CN216872927U - Intelligent photovoltaic power generation pumping system with self-adaptive power - Google Patents
Intelligent photovoltaic power generation pumping system with self-adaptive power Download PDFInfo
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Abstract
The utility model discloses a power self-adaptive intelligent photovoltaic power generation pumping system which comprises a photovoltaic cell, a solar energy and electricity collection module, a motor control module, a storage battery, a current sampling device and a pumping device, wherein the photovoltaic cell is used for converting solar energy into electric energy; the solar energy electricity collection module is used for completing the electric energy collection functions of maximum power output and boosting of the electric energy output by the photovoltaic cell; and storing the collected electric energy in a storage battery; the storage battery is used for finishing the functions of electric energy storage and buffering; the current sampling device is used for completing the charging and discharging current sampling function of the storage battery; the motor control module is used for converting input electric energy transmitted by the solar energy and electricity collection module into output electric energy with proper power so as to drive the water pumping device to act; the water pumping device is used for completing the water pumping function under the control of the motor control module. The intelligent photovoltaic power generation pumping system with the self-adaptive power is convenient and quick to install, good in mobility and low in energy cost.
Description
Technical Field
The utility model relates to the technical field of photovoltaic power generation pumping systems, and particularly discloses an intelligent photovoltaic power generation pumping system with self-adaptive power.
Background
The photovoltaic power generation pumping system is a device which converts solar energy into electric energy and drives a pumping motor to pump water by the electric energy. The electric energy output by the photovoltaic cell is converted into a power supply matched with the water pumping motor through an electric energy conversion device consisting of power electronic devices, and the water pumping motor is driven to work.
The existing photovoltaic power generation pumping system has the defects in the following aspects:
1. the adaptability to the environment is not strong, and the system can not work normally when the illumination intensity is low;
2. energy caching and collection are not considered, and the solar energy utilization rate is not high;
3. the self-adaptability to the output power of the photovoltaic cell and the power of the water pumping motor is not strong, and when the output power of the photovoltaic cell is smaller than the power of the water pumping motor, the system cannot work normally;
5. the photovoltaic cell module with enough high power is required, and the number of photovoltaic cell panels required to be installed when the power of the water pumping motor is high is large;
6. the photovoltaic cell cannot be operated in its Maximum Power Point Tracking (MPPT) state throughout.
Therefore, the above-mentioned defects of the existing photovoltaic power generation pumping system are a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power self-adaptive intelligent photovoltaic power generation pumping system, and aims to solve the technical problem of the defects of the existing photovoltaic power generation pumping system.
The utility model relates to a power self-adaptive intelligent photovoltaic power generation pumping system, which comprises a photovoltaic cell, a solar energy electricity collection module, a motor control module, a storage battery, a current sampling device and a pumping device, wherein,
a photovoltaic cell for converting solar energy into electrical energy;
the solar energy electricity collection module is respectively electrically connected with the photovoltaic cell and the storage battery and is used for finishing the functions of outputting the maximum power of the electric energy output by the photovoltaic cell and collecting the boosted electric energy; and storing the collected electric energy in a storage battery;
the storage battery is electrically connected with the solar energy and electricity collection module and is used for finishing the functions of storing and buffering electric energy;
the current sampling device is used for completing the charging and discharging current sampling function of the storage battery;
the motor control module is respectively electrically connected with the current sampling device, the solar energy electricity collecting module and the water pumping device and is used for converting input electric energy transmitted by the solar energy electricity collecting module into output electric energy with proper power so as to drive the water pumping device to act;
the water pumping device is electrically connected with the motor control module and is used for completing the water pumping function under the control of the motor control module.
Further, the solar power collecting module includes a first analog-to-digital converter, a second analog-to-digital converter, a third analog-to-digital converter, and a first digital controller, wherein,
the first analog-to-digital converter is electrically connected with the photovoltaic cell and used for converting the output voltage of the photovoltaic cell into a photovoltaic cell output voltage sampling analog-to-digital conversion value;
the second analog-to-digital converter is electrically connected with the photovoltaic cell and used for converting the output current of the photovoltaic cell into a photovoltaic cell output current sampling analog-to-digital conversion value;
the first digital controller is respectively electrically connected with the first analog-to-digital converter, the second analog-to-digital converter and the third analog-to-digital converter, and is used for receiving a photovoltaic cell output voltage sampling analog-to-digital conversion value converted by the first analog-to-digital converter and a photovoltaic cell output current sampling analog-to-digital conversion value converted by the second analog-to-digital converter and transmitting an output solar energy electricity collection module voltage sampling analog-to-digital conversion value to the third analog-to-digital converter;
the third analog-to-digital converter is electrically connected with the first digital controller and used for converting the voltage sampling analog-to-digital conversion value of the solar energy electricity collection module output by the first digital controller into the output voltage of the solar energy electricity collection module.
Furthermore, the solar electricity collection module further comprises a current-limiting lamp, a relay and a first switch circuit, the current-limiting lamp is connected in series with the output voltage end of the photovoltaic cell and the output voltage end of the solar electricity collection module, and the first digital controller is electrically connected with the relay, the current-limiting lamp and the first switch circuit respectively and used for controlling the on or off of the relay, the current-limiting lamp and the first switch circuit.
Furthermore, the solar energy electricity collection module also comprises a boosting inductor and a one-way isolating diode, wherein the boosting inductor is divided into two paths, one path of the boosting inductor is connected with the anode of the one-way isolating diode, and the other path of the boosting inductor is connected with the first switch circuit.
Furthermore, the solar energy electricity collection module also comprises a current sampling resistor, and the current sampling resistor is connected with the second analog-to-digital converter in series.
Further, the motor control module further comprises a first driving circuit, and the first driving circuit is connected between the first switching circuit and the first digital controller.
Further, the first switch circuit adopts a MOS switch tube.
Further, the motor control module comprises a fourth analog-to-digital converter, a fifth analog-to-digital converter, a sixth analog-to-digital converter and a second digital controller,
the fourth analog-to-digital converter is electrically connected with the storage battery and used for converting the input direct-current voltage from the storage battery into a storage battery voltage sampling analog-to-digital conversion value;
the fifth analog-to-digital converter is electrically connected with the storage battery and is used for converting the charge and discharge current of the storage battery into a storage battery charge and discharge current sampling analog-to-digital conversion value;
the second digital controller is respectively electrically connected with the fourth analog-to-digital converter, the fifth analog-to-digital converter and the sixth analog-to-digital converter, and is used for receiving a storage battery voltage sampling analog-to-digital conversion value converted by the fourth analog-to-digital converter and a storage battery charging and discharging current sampling analog-to-digital conversion value converted by the fifth analog-to-digital converter, and transmitting an output storage battery current sampling analog-to-digital conversion value to the sixth analog-to-digital converter;
and the sixth analog-to-digital converter is electrically connected with the second digital controller and is used for converting the storage battery current sampling analog-to-digital conversion value output by the second digital controller into the motor output voltage.
Furthermore, the motor control module also comprises an inverter bridge circuit, a second switch circuit, a second drive circuit and a buffer circuit, wherein the buffer circuit is connected with the input end of the second switch circuit, and the output end of the second switch circuit is electrically connected with the second digital controller through the second drive circuit; the inverter bridge circuit is electrically connected with the storage battery and is used for converting the direct-current voltage input by the storage battery into output voltage with controllable power and polarity; the second digital controller is respectively electrically connected with the inverter bridge circuit, the second switch circuit and the water pumping device and is used for receiving the power converted by the inverter bridge circuit and the output voltage with controllable polarity, controlling the second switch circuit to act and completing the control function of the water pumping device.
Furthermore, the water pumping device comprises a water pumping motor and a water pump assembly connected with the water pumping motor, wherein the water pumping motor comprises a direct current motor and/or an alternating current motor; the current sampling device adopts a current Hall.
The beneficial effects obtained by the utility model are as follows:
the utility model provides a power self-adaptive intelligent photovoltaic power generation pumping system, which adopts a photovoltaic cell, a solar energy and electricity collection module, a motor control module, a storage battery, a current sampling device and a pumping device, wherein the photovoltaic cell is used for converting solar energy into electric energy; the solar energy electricity collection module is used for completing the electric energy collection functions of maximum power output and boosting of the electric energy output by the photovoltaic cell; and storing the collected electric energy in a storage battery; the storage battery is used for finishing the functions of electric energy storage and buffering; the current sampling device is used for completing the charging and discharging current sampling function of the storage battery; the motor control module is used for converting input electric energy transmitted by the solar energy and electricity collection module into output electric energy with proper power so as to drive the water pumping device to act; the water pumping device is used for completing the water pumping function under the control of the motor control module.
Compared with the traditional water pumping system, the intelligent photovoltaic power generation water pumping system with self-adaptive power has the following benefits that:
the device is suitable for any occasions with illumination, and is convenient and quick to install, good in mobility and low in energy cost.
And secondly, the requirement on system configuration is low, and the equipment scale is small. The photovoltaic cell board power configuration scope is wide, and the usable power range of the motor that draws water is wide, and the alternating current-direct current type is all available.
And thirdly, with the help of the energy storage battery, the low-power photovoltaic cell assembly can be used for driving the high-power water pumping motor, and the application range is wide.
And fourthly, the solar energy electricity collection module is independent of the motor control module, the system configuration can be flexibly matched, and the system is convenient to maintain and update.
Fifthly, the solar energy electricity collection module has the maximum power output MPPT control function of the photovoltaic cell, and the solar energy utilization rate is high; the current limiting function of the output current of the photovoltaic cell is achieved, and the power generation capacity and the application performance of the photovoltaic cell are improved.
Sixthly, the motor control module is flexible and controllable and can output alternating current or direct current electric energy with self-adaptive power regulation; the controller monitors the safety state and the health state of the energy storage battery, and can optimize the comprehensive performance of the storage battery under the condition of ensuring the water pumping function.
And seventhly, the light emitting of the current-limiting lamp enhances the illumination intensity of the photovoltaic cell, the power generation capacity of the photovoltaic cell is improved, and the solar energy utilization rate is further improved.
Drawings
FIG. 1 is a functional block diagram of an embodiment of a power self-adaptive intelligent photovoltaic power generation pumping system provided by the present invention;
FIG. 2 is a schematic circuit diagram of one embodiment of the solar power collection module shown in FIG. 1;
fig. 3 is a schematic circuit diagram of an embodiment of the solar power collecting module shown in fig. 1.
The reference numbers illustrate:
10. a photovoltaic cell; 20. a solar electricity collection module; 30. a motor control module; 40. a storage battery; 50. a current sampling device; 60. a water pumping device.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a power adaptive intelligent photovoltaic power generation pumping system, which includes a photovoltaic cell 10, a solar energy and electricity collecting module 20, a motor control module 30, a storage battery 40, a current sampling device 50, and a pumping device 60, wherein the photovoltaic cell 10 is configured to convert solar energy into electric energy; the solar energy electricity collecting module 20 is respectively electrically connected with the photovoltaic cell 10 and the storage battery 40, and is used for completing the electric energy collecting functions of outputting the maximum power of the electric energy output by the photovoltaic cell 10 and boosting; and stores the collected electric energy in the storage battery 40; the storage battery 40 is electrically connected with the solar electricity collecting module 20 and is used for completing the functions of electric energy storage and buffering; the current sampling device 50 is used for completing the charging and discharging current sampling function of the storage battery 40; the motor control module 30 is electrically connected with the current sampling device 50, the solar energy and electricity collecting module 20 and the water pumping device 60 respectively, and is used for converting the input electric energy transmitted by the solar energy and electricity collecting module 20 into output electric energy with proper power to drive the water pumping device 60 to act; the water pumping device 60 is electrically connected to the motor control module 30, and is configured to perform a water pumping function under the control of the motor control module 30. In this embodiment, the water pumping device 60 includes a water pumping motor and a water pump assembly connected to the water pumping motor, and the water pumping motor includes a dc motor and/or an ac motor; the current sampling device 50 employs a current hall H.
In the above structure, please refer to fig. 2, and fig. 2 is a schematic circuit diagram of an embodiment of the solar energy collection module shown in fig. 1, in this embodiment, the solar energy collection module 20 includes a first analog-to-digital converter, a second analog-to-digital converter, a third analog-to-digital converter and a first digital controller, wherein the first analog-to-digital converter is electrically connected to the photovoltaic cell 10 and is used for connecting the output voltage u of the photovoltaic cell 10b(t) conversion to photovoltaic cell output voltage sampling analog-to-digital conversion value ub(k) (ii) a A second analog-to-digital converter is electrically connected to the photovoltaic cell 10 for the output current i of the photovoltaic cell 10b(t) conversion to photovoltaic cell output current sampling analog-to-digital conversion value ib(k) (ii) a The first digital controller is respectively electrically connected with the first analog-to-digital converter, the second analog-to-digital converter and the third analog-to-digital converter and is used for receiving the photovoltaic cell output voltage sampling analog-to-digital conversion value u converted by the first analog-to-digital converterb(k) And a photovoltaic cell output current sampling analog-to-digital conversion value i converted by the second analog-to-digital converterb(k) And sampling the output voltage of the solar energy electricity collection module by an analog-to-digital conversion value uc(k) To a third analog-to-digital converter; the third analog-to-digital converter is electrically connected with the first digital controller and is used for converting the voltage sampling analog-to-digital conversion value of the solar energy electricity collection module output by the first digital controller into uc(k) Output voltage u for solar energy electricity collection modulec(t) of (d). Further, the solar power collecting module 20 further includes a current limiting lamp RxRelay K, first switch circuit and current-limiting lamp RxIs connected in series to the output voltage terminal u of the photovoltaic cell 10b(t) and the output voltage terminal u of the solar power collecting module 20c(t), the first digital controller is respectively connected with the relay K and the current-limiting lamp RxIs electrically connected with the first switch circuit and is used for controlling the relay K and the current-limiting lamp RxAnd the first switch circuit is turned on or off. In this embodiment, the current limiting lamp K has a snoot. The solar energy electricity collecting module 20 further includes a boost inductor L and a unidirectional isolation diode D, the boost inductor is divided into two paths, one path is connected with the anode of the unidirectional isolation diode D, and the other path is connected with the first switch circuit. The solar power collecting module 20 further comprises a current sampling resistor RsCurrent sampling resistor RsAnd is connected in series with the second analog-to-digital converter. The motor control module 30 further includes a first driving circuit Drive, and the first driving circuit Drive is connected between the first switch circuit and the first digital controller. Preferably, in this embodiment, the first switch circuit employs a MOS switch Q. The intelligent photovoltaic power generation pumping system with self-adaptive power provided by the embodiment adopts solar energy to collect electricityThe module 20 completes the functions of outputting the maximum power of the electric energy output by the photovoltaic cell 10 and collecting the boosted electric energy, and the degree of automation is high; the light emitting of the current limiting lamp K enhances the illumination intensity of the photovoltaic cell 10, the power generation capacity of the photovoltaic cell 10 is improved, and the solar energy utilization rate is further improved.
Further, referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of the solar energy collection module shown in fig. 1, in this embodiment, the motor control module 30 includes a fourth analog-to-digital converter, a fifth analog-to-digital converter, a sixth analog-to-digital converter and a second digital controller, the fourth analog-to-digital converter is electrically connected to the storage battery 40 and is configured to convert an input direct current voltage uc (t) from the storage battery 40 into a storage battery voltage sampling analog-to-digital conversion value uc (k); the fifth analog-to-digital converter is electrically connected with the storage battery 40 and is used for converting the charging and discharging current ic (t) of the storage battery 40 into a storage battery charging and discharging current sampling analog-to-digital conversion value ic (k); the second digital controller is respectively electrically connected with the fourth analog-to-digital converter, the fifth analog-to-digital converter and the sixth analog-to-digital converter, and is used for receiving a storage battery voltage sampling analog-to-digital conversion value uc (k) converted by the fourth analog-to-digital converter and a storage battery charging and discharging current sampling analog-to-digital conversion value ic (k) converted by the fifth analog-to-digital converter, and transmitting an output storage battery current sampling analog-to-digital conversion value id (k) to the sixth analog-to-digital converter; the sixth analog-to-digital converter is electrically connected with the second digital controller and is used for converting the storage battery current sampling analog-to-digital conversion value id (k) output by the second digital controller into the motor output voltage ud (t). Further, the motor control module 30 further includes an inverter bridge circuit, a second switch circuit, a second driving circuit and a buffer circuit, the buffer circuit is connected to an input terminal of the second switch circuit, and an output terminal of the second switch circuit is electrically connected to the second digital controller through the second driving circuit; the inverter bridge circuit is electrically connected with the storage battery 40 and is used for converting the direct-current voltage input by the storage battery 40 into output voltage with controllable power and polarity; the second digital controller is respectively electrically connected with the inverter bridge circuit, the second switch circuit and the water pumping device 60, and is used for receiving the power and the output voltage with controllable polarity converted by the inverter bridge circuit, controlling the second switch circuit to act and completing the control function of the water pumping device 60. The power self-adaptive intelligent photovoltaic power generation pumping system provided by the embodiment adopts the motor control module 30 to complete the control function of the pumping device 60, has high automation degree, and can output alternating current or direct current electric energy with self-adaptive power regulation.
As shown in fig. 1 to fig. 3, the power self-adaptive intelligent photovoltaic power generation pumping system provided by this embodiment has the following working principle:
the power self-adaptive intelligent photovoltaic power generation water pumping system is composed of a photovoltaic cell 10, a solar energy electricity collection module 20, a motor control module 30, a storage battery 40, a water pumping device 60 and a current sampling device 50, and is shown in a block diagram in fig. 1. The water pumping device 60 employs a water pumping motor and pump assembly. The current sampling device 50 employs a current hall H. The photovoltaic cell 10 converts solar energy into electrical energy and has 2 electrical energy output terminals. The solar energy electricity collecting module 20 performs the electricity collecting function of outputting the maximum power of the electric energy output by the photovoltaic cell and boosting the voltage, and stores the collected electric energy in the storage battery 40. The solar electricity collection module 20 has 2 power input terminals and 2 power output terminals. The motor control module 30 converts the input electric energy with uncertain power into output electric energy with proper power to drive the pumping motor, and has 2 electric energy input terminals, 2 electric energy output terminals and 1 current hall signal input terminal for power self-adaptation. The battery 40 performs electrical energy storage and buffering functions. The water pumping motor and the water pump assembly complete the water pumping function. The current hall H performs a charge-discharge current sampling function of the battery 40.
The working principle diagram of the solar energy electricity collecting module is shown in figure 2. In the figure, Rx is a current-limiting lamp with a light-gathering cover, K is a relay, L is a boosting inductor, D is a one-way isolating diode, Q is an MOS switching tube, Rs is a current sampling resistor with extremely small resistance, A/D is an analog-digital converter, Driver is an MOS tube driving circuit, and a first digital controller is a microcontroller for completing the solar maximum power electricity collection function; u. ofb(t) is the output voltage of the photovoltaic cell, ib(t) is the photovoltaic cell output current, uc(t) is the output voltage of the solar electricity collection module; u. ofb(k) Sampling of the analog-to-digital conversion value, i, for the output voltage of a photovoltaic cellb(k) Output current sampling die for photovoltaic cellNumber of converted values, uc(k) And sampling an analog-to-digital conversion value for the output voltage of the solar energy electricity collection module.
The relay K controls the access or bypass of the current-limiting lamp Rx, and the first digital controller controls the current-limiting lamp Rx according to the output voltage u of the photovoltaic cellb(k) And an output current ib(k) Estimating the equivalent electromotive force epsilon (K) and the equivalent internal resistance r (K) of the photovoltaic cell, calculating the due MPPT current value iMPPT (K) when the photovoltaic cell is in maximum power output, and estimating the maximum possible value i of the output current of the photovoltaic cell when the switching tube Q is switched off and the relay K is switched onbM-OFF (k). When i isbWhen M-OFF (K) is larger than iMPPT (K), the first digital controller controls the relay K to be switched off, and the current limiting lamp Rx is connected into the circuit to limit the output current of the photovoltaic cell so as to avoid the influence of the excessive internal heat generation of the photovoltaic cell on the power generation capacity of the photovoltaic cell caused by the excessive output current of the photovoltaic cell; meanwhile, the light emitted by the current-limiting lamp Rx irradiates the photovoltaic cell assembly through the condensing hood, so that the power generation capacity of the photovoltaic cell is enhanced. When i isbAnd when M-OFF (K) is not more than iMPPT (K), the digital controller controls the relay K to be closed, bypasses the current-limiting lamp Rx to exit the collecting circuit, and prepares for the electricity collecting module to enter a boosting energy storage working state.
When the voltage u of the batteryc(k) When the relay K is disconnected due to low voltage, the current-limiting lamp Rx is connected to the collecting circuit; when the voltage u of the batteryc(k) When the relay K is closed due to high voltage, the current-limiting lamp Rx exits from the collecting circuit. When the photovoltaic cell outputs a current ib(k) When the output current is less than the maximum power output current iMPPT (k) of the photovoltaic cell, the digital controller controls the switch tube Q to be conducted, and the photovoltaic cell outputs current ib(k) Increase magnetic field energy of the inductor L
) Increasing; when the photovoltaic cell outputs a current ib(k) When the output current iMPPT (k) is increased to be larger than the maximum power output current iMPPT (k) of the photovoltaic cell, the digital controller controls the switch tube Q to be switched off, the output current ib (k) of the photovoltaic cell is reduced, and the magnetic field in the inductor L can be dumped into the storage battery at the output end through the one-way isolating diode D. With photovoltaic cell output current ib(k) Increase in circulation ofAnd reducing, the switching tube Q is circularly switched on/off, so that the output current of the photovoltaic cell is forced to fluctuate around iMPPT (k), and the maximum output power control of the photovoltaic cell is realized. The output electric energy of the photovoltaic cell controlled according to the maximum power output is continuously collected in the storage battery, and the voltage of the storage battery is increased along with the increase of the stored energy and can be increased to the voltage-limiting protection value of the storage battery.
The schematic diagram of the motor control module operation is shown in fig. 3. In the figure Q1～Q4Is a MOS switching tube, D1～D4Is a freewheeling diode, R1～R4To buffer the resistance, C1～C4For buffer capacitor, H and H1 are current Hall, A/D is analog-to-digital converter, and "Driver 1" - "Driver M" is MOS transistor Q1～Q4The "second digital controller" is a microcontroller that performs motor control functions; u. uc(t) is the input voltage from the battery, ic(t) is the battery charging and discharging current, ud(t) output voltage to the motor, id(t) is the motor current, uc(k) Sampling the analog-to-digital conversion value, i, for the battery voltagec(k) Sampling the analog-to-digital conversion value u for the charging and discharging current of the storage batteryd(k) Sampling the analog-to-digital conversion value, i, for the motor voltagedAnd (t) is a motor current sampling analog-to-digital conversion value. Q1～Q4Forming an inverter bridge, and inputting a DC voltage uc(t) conversion success rate and polarity controllable output voltage ud(t) driving the water pumping motor, ud(t) may be AC to drive an AC motor (Q)1～Q4Working in inverter bridge state), or DC or chopped DC to drive DC motor (Q)1And Q4Working or Q2And Q3Work); (R)1、C1、D1)～(R4、C4、D4) Respectively form a switch tube Q1～Q4The buffer circuit of (1).
In order to utilize solar energy as much as possible, pump water as much as possible and simultaneously consider the operation of a water pumping system and the safety and the reliability of equipment, the second digital controller is used for controlling the water pumping system according to the voltage u of the storage batteryc(t), battery charging and discharging current ic (t), motor DCCurrent/ac type and motor current idAnd (t) controlling the working mode and the working state of the inverter bridge. The water pumping system can work in a continuous water pumping mode, an intermittent water pumping mode and a power self-adaptive regulation water pumping mode. When the output power of the photovoltaic cell is insufficient to drive the water pumping motor, the water pumping system works in an intermittent water pumping mode, and the energy is stored firstly and then the water is pumped; when the output power of the photovoltaic cell basically reaches the rated power of the water pumping motor, the water pumping system works in a continuous water pumping mode; when the output power of the photovoltaic cell is higher than the requirement of the minimum driving power of the water pumping motor and continuous water pumping is needed, the water pumping system works in a water pumping mode with self-adaptive power adjustment. In addition, the comprehensive performance optimization of the storage battery is considered at the same time.
When the voltage of the storage battery is lower than a certain threshold value and is not enough to drive the water pumping motor, the second digital controller controls the switch tube Q1～Q4And when the storage battery is stored energy enough to drive the water pumping motor, the water pumping is restarted.
When the voltage of the storage battery is higher than a certain threshold value and is enough to drive the water pumping motor to operate for a long enough time (avoiding frequent starting and stopping of the water pumping motor), the second digital controller controls the inverter bridge to output alternating current voltage or direct current voltage to drive the water pumping motor to start water pumping. When the inverter bridge works, the digital controller estimates the safety state of the storage battery according to the voltage and the current of the storage battery, determines the optimal charging and discharging current under the condition of optimizing the performance of the storage battery, and then adjusts and controls the PWM width of the pulse of the inverter switching tube according to the optimal charging and discharging current of the storage battery and the power requirement of the motor, so that the power of the water pumping system is adjusted in a self-adaptive mode, and the overall performance of the system is optimized.
The intelligent photovoltaic power generation water pumping system with the self-adaptive power can work in a continuous water pumping mode when the output power of the photovoltaic cell meets the power of a water pumping motor, and work in an intermittent water pumping mode of energy storage-water pumping-energy storage when the output power of the photovoltaic cell cannot meet the power of the water pumping motor.
Compared with the prior art, the power self-adaptive intelligent photovoltaic power generation pumping system provided by the embodiment adopts a photovoltaic cell, a solar energy and electricity collection module, a motor control module, a storage battery, a current sampling device and a pumping device, wherein the photovoltaic cell is used for converting solar energy into electric energy; the solar energy electricity collection module is used for completing the electric energy collection functions of maximum power output and boosting of the electric energy output by the photovoltaic cell; and storing the collected electric energy in a storage battery; the storage battery is used for finishing the functions of electric energy storage and buffering; the current sampling device is used for completing the charging and discharging current sampling function of the storage battery; the motor control module is used for converting input electric energy transmitted by the solar energy and electricity collection module into output electric energy with proper power so as to drive the water pumping device to act; the water pumping device is used for completing the water pumping function under the control of the motor control module.
The intelligent photovoltaic power generation pumping system of power self-adaptation that this embodiment provided compares with traditional pumping system, has following beneficial part:
the device is suitable for any occasions with illumination, and is convenient and quick to install, good in mobility and low in energy cost.
And secondly, the requirement on system configuration is low, and the equipment scale is small. The photovoltaic cell board power configuration scope is wide, and the usable power range of the motor that draws water is wide, and the alternating current-direct current type is all available.
And thirdly, with the help of the energy storage battery, the high-power water pumping motor can be driven by the low-power photovoltaic battery assembly, and the application range is wide.
And fourthly, the solar energy electricity collection module is independent of the motor control module, the system configuration can be flexibly matched, and the system is convenient to maintain and update.
Fifthly, the solar energy and electricity collecting module has the MPPT control function of the maximum power output of the photovoltaic cell, and the solar energy utilization rate is high; the current limiting function of the output current of the photovoltaic cell is achieved, and the power generation capacity and the application performance of the photovoltaic cell are improved.
Sixthly, the motor control module is flexible and controllable and can output alternating current or direct current electric energy with self-adaptive power regulation; the controller monitors the safety state and the health state of the energy storage battery, and can optimize the comprehensive performance of the storage battery under the condition of ensuring the water pumping function.
And seventhly, the light emitting of the current-limiting lamp enhances the illumination intensity of the photovoltaic cell, the power generation capacity of the photovoltaic cell is improved, and the solar energy utilization rate is further improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An intelligent photovoltaic power generation pumping system with self-adaptive power is characterized by comprising a photovoltaic cell (10), a solar energy electricity collection module (20), a motor control module (30), a storage battery (40), a current sampling device (50) and a pumping device (60), wherein,
the photovoltaic cell (10) is used for converting solar energy into electric energy;
the solar energy electricity collection module (20) is respectively electrically connected with the photovoltaic cell (10) and the storage battery (40) and is used for completing the functions of outputting the maximum power of the electric energy output by the photovoltaic cell (10) and collecting the boosted electric energy; and storing the collected electrical energy in the battery (40);
the storage battery (40) is electrically connected with the solar energy and electricity collecting module (20) and is used for completing the functions of electric energy storage and buffering;
the current sampling device (50) is used for completing the charging and discharging current sampling function of the storage battery (40);
the motor control module (30) is respectively electrically connected with the current sampling device (50), the solar energy and electricity collecting module (20) and the water pumping device (60) and is used for converting input electric energy transmitted by the solar energy and electricity collecting module (20) into output electric energy with proper power so as to drive the water pumping device (60) to act;
the water pumping device (60) is electrically connected with the motor control module (30) and is used for completing the water pumping function under the control of the motor control module (30).
2. The power self-adapting intelligent photovoltaic power generation pumping system according to claim 1, wherein the solar power collection module (20) comprises a first analog-to-digital converter, a second analog-to-digital converter, a third analog-to-digital converter, and a first digital controller, wherein,
the first analog-to-digital converter is electrically connected with the photovoltaic cell (10) and is used for converting the output voltage of the photovoltaic cell (10) into a photovoltaic cell output voltage sampling analog-to-digital conversion value;
the second analog-to-digital converter is electrically connected with the photovoltaic cell (10) and is used for converting the output current of the photovoltaic cell (10) into a photovoltaic cell output current sampling analog-to-digital conversion value;
the first digital controller is respectively electrically connected with the first analog-to-digital converter, the second analog-to-digital converter and the third analog-to-digital converter, and is used for receiving a photovoltaic cell output voltage sampling analog-to-digital conversion value converted by the first analog-to-digital converter and a photovoltaic cell output current sampling analog-to-digital conversion value converted by the second analog-to-digital converter, and transmitting an output solar energy electricity collection module voltage sampling analog-to-digital conversion value to the third analog-to-digital converter;
the third analog-to-digital converter is electrically connected with the first digital controller and used for converting the voltage sampling analog-to-digital conversion value of the solar energy electricity collection module output by the first digital controller into the output voltage of the solar energy electricity collection module.
3. The power self-adaptive intelligent photovoltaic power generation water pumping system according to claim 2, wherein the solar power collection module (20) further comprises a current-limiting lamp, a relay and a first switch circuit, the current-limiting lamp is connected in series with an output voltage terminal of the photovoltaic cell (10) and an output voltage terminal of the solar power collection module (20), and the first digital controller is electrically connected with the relay, the current-limiting lamp and the first switch circuit respectively and used for controlling the on or off of the relay, the current-limiting lamp and the first switch circuit.
4. The power self-adaptive intelligent photovoltaic power generation pumping system according to claim 3, wherein the solar power collection module (20) further comprises a boost inductor and a unidirectional isolation diode, wherein the boost inductor is divided into two paths, one path is connected with the anode of the unidirectional isolation diode, and the other path is connected with the first switch circuit.
5. The power adaptive intelligent photovoltaic power generation pumping system of claim 4, wherein the solar power collection module (20) further comprises a current sampling resistor connected in series with the second analog-to-digital converter.
6. The power self-adaptive intelligent photovoltaic power generation pumping system according to claim 5, wherein the motor control module (30) further comprises a first drive circuit connected between the first switch circuit and the first digital controller.
7. The power-adaptive intelligent photovoltaic power generation pumping system according to claim 6, wherein the first switching circuit is an MOS switching tube.
8. The power self-adapting intelligent photovoltaic power generation pumping system according to claim 1, wherein the motor control module (30) comprises a fourth analog-to-digital converter, a fifth analog-to-digital converter, a sixth analog-to-digital converter, and a second digital controller,
the fourth analog-to-digital converter is electrically connected with the storage battery (40) and is used for converting the input direct-current voltage from the storage battery (40) into a storage battery voltage sampling analog-to-digital conversion value;
the fifth analog-to-digital converter is electrically connected with the storage battery (40) and is used for converting the charging and discharging current of the storage battery (40) into a storage battery charging and discharging current sampling analog-to-digital conversion value;
the second digital controller is respectively electrically connected with the fourth analog-to-digital converter, the fifth analog-to-digital converter and the sixth analog-to-digital converter, and is used for receiving a storage battery voltage sampling analog-to-digital conversion value converted by the fourth analog-to-digital converter and a storage battery charging and discharging current sampling analog-to-digital conversion value converted by the fifth analog-to-digital converter, and transmitting an output storage battery current sampling analog-to-digital conversion value to the sixth analog-to-digital converter;
and the sixth analog-to-digital converter is electrically connected with the second digital controller and is used for converting the storage battery current sampling analog-to-digital conversion value output by the second digital controller into the motor output voltage.
9. The power-adaptive intelligent photovoltaic power generation pumping system according to claim 8, wherein the motor control module (30) further comprises an inverter bridge circuit, a second switch circuit, a second driving circuit and a buffer circuit, wherein the buffer circuit is connected with an input end of the second switch circuit, and an output end of the second switch circuit is electrically connected with the second digital controller through the second driving circuit; the inverter bridge circuit is electrically connected with the storage battery (40) and is used for converting the direct-current voltage input by the storage battery (40) into output voltage with controllable power and polarity; the second digital controller is respectively electrically connected with the inverter bridge circuit, the second switch circuit and the water pumping device (60) and is used for receiving the power and the output voltage with controllable polarity converted by the inverter bridge circuit, controlling the second switch circuit to act and completing the control function of the water pumping device (60).
10. The power self-adaptive intelligent photovoltaic power generation pumping system according to claim 1, wherein the pumping device (60) comprises a pumping motor and a pumping assembly connected with the pumping motor, and the pumping motor comprises a direct current motor and/or an alternating current motor; the current sampling device (50) adopts a current Hall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220617682.0U CN216872927U (en) | 2022-03-21 | 2022-03-21 | Intelligent photovoltaic power generation pumping system with self-adaptive power |
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| CN202220617682.0U CN216872927U (en) | 2022-03-21 | 2022-03-21 | Intelligent photovoltaic power generation pumping system with self-adaptive power |
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