Water-light storage and charging integrated system and energy regulation and control method thereof

Abstract

The invention relates to the technical field of clean energy storage and charging systems and energy regulation and control, in particular to a water-light storage and charging integrated system and an energy regulation and control method thereof.The water-light storage and charging integrated system comprises a water-light power generation system with a direct-current output end, and an energy storage converter of an energy storage module is connected with the direct-current output end through a first switch; the DC output end, the power supply DC-DC converter, the second switch and the load charging end are connected in sequence, the three-phase power grid system, the three-phase power electronic transformer, the third switch and the load charging end are connected in sequence, and the three-phase power electronic transformer is connected with the energy storage converter through the fourth switch; the control module calculates an electric quantity difference value according to the real-time power generation amount and the real-time load power consumption collected by the data collection module, controls the working state of each switch according to the electric quantity difference value and the real-time power consumption, can select a plurality of energy regulation and control modes, flexibly dispatches energy supply of the water-light power generation system and the three-phase power grid system, and improves the energy utilization rate of the water-light power generation system. Therefore, the fusion degree of the water-light power generation system and the three-phase power grid system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical fields of clean energy storage and charging systems and energy regulation, and particularly relates to a water-light-storage integrated system and an energy regulation method thereof. Background Art

[0002] With the continuous development of new energy technologies, new energy power generation such as photovoltaic and wind power is more and more widely applied, and the installed scale of new energy is huge. However, the problem of low power generation efficiency has become a bottleneck restricting the development of new energy technologies. Affected by uncertain factors and conditions such as climate and temperature, new energy power generation has randomness, volatility and intermittency. Therefore, its large-scale development will inevitably have a significant impact on power grid dispatching and the safe operation of the system.

[0003] Energy storage systems can effectively improve the operating performance of intermittent power sources, enhance the power system regulation ability, help enhance the power grid's acceptance capacity for new energy, effectively reduce the occurrence of wind and light abandonment, and can greatly improve the utilization of new energy resources and the economy of new energy power generation. Under the traditional power grid architecture, the key points of power conversion are substations or transformers, but they cannot be flexibly controlled to achieve the decoupling of "source" and "use". Under the energy Internet architecture, energy routers can play the role of distributed energy management and operation scheduling. The patent document with the publication number of CN108899921B discloses an energy management strategy for a multi-port energy router for energy storage. According to the designed energy management strategy, the energy management strategy for the corresponding period is run, and the charge and discharge power of the energy storage system can be reasonably configured, and the charge and discharge cost of the energy storage can be reduced.

[0004] Driven by the carbon peak target, the water-light complementary system has become the main power supply form in mountainous and hilly areas. Therefore, it is necessary to design a storage and charging integrated system and its energy regulation strategy in combination with the power grid system, water-light power generation system, energy storage system and load power consumption, so as to flexibly dispatch the energy supply of the water-light power generation system and the power grid system and improve the integration degree of the water-light power generation system and the power grid system. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention proposes a water-light-storage integrated system and an energy regulation method thereof, which can flexibly dispatch the energy supply of the water-light power generation system and the three-phase power grid system and improve the integration degree of the water-light power generation system and the three-phase power grid system.

[0006] To solve the above technical problems, the present invention provides a water-light-storage integrated system, including: A water-light power generation system provided with a DC output terminal; An energy storage module provided with an energy storage converter, and the energy storage converter is connected to the DC output terminal through a first switch; The power supply DC-DC converter has its input terminal connected to the DC output terminal through a second switch, and its output terminal is connected to the load charging terminal; The three-phase power electronic transformer has its input terminal connected to the three-phase power grid system, and its output terminal is connected to the load charging terminal through a third switch and is connected to the energy storage converter through a fourth switch; The data acquisition module is used to acquire the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging terminal; The control module is used to calculate the power difference between the real-time power generation and the real-time load power consumption, and control the working states of the first switch, the second switch, the third switch, and the fourth switch according to the power difference and the real-time power consumption.

[0007] Preferably, in the above solution, a DC bus is further included. The power supply DC-DC converter is connected to the load charging terminal through the DC bus. The output terminal of the three-phase power electronic transformer, the third switch, the DC bus, and the load charging terminal are connected in sequence. The output terminal of the three-phase power electronic transformer, the DC bus, the fourth switch, and the energy storage converter are connected in sequence.

[0008] Preferably, in the above solution, the three-phase power electronic transformer includes three single-phase power electronic transformers. Each single-phase power electronic transformer is provided with multiple groups of AC-DC converters and DC-DC converters. The AC-DC converter and the DC-DC converter in the same group are connected in series.

[0009] Preferably, in the above solution, the AC-DC converters of the same single-phase power electronic transformer are connected in series, and the DC-DC converters of different single-phase power electronic transformers are connected in parallel.

[0010] Preferably, in the above solution, the water-light power generation system includes a hydroelectric power generation subsystem and a power generation AC-DC converter. The hydroelectric power generation subsystem is connected to the DC output terminal through the power generation AC-DC converter.

[0011] Preferably, in the above solution, the water-light power generation system further includes a photovoltaic power generation subsystem and a power generation DC-DC converter. The photovoltaic power generation subsystem is connected to the DC output terminal through the power generation DC-DC converter.

[0012] An energy regulation method for a water-light-storage-charging integrated system is applied to any one of the above-mentioned water-light-storage-charging integrated systems. The energy regulation method includes: Step S1: Obtain the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging terminal; Step S2: Calculate the power difference between the real-time power generation and the real-time load power consumption; Step S3: Set the peak power consumption threshold and the valley power consumption threshold of the three-phase power grid system; Step S4: Make a judgment based on the power difference and the real-time power consumption and select an energy regulation mode: When the power difference is greater than zero and the real-time power consumption is less than the peak power consumption threshold, select the internal energy storage mode, that is, the water-light power generation system supplies power to the load and simultaneously charges the energy storage module; When the power difference is greater than zero and the real-time power consumption is greater than the peak power consumption threshold, select the feedback mode, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and the energy storage module supplies power to the three-phase power grid system; When the power difference is less than zero and the real-time power consumption is less than the valley power consumption threshold, select the external energy storage mode, that is, the water-light power generation system supplies power to the load, the three-phase power grid system supplies power to the load, and simultaneously charges the energy storage module; When the power difference is less than zero and the real-time power consumption is greater than the valley power consumption threshold, select the power supply mode, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and at the same time the three-phase power grid system supplies power to the load.

[0013] Preferably, in the above solution, step S3 includes step S31: Obtain the annual power consumption data of the three-phase power grid system, calculate the average power consumption in the periods of 8:00 - 12:00 and 17:00 - 22:00 as the peak power consumption threshold, and calculate the average power consumption in the period of 23:00 - 7:00 the next day as the valley power consumption threshold.

[0014] Preferably, in the above solution, step S3 includes step S32: Set the peak power consumption threshold and the valley power consumption threshold of each month according to step S31.

[0015] Preferably, in the above solution, step S4 includes: Invoke the peak power consumption threshold and the valley power consumption threshold set for the corresponding month according to the time information of the real-time power consumption.

[0016] Compared with the existing technology, the present invention has the following beneficial effects:

[0017] 1. A water-light-storage-charging integrated system in the present invention includes a water-light power generation system, an energy storage module, a three-phase power electronic transformer, a data acquisition module and a control module, which can control the working states of the first switch, the second switch, the third switch and the fourth switch according to the power difference and the real-time power consumption, so as to select a variety of energy regulation modes, flexibly dispatch the energy supply of the water-light power generation system and the three-phase power grid system, and thus improve the integration degree of the water-light power generation system and the three-phase power grid system.

[0018] 2. The three-phase power electronic transformer in the present invention includes three single-phase power electronic transformers. The single-phase power electronic transformer is provided with multiple groups of AC-DC converters and DC-DC converters. The AC-DC converter and the DC-DC converter in the same group are connected in series. The AC-DC converters of the same single-phase power electronic transformer are connected in series. The DC-DC converters of different single-phase power electronic transformers are connected in parallel, which can provide multiple output terminals. Moreover, the power electronic transformer can reduce the volume of the system, reduce the ecological damage when the water-light power generation system is connected to the power grid, and meet the requirements of environmental protection.

[0019] 3. An energy regulation method of a water-light-storage-charging integrated system in the present invention can judge and select an energy regulation mode according to the power difference and the real-time power consumption. In the internal energy storage mode, the water-light power generation system supplies power to the load and simultaneously charges the energy storage module, and can store the surplus electric energy into the energy storage module; in the feedback mode, the water-light power generation system supplies power to the load, and the energy storage module supplies power to the three-phase power grid system, and can feedback the electric energy in the energy storage module to the three-phase power grid system during the peak power consumption stage to relieve the peak shaving pressure of the three-phase power grid system; in the external energy storage mode, the water-light power generation system supplies power to the load, the three-phase power grid system supplies power to the load, and simultaneously charges the energy storage module, and can store the electric energy in the three-phase power grid system into the energy storage module during the low power consumption stage; in the power supply mode, the water-light power generation system and the three-phase power grid system supply power to the load simultaneously, and can maintain the basic demand for power supply to the load.

[0020] 4. By using the electricity consumption data of the three-phase power grid system in the previous year, the present invention calculates the average electricity consumption in the periods of 8:00-12:00 and 17:00-22:00 as the peak electricity consumption threshold, calculates the average electricity consumption in the period of 23:00 to 7:00 the next day as the low valley electricity consumption threshold, and respectively sets the peak electricity consumption threshold and the low valley electricity consumption threshold for each month. According to the time information of the real-time electricity consumption, the set peak electricity consumption threshold and low valley electricity consumption threshold for the corresponding month are called, and the monthly energy can be accurately regulated to achieve the effect of peak shaving and valley filling. Description of the Drawings

[0021] Figure 1 It is a schematic electrical architecture diagram of a water-light-storage-charging integrated system of the present invention.

[0022] Figure 2 It is a schematic diagram of the electrical connection of a water-light-storage-charging integrated system according to the present invention.

[0023] Figure 3 It is a schematic diagram of the control circuit of a water-light-storage-charging integrated system according to the present invention.

[0024] Figure 4 It is a schematic diagram of the energy transmission in the internal energy storage mode of the present invention.

[0025] Figure 5 It is a schematic diagram of the energy transmission in the feedback mode of the present invention.

[0026] Figure 6 It is a schematic diagram of the energy transmission in the external energy storage mode of the present invention.

[0027] Figure 7 It is a schematic diagram of the energy transmission in the power supply mode of the present invention.

[0028] Figure 8 It is a schematic diagram of the electrical connection of a three-phase power electronic transformer according to the present invention.

[0029] Figure 9 It is a flowchart of the energy regulation method according to the present invention. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, "a number of" means one or more, "a plurality of" means more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the base number, and understandings such as "above", "below", "within", etc. include the base number. If terms such as "first", "second", "third" are described, they are only for descriptive purposes and for distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The embodiments of the present invention will be described below according to its overall structure.

[0034] As Figures 1 to 3 shown, the present invention discloses a water-light-storage-charging integrated system, including a water-light power generation system provided with a DC output terminal; a energy storage module E1~n# provided with an energy storage converter, and the energy storage converter is connected to the DC output terminal through a first switch ES; the input terminal of the power supply DC-DC converter is connected to the DC output terminal through a second switch WS, and the output terminal is connected to the load charging terminal; the input terminal of the three-phase power electronic transformer is connected to the three-phase power grid system, and the output terminal is connected to the load charging terminal through a third switch PS and is connected to the energy storage converter through a fourth switch RS; the data acquisition module is used to acquire the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging terminal; the control module is used to calculate the power difference between the real-time power generation and the real-time load power consumption, and control the working states of the first switch ES, the second switch WS, the third switch PS, and the fourth switch RS according to the power difference and the real-time power consumption. The load charging terminal in this embodiment includes parallel W1~n# charging ports and P1~n# charging ports, which can supply power to DC loads or supply power to AC loads after passing through a DC-AC converter; the energy storage converter is used for bidirectional power conversion and power control, can monitor parameters such as grid frequency and voltage in real time, quickly respond to adjust active / reactive power, suppress the impact of the energy fluctuation of the water-light power generation system on the three-phase power grid system, and improve the power supply reliability‌; by controlling the working states of each switch, multiple energy regulation modes can be selected, and the energy supply of the water-light power generation system and the three-phase power grid system can be flexibly scheduled, thereby improving the integration degree of the water-light power generation system and the three-phase power grid system.

[0035] Reference Figure 1, this embodiment further includes a DC bus, which has functions such as overcurrent protection, surge protection, suppressing voltage pulsation, and maintaining the DC side voltage stable, and can ensure the safe operation of the system. The power supply DC-DC converter is connected to the load charging end through the DC bus and can directly supply power to the W1~n# charging ports and P1~n# charging ports. The output terminals PO2~n of the three-phase power electronic transformer, the third switch PS, the DC bus, and the load charging end are connected in sequence, facilitating the control of the power supply state of the three-phase power grid system to the load charging end through the third switch PS. The output terminal PO1 of the three-phase power electronic transformer, the DC bus, the fourth switch RS, and the energy storage converter are connected in sequence. As Figure 4 shown, when the third switch PS and the fourth switch RS are both turned off, an island mode can be formed in which the water-light power generation system independently supplies power to the load; as Figure 6 shown, when the third switch PS and the fourth switch RS are both closed, the three-phase power grid system can supply power to the energy storage modules E1~n# and the load charging end at the same time; referring to Figure 7 , when the third switch PS is closed and the fourth switch RS is turned off, the three-phase power grid system can supply power to the load; referring to Figure 5 , when the third switch PS is turned off and the fourth switch RS is closed, the energy storage modules E1~n# supply power to the three-phase power grid system. In addition, the energy storage modules E1~n# are also provided with power supply terminals, which are only used to supply power to the load in case of emergency.

[0036] Furthermore, as Figure 8 shown, the three-phase power electronic transformer includes three single-phase power electronic transformers. The single-phase power electronic transformer is provided with multiple groups of AC-DC converters and DC-DC converters, and the AC-DC converter and the DC-DC converter in the same group are connected in series. Furthermore, the AC-DC converters of the same single-phase power electronic transformer are connected in series to connect to the A, B, and C ends of the three-phase power grid system, and the DC-DC converters of different single-phase power electronic transformers are connected in parallel to provide multiple output terminals to connect to the DC bus. It can be understood that when the energy storage modules E1~n# supply power to the three-phase power grid system, the DC-DC converter can adjust the direct current of the energy storage modules E1~n# to an adapted voltage, and the AC-DC converter can convert the direct current into alternating current and feedback it to the three-phase power grid system; when the three-phase power grid system supplies power to the energy storage modules E1~n# or the load, the AC-DC converter can rectify the alternating current of the three-phase power grid system into direct current, and the DC-DC converter can adjust the DC voltage level.

[0037] It should be noted that the water-light power generation system includes a hydroelectric power generation subsystem and a power generation AC-DC converter. The hydroelectric power generation subsystem is connected to the DC output terminal through the power generation AC-DC converter, and the power generation AC-DC converter is set as a single-phase inverter. The water-light power generation system also includes a photovoltaic power generation subsystem and a power generation DC-DC converter. The photovoltaic power generation subsystem is connected to the DC output terminal through the power generation DC-DC converter. It can be understood that the DC voltages transmitted to the DC output terminal after passing through the power generation AC-DC converter and the power generation DC-DC converter are the same. During the flood season, the power supply is mainly provided by the hydroelectric power generation subsystem, and during the dry season, the power supply is mainly provided by the photovoltaic power generation subsystem.

[0038] Continue to refer to Figure 9 , this embodiment discloses an energy regulation method for a water-light-storage-charging integrated system, which is applied to the above-mentioned water-light-storage-charging integrated system. The energy regulation method includes: Step S1: Obtain the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging end; Specifically, the data acquisition module respectively collects the real-time power consumption, real-time power generation, and real-time load power consumption data and uploads them to the control module.

[0039] Step S2: Calculate the power difference between the real-time power generation and the real-time load power consumption; Specifically, the control module obtains the power difference by subtracting the real-time load power consumption from the real-time power generation.

[0040] Step S3: Set the peak power consumption threshold and the valley power consumption threshold of the three-phase power grid system; Specifically, execute step S31: Obtain the power consumption data of the three-phase power grid system in the previous year, calculate the average power consumption in the time periods of 8:00-12:00 and 17:00-22:00 as the peak power consumption threshold, calculate the average power consumption in the time period of 23:00 - 7:00 the next day as the valley power consumption threshold, and store the annual thresholds in the control module; further, execute step S32: Set the peak power consumption threshold and the valley power consumption threshold for each month according to step S31, and store them in the control module monthly.

[0041] Step S4: Make a judgment based on the power difference and the real-time power consumption and select an energy regulation mode: When the power difference is greater than zero and the real-time power consumption is less than the peak power consumption threshold, select the internal energy storage mode, that is, the water-light power generation system supplies power to the load and simultaneously charges the energy storage module; Refer to Figure 4 , control the first switch ES to close, the second switch WS to close, the third switch PS to open, and the fourth switch RS to open, so as to store the surplus electric energy of the water-light power generation system into the energy storage module.

[0042] When the power difference is greater than zero and the real-time power consumption is greater than the peak power consumption threshold, the feedback mode is selected, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and the energy storage module supplies power to the three-phase power grid system; Reference Figure 5 , controlling the first switch ES to disconnect, the second switch WS to close, the third switch PS to disconnect, and the fourth switch RS to close, can feed the electric energy in the energy storage module back to the three-phase power grid system during the peak power consumption stage, alleviating the peak shaving pressure of the three-phase power grid system.

[0043] When the power difference is less than zero and the real-time power consumption is less than the low valley power consumption threshold, the external energy storage mode is selected, that is, the water-light power generation system supplies power to the load, the three-phase power grid system supplies power to the load, and at the same time charges the energy storage module; Reference Figure 6 , controlling the first switch ES to disconnect, the second switch WS to close, the third switch PS to close, and the fourth switch RS to close, can store the electric energy in the three-phase power grid system into the energy storage module during the low valley power consumption stage.

[0044] When the power difference is less than zero and the real-time power consumption is greater than the low valley power consumption threshold, the power supply mode is selected, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and at the same time the three-phase power grid system supplies power to the load.

[0045] Reference Figure 7 , controlling the first switch ES to disconnect, the second switch WS to close, the third switch PS to close, and the fourth switch RS to disconnect, can maintain the basic demand for power supply to the load.

[0046] Furthermore, the control module can call the peak power consumption threshold and low valley power consumption threshold stored in step S31 in the previous year for comparison and judgment with the real-time power consumption, which can achieve precise annual energy regulation; it can also call the peak power consumption threshold and low valley power consumption threshold set for the corresponding month stored in step S31 according to the time information of the real-time power consumption, which can achieve precise monthly energy regulation and achieve the effect of peak shaving and valley filling.

[0047] The foregoing description of the specific exemplary embodiments of the present invention is for the purpose of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made according to the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A water-light-storage-charging integrated system, characterized in that, Comprising: A water-light power generation system provided with a DC output terminal; An energy storage module provided with an energy storage converter, and the energy storage converter is connected to the DC output terminal through a first switch; A power supply DC-DC converter, the input terminal of which is connected to the DC output terminal through a second switch, and the output terminal is connected to a load charging terminal; A three-phase power electronic transformer, the input terminal of which is connected to a three-phase power grid system, the output terminal of which is connected to the load charging terminal through a third switch, and is connected to the energy storage converter through a fourth switch; A data acquisition module for acquiring the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging terminal; A control module for calculating the power difference between the real-time power generation and the real-time load power consumption, and controlling the working states of the first switch, the second switch, the third switch, and the fourth switch according to the power difference and the real-time power consumption.

2. The integrated water-light-storage-charging system according to claim 1, characterized in that, It further includes a DC bus. The power supply DC-DC converter is connected to the load charging terminal through the DC bus. The output terminal of the three-phase power electronic transformer, the third switch, the DC bus, and the load charging terminal are connected in sequence. The output terminal of the three-phase power electronic transformer, the DC bus, the fourth switch, and the energy storage converter are connected in sequence.

3. The integrated water-light-storage-charging system according to claim 2, wherein, The three-phase power electronic transformer includes three single-phase power electronic transformers. Each single-phase power electronic transformer is provided with multiple groups of AC-DC converters and DC-DC converters, and the AC-DC converter and the DC-DC converter in the same group are connected in series.

4. The integrated water-light-storage-charging system according to claim 3, wherein The AC-DC converters of the same single-phase power electronic transformer are connected in series, and the DC-DC converters of different single-phase power electronic transformers are connected in parallel.

5. The integrated water-light-storage-charging system according to claim 1, wherein The water-light power generation system includes a hydroelectric power generation subsystem and a power generation AC-DC converter, and the hydroelectric power generation subsystem is connected to the DC output terminal through the power generation AC-DC converter.

6. The integrated water-light-storage-charging system according to claim 5, wherein The water-light power generation system further includes a photovoltaic power generation subsystem and a power generation DC-DC converter, and the photovoltaic power generation subsystem is connected to the DC output terminal through the power generation DC-DC converter.

7. An energy regulation method for a water-light-storage-charging integrated system, characterized in that, Applied to the water-light-storage-charging integrated system according to any one of claims 1 to 6, the energy regulation method includes: Step S1: Obtain the real-time power consumption of the three-phase power grid system, the real-time power generation of the water-light power generation system, and the real-time load power consumption of the load charging terminal; Step S2: Calculate the power difference between the real-time power generation and the real-time load power consumption; Step S3: Set the peak power consumption threshold and the valley power consumption threshold of the three-phase power grid system; Step S4: Make a judgment and select an energy regulation mode according to the power difference and the real-time power consumption: When the power difference is greater than zero and the real-time power consumption is less than the peak power consumption threshold, select the internal energy storage mode, that is, the water-light power generation system supplies power to the load and simultaneously charges the energy storage module; When the difference in electricity quantity is greater than zero and the real-time electricity consumption is greater than the peak electricity consumption threshold, the feedback mode is selected, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and the energy storage module supplies power to the three-phase power grid system; When the difference in electricity quantity is less than zero and the real-time electricity consumption is less than the low valley electricity consumption threshold, the external energy storage mode is selected, that is, the water-light power generation system supplies power to the load, the three-phase power grid system supplies power to the load, and at the same time, the energy storage module is charged; When the difference in electricity quantity is less than zero and the real-time electricity consumption is greater than the low valley electricity consumption threshold, the power supply mode is selected, that is, the water-light power generation system supplies power to the load, stops charging the energy storage module, and at the same time, the three-phase power grid system supplies power to the load.

8. The energy regulation method of a water-light-storage-charging integrated system according to claim 7, characterized in that, Step S3 includes step S31: Obtain the electricity consumption data of the three-phase power grid system in the previous year, calculate the average electricity consumption in the periods of 8:00-12:00 and 17:00-22:00 as the peak electricity consumption threshold, and calculate the average electricity consumption in the period of 23:00 to 7:00 the next day as the low valley electricity consumption threshold.

9. The energy regulation method of a water-light-storage-charging integrated system according to claim 8, characterized in that, Step S3 includes step S32: Set the peak electricity consumption threshold and the low valley electricity consumption threshold for each month according to step S31.

10. The energy regulation method of a water-light-storage-charging integrated system according to claim 9, characterized in that, Step S4 includes: Calling the peak electricity consumption threshold and the low valley electricity consumption threshold set for the corresponding month according to the time information of the real-time electricity consumption.

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