion of the electrical energy captured by the UPS and outputting the stored electrical energy when necessary.
The maximum allowable power of the uninterruptible power supply at the current moment represents the maximum power which the uninterruptible power supply can obtain from the new energy power generation system, namely the active scheduling value of the new energy power generation system at the current moment. The maximum allowable power depends on the current carrying capacity of the device in the uninterruptible power supply. The input power of the uninterruptible power supply at the current moment represents the power actually obtained by the uninterruptible power supply from the new energy power generation system at the current moment, and is also equal to the sum of the power output to the load at the current moment and the power stored by the energy storage device.
The new energy power generation system in this embodiment may be a wind power system. Correspondingly, the front end of the uninterruptible power supply is connected with the wind power system and is used for acquiring electric energy emitted by the wind power system. In the power generation process of the wind power system, the power input into the uninterruptible power supply is equal to the sum of the load power and the charging power. If the power input into the uninterruptible power supply is lower than the power required by the load, the inverter output protection is caused; if the power input into the uninterruptible power supply is higher than the power required by the load, redundant electric energy is required to be stored in an energy storage device in the uninterruptible power supply, and the charging power is calculated at the moment, so that the charging mode with the maximum electric energy utilization rate can be determined, and the normal work of the load is ensured.
Step 102, subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment.
In this embodiment, the maximum allowable power at the current time minus the input power at the current time, the surplus power obtained represents the power available for charging the energy storage device that can be obtained by the UPS. The surplus power is stored in the energy storage device, so that the utilization rate of electric energy can be improved. If the surplus power at the current moment is not more than 0, the new energy power generation system is indicated that no surplus electric energy is supplied to the UPS load and the energy storage device at the current moment for storage.
And step 103, determining the adjustment quantity of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter.
In this embodiment, the energy storage device parameters are used to represent charging properties of the energy storage device, and the energy storage device parameters may include charging efficiency, maximum current, maximum voltage, and the like of the energy storage device; the charge parameter is used to represent a state of charge and a charge rate of the energy storage device. In order to store the surplus power in the energy storage device as much, quickly and safely as possible, a charge parameter adjustment of the energy storage device at the current time is determined on the basis of the surplus power at the current time and the energy storage device parameters.
And 104, adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment.
In this embodiment, since the power generation amounts of the new energy power generation system at each time may be different, in order to ensure the power utilization rate at each time, it is necessary to calculate the adjustment amounts of the charging parameters at each time in real time, and adjust the charging parameters of the energy storage device in real time. If the adjustment amount of the charging parameter at the current moment is not more than 0, the adjustment is not performed at the next moment.
Optionally, the charging parameter includes charging power; the energy storage device parameters include charging efficiency.
Determining a charge parameter adjustment amount of the energy storage device at the current time based on the surplus power at the current time and the energy storage device parameter includes:
calculating the charge power adjustment quantity of the energy storage device at the current moment based on the surplus power, the charge efficiency and a first adjustment quantity calculation formula at the current moment, wherein the first adjustment quantity calculation formula is as follows:
Charge_Cur_Add1＝Pη
the charge_cur_add1 represents a Charge power adjustment amount of the energy storage device at the current time, P represents surplus power at the current time, and η represents Charge efficiency.
In this embodiment, the charging efficiency represents the conversion efficiency of the energy storage device to the charging electric energy, and the surplus power is multiplied by the charging efficiency, and the obtained result represents the surplus power actually stored in the energy storage device at the current moment, that is, the charging power adjustment amount of the energy storage device.
Optionally, the charging parameter comprises a charging current; the energy storage device parameters include charging efficiency;
determining a charge parameter adjustment amount of the energy storage device at the current time based on the surplus power at the current time and the energy storage device parameter includes:
acquiring the charging voltage of the energy storage device at the current moment;
calculating a charging current adjustment amount based on a second adjustment amount calculation formula, the second adjustment amount calculation formula being:
wherein, charge_cur_ad2 represents the Charge current adjustment amount, P represents surplus power at the current time, η represents Charge efficiency, and u_bat represents the Charge voltage of the energy storage device at the current time.
In this embodiment, after the adjustment amount of the charging power of the energy storage device is determined, the adjustment amount of the charging current of the energy storage device may be further determined. Specifically, the charging current adjustment amount of the energy storage device at the charging voltage of the current moment is calculated based on the charging power adjustment amount of the energy storage device and the charging voltage of the energy storage device at the current moment. Then, when the charging voltage is unchanged, the charging current is adjusted, and the corresponding adjustment of the charging power can be realized.
Optionally, the step 101 includes:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting the active components of the three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein input_Power_Max represents the maximum allowable Power of the uninterruptible Power supply at the current moment, U 1 Representing the active input voltage of the uninterrupted power supply at the current moment, I 1 Indicating the maximum allowable current of the ups.
In this embodiment, the maximum allowable power of the uninterruptible power supply at the current time is the maximum allowable active power, and the maximum allowable power is determined based on the active input voltage of the uninterruptible power supply at the current time and the maximum allowable current of the uninterruptible power supply. The maximum allowable current of the ups is related to the internal components of the ups.
Optionally, obtaining the input power of the uninterruptible power supply at the current moment includes:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting active components of three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment to obtain an input current active component and an input voltage active component of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein input_Power_Curr represents the Input Power of the uninterruptible Power supply at the current moment, U 2 Representing the active component of the input voltage, I 2 Representing the active component of the input current.
In this embodiment, the input power of the uninterruptible power supply at the current moment is active power, and the input power is specifically determined based on the input active voltage and the input active current. Extracting the active components of the three-phase input current and the three-phase input voltage may include the steps of:
sequentially performing clark conversion and park conversion on three-phase input current to obtain an active component I of the input current d And input current reactive component I q ；
The three-phase input voltage is sequentially subjected to clark conversion and park conversion to obtain an active component U of the input voltage d And an input voltage reactive component U q 。
Optionally, before determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter of the uninterruptible power supply, the method further includes:
and subtracting the surplus power of the current moment by the surplus power of the guaranteed load operation to obtain the surplus power of the guaranteed load operation at the current moment.
Correspondingly, determining the charge parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises the following steps:
and determining the charging parameter adjustment quantity of the energy storage device at the current moment based on the surplus power of the guaranteed load operation at the current moment and the energy storage device parameter.
In this embodiment, a margin for ensuring the operation of the load is further provided, so as to ensure that the UPS can normally supply power to the load after adjusting the charging parameters of the energy storage device. The value of the margin for ensuring the load operation needs to be determined according to the actual situation. Accordingly, it is necessary to determine the charge parameter adjustment amount based on surplus power after subtracting the margin for ensuring the load operation.
As can be seen from the above, the charging control method for the uninterruptible power supply of the new energy power generation system provided by the invention comprises the following steps: obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power input by the new energy power generation system into the uninterruptible power supply; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining a charging parameter adjustment quantity of the energy storage device at the current moment based on surplus power at the current moment and energy storage device parameters; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, through carrying out real-time quantitative calculation on the power generated by the new energy power generation system and the power used by the uninterruptible power supply, surplus electric quantity which is not charged into the energy storage device of the uninterruptible power supply at the current moment can be accurately obtained, so that the charging parameters at the next moment are changed, and the power generation utilization rate of the new energy power generation system is improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 3 is a schematic structural diagram of a charging control device for an uninterruptible power supply of a new energy power generation system according to an embodiment of the present invention, and for convenience of explanation, only a portion related to the embodiment of the present invention is shown, and details are as follows:
as shown in fig. 3, the charging control device 3 for an uninterruptible power supply of a new energy power generation system includes:
the obtaining module 31 is configured to obtain a maximum allowable power and an input power of the uninterruptible power supply at a current time, and a charging parameter of an energy storage device in the uninterruptible power supply at the current time; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
the power calculation module 32 is configured to subtract the input power at the current time from the maximum allowable power at the current time to obtain surplus power at the current time;
an adjustment amount calculation module 33, configured to determine a charging parameter adjustment amount of the energy storage device at the current time based on the surplus power at the current time and the energy storage device parameter;
the parameter determining module 34 is configured to adjust a charging parameter of the energy storage device at a current time based on the charging parameter adjustment amount at the current time, so as to obtain a charging parameter of the energy storage device at a next time.
Optionally, the charging parameter includes charging power; the energy storage device parameters include charging efficiency;
the adjustment amount calculation module 33 is specifically configured to:
calculating the charge power adjustment quantity of the energy storage device at the current moment based on the surplus power, the charge efficiency and a first adjustment quantity calculation formula at the current moment, wherein the first adjustment quantity calculation formula is as follows:
Charge_Cur_Add1＝Pη
the charge_cur_add1 represents a Charge power adjustment amount of the energy storage device at the current time, P represents surplus power at the current time, and η represents Charge efficiency.
Optionally, the charging parameter comprises a charging current; the energy storage device parameters include charging efficiency;
the adjustment amount calculation module 33 is specifically configured to:
acquiring the charging voltage of the energy storage device at the current moment;
calculating a charging current adjustment amount based on surplus power at the current moment, charging efficiency, charging voltage of the energy storage device at the current moment and a second adjustment amount calculation formula, wherein the second adjustment amount calculation formula is as follows:
wherein, charge_cur_ad2 represents the Charge current adjustment amount, P represents surplus power at the current time, η represents Charge efficiency, and u_bat represents the Charge voltage of the energy storage device at the current time.
Optionally, the acquiring module is specifically configured to:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting the active components of the three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein input_Power_Max represents the maximum allowable Power of the uninterruptible Power supply at the current moment, U 1 Representing the active input voltage of the uninterrupted power supply at the current moment, I 1 Indicating the maximum allowable current of the ups.
Optionally, the obtaining module 31 is specifically configured to:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting active components of three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment to obtain an input current active component and an input voltage active component of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein input_Power_Curr represents the Input Power of the uninterruptible Power supply at the current moment, U 2 Representing the active component of the input voltage, I 2 Representing the active component of the input current.
Optionally, the power calculation module 32 is further configured to:
before determining the adjustment quantity of the charging parameters of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameters of the uninterruptible power supply, subtracting the surplus power of the guaranteed load operation at the current moment to obtain the surplus power of the guaranteed load operation at the current moment;
accordingly, the adjustment amount calculation module 33 is further configured to:
and determining the charging parameter adjustment quantity of the energy storage device at the current moment based on the surplus power of the guaranteed load operation at the current moment and the energy storage device parameter.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A charging control method of an uninterruptible power supply for a new energy power generation system is characterized by comprising the following steps:
obtaining the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system, and the charging parameters comprise charging power or charging current;
subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
determining a charging parameter adjustment amount of the energy storage device at the current moment based on surplus power at the current moment and energy storage device parameters, wherein the energy storage device parameters comprise charging efficiency;
adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameters of the energy storage device at the next moment; if the adjustment amount of the charging parameter at the current moment is not more than 0, the adjustment is not performed at the next moment.
2. The method of charging control for an uninterruptible power supply of a new energy power generation system according to claim 1, wherein the charging parameters include charging power;
the determining the charge parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises the following steps:
calculating the charge power adjustment quantity of the energy storage device at the current moment based on surplus power, charge efficiency and a first adjustment quantity calculation formula at the current moment, wherein the first adjustment quantity calculation formula is as follows:
Ch_Cur_Add1＝Pη
wherein ch_cur_add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents the charging efficiency.
3. The method of claim 1, wherein the charging parameters include a charging current;
the determining the charge parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises the following steps:
acquiring the charging voltage of the energy storage device at the current moment;
calculating a charging current adjustment amount based on surplus power, charging efficiency at the current moment, charging voltage of the energy storage device at the current moment and a second adjustment amount calculation formula, wherein the second adjustment amount calculation formula is as follows:
wherein ch_cur_ad2 represents the charge current adjustment amount, P represents surplus power at the current time, η represents the charge efficiency, and u_bat represents the charge voltage of the energy storage device at the current time.
4. A method of controlling charging of an uninterruptible power supply for a new energy power generation system according to any one of claims 1 to 3, wherein the obtaining the maximum allowable power of the uninterruptible power supply at the current time includes:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting the active components of the three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein input_Power_Max represents the maximum allowable Power of the uninterruptible Power supply at the current moment, U 1 Representing the active input voltage of the uninterrupted power supply at the current moment, I 1 Representing the maximum allowable current of the uninterruptible power supply.
5. A method of controlling charging of an uninterruptible power supply for a new energy power generation system according to any one of claims 1 to 3, wherein obtaining input power of the uninterruptible power supply at a current time includes:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting the active components of the three-phase input current and the three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active components of the input current and the input voltage of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein input_Power_Curr represents the Input Power of the uninterruptible Power supply at the current moment, U 2 Representing the active component of the input voltage, I 2 Representing the active component of the input current.
6. A method of charging control for an uninterruptible power supply of a new energy power generation system according to any one of claims 1 to 3, wherein before determining the amount of adjustment of the charging parameter of the energy storage device at the current time based on surplus power at the current time and the energy storage device parameter of the uninterruptible power supply, the method further comprises:
subtracting the surplus power of the current moment from the surplus power of the guaranteed load operation to obtain the surplus power of the guaranteed load operation at the current moment;
correspondingly, the determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises the following steps:
and determining the charging parameter adjustment quantity of the energy storage device at the current moment based on the surplus power of the guaranteed load operation at the current moment and the energy storage device parameter.
7. A charging control device for an uninterruptible power supply of a new energy power generation system, comprising:
the acquisition module is used for acquiring the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of the energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system, and the charging parameters comprise charging power or charging current;
the power calculation module is used for subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
the adjustment amount calculation module is used for determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on surplus power at the current moment and the energy storage device parameter, wherein the energy storage device parameter comprises charging efficiency;
the parameter determining module is used for adjusting the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment quantity at the current moment to obtain the charging parameter of the energy storage device at the next moment; if the adjustment amount of the charging parameter at the current moment is not more than 0, the adjustment is not performed at the next moment.
8. The charging control device for an uninterruptible power supply of a new energy power generation system according to claim 7, wherein the charging parameters include charging power;
the adjustment amount calculating module is specifically configured to:
calculating the charge power adjustment quantity of the energy storage device at the current moment based on surplus power, charge efficiency and a first adjustment quantity calculation formula at the current moment, wherein the first adjustment quantity calculation formula is as follows:
Ch_Cur_Add1＝Pη
wherein ch_cur_add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents the charging efficiency.
9. Uninterruptible power supply, characterized in that it is adapted to implement the steps of the method for controlling the charging of uninterruptible power supplies for new energy power generation systems according to any one of claims 1 to 6.
10. A computer-readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method for controlling charging of an uninterruptible power supply for a new energy power generation system according to any one of claims 1 to 6.
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| CN202110813065.8A CN113612272B (en) | 2021-07-19 | 2021-07-19 | Charging control method and device for uninterruptible power supply of new energy power generation system |
| PCT/CN2021/135654 WO2023000581A1 (en) | 2021-07-19 | 2021-12-06 | Charging control method and device for uninterruptible power supply for new energy power generation system |
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| CN116111714B (en) * | 2023-04-11 | 2023-07-07 | 浙江德塔森特数据技术有限公司 | Uninterruptible power supply, control method and device thereof and readable medium |
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