Photovoltaic water lifting energy storage control system

Abstract

A photovoltaic water lifting and energy storage control system disclosed by the present invention comprises a photovoltaic array, an energy storage inverter, a battery, a weak current cabinet and a main controller, the main controller is connected with the energy storage inverter, the battery, a relay and the weak current cabinet, and the main controller is used for detecting the voltage of the battery. After the main controller detects the power consumption of the battery and confirms that the unit is in a non-running state through the communication weak current cabinet, the energy storage inverter charges the battery by controlling the relay to be closed; after the main controller detects that the battery voltage is smaller than the discharge termination voltage and confirms that the unit is in a non-operation state through communication of the weak current cabinet and collection of the number of unit operation pulses, the relay is controlled to be closed to enable the energy storage inverter to charge the battery, and the weak current cabinet is controlled to be closed to enable the battery and the weak current cabinet to be cut off. On one hand, power consumption of the battery is reduced, charging efficiency of the battery is improved, and on the other hand, the battery is protected, and battery performance and damage caused by over-discharge of the battery are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic water pumping, and more specifically, to a photovoltaic water pumping energy storage control system. Background Art

[0002] With the development of solar photovoltaic power generation technology, photovoltaic water pumping technology has been widely used; photovoltaic water pumping technology has changed the traditional way of using diesel engines to drive water pumps to pump water and store water, and instead uses solar energy to convert light energy into electrical energy to drive water pumps to pump water.

[0003] Currently, if Figure 1 As shown, the photovoltaic water pumping system includes a photovoltaic array 1′, an energy storage inverter 2′, a battery 4′, a water pumping device 6′ and a weak current cabinet 5′; the photovoltaic array 1′ is used to directly convert the radiation energy of solar energy into electrical energy; the energy storage inverter 2′ is used to convert direct current into alternating current to achieve inversion and supply power to the water pumping device 6′, while realizing the storage and bidirectional flow of electrical energy by connecting with the battery 4′; the weak current cabinet 5′ is used to monitor the operating status of the water pumping device 6′, and when the battery 4′ is insufficient in power, the control relay 3′ is closed to enable the energy storage inverter 2′ to charge the battery 4′.

[0004] When the photovoltaic water pumping system is in operation, the battery needs to remain connected to the weak-current cabinet and continuously supply power to the weak-current cabinet to keep it in operation. However, the power consumption of the weak-current cabinet is relatively high during operation, about 30W, and it does not have an automatic power-off function, resulting in the battery still supplying power to the weak-current cabinet when it is in an over-discharged state, causing excessive discharge of the battery, affecting battery performance, and even damaging the battery.

[0005] Therefore, it is necessary to propose a new solution to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a photovoltaic water pumping energy storage control system.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A photovoltaic water pumping energy storage control system comprises a photovoltaic array, an energy storage inverter, a battery and a weak current cabinet, wherein the photovoltaic array is connected to the energy storage inverter, the energy storage inverter is connected to the battery through a relay, the battery is connected to the weak current cabinet and supplies power to the weak current cabinet, and further comprises a main controller, wherein the main controller is respectively connected to the energy storage inverter, the battery, the relay and the weak current cabinet, and the main controller is used to detect the voltage of the battery. After the main controller detects that the battery is consuming power and confirms that the unit is not in operation by communicating with the weak current cabinet, the main controller uses the control relay to close so that the energy storage inverter charges the battery. After the main controller detects that the battery voltage is less than the discharge termination voltage and confirms that the unit is not in operation by communicating with the weak current cabinet and collecting the number of unit operation pulses, the main controller uses the control relay to close so that the energy storage inverter charges the battery, and controls the weak current cabinet to close so that the battery and the weak current cabinet are cut off, and when the battery is charged to the starting voltage, the weak current cabinet is controlled to open so that the battery and the weak current cabinet are connected.

[0009] Furthermore, the main controller includes a control chip, and a communication circuit, a control circuit, a voltage detection circuit and a pulse capture circuit connected to the control chip. The control chip is connected to the energy storage inverter and the weak current cabinet through the communication circuit, the control chip is connected to the relay through the control circuit, the control chip is connected to the battery through the voltage detection circuit, and the control chip is connected to the unit through the pulse capture circuit.

[0010] Furthermore, the communication circuit includes a chip U42, a first pin of the chip U42 is connected to one end of a resistor R12, the other end of the resistor R12 is connected to a control chip, a second pin of the chip U42 is connected to one end of a resistor R13, the other end of the resistor R13 is connected to the control chip, a third pin of the chip U42 is connected to its second pin, a fourth pin of the chip U42 is connected to one end of a resistor R14, the other end of the resistor R14 is connected to the control chip, a fifth pin of the chip U42 is grounded, a sixth pin of the chip U42 is respectively connected to one end of a resistor R55 and a second input end of a common-mode filter L1, a seventh pin of the chip U42 is respectively connected to the other end of the resistor R55, one end of a resistor R7 and a first input end of a common-mode filter L1, an eighth pin of the chip U42 is respectively connected to one end of a resistor R8 and one end of a capacitor C48, and their common connection end is connected to a 3.3V voltage, and the other end of the resistor R8 is connected to the first input end of the common-mode filter L1. Two input terminals, the other end of the capacitor C48 is connected to the other end of the resistor R7, and the common connection terminal is grounded. The first output terminal of the common mode filter L1 is respectively connected to one end of the diode U38, one end of the diode D1, the first electrode of the gas discharge tube TV1 and the first end of the terminal U41. The second output terminal of the common mode filter L1 is respectively connected to one end of the diode U39, the other end of the diode D1, the second electrode of the gas discharge tube TV1 and the second end of the terminal U41. The other end of the diode U38, the other end of the diode U39 and the third electrode of the gas discharge tube TV1 are grounded. The third end of the terminal U41 is respectively connected to one end of the resistor R11, one end of the resistor U40 and one end of the capacitor C7. The other end of the resistor U40 is respectively connected to the other end of the capacitor C7 and one end of the resistor R80, and the common connection terminal is grounded. The other end of the resistor R11 is connected to the other end of the resistor R80, and the common connection terminal is grounded.

[0011] Furthermore, the control circuit includes an optocoupler U3, a first pin of the optocoupler U3 is respectively connected to one end of a resistor R219 and one end of a resistor R147, the other end of the resistor R147 is connected to a 3.3V voltage, a second pin of the optocoupler U3 is respectively connected to the other end of the resistor R219 and one end of a resistor R9, the other end of the resistor R9 is connected to a control chip, a third pin of the optocoupler U3 is grounded, a fourth pin of the optocoupler U3 is connected to one end of a resistor R148, the other end of the resistor R148 is respectively connected to one end of a resistor R149 and a gate of a MOS tube Q2, a source of the MOS tube Q2 is connected to the other end of the resistor R149, and the common connection end thereof is connected to a 24V voltage, and a drain of the MOS tube Q2 is connected to a relay.

[0012] Further, the voltage detection circuit includes a transistor Q4, the base of the transistor Q4 is respectively connected to one end of the resistor R72 and the cathode of the diode D8, the anode of the diode D8 is connected to one end of the resistor R77, the other end of the resistor R77 is connected to the control chip, the emitter of the transistor Q4 is connected to the other end of the resistor R72, and the common connection end thereof is grounded, the collector of the transistor Q4 is connected to one end of the resistor R71, the other end of the resistor R71 is respectively connected to one end of the resistor R70 and the gate of the MOS tube Q3, the source of the MOS tube Q3 is connected to the other end of the resistor R70, and the common connection end thereof is connected to the battery, the drain of the MOS tube Q3 is connected to one end of the resistor R76, the other end of the resistor R76 is respectively connected to one end of the capacitor C24 and one end of the resistor R75, and the common connection end thereof is connected to the control chip, the other end of the capacitor C24 is connected to the other end of the resistor R75, and the common connection end thereof is grounded.

[0013] Furthermore, the battery supplies power to the communication circuit, the control circuit, the voltage detection circuit and the pulse capture circuit through the power supply circuit. The power supply circuit includes a first power supply circuit and a second power supply circuit connected to the first power supply circuit. The first power supply circuit includes a chip U4. The first pin of the chip U4 is connected to one end of the capacitor C13, the eighth pin of the chip U4 is respectively connected to the other end of the capacitor C13, the negative electrode of the diode D10 and one end of the inductor L11, the positive electrode of the diode D10 is grounded, the other end of the inductor L11 is respectively connected to one end of the capacitor C89 and one end of the resistor R104, and the common connection end thereof is used to connect the second power supply circuit, the fourth pin of the chip U4 is respectively connected to the other end of the resistor R104 and one end of the resistor R103, the other end of the resistor R103 is grounded, the sixth pin and the ninth pin of the chip U4 are grounded, the seventh pin of the chip U4 is respectively connected to one end of the capacitor C88 and the cathode of the capacitor C87 One end, the cathode of the diode D9 and one end of the fuse F1, and their common connection end is connected to the voltage detection circuit, the other end of the capacitor C88, the other end of the capacitor C87 and the other end of the diode D9 are grounded, the other end of the fuse F1 is connected to the first end of the terminal P1, and the second end of the terminal P1 is grounded; the second power supply circuit includes a chip U33, the first pin of the chip U33 is grounded, the second pin of the chip U33 is respectively connected to one end of the resistor R221 and one end of the capacitor C67, and the common connection end outputs a 3.3V voltage, the other end of the resistor R221 is connected to the anode of the light-emitting diode LED12, the cathode of the light-emitting diode LED12 is grounded, the other end of the capacitor C67 is grounded, the third pin of the chip U33 is respectively connected to one end of the resistor R69 and one end of the capacitor U34, the other end of the capacitor U34 is grounded, and the other end of the resistor R69 is used to connect to the first power supply circuit.

[0014] Furthermore, the pulse capture circuit includes an optocoupler U2, a first pin of the optocoupler U2 is connected to one end of a resistor R146, the other end of the resistor R146 is respectively connected to one end of a resistor R220 and one end of a resistor R143, the other end of the resistor R220 is connected to one end of a diode D3, and the common connection end thereof is connected to the unit, the second pin of the optocoupler U2 is respectively connected to the other end of the resistor R143 and the other end of the diode D3, and the common connection end thereof is grounded, the third pin of the optocoupler U2 is connected to a resistor R144, and the common connection end thereof is connected to a control chip, the other end of the resistor R144 is grounded, the fourth pin of the optocoupler U2 is connected to one end of a resistor R145, and the other end of the resistor R145 is connected to a 3.3V voltage.

[0015] The beneficial effects of the present invention are:

[0016] The present invention is based on an existing photovoltaic water pumping system and adds a low-power main controller. The main controller is used to detect the battery power. When it is detected that the battery power is reduced due to power consumption, the main controller uses the communication weak-current cabinet to confirm that the unit is not in operation, and then uses the control relay to close to allow the energy storage inverter to charge the battery; when it is detected that the battery voltage is less than the discharge termination voltage due to power consumption, the main controller uses the communication weak-current cabinet and the number of unit operation pulses to confirm that the unit is not in operation, and then uses the control relay to close to allow the energy storage inverter to charge the battery, and controls the weak-current cabinet to close to cut off the connection between the battery and the weak-current cabinet, which reduces the power consumption of the battery and improves the charging efficiency of the battery, and protects the battery to prevent excessive discharge of the battery from affecting the battery performance and damage; when the battery is charged to the starting voltage, the main controller controls the weak-current cabinet to open to conduct between the battery and the weak-current cabinet, and the battery continues to supply power to the weak-current cabinet, and the weak-current cabinet operates to monitor the status of the water pumping equipment unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a photovoltaic water pumping system in the prior art;

[0018] Figure 2 A schematic diagram of the structure of the photovoltaic water pumping energy storage control system in this embodiment;

[0019] Figure 3 is a circuit diagram of a communication circuit in this embodiment;

[0020] Figure 4 is a circuit diagram of the control circuit in this embodiment;

[0021] Figure 5 is a circuit diagram of a voltage detection circuit in this embodiment;

[0022] Figure 6 This is a circuit diagram of the control chip in this embodiment;

[0023] Figure 7 is a circuit diagram of the first power supply circuit in this embodiment;

[0024] Figure 8 is a circuit diagram of the second power supply circuit in this embodiment;

[0025] Fig. 9 Schematic diagram of a pulse capture circuit in this embodiment.

[0026] Figure numerals: photovoltaic array 1, energy storage inverter 2, relay 3, battery 4, power supply circuit 401, weak current cabinet 5, water lifting equipment 6, main controller 7, control chip 701, communication circuit 702, control circuit 703, voltage detection circuit 704, pulse capture circuit 705, photovoltaic array 1′, energy storage inverter 2′, relay 3′, battery 4′, weak current cabinet 5′, water lifting equipment 6′. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment: A photovoltaic water pumping energy storage control system, such as Figure 2-Figure 9 As shown, it includes a photovoltaic array 1, an energy storage inverter 2, a battery 4 and a weak current cabinet 5. The photovoltaic array 1 is connected to the energy storage inverter 2, and the energy storage inverter 2 is connected to the battery 4 through a relay 3. The relay 3 is a magnetic attraction relay. The battery 4 is connected to the weak current cabinet 5 and supplies power to the weak current cabinet 5. Among them, the photovoltaic array 1 is used to convert the radiation energy of solar energy into electrical energy; the energy storage inverter 2 is used to convert direct current into alternating current to achieve inversion and supply power to the water lifting equipment 6, and at the same time realizes the storage and bidirectional flow of electrical energy by connecting to the battery 4; the weak current cabinet 5 includes a PLC controller and a plurality of groups of sensors connected to the PLC controller, which are used to monitor the status of the unit in the water lifting equipment 6, and the unit includes a plurality of groups of valves in the water lifting equipment 6.

[0029] The photovoltaic water pumping energy storage control system further includes a main controller 7, which is respectively connected to the energy storage inverter 2, the battery 4, the relay 3 and the weak current cabinet 5. The main controller 7 is used to detect the voltage of the battery 4. After the main controller 7 detects that the battery 4 is consuming power and confirms that the unit is not in operation through the communication weak current cabinet 5, the control relay 3 is closed to enable the energy storage inverter 2 to charge the battery 4. After the main controller 7 detects that the battery 4 voltage is less than the discharge termination voltage and confirms that the unit is not in operation through the communication weak current cabinet 5 and the number of unit operation pulses, the control relay 3 is closed to enable the energy storage inverter 2 to charge the battery 4, and the weak current cabinet 5 is controlled to be closed to cut off the connection between the battery 4 and the weak current cabinet 5, and when the battery 4 is charged to the starting voltage, the weak current cabinet 5 is controlled to be opened to connect the battery 4 and the weak current cabinet 5.

[0030] Specifically, when the photovoltaic water pumping system is in operation, the water pumping equipment 6 performs water pumping processing, the unit of the water pumping equipment 6 is in operation, the energy storage inverter 2 converts the DC power generated by the photovoltaic array 1 into AC power and supplies power to the water pumping equipment 6, or converts the DC power generated by the photovoltaic array 1 and the DC power stored in the battery 4 into AC power and supplies power to the water pumping equipment 6, the battery 4 is connected to the weak current cabinet 5 and supplies power to the weak current cabinet 5, the battery 4 continues to consume power so that the power of the battery 4 decreases; when the main controller 7 detects the voltage of the battery 4, when the main controller 7 detects that the power of the battery 4 decreases due to power consumption, the main controller 7 communicates with the PLC controller of the weak current cabinet 5 to obtain the status of the unit, if the unit is not in operation, the main controller 7 controls the relay 3 to close, and uses the energy storage inverter 2 to charge the battery 4; when the main controller 7 detects that the battery 4 is When the voltage of battery 4 is less than the discharge termination voltage of battery 4, main controller 7 communicates with PLC controller of weak current cabinet 5 to obtain the status of the unit. Meanwhile, main controller 7 collects the number of unit operation pulses to check the status of the unit. If it is determined that the unit is not in operation, main controller 7 controls relay 3 to close and uses energy storage inverter 2 to charge battery 4. Meanwhile, main controller 7 controls weak current cabinet 5 to close so as to cut off the connection between battery 4 and weak current cabinet 5. On the one hand, it reduces the power consumption of battery 4 and improves the charging efficiency of battery 4. On the other hand, it protects battery 4 to prevent excessive discharge of battery 4 from affecting the performance and damage of battery 4. When battery 4 is charged to the starting voltage, main controller 7 controls weak current cabinet 4 to open so as to conduct between battery 4 and weak current cabinet 5. Battery 4 continues to supply power to weak current cabinet 5. Weak current cabinet 5 operates to monitor the status of water lifting equipment 6 unit.

[0031] The discharge termination voltage is based on the protection of battery 4. When the voltage of battery 4 is lower than the discharge termination voltage, continued discharge of battery 4 will have a certain impact on its performance, or even damage battery 4. The value of the starting voltage is higher than the value of the discharge termination voltage to avoid frequent opening and closing of the weak current cabinet 5. For example, the discharge termination voltage of battery 4 is set to 48V and the starting voltage is set to 51V.

[0032] When the photovoltaic water pumping system is running, the battery 4 remains connected to the main controller 7 and continuously supplies power to the main controller 7. The main controller 7 is a low-power controller with a power consumption of about 1W. Therefore, compared with the power consumption of the weak-current cabinet 5, the power consumption of the main controller 7 is almost negligible.

[0033] Further, such as Figure 2 As shown, the main controller 7 includes a control chip 701, and a communication circuit 702, a control circuit 703, a voltage detection circuit 704 and a pulse capture circuit 705 connected to the control chip 701. The control chip 701 is a low-power control chip, which is connected to the energy storage inverter 2 and the weak current cabinet 5 through the communication circuit 702, the control chip 701 is connected to the relay 3 through the control circuit 703, the control chip 701 is connected to the battery 4 through the voltage detection circuit 704, and is connected to the unit through the pulse capture circuit 705.

[0034] like Figure 3As shown, the communication circuit 702 includes a chip U42, which is a 485 communication chip and includes eight pins. The first pin of the chip U42 is connected to one end of the resistor R12, and the other end of the resistor R12 is connected to the thirty-first pin of the control chip 701. The second pin of the chip U42 is connected to one end of the resistor R13, and the other end of the resistor R13 is connected to the thirty-second pin of the control chip 701. The third pin of the chip U42 is connected to its second pin. The fourth pin of the chip U42 is connected to one end of the resistor R14, and the other end of the resistor R14 is connected to the 30th pin of the control chip 701. The fifth pin of the chip U42 is grounded. The sixth pin of the chip U42 is respectively connected to one end of the resistor R55 and the second input end of the common mode filter L1. The seventh pin of the chip U42 is respectively connected to the other end of the resistor R55, one end of the resistor R7 and the first input end of the common mode filter L1. The eighth pin of the chip U42 is respectively connected to one end of the resistor R8 and one end of the capacitor C48, and the common connection terminal thereof is connected to a 3.3V voltage. The other end of the resistor R8 is connected to the second input end of the common mode filter L1, the other end of the capacitor C48 is connected to the other end of the resistor R7, and their common connection end is grounded. The first output end of the common mode filter L1 is respectively connected to one end of the diode U38, one end of the diode D1, the first electrode of the gas discharge tube TV1 and the first end of the terminal U41. The second output end of the common mode filter L1 is respectively connected to one end of the diode U39, the other end of the diode D1, the second electrode of the gas discharge tube TV1 and the second end of the terminal U41. The other end of the diode U38, the other end of the diode U39 and the third electrode of the gas discharge tube TV1 are grounded. The third end of the terminal U41 is respectively connected to one end of the resistor R11, one end of the resistor U40 and one end of the capacitor C7. The other end of the resistor U40 is respectively connected to the other end of the capacitor C7 and one end of the resistor R80, and their common connection end is grounded. The other end of the resistor R11 is connected to the other end of the resistor R80, and their common connection end is grounded.

[0035] In the communication circuit 702, the chip U42 and the control chip 701 perform a conversion between the 485 signal and the TTL level, and then pass through the impedance matching resistor R55 to the common mode filter L1; the common mode filter L1 can effectively suppress the common mode noise and prevent unnecessary high frequency components from affecting the quality of data transmission, thereby improving the stability and anti-interference ability of the communication. The diode U38 and the diode U39 are transient voltage suppression diodes, which can prevent transient overvoltage events in the rear stage or the front stage, respond quickly and provide an ultra-low impedance path in a short time, and guide the transient energy to the ground line to avoid damage to electronic components. The diode D1 can prevent the differential signal pair from burning due to abnormal voltage difference. The gas discharge tube TV1 cooperates with the diode U38 and the diode U39 of the front stage to play a role in lightning protection. The terminal U41 is used to connect the energy storage inverter 2 and the PLC controller of the weak current cabinet 5. The terminal U41 is used to realize that the main controller 7 sends instructions to the energy storage inverter 2 to charge the battery 4, and sends instructions to the PLC controller of the weak current cabinet 5 to control the opening and closing of the weak current cabinet 5.

[0036] like Figure 4 As shown, the control circuit 703 includes an optocoupler U3, a first pin of the optocoupler U3 is respectively connected to one end of a resistor R219 and one end of a resistor R147, the other end of the resistor R147 is connected to a 3.3V voltage, a second pin of the optocoupler U3 is respectively connected to the other end of the resistor R219 and one end of a resistor R9, the other end of the resistor R9 is connected to the fifteenth pin of the control chip 701, a third pin of the optocoupler U3 is grounded, a fourth pin of the optocoupler U3 is connected to one end of a resistor R148, the other end of the resistor R148 is respectively connected to one end of a resistor R149 and a gate of a MOS tube Q2, a source of the MOS tube Q2 is connected to the other end of the resistor R149, and the common connection end thereof is connected to a 24V voltage, and a drain of the MOS tube Q2 is connected to the control end of the relay 3.

[0037] In the control circuit 703, the resistor R147 is used for current limiting, the resistor R219 is used for charge discharge of the control end of the optocoupler U3, and the control chip 701 gives the control signal to the control circuit 703 through the other end of the resistor R9. When the control chip 701 gives the control signal, the right end of the optocoupler U3 is closed, and after the MOS tube Q2 Vgs (th) reaches the conduction condition, the MOS tube Q2 is closed so that its drain end obtains a 24V voltage signal, which is used to control the relay 3 to close. The resistor R148 is used for current limiting, and the resistor R149 is used to turn on the MOS tube Q2 and discharge the internal charge.

[0038] like Figure 5As shown, the voltage detection circuit 704 includes a transistor Q4, the base of the transistor Q4 is respectively connected to one end of the resistor R72 and the cathode of the diode D8, the anode of the diode D8 is connected to one end of the resistor R77, the other end of the resistor R77 is connected to the fourteenth pin of the control chip 701, the emitter of the transistor Q4 is connected to the other end of the resistor R72, and the common connection end thereof is grounded, the collector of the transistor Q4 is connected to one end of the resistor R71, the other end of the resistor R71 is respectively connected to one end of the resistor R70 and the gate of the MOS transistor Q3, the source of the MOS transistor Q3 is connected to the other end of the resistor R70, and the common connection end thereof is connected to the battery 4, the drain of the MOS transistor Q3 is connected to one end of the resistor R76, the other end of the resistor R76 is respectively connected to one end of the capacitor C24 and one end of the resistor R75, and the common connection end thereof is connected to the eleventh pin of the control chip 701, and the other end of the capacitor C24 is connected to the other end of the resistor R75, and the common connection end thereof is grounded.

[0039] In the voltage detection circuit 704, the control chip 701 outputs a high-level signal to the resistor R77. After the resistor R77 is subjected to current limiting processing, it passes through the diode D8 to prevent reverse flow, so that the base of the transistor Q4 is enabled, and the left side of the resistor R71 is grounded. Then the resistor R70 and the resistor R71 divide the voltage so that there is a voltage difference between the two ends of the resistor R70, so that the MOS tube Q3 Vgs (th) reaches the condition and closes. After the voltage is divided by the resistor R75 and the resistor R76, the V_ADC end obtains the corresponding analog value, and the capacitor C24 plays a role in making the voltage signal of the V_ADC end more stable. When the control chip 701 obtains the analog value, it can convert and obtain the voltage of the battery 4.

[0040] Furthermore, the battery 4 supplies power to the main controller 7 through the power supply circuit 401, that is, it is connected to the communication circuit 702, the control circuit 703, the voltage detection circuit 704 and the pulse capture circuit 705, such as Figure 7 , Figure 8As shown, the power supply circuit 401 includes a first power supply circuit 401 and a second power supply circuit 401 connected to the first power supply circuit 401. The first power supply circuit 401 includes a chip U4. The first pin of the chip U4 is connected to one end of the capacitor C13, the eighth pin of the chip U4 is respectively connected to the other end of the capacitor C13, the cathode of the diode D10 and one end of the inductor L11, the anode of the diode D10 is grounded, the other end of the inductor L11 is respectively connected to one end of the capacitor C89 and one end of the resistor R104, and the common connection end thereof is used to connect the second power supply circuit 401, the fourth pin of the chip U4 is respectively connected to the other end of the resistor R104 and one end of the resistor R103, the other end of the resistor R103 is grounded, the sixth pin and the ninth pin of the chip U4 are grounded, and the seventh pin of the chip U4 is respectively connected to one end of the capacitor C88, one end of the capacitor C87, the cathode of the diode D9 and the inductor L11. One end of the fuse F1, and its common connection end is connected to the voltage detection circuit 704, the other end of the capacitor C88, the other end of the capacitor C87 and the other end of the diode D9 are grounded, the other end of the fuse F1 is connected to the first end of the terminal P1, and the second end of the terminal P1 is grounded; the second power supply circuit 401 includes a chip U33, the first pin of the chip U33 is grounded, the second pin of the chip U33 is respectively connected to one end of the resistor R221 and one end of the capacitor C67, and its common connection end outputs a 3.3V voltage, the other end of the resistor R221 is connected to the positive electrode of the light-emitting diode LED12, the negative electrode of the light-emitting diode LED12 is grounded, the other end of the capacitor C67 is grounded, the third pin of the chip U33 is respectively connected to one end of the resistor R69 and one end of the capacitor U34, the other end of the capacitor U34 is grounded, and the other end of the resistor R69 is used to connect the first power supply circuit 401.

[0041] Furthermore, the operating status of the unit is reflected in the form of pulses, and the real-time status of the unit can be obtained by reading the pulses. Fig. 9 As shown, the pulse capture circuit 705 includes an optocoupler U2, a first pin of the optocoupler U2 is connected to one end of a resistor R146, the other end of the resistor R146 is respectively connected to one end of a resistor R220 and one end of a resistor R143, the other end of the resistor R220 is connected to one end of a diode D3, and the common connection end thereof is connected to the unit, the second pin of the optocoupler U2 is respectively connected to the other end of the resistor R143 and the other end of the diode D3, and the common connection end thereof is grounded, the third pin of the optocoupler U2 is connected to a resistor R144, and the common connection end thereof is connected to the sixteenth pin of the control chip 701, the other end of the resistor R144 is grounded, the fourth pin of the optocoupler U2 is connected to one end of a resistor R145, and the other end of the resistor R145 is connected to a 3.3V voltage.

[0042] In the pulse capture circuit 705, the D_IN_1 terminal is used to connect the unit. When the D_IN_1 terminal is at a high level, the resistor R220 and the resistor R143 divide the voltage. After the resistor R146 limits the current, the internal diode of the optocoupler U2 receives a closing signal, so that the MCU_D_IN_1 terminal receives the unit status data. The diode D3 is a transient voltage suppression diode, which prevents overvoltage static electricity from being input into the circuit.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A photovoltaic water pumping energy storage control system, comprising a photovoltaic array (1), an energy storage inverter (2), a battery (4) and a weak current cabinet (5), wherein the photovoltaic array (1) is connected to the energy storage inverter (2), the energy storage inverter (2) is connected to the battery (4) via a relay (3), the battery (4) is connected to the weak current cabinet (5) and supplies power to the weak current cabinet (5), characterized in that: The invention also comprises a main controller (7), wherein the main controller (7) is respectively connected to the energy storage inverter (2), the battery (4), the relay (3) and the weak current cabinet (5), and the main controller (7) is used to detect the voltage of the battery (4). After the main controller (7) detects that the battery (4) consumes power and confirms that the unit is not in operation through the communication weak current cabinet (5), the control relay (3) is closed to enable the energy storage inverter (2) to charge the battery (4). After the main controller (7) detects that the battery (4) voltage is less than the discharge termination voltage and confirms that the unit is not in operation through the communication weak current cabinet (5) and the number of unit operation pulses, the control relay (3) is closed to enable the energy storage inverter (2) to charge the battery (4), and the weak current cabinet (5) is controlled to be closed to cut off the connection between the battery (4) and the weak current cabinet (5), and when the battery (4) is charged to the starting voltage, the weak current cabinet (5) is controlled to be opened to connect the battery (4) and the weak current cabinet (5).

2. A photovoltaic water pumping energy storage control system according to claim 1, characterized in that: The main controller (7) comprises a control chip (701), a communication circuit (702), a control circuit (703), a voltage detection circuit (704) and a pulse capture circuit (705) connected to the control chip (701); the control chip (701) is connected to the energy storage inverter (2) and the weak current cabinet (5) via the communication circuit (702); the control chip (701) is connected to the relay (3) via the control circuit (703); the control chip (701) is connected to the battery (4) via the voltage detection circuit (704); and the control chip (701) is connected to the generator set via the pulse capture circuit (705).

3. A photovoltaic water pumping energy storage control system according to claim 2, characterized in that: The communication circuit (702) includes a chip U42, wherein a first pin of the chip U42 is connected to one end of a resistor R12, and the other end of the resistor R12 is connected to a control chip (701); a second pin of the chip U42 is connected to one end of a resistor R13, and the other end of the resistor R13 is connected to the control chip (701); a third pin of the chip U42 is connected to its second pin; a fourth pin of the chip U42 is connected to one end of a resistor R14, and the other end of the resistor R14 is connected to the control chip (701); a fifth pin of the chip U42 is grounded; a sixth pin of the chip U42 is respectively connected to one end of a resistor R55 and a second input end of a common-mode filter L1; a seventh pin of the chip U42 is respectively connected to the other end of the resistor R55, one end of a resistor R7, and a first input end of the common-mode filter L1; an eighth pin of the chip U42 is respectively connected to one end of a resistor R8 and one end of a capacitor C48, and their common connection end is connected to a 3.3V voltage; the other end of the resistor R8 is connected to a common-mode The second input end of the filter L1, the other end of the capacitor C48 is connected to the other end of the resistor R7, and their common connection end is grounded, the first output end of the common mode filter L1 is respectively connected to one end of the diode U38, one end of the diode D1, the first electrode of the gas discharge tube TV1 and the first end of the terminal U41, the second output end of the common mode filter L1 is respectively connected to one end of the diode U39, the other end of the diode D1, the second electrode of the gas discharge tube TV1 and the second end of the terminal U41, the other end of the diode U38, the other end of the diode U39 and the third electrode of the gas discharge tube TV1 are grounded, the third end of the terminal U41 is respectively connected to one end of the resistor R11, one end of the resistor U40 and one end of the capacitor C7, the other end of the resistor U40 is respectively connected to the other end of the capacitor C7 and one end of the resistor R80, and their common connection end is grounded, the other end of the resistor R11 is connected to the other end of the resistor R80, and their common connection end is grounded.

4. A photovoltaic water pumping energy storage control system according to claim 2, characterized in that: The control circuit (703) comprises an optocoupler U3, wherein a first pin of the optocoupler U3 is respectively connected to one end of a resistor R219 and one end of a resistor R147, the other end of the resistor R147 is connected to a 3.3V voltage, a second pin of the optocoupler U3 is respectively connected to the other end of the resistor R219 and one end of a resistor R9, the other end of the resistor R9 is connected to a control chip (701), a third pin of the optocoupler U3 is grounded, a fourth pin of the optocoupler U3 is connected to one end of a resistor R148, the other end of the resistor R148 is respectively connected to one end of a resistor R149 and a gate of a MOS tube Q2, a source of the MOS tube Q2 is connected to the other end of the resistor R149, and a common connection end thereof is connected to a 24V voltage, and a drain of the MOS tube Q2 is connected to a relay (3).

5. A photovoltaic water pumping energy storage control system according to claim 2, characterized in that: The voltage detection circuit (704) comprises a transistor Q4, the base of the transistor Q4 is respectively connected to one end of a resistor R72 and the negative electrode of a diode D8, the positive electrode of the diode D8 is respectively connected to one end of a resistor R77, the other end of the resistor R77 is connected to a control chip (701), the emitter of the transistor Q4 is connected to the other end of the resistor R72, and the common connection end thereof is grounded, the collector of the transistor Q4 is connected to one end of a resistor R71, the other end of the resistor R71 is respectively connected to one end of a resistor R70 and the gate of a MOS transistor Q3, the source of the MOS transistor Q3 is connected to the other end of the resistor R70, and the common connection end thereof is connected to a battery (4), the drain of the MOS transistor Q3 is connected to one end of a resistor R76, the other end of the resistor R76 is respectively connected to one end of a capacitor C24 and one end of a resistor R75, and the common connection end thereof is connected to the control chip (701), and the other end of the capacitor C24 is connected to the other end of the resistor R75, and the common connection end thereof is grounded.

6. A photovoltaic water pumping energy storage control system according to claim 2, characterized in that: The battery (4) supplies power to the communication circuit (702), the control circuit (703), the voltage detection circuit (704) and the pulse capture circuit (705) through the power supply circuit (401), the power supply circuit (401) comprising a first power supply circuit (401) and a second power supply circuit (401) connected to the first power supply circuit (401), the first power supply circuit (401) comprising a chip U4, the first pin of the chip U4 being connected to one end of the capacitor C13, the eighth pin of the chip U4 being connected to the capacitor C14, and the eighth pin of the chip U4 being connected to the capacitor C15. The other end of the capacitor C13, the cathode of the diode D10 and one end of the inductor L11, the anode of the diode D10 is grounded, the other end of the inductor L11 is respectively connected to one end of the capacitor C89 and one end of the resistor R104, and the common connection end thereof is used to connect to the second power supply circuit (401), the fourth pin of the chip U4 is respectively connected to the other end of the resistor R104 and one end of the resistor R103, the other end of the resistor R103 is grounded, the sixth pin and the ninth pin of the chip U4 are grounded, and the seventh pin of the chip U4 is The pins are respectively connected to one end of capacitor C88, one end of capacitor C87, the cathode of diode D9 and one end of fuse F1, and their common connection end is connected to voltage detection circuit (704), the other end of capacitor C88, the other end of capacitor C87 and the other end of diode D9 are grounded, the other end of fuse F1 is connected to the first end of terminal P1, and the second end of terminal P1 is grounded; the second power supply circuit (401) comprises chip U33, the first pin of chip U33 is grounded, the second pin of chip U33 is respectively connected to one end of resistor R221 and one end of capacitor C67, and their common connection end outputs 3.3V voltage, the other end of resistor R221 is connected to the anode of light-emitting diode LED12, the cathode of light-emitting diode LED12 is grounded, the other end of capacitor C67 is grounded, the third pin of chip U33 is respectively connected to one end of resistor R69 and one end of capacitor U34, the other end of capacitor U34 is grounded, and the other end of resistor R69 is used to connect to the first power supply circuit (401).

7. A photovoltaic water pumping energy storage control system according to claim 2, characterized in that: The pulse capture circuit (705) includes an optocoupler U2, wherein a first pin of the optocoupler U2 is connected to one end of a resistor R146, and the other end of the resistor R146 is respectively connected to one end of a resistor R220 and one end of a resistor R143, and the other end of the resistor R220 is connected to one end of a diode D3, and the common connection end thereof is connected to the unit, a second pin of the optocoupler U2 is respectively connected to the other end of the resistor R143 and the other end of the diode D3, and the common connection end thereof is grounded, a third pin of the optocoupler U2 is connected to a resistor R144, and the common connection end thereof is connected to a control chip (701), and the other end of the resistor R144 is grounded, and a fourth pin of the optocoupler U2 is connected to one end of a resistor R145, and the other end of the resistor R145 is connected to a 3.3V voltage.

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