Flexible photovoltaic hybrid energy storage management circuit

Abstract

The invention discloses a flexible photovoltaic hybrid energy storage management circuit, and relates to the technical field of photovoltaic energy storage, and the circuit comprises a second photovoltaic module which is used for photoelectric conversion and power adjustment; the first photovoltaic module is used for photoelectric conversion, electric energy transmission, electric energy superposition and power regulation control; the first detection module is used for performing low-voltage and high-voltage detection on the first photovoltaic module; the second detection module is used for carrying out low-voltage and high-voltage detection on the second photovoltaic module; the intelligent control module is used for signal receiving and module control; the second energy storage module is used for energy storage adjustment and discharge adjustment; the mode control module is used for controlling the second energy storage module and the first energy storage module to be connected in series; the first energy storage module is used for energy storage adjustment and discharge adjustment; and the grid-connected module is used for inversion regulation and is connected with an alternating-current power grid. According to the flexible photovoltaic hybrid energy storage management circuit, electric energy interaction between a photovoltaic system and an energy storage system can be realized, and the utilization rate of photovoltaic electric energy and the power supply efficiency of a power grid are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic energy storage, and particularly to a flexible photovoltaic hybrid energy storage management circuit. Background Art

[0002] Flexible photovoltaic hybrid energy storage refers to the combination of a photovoltaic power generation system and an energy storage system to achieve more efficient and reliable energy supply. In the prior art, a flexible photovoltaic hybrid energy storage management circuit usually includes a photovoltaic power generation part, an energy storage part, and a power grid part, and realizes the power management between the photovoltaic power generation system and the energy storage system or between the photovoltaic power generation system and the power grid system through a DC coupling or AC coupling method to meet different requirements and application scenarios. However, due to the influence of external factors on the photovoltaic power generation system, such as light intensity, temperature, etc., there will be a low-voltage or high-voltage situation, and at this time, it will be unable to normally supply power to the energy storage system or the power grid system, reducing the utilization rate of photovoltaic power and causing unnecessary energy waste. Therefore, it needs to be improved. Summary of the Invention

[0003] An embodiment of the present invention provides a flexible photovoltaic hybrid energy storage management circuit to solve the problems raised in the above background art.

[0004] According to an embodiment of the present invention, a flexible photovoltaic hybrid energy storage management circuit is provided, including: a second photovoltaic module, a second detection module, a first photovoltaic module, a first detection module, an intelligent control module, a first energy storage module, a second energy storage module, a mode control module, and a grid connection module;

[0005] The second photovoltaic module is used for performing photoelectric conversion and outputting a first electric energy, and performing power adjustment on the first electric energy and outputting a second electric energy;

[0006] The first photovoltaic module is connected to the second photovoltaic module and the intelligent control module, and is used for performing photoelectric conversion and outputting a third electric energy, receiving and storing the first electric energy, superimposing the stored first electric energy and the third electric energy, outputting a fourth electric energy, performing power adjustment on the third electric energy, or performing power adjustment on the fourth electric energy when receiving a first control signal output by the intelligent control module, and outputting a fifth electric energy;

[0007] The first detection module is connected to the first photovoltaic module, and is used for performing voltage sampling on the third electric energy and outputting a first potential signal when the sampled signal is lower than a set low-voltage threshold, and outputting a second potential signal when the sampled signal is higher than a set high-voltage threshold;

[0008] The second detection module is connected to the second photovoltaic module, and is used for performing voltage sampling on the third electric energy and outputting a third potential signal when the sampled signal is lower than a set low-voltage threshold, and outputting a fourth potential signal when the sampled signal is higher than a set high-voltage threshold;

[0009] The intelligent control module, connected to the first detection module and the second detection module, is configured to provide a first energy storage signal when the first potential signal and the second potential signal are not received, provide a second energy storage signal when the third potential signal and the fourth potential signal are not received, output a first discharge signal when only the first potential signal is received, output a second discharge signal when only the third potential signal is received, output a first control signal, a second control signal and a first energy storage signal when the first potential signal and the fourth potential signal are received or when the third potential signal and the second potential signal are received, and output a first control signal and a first energy storage signal when the first potential signal and the third potential signal are received;

[0010] The second energy storage module, connected to the mode control module and the second photovoltaic module, is configured to perform power regulation on the second electric energy when the second energy storage signal is received, store the regulated electric energy or the eighth electric energy transmitted by the mode control module, and release the stored electric energy and perform power regulation on the released electric energy when the second discharge signal is received, and output the sixth electric energy;

[0011] The mode control module, connected to the first energy storage module, the second energy storage module and the intelligent control module, is configured to control the second energy storage module to stop power regulation work when the second control signal is received, control the second energy storage module to be connected in series with the first energy storage module and transmit the eighth electric energy output by the first energy storage module to the second energy storage module;

[0012] The first energy storage module, connected to the first photovoltaic module and the intelligent control module, is configured to perform power regulation on the fifth electric energy and output the eighth electric energy when the first energy storage signal is received, store the eighth electric energy, and release the stored electric energy and perform power regulation on the released electric energy when the first discharge signal is received, and output the seventh electric energy;

[0013] The grid connection module, connected to the first photovoltaic module and the second photovoltaic module, is configured to perform inversion regulation on the second electric energy or the sixth electric energy, perform inversion regulation on the fifth electric energy or the seventh electric energy, and transmit the electric energy output by the inversion regulation to the AC grid.

[0014] As a further solution of the present invention: the first photovoltaic module includes a first photovoltaic power source, a second resistor, a first MOS transistor, a second MOS transistor, a third capacitor, a first resistor, a first switching transistor, a first converter and a second capacitor; the intelligent control module includes a first controller;

[0015] Preferably, the first terminal of the first photovoltaic power source is connected to the drain of the second MOS transistor and the first terminal of the third capacitor, and is connected to the gate of the second MOS transistor and the collector of the first switching transistor through the second resistor. The base of the first switching transistor is connected to the gate of the first MOS transistor and the IO5 terminal of the first controller through the first resistor. The drain of the first MOS transistor is connected to the second terminal of the third capacitor and the second photovoltaic module. The source of the first MOS transistor is connected to the source of the second MOS transistor and the input terminal of the first converter. The output terminal of the first converter is connected to the grid connection module and is connected to the ground terminal of the first converter, the emitter of the first switching transistor, the second terminal of the first photovoltaic power source, and the ground terminal through the second capacitor.

[0016] As a further aspect of the present invention: The second photovoltaic module includes a second photovoltaic power source, a second converter, and a first capacitor; the grid connection module includes a first inverter, a second inverter, and an AC grid interface;

[0017] Preferably, the first terminal of the second photovoltaic power source is connected to the input terminal of the second converter. The output terminal of the second converter is connected to the first terminal of the second inverter and is connected to the second terminal of the second photovoltaic power source, the second terminal of the second inverter, and the ground terminal through the first capacitor. The first terminal and the second terminal of the first inverter are respectively connected to the output terminal and the ground terminal of the first converter. The third terminal and the fourth terminal of the first inverter and the third terminal and the fourth terminal of the second inverter are all connected to the first terminal of the AC grid interface. The fourth terminal of the first inverter and the fourth terminal of the second inverter are all connected to the second terminal of the AC grid interface.

[0018] As a further aspect of the present invention: The first energy storage module includes a first battery, a first inductor, a second power transistor, a first power transistor, a third resistor, a second thyristor, and a fourth capacitor;

[0019] Preferably, the first terminal of the first battery is connected to the collector of the first power transistor and the emitter of the second power transistor through the first inductor. The collector of the second power transistor is connected to the output terminal of the first converter and the first terminal of the third resistor, and is connected to the anode of the second thyristor, the emitter of the first power transistor, and the ground terminal of the first converter through the fourth capacitor. The cathode of the second thyristor is connected to the second terminal of the first battery. The control terminal of the second thyristor is connected to the second terminal of the third resistor. The gate of the first power transistor and the gate of the second power transistor are respectively connected to the IO4 terminal and the IO1 terminal of the first controller.

[0020] As a further aspect of the present invention: The second energy storage module includes a bidirectional regulation device, a first thyristor, a fifth capacitor, and a second battery;

[0021] Preferably, the first end of the bidirectional regulating device is connected to the input end of the second converter and is connected to the anode of the first thyristor and the ground end of the second converter through a fifth capacitor. The cathode of the first thyristor is connected to the second end of the bidirectional regulating device and the second end of the second battery. The first end of the second battery is connected to the third end of the bidirectional regulating device. The control end of the first thyristor is connected to the second end of the third resistor and the mode control module.

[0022] As a further solution of the present invention: The mode control module includes a third power transistor, a fourth power transistor, a fourth resistor, and a second switching transistor;

[0023] Preferably, the emitter of the third power transistor is connected to the first end of the second battery, the collector of the third power transistor is connected to the second end of the first battery, the emitter of the fourth power transistor is connected to the second end of the second battery, the collector of the fourth power transistor is connected to the emitter of the first power transistor and the emitter of the second switching transistor. The gate of the fourth power transistor is connected to the gate of the third power transistor and the IO6 terminal of the first controller and is connected to the base of the second switching transistor through a fourth resistor. The collector of the second switching transistor is connected to the second end of the third resistor.

[0024] As a further solution of the present invention: The first detection module includes a fifth resistor, a sixth resistor, a first comparator, a second comparator, a first threshold device, and a second threshold device;

[0025] Preferably, the inverting input end of the first comparator is connected to the non-inverting input end of the second comparator and one end of the sixth resistor and is connected to the first end of the first photovoltaic power supply through a fifth resistor. The other end of the sixth resistor is connected to the second end of the first photovoltaic power supply. The output ends of the first comparator and the second comparator are respectively connected to the IO7 terminal and the IO8 terminal of the first controller. The non-inverting input end of the first comparator and the inverting input end of the second comparator are respectively connected to the first threshold device and the second threshold device.

[0026] As a further solution of the present invention: The second detection module includes a first detection device and a second detection device;

[0027] Preferably, the input ends of the first detection device and the second detection device are both connected to the first end of the second photovoltaic power supply. The output ends of the first detection device and the second detection device are respectively connected to the IO9 terminal and the IO10 terminal of the first controller.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The flexible photovoltaic hybrid energy storage management circuit of the present invention can perform photoelectric conversion and power regulation processing by the first photovoltaic module and the second photovoltaic module respectively, and perform energy storage work by the first energy storage module and the second energy storage module respectively. The grid connection module performs inversion processing to supply power to the AC grid. According to the power supply states of the first photovoltaic module and the second photovoltaic module detected by the first detection module and the second detection module respectively, the intelligent control module then controls the series power supply states of the first photovoltaic module and the second photovoltaic module, and controls the series energy storage states of the first energy storage module and the second energy storage module, realizing the electrical energy interaction between the photovoltaic system and the energy storage system, and improving the utilization rate of photovoltaic electrical energy and the power supply efficiency to the grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic block diagram of the principle of a flexible photovoltaic hybrid energy storage management circuit provided by an embodiment of the present invention.

[0031] Figure 2 It is a circuit diagram of a flexible photovoltaic hybrid energy storage management circuit provided by an embodiment of the present invention.

[0032] Figure 3 It is a circuit diagram of the first detection module provided by an embodiment of the present invention.

[0033] Figure 4 It is a circuit diagram of the second detection module provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] In one embodiment, please refer to Figure 1, a flexible photovoltaic hybrid energy storage management circuit, comprising: a second photovoltaic module 1, a second detection module 2, a first photovoltaic module 3, a first detection module 4, an intelligent control module 5, a first energy storage module 6, a second energy storage module 7, a mode control module 8 and a grid connection module 9;

[0036] Specifically, the second photovoltaic module 1 is used for performing photoelectric conversion and outputting a first electric energy, performing power regulation on the first electric energy and outputting a second electric energy;

[0037] The first photovoltaic module 3, connected to the second photovoltaic module 1 and the intelligent control module 5, is used for performing photoelectric conversion and outputting a third electric energy, receiving and storing the first electric energy, superimposing the stored first electric energy and the third electric energy, outputting a fourth electric energy, performing power regulation on the third electric energy or, when receiving a first control signal output by the intelligent control module 5, performing power regulation on the fourth electric energy and outputting a fifth electric energy;

[0038] The first detection module 4, connected to the first photovoltaic module 3, is used for performing voltage sampling on the third electric energy and outputting a first potential signal when the sampled signal is lower than a set low voltage threshold, and outputting a second potential signal when the sampled signal is higher than a set high voltage threshold;

[0039] The second detection module 2, connected to the second photovoltaic module 1, is used for performing voltage sampling on the third electric energy and outputting a third potential signal when the sampled signal is lower than a set low voltage threshold, and outputting a fourth potential signal when the sampled signal is higher than a set high voltage threshold;

[0040] The intelligent control module 5, connected to the first detection module 4 and the second detection module 2, is used for providing a first energy storage signal when not receiving the first potential signal and the second potential signal, providing a second energy storage signal when not receiving the third potential signal and the fourth potential signal, outputting a first discharge signal when only receiving the first potential signal, outputting a second discharge signal when only receiving the third potential signal, outputting a first control signal, a second control signal and a first energy storage signal when receiving the first potential signal and the fourth potential signal or receiving the third potential signal and the second potential signal, and outputting a first control signal and a first energy storage signal when receiving the first potential signal and the third potential signal;

[0041] The second energy storage module 7, connected to the mode control module 8 and the second photovoltaic module 1, is used for performing power regulation on the second electric energy when receiving the second energy storage signal, storing the regulated electric energy or the eighth electric energy transmitted by the mode control module 8, releasing the stored electric energy and performing power regulation on the released electric energy when receiving the second discharge signal, and outputting a sixth electric energy;

[0042] The mode control module 8, connected to the first energy storage module 6, the second energy storage module 7, and the intelligent control module 5, is configured to control the second energy storage module 7 to stop power regulation operation when receiving the second control signal, control the second energy storage module 7 to be connected in series with the first energy storage module 6, and transmit the eighth electric energy output by the first energy storage module 6 to the second energy storage module 7;

[0043] The first energy storage module 6, connected to the first photovoltaic module 3 and the intelligent control module 5, is configured to perform power regulation on the fifth electric energy and output the eighth electric energy when receiving the first energy storage signal, store the eighth electric energy, release the stored electric energy and perform power regulation on the released electric energy when receiving the first discharge signal, and output the seventh electric energy;

[0044] The grid connection module 9, connected to the first photovoltaic module 3 and the second photovoltaic module 1, is configured to perform inverter regulation on the second electric energy or the sixth electric energy, perform inverter regulation on the fifth electric energy or the seventh electric energy, and transmit the electric energy output by the inverter regulation to the AC grid.

[0045] In a specific embodiment, the above-mentioned second photovoltaic module 1 can adopt a second photovoltaic circuit composed of a photovoltaic power source, a converter, and a capacitor, and can perform photoelectric conversion and MPPT power regulation processing; the above-mentioned second detection module 2 can adopt a second detection circuit composed of detection devices, and can perform voltage sampling, high-voltage detection, and low-power detection on the second photovoltaic module 1; the above-mentioned first photovoltaic module 3 can adopt a first photovoltaic circuit composed of a photovoltaic power source, a field effect transistor, a triode, a converter, etc., and can perform photoelectric conversion, electric energy transmission control, electric energy superposition control, and MPPT power jump-level processing; the above-mentioned first detection module 4 can adopt a first detection circuit composed of a resistor, a comparator, and a threshold device, and can perform voltage sampling on the first photovoltaic module 3, and compare the magnitude relationship between the sampled signal and the set high-voltage threshold and low-voltage threshold, and then perform high-voltage or low-voltage detection; the above-mentioned intelligent control module 5 can adopt an intelligent control circuit composed of a single-chip microcomputer, integrating many components such as an arithmetic unit, a controller, a memory, and an input / output device, and realizing functions such as signal processing, data storage, module control, and timing control; the above-mentioned first energy storage module 6 can adopt a first energy storage circuit composed of a battery, an IGBT, an inductor, a thyristor, etc., and can realize step-down energy storage and step-up discharge operations; the above-mentioned second energy storage module 7 can adopt a second energy storage circuit composed of a battery, a thyristor, a bidirectional regulation device, etc., and can realize step-down energy storage and step-up discharge operations; the above-mentioned mode control module 8 can adopt a mode control circuit composed of an IGBT, a triode, and a resistor, and can control the first energy storage module 6 and the second energy storage module 7 to perform series energy storage operations; the above-mentioned grid connection module 9 can adopt a grid connection circuit composed of an inverter and an AC grid interface, and can perform inverter processing on the input electric energy and supply power to the connected AC grid.

[0046] In another embodiment, please refer to Figure 1, Figure 2 , Figure 3 and Figure 4 , the first photovoltaic module 3 includes a first photovoltaic power source, a second resistor R2, a first MOS transistor M1, a second MOS transistor M2, a third capacitor C3, a first resistor R1, a first switching transistor V1, a first converter, and a second capacitor C2; the intelligent control module 5 includes a first controller U1;

[0047] Specifically, the first end of the first photovoltaic power source is connected to the drain of the second MOS transistor M2 and the first end of the third capacitor C3 and is connected to the gate of the second MOS transistor M2 and the collector of the first switching transistor V1 through the second resistor R2. The base of the first switching transistor V1 is connected to the gate of the first MOS transistor M1 and the IO5 terminal of the first controller U1 through the first resistor R1. The drain of the first MOS transistor M1 is connected to the second end of the third capacitor C3 and the second photovoltaic module 1. The source of the first MOS transistor M1 is connected to the source of the second MOS transistor M2 and the input end of the first converter. The output end of the first converter is connected to the grid connection module 9 and is connected to the ground end of the first converter, the emitter of the first switching transistor V1, the second end of the first photovoltaic power source, and the ground through the second capacitor C2.

[0048] In a specific embodiment, the above-mentioned first MOS transistor M1 and second MOS transistor M2 can both be N-channel field effect transistors; the above-mentioned first switching transistor V1 can be an NPN-type triode; the above-mentioned first converter can be composed of a Boost circuit for MPPT power regulation processing; the above-mentioned first controller U1 can be an STM32 single-chip microcomputer; the above-mentioned third capacitor C3 can be an energy storage capacitor.

[0049] Furthermore, the second photovoltaic module 1 includes a second photovoltaic power source, a second converter, and a first capacitor C1; the grid connection module 9 includes a first inverter T1, a second inverter T2, and an AC grid interface;

[0050] Specifically, the first end of the second photovoltaic power source is connected to the input end of the second converter. The output end of the second converter is connected to the first end of the second inverter T2 and is connected to the second end of the second photovoltaic power source, the second end of the second inverter T2, and the ground through the first capacitor C1. The first end and the second end of the first inverter T1 are respectively connected to the output end and the ground end of the first converter. The third end and the fourth end of the first inverter T1 and the third end and the fourth end of the second inverter T2 are all connected to the first end of the AC grid interface. The fourth end of the first inverter T1 and the fourth end of the second inverter T2 are all connected to the second end of the AC grid interface.

[0051] In a specific embodiment, the above-mentioned second converter can be composed of a Boost circuit for MPPT power regulation processing; the above-mentioned first inverter T1 and second inverter T2 can both be composed of four groups of IGBTs.

[0052] Further, the first energy storage module 6 includes a first battery, a first inductor L1, a second power transistor Q2, a first power transistor Q1, a third resistor R3, a second thyristor S2, and a fourth capacitor C4;

[0053] Specifically, the first end of the first battery is connected to the collector of the first power transistor Q1 and the emitter of the second power transistor Q2 through the first inductor L1. The collector of the second power transistor Q2 is connected to the output end of the first converter and the first end of the third resistor R3, and is connected to the anode of the second thyristor S2, the emitter of the first power transistor Q1, and the ground end of the first converter through the fourth capacitor C4. The cathode of the second thyristor S2 is connected to the second end of the first battery. The control end of the second thyristor S2 is connected to the second end of the third resistor R3. The gates of the first power transistor Q1 and the second power transistor Q2 are respectively connected to the IO4 end and the IO1 end of the first controller U1.

[0054] In a specific embodiment, the above-mentioned first battery can be a storage battery; the above-mentioned second power transistor Q2 and the first power transistor Q1 can both be IGBTs. The first power transistor Q1 performs buck energy storage control, and the second power transistor Q2 performs boost discharge control; the above-mentioned second thyristor S2 can be a unidirectional thyristor.

[0055] Further, the second energy storage module 7 includes a bidirectional regulating device, a first thyristor S1, a fifth capacitor C5, and a second battery;

[0056] Specifically, the first end of the bidirectional regulating device is connected to the input end of the second converter and is connected to the anode of the first thyristor S1 and the ground end of the second converter through the fifth capacitor C5. The cathode of the first thyristor S1 is connected to the second end of the bidirectional regulating device and the second end of the second battery. The first end of the second battery is connected to the third end of the bidirectional regulating device. The control end of the first thyristor S1 is connected to the second end of the third resistor R3 and the mode control module 8.

[0057] In a specific embodiment, the circuit composition structure of the above-mentioned bidirectional regulating device is the same as that of the above-mentioned first inductor L1, second power transistor Q2, and first power transistor Q1, and performs buck energy storage control and boost discharge control; the above-mentioned second battery can be a storage battery.

[0058] Further, the mode control module 8 includes a third power transistor Q3, a fourth power transistor Q4, a fourth resistor R4, and a second switch tube V2;

[0059] Specifically, the emitter of the third power transistor Q3 is connected to the first end of the second battery, the collector of the third power transistor Q3 is connected to the second end of the first battery, the emitter of the fourth power transistor Q4 is connected to the second end of the second battery, the collector of the fourth power transistor Q4 is connected to the emitter of the first power transistor Q1 and the emitter of the second switching transistor V2, the gate of the fourth power transistor Q4 is connected to the gate of the third power transistor Q3 and the IO6 terminal of the first controller U1 and is connected to the base of the second switching transistor V2 through the fourth resistor R4, and the collector of the second switching transistor V2 is connected to the second end of the third resistor R3.

[0060] In a specific embodiment, the above-mentioned third power transistor Q3 and fourth power transistor Q4 can both be IGBTs; the above-mentioned second switching transistor V2 can be an NPN-type triode.

[0061] Further, the first detection module 4 includes a fifth resistor R5, a sixth resistor R6, a first comparator A1, a second comparator A2, a first threshold device, and a second threshold device;

[0062] Specifically, the inverting terminal of the first comparator A1 is connected to the non-inverting terminal of the second comparator A2 and one end of the sixth resistor R6 and is connected to the first end of the first photovoltaic power supply through the fifth resistor R5, the other end of the sixth resistor R6 is connected to the second end of the first photovoltaic power supply, the output terminals of the first comparator A1 and the second comparator A2 are respectively connected to the IO7 terminal and the IO8 terminal of the first controller U1, and the non-inverting terminal of the first comparator A1 and the inverting terminal of the second comparator A2 are respectively connected to the first threshold device and the second threshold device.

[0063] In a specific embodiment, the above-mentioned fifth resistor R5 and sixth resistor R6 perform voltage sampling; the above-mentioned first comparator A1 and second comparator A2 can both be LM358 comparators; the above-mentioned first threshold device and second threshold device can both be composed of a reference power supply and a resistor and respectively provide a low-voltage threshold and a high-voltage threshold.

[0064] Further, the second detection module 2 includes a first detection device and a second detection device;

[0065] Specifically, the input terminals of the first detection device and the second detection device are both connected to the first end of the second photovoltaic power supply, and the output terminals of the first detection device and the second detection device are respectively connected to the IO9 terminal and the IO10 terminal of the first controller U1.

[0066] In a specific embodiment, the circuit composition structure of the above-mentioned first detection device is the same as that of the fifth resistor R5, the sixth resistor R6, the first comparator A1, and the first threshold device for low-voltage detection; the circuit composition structure of the above-mentioned second detection device is the same as that of the fifth resistor R5, the sixth resistor R6, the second comparator A2, and the second threshold device for high-voltage detection.

[0067] In a flexible photovoltaic hybrid energy storage management circuit of this embodiment, the first photovoltaic power source and the second photovoltaic power source perform photoelectric conversion and respectively provide the third electric energy and the first electric energy. The second converter performs MPPT power regulation on the first electric energy and outputs the second electric energy. The second MOS transistor M2 transmits the third electric energy to the first converter. The fifth resistor R5 and the sixth resistor R6 perform voltage sampling on the first photovoltaic power source. When the sampled signal is lower than the low voltage threshold set by the first threshold device, the first comparator A1 outputs the first potential signal. When it is higher than the high voltage threshold set by the second threshold device, the second comparator A2 outputs the second potential signal, which are respectively received by the IO7 terminal and the IO8 terminal of the first controller U1. Similarly, when the second photovoltaic power source is at low voltage, the first detection device outputs the third potential signal. When it is at high voltage, the second detection device outputs the fourth potential signal, which are respectively received by the IO9 terminal and the IO10 terminal of the first controller U1. When the first controller U1 does not receive the first potential signal and the second potential signal, the IO1 terminal of the first controller U1 outputs the first energy storage signal, controls the conduction of the second power transistor Q2, and cooperates with the first inductor L1 and the fourth capacitor C4 to perform buck regulation, outputs the eighth capacitor and stores it in the first battery. When the first controller U1 does not receive the third potential signal and the fourth potential signal, the IO2 terminal of the first controller U1 provides the second energy storage signal, performs buck regulation processing on the second electric energy and stores it in the second battery. When the first controller U1 only receives the first potential signal, the IO4 terminal of the first controller U1 outputs the first discharge signal, controls the conduction of the first power transistor Q1, and cooperates with the first inductor L1, the second power transistor Q2 and the fourth capacitor C4 to perform boost discharge operation to supply power to the first inverter T1. Similarly, when the first controller U1 only receives the third potential signal, the IO3 terminal of the first controller U1 outputs the second discharge signal, controls the second battery to discharge in cooperation with the bidirectional regulation device and supply power to the second inverter T2. When the first controller U1 receives the first potential signal and the fourth potential signal or receives the third potential signal and the second potential signal, the IO5 terminal, the IO6 terminal and the IO1 terminal of the first controller U1 respectively output the first control signal, the second control signal and the first energy storage signal, control the conduction of the third power transistor Q3, the second power transistor Q2, the second switch transistor V2, the fourth power transistor Q4 and the first switch transistor V1, the second MOS transistor M2, the first thyristor S1 and the second thyristor S2 are cut off, and the first MOS transistor M1 is conducted, so that the first electric energy provided by the second photovoltaic power source stored in the third capacitor C3 is superimposed with the first electric energy and outputs the fourth electric energy. At the same time, the first battery and the second battery perform series energy storage operation. When the first controller U1 receives the first potential signal and the third potential signal, the first controller U1 outputs the first control signal and the first energy storage signal, stores the electric energy after superimposing the first photovoltaic power source and the second photovoltaic power source in the first battery. The first inverter T1 and the second inverter T2 perform inversion processing on the input electric energy and transmit the inverted electric energy to the AC power grid connected to the AC power grid interface.

[0068] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0069] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flexible photovoltaic hybrid energy storage management circuit, characterized in that: The flexible photovoltaic hybrid energy storage management circuit includes: a second photovoltaic module, a second detection module, a first photovoltaic module, a first detection module, an intelligent control module, a first energy storage module, a second energy storage module, a mode control module and a grid connection module; The second photovoltaic module is used to perform photoelectric conversion and output the first electric energy, perform power regulation on the first electric energy and output the second electric energy; The first photovoltaic module is connected to the second photovoltaic module and the intelligent control module, and is used to perform photoelectric conversion and output a third electric energy, receive and store the first electric energy, perform superposition processing on the stored first electric energy and the third electric energy, output a fourth electric energy, perform power regulation on the third electric energy, or when receiving the first control signal output by the intelligent control module, perform power regulation on the fourth electric energy, and output a fifth electric energy; The first detection module is connected to the first photovoltaic module, and is used to perform voltage sampling on the third electric energy and output a first potential signal when the sampled signal is lower than a set low voltage threshold, and output a second potential signal when the sampled signal is higher than a set high voltage threshold; The second detection module is connected to the second photovoltaic module, and is used to perform voltage sampling on the third electric energy and output a third potential signal when the sampled signal is lower than a set low voltage threshold, and output a fourth potential signal when the sampled signal is higher than a set high voltage threshold; The intelligent control module is connected to the first detection module and the second detection module, and is used to provide a first energy storage signal when the first potential signal and the second potential signal are not received, and to provide a second energy storage signal when the third potential signal and the fourth potential signal are not received, and to output a first discharge signal when only the first potential signal is received, and to output a second discharge signal when only the third potential signal is received, and to output a first control signal, a second control signal and a first energy storage signal when the first potential signal and the fourth potential signal are received or the third potential signal and the second potential signal are received, and to output a first control signal and a first energy storage signal when the first potential signal and the third potential signal are received; The second energy storage module is connected to the mode control module and the second photovoltaic module, and is used to perform power regulation on the second electric energy when receiving the second energy storage signal, store the regulated electric energy or the eighth electric energy transmitted by the mode control module, and release the stored electric energy and perform power regulation on the released electric energy when receiving the second discharge signal, and output the sixth electric energy; The mode control module is connected to the first energy storage module, the second energy storage module and the intelligent control module, and is used to control the second energy storage module to stop power regulation when receiving a second control signal, control the second energy storage module to be connected in series with the first energy storage module, and transmit the eighth electric energy output by the first energy storage module to the second energy storage module; The first energy storage module is connected to the first photovoltaic module and the intelligent control module, and is used to perform power regulation on the fifth electric energy and output the eighth electric energy and store the eighth electric energy when receiving the first energy storage signal, and release the stored electric energy and perform power regulation on the released electric energy and output the seventh electric energy when receiving the first discharge signal; The grid-connected module is connected to the first photovoltaic module and the second photovoltaic module, and is used to invert and regulate the second electric energy or the sixth electric energy, and to invert and regulate the fifth electric energy or the seventh electric energy, and transmit the electric energy output by the inversion regulation to the AC power grid.

2. A flexible photovoltaic hybrid energy storage management circuit according to claim 1, characterized in that: The first photovoltaic module includes a first photovoltaic power source, a second resistor, a first MOS tube, a second MOS tube, a third capacitor, a first resistor, a first switch tube, a first converter and a second capacitor; the intelligent control module includes a first controller; The first end of the first photovoltaic power source is connected to the drain of the second MOS tube and the first end of the third capacitor, and is connected to the gate of the second MOS tube and the collector of the first switch tube through the second resistor, the base of the first switch tube is connected to the gate of the first MOS tube and the IO5 end of the first controller through the first resistor, the drain of the first MOS tube is connected to the second end of the third capacitor and the second photovoltaic module, the source of the first MOS tube is connected to the source of the second MOS tube and the input end of the first converter, and the output end of the first converter is connected to the grid-connected module and is connected to the ground end of the first converter, the emitter of the first switch tube, the second end of the first photovoltaic power source and the ground end through the second capacitor.

3. A flexible photovoltaic hybrid energy storage management circuit according to claim 2, characterized in that: The second photovoltaic module includes a second photovoltaic power source, a second converter and a first capacitor; the grid-connected module includes a first inverter, a second inverter and an AC grid interface; The first end of the second photovoltaic power source is connected to the input end of the second converter, the output end of the second converter is connected to the first end of the second inverter and the second end of the second photovoltaic power source, the second end of the second inverter and the ground end through the first capacitor logic, the first end and the second end of the first inverter are respectively connected to the output end and the ground end of the first converter, the third end of the first inverter and the third end of the second inverter are both connected to the first end of the AC power grid interface, and the fourth end of the first inverter and the fourth end of the second inverter are both connected to the second end of the AC power grid interface.

4. A flexible photovoltaic hybrid energy storage management circuit according to claim 3, characterized in that: The first energy storage module includes a first battery, a first inductor, a second power tube, a first power tube, a third resistor, a second thyristor and a fourth capacitor; The first end of the first battery is connected to the collector of the first power tube and the emitter of the second power tube through the first inductor, the collector of the second power tube is connected to the output end of the first converter and the first end of the third resistor and is connected to the anode of the second thyristor, the emitter of the first power tube and the ground end of the first converter through the fourth capacitor, the cathode of the second thyristor is connected to the second end of the first battery, the control end of the second thyristor is connected to the second end of the third resistor, and the gate of the first power tube and the gate of the second power tube are respectively connected to the IO4 end and IO1 end of the first controller.

5. A flexible photovoltaic hybrid energy storage management circuit according to claim 4, characterized in that: The second energy storage module includes a bidirectional regulating device, a first thyristor, a fifth capacitor and a second battery; The first end of the bidirectional regulation device is connected to the input end of the second converter and is connected to the anode of the first thyristor and the ground end of the second converter through the fifth capacitor, the cathode of the first thyristor is connected to the second end of the bidirectional regulation device and the second end of the second battery, the first end of the second battery is connected to the third end of the bidirectional regulation device, and the control end of the first thyristor is connected to the second end of the third resistor and the mode control module.

6. A flexible photovoltaic hybrid energy storage management circuit according to claim 5, characterized in that: The mode control module includes a third power tube, a fourth power tube, a fourth resistor and a second switch tube; The emitter of the third power tube is connected to the first end of the second battery, the collector of the third power tube is connected to the second end of the first battery, the emitter of the fourth power tube is connected to the second end of the second battery, the collector of the fourth power tube is connected to the emitter of the first power tube and the emitter of the second switch tube, the gate of the fourth power tube is connected to the gate of the third power tube and the IO6 terminal of the first controller and is connected to the base of the second switch tube through the fourth resistor, and the collector of the second switch tube is connected to the second end of the third resistor.

7. A flexible photovoltaic hybrid energy storage management circuit according to claim 2, characterized in that: The first detection module includes a fifth resistor, a sixth resistor, a first comparator, a second comparator, a first threshold device and a second threshold device; The inverting end of the first comparator is connected to the non-inverting end of the second comparator and one end of the sixth resistor and connected to the first end of the first photovoltaic power supply through the fifth resistor, the other end of the sixth resistor is connected to the second end of the first photovoltaic power supply, the output end of the first comparator and the output end of the second comparator are connected to the IO7 end and the IO8 end of the first controller respectively, and the non-inverting end of the first comparator and the inverting end of the second comparator are connected to the first threshold device and the second threshold device respectively.

8. A flexible photovoltaic hybrid energy storage management circuit according to claim 3, characterized in that: The second detection module includes a first detection device and a second detection device; The input end of the first detection device and the input end of the second detection device are both connected to the first end of the second photovoltaic power source, and the output end of the first detection device and the output end of the second detection device are respectively connected to the IO9 end and the IO10 end of the first controller.

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