Wind power generation energy storage system

Abstract

The utility model discloses a wind power generation energy storage system, which relates to the technical field of power generation, and comprises a rectifying and filtering module, an input end of which is connected with an output end of a wind power generation system; the first detection module and the energy storage battery are connected with the output end of the rectification filtering module; the input end of the inverter is connected with the energy storage battery; the first switching circuit comprises a first switch, one end of the first switch is connected with the output end of the inverter, the other end of the first switch is connected with the output end of the wind power generation system and a primary coil of the transformer, and a secondary coil of the transformer is connected with a power grid; and the control module is respectively connected with the first detection module, the first switching circuit and the inverter. When the generating capacity is lower than the first preset threshold value, the control module controls the first switch to be switched on and controls the inverter to work so as to convert the power supply of the energy storage battery into alternating current, output the alternating current to the primary coil of the transformer and finally merge the alternating current into the power grid, and the problem that when the wind power is weak, the generating capacity of the wind power generation system is small is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power generation technical field especially relates to a wind power generation energy storage system. BACKGROUND

[0002] Wind power generation is a kind of power generation system that converts wind energy into electric energy. It uses wind to push the blades to rotate, and then drives the generator to rotate, and generates electricity through electromagnetic induction principle. Wind power generation is a more common power generation method today. But because the wind power output has intermittency, randomness and annual periodicity, it is a major test to the power grid. When the wind is strong, the power generation of wind power generation system is too much;When the wind is weak, the power generation of wind power generation system is too little. SUMMARY

[0003] The utility model discloses a wind power generation energy storage system, when the power generation is less than the first preset threshold value, then control module controls the first switch to close through the first switch circuit, and controls the inverter to work, to convert the power supply of energy storage battery into alternating current and then output to the primary coil of transformer, finally and into the power grid, solve the problem of the little power generation of wind power generation system when the wind is weak.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] One aspect of the utility model discloses a wind power generation energy storage system, the energy storage system includes: rectification filter module, the input end of rectification filter module is connected with the output end of wind power generation system, and rectification filter module outputs first power supply and first place respectively;First detection module, the input end of first detection module is connected with the positive output end of rectification filter module;Energy storage battery, the positive pole of energy storage battery is connected with the input end of first detection module and the positive output end of rectification filter module;Inverter, the input end of inverter is connected with the positive pole of energy storage battery;First switch circuit, the first switch circuit includes first switch, one end of first switch is connected with the output end of inverter, and the other end of first switch is connected with the output end of wind power generation system and the primary coil of transformer, and the secondary coil of transformer is connected with the power grid;Control module, control module is connected with first detection module, first switch circuit and inverter respectively, and control module detects the power generation of wind power generation system through first detection module;When the power generation is less than the first preset threshold value, then control module controls the first switch to close through the first switch circuit, and controls the inverter to work, to convert the power supply of energy storage battery into alternating current and then output to the primary coil of transformer.

[0006] In some embodiments, the first switch employs a first relay, and the first switch circuit further comprises a first transistor, a first diode and a first resistor, a collector of the first transistor is connected to one end of a coil end of the first relay and a positive pole of the first diode, the other end of the coil end of the first relay is connected to a negative pole of the first diode and one end of the first resistor, the other end of the first resistor is connected to a second power supply, a base of the first transistor is connected to the control module, an emitter of the first transistor is connected to a second site, a contactor of the first relay is connected to an output end of the inverter, and the other end of the contactor of the first relay is connected to an output end of the wind power generation system and a primary coil of the transformer.

[0007] In some embodiments, the first detection module comprises a second transistor, an optical coupler, a first capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, one end of the second resistor is connected to a positive pole output end of the rectification and filtering module, the other end of the second resistor is connected to one end of the first capacitor, one end of the third resistor and one end of the fifth resistor, the other end of the third resistor is connected to one end of the fourth resistor and a base of the second transistor, the other end of the fifth resistor is connected to a collector of the second transistor, an emitter of the second transistor is connected to a light-emitting side input end of the optical coupler, a light-emitting side output end of the optical coupler, the other end of the fourth resistor and the other end of the first capacitor are connected to a first site, a light-receiving side input end of the optical coupler is connected to a second power supply through the sixth resistor, a light-receiving side output end of the optical coupler is connected to one end of the seventh resistor and the control module, and the other end of the seventh resistor is connected to a second site.

[0008] In some embodiments, the energy storage system further comprises a second detection module which is the same as the circuit of the first detection module, and the second detection module is connected to the control module and the energy storage battery respectively, and the control module detects the power of the energy storage battery through the second detection module; the energy storage system further comprises a second switch circuit, and the second switch circuit comprises a third transistor, a second relay, a second diode and an eighth resistor, a collector of the third transistor is connected to one end of a coil end of the second relay and a positive pole of the second diode, the other end of the coil end of the second relay is connected to a negative pole of the second diode and one end of the eighth resistor, the other end of the eighth resistor is connected to a second power supply, a base of the third transistor is connected to the control module, an emitter of the third transistor is connected to a second site, one end of a contactor of the second relay is connected to an input end of the first detection module and a positive pole output end of the rectification and filtering module, and the other end of the contactor of the second relay is connected to a positive pole of the energy storage battery and the second detection module.

[0009] In some embodiments, the energy storage system further comprises a third diode, a positive electrode of the third diode is connected to the other end of the contactor of the second relay, and a negative electrode of the third diode is connected to the positive electrode of the energy storage battery and the second detection module.

[0010] In some embodiments, the energy storage system further comprises a second capacitor, a positive electrode of the second capacitor is connected to the negative electrode of the third diode, the positive electrode of the energy storage battery and the second detection module, and a negative electrode of the second capacitor is connected to the first site.

[0011] In some embodiments, the energy storage system further comprises a prompt module, the prompt module comprises a fourth triode, a prompt lamp and a ninth resistor, a collector of the fourth triode is connected to the second power supply through the ninth resistor, a base of the fourth triode is connected to the control module, an emitter of the fourth triode is connected to a positive electrode of the prompt lamp, and a negative electrode of the prompt lamp is connected to the second site.

[0012] In some embodiments, the energy storage system further comprises a display module, the display module is connected to the control module.

[0013] In some embodiments, the energy storage system further comprises a first manual switch and a second manual switch, the first manual switch is arranged between the rectification and filtering module and the wind power generation system, and the second manual switch is arranged between the contactor of the first relay and the primary coil of the transformer.

[0014] In some embodiments, the rectification and filtering module comprises a rectification bridge, a tenth resistor, a third capacitor and a fourth capacitor, input ends of the rectification bridge are connected to output ends of the wind power generation system through the first manual switch, a positive electrode output end of the rectification bridge is connected to one end of the third capacitor and one end of the fourth capacitor through the tenth resistor, and the other end of the third capacitor and the other end of the fourth capacitor are connected to the first site.

[0015] The wind power generation energy storage system has at least the following beneficial effects: when the power generation amount is lower than the first preset threshold value, the contactor of the first relay is controlled to be closed, the contactor of the second relay is controlled to be opened, and the inverter is controlled to work, so that the power supply of the energy storage battery is converted into alternating current and then output to the primary coil of the transformer, and finally integrated into the power grid, thereby solving the problem of low power generation amount of the wind power generation system when the wind power is weak.

[0016] It should be understood that the foregoing general description and the following detailed description are only examples and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a principle block diagram of the energy storage system according to the embodiment;

[0019] Figure 2 is a first partial circuit principle diagram of the energy storage system according to the embodiment;

[0020] Figure 3 is a second partial circuit principle diagram of the energy storage system according to the embodiment. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] The terms "first", "second", "third", are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features. Thus, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0024] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these examples are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of the example implementations to those skilled in the art. The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure. Like reference numerals in the drawings represent like parts throughout the various drawings, and thus a repeated description of the same will be omitted.

[0025] The technical solutions of the embodiments of the present application will be briefly described below:

[0026] According to some embodiments, as Figure 1 As shown in the figure, the present application provides a wind power energy storage system, the energy storage system comprises:

[0027] Rectification filtering module, the input end of rectification filtering module is connected with the output end of wind power generation system, and rectification filtering module outputs first power supply and first site respectively;

[0028] The first detection module is connected with the positive output end of the rectification filtering module;

[0029] Energy storage battery, the positive pole of energy storage battery is connected with the input end of the first detection module and the positive output end of the rectification filtering module;

[0030] Inverter, the input end of inverter is connected with the positive pole of energy storage battery;

[0031] The first switching circuit includes a first switch, one end of which is connected to the output terminal of the inverter, and the other end of which is connected to the output terminal of the wind power generation system and the primary coil of the transformer. The secondary coil of the transformer is connected to the power grid.

[0032] The control module is connected to the first detection module, the first switching circuit and the inverter respectively. The control module detects the power generation of the wind power generation system through the first detection module.

[0033] The working principle of the above embodiment is as follows: when the power generation is lower than the first preset threshold, the control module controls the first switch to close through the first switching circuit and controls the inverter to work, so as to convert the power of the energy storage battery into AC power and output it to the primary coil of the transformer, and finally connect it to the grid, thus solving the problem of low power generation of the wind power generation system when the wind is weak.

[0034] When the power generation is sufficient, the control module controls the first switch to open through the first switching circuit and controls the inverter to stop working.

[0035] The following is in conjunction with the appendix to this instruction manual. Figures 1 to 3 The preferred embodiments of this disclosure will be further described in detail below.

[0036] According to some embodiments, such as Figures 2 to 3 As shown, the first switch uses a first relay K1, and the first switch circuit also includes a first transistor Q1, a first diode D1, and a first resistor R1, with the specific connection method as follows.

[0037] The collector of the first transistor Q1 is connected to one end of the coil of the first relay K1 and the positive terminal of the first diode D1. The other end of the coil of the first relay K1 is connected to the negative terminal of the first diode D1 and one end of the first resistor R1. The other end of the first resistor R1 is connected to the second power supply. The base of the first transistor Q1 is connected to the control module. The emitter of the first transistor Q1 is connected to the second ground. One end of the contactor of the first relay K1 is connected to the output terminal of the inverter. The other end of the contactor of the first relay K1 is connected to the output terminal of the wind power generation system and the primary coil of the transformer.

[0038] The working principle of the above embodiment is as follows: when the power generation is lower than the first preset threshold, the control module controls the contactor of the first relay K1 to close through the first transistor Q1 and controls the inverter to work, so as to convert the power of the energy storage battery into AC power and output it to the primary coil of the transformer, and finally connect it to the grid, thus solving the problem of low power generation of the wind power generation system when the wind is weak.

[0039] When the power generation is sufficient, the control module controls the contactor of the first relay K1 to disconnect through the first transistor Q1, and controls the inverter to stop working.

[0040] The first diode D1 is used for freewheeling when the first relay K1 is powered off.

[0041] According to some embodiments, as shown in Figure 2 The first detection module includes a second transistor Q2, an optocoupler U1, a first capacitor C1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7, which are connected as follows,

[0042] One end of the second resistor R2 is connected to the positive output end of the rectification and filtering module, the other end of the second resistor R2 is connected to one end of the first capacitor C1, one end of the third resistor R3, and one end of the fifth resistor R5, the other end of the third resistor R3 is connected to one end of the fourth resistor R4 and the base of the second transistor Q2, the other end of the fifth resistor R5 is connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is connected to the light-emitting side input end of the optocoupler U1, the light-emitting side output end of the optocoupler U1, the other end of the fourth resistor R4, and the other end of the first capacitor C1 are connected to the first ground, the light-receiving side input end of the optocoupler U1 is connected to the second power supply through the sixth resistor R6, the light-receiving side output end of the optocoupler U1 is connected to one end of the seventh resistor R7 and the control module, and the other end of the seventh resistor R7 is connected to the second ground.

[0043] The second resistor R2, the third resistor R3, and the fourth resistor R4 are used for voltage division, the fifth resistor R5 is used for current limiting, the first capacitor C1 is used for filtering, and the optocoupler U1 has an isolation detection effect to prevent the voltage fluctuation on the high-voltage side from breaking the chip in the control module on the low-voltage side.

[0044] According to some embodiments, as shown in Figures 2 to 3 The energy storage system further includes a second detection module identical to the circuit of the first detection module, the second detection module is connected to the control module and the energy storage battery respectively, and the control module detects the power of the energy storage battery through the second detection module.

[0045] The energy storage system further includes a second switching circuit, which includes a third transistor Q3, a second relay K2, a second diode D2, and an eighth resistor R8, which are connected as follows,

[0046] The collector of the third transistor Q3 is connected to one end of the coil end of the second relay K2 and the positive electrode of the second diode D2, the other end of the coil end of the second relay K2 is connected to the negative electrode of the second diode D2 and one end of the eighth resistor R8, the other end of the eighth resistor R8 is connected to the second power supply, the base of the third transistor Q3 is connected to the control module, the emitter of the third transistor Q3 is connected to the second ground, one end of the contactor of the second relay K2 is connected to the input end of the first detection module and the positive output end of the rectification and filtering module, and the other end of the contactor of the second relay K2 is connected to the positive electrode of the energy storage battery and the second detection module.

[0047] The working principle of the above embodiment is that when the power generation is lower than the first preset threshold, the control module controls the contactor of the first relay K1 to close through the first triode Q1, controls the contactor of the second relay K2 to open through the third triode Q3, and controls the inverter to work to convert the power supply of the energy storage battery into alternating current and then output to the primary coil of the transformer, and finally into the power grid, thereby solving the problem of low power generation of the wind power generation system when the wind is weak. When the power generation is higher than the first preset threshold and lower than the second preset threshold, the control module controls the contactor of the first relay K1 to open through the first triode Q1, controls the contactor of the second relay K2 to open through the third triode Q3, and controls the inverter to stop working, at this time, the power of wind power generation just meets the power required by the power grid. When the power generation is higher than the first preset threshold and the second preset threshold, the control module controls the contactor of the first relay K1 to open through the first triode Q1, controls the contactor of the second relay K2 to close through the third triode Q3, and controls the inverter to stop working, at this time, the power of wind power generation is supplied to the power grid and the energy storage battery respectively, thereby solving the problem of excessive power generation of the wind power generation system when the wind is strong.

[0048] According to some embodiments, as shown in Figure 2 The energy storage system further includes a third diode D3, the positive electrode of the third diode D3 is connected to the other end of the contactor of the second relay K2, and the negative electrode of the third diode D3 is connected to the positive electrode of the energy storage battery and the second detection module.

[0049] When the wind power generation is low, the third diode D3 is added to ensure the accuracy of the first detection module in detecting the wind power generation.

[0050] Further, as shown in Figure 2 The energy storage system further includes a second capacitor C2, the positive electrode of the second capacitor C2 is connected to the negative electrode of the third diode D3, the positive electrode of the energy storage battery and the second detection module, and the negative electrode of the second capacitor C2 is connected to the first ground.

[0051] According to some embodiments, as shown in Figure 3 The energy storage system further includes a prompt module, the prompt module includes a fourth triode Q4, a prompt lamp LED and a ninth resistor R9, and the specific connection mode is as follows,

[0052] The collector of the fourth triode Q4 is connected to the second power supply through the ninth resistor R9, the base of the fourth triode Q4 is connected to the control module, the emitter of the fourth triode Q4 is connected to the positive electrode of the prompt lamp LED, and the negative electrode of the prompt lamp LED is connected to the second ground.

[0053] When the power of the energy storage battery is lower than the lower limit value, the control module controls the prompt light LED to be on through the fourth triode Q4.

[0054] According to some embodiments, as shown in Figure 3 The energy storage system further comprises a display module, which is connected with the control module.

[0055] The display module is used to display the power of the energy storage battery in real time.

[0056] According to some embodiments, as shown in Figure 2 The energy storage system further comprises a first manual switch S1 and a second manual switch S2. The first manual switch S1 is arranged between the rectification filtering module and the wind power generation system, and the second manual switch S2 is arranged between the contactor of the first relay K1 and the primary coil of the transformer. The first manual switch S1 and the second manual switch S2 are used to forcibly shut down in an emergency.

[0057] According to some embodiments, as shown in Figure 2 The rectification filtering module comprises a rectification bridge DB, a tenth resistor R10, a third capacitor C3 and a fourth capacitor C4, which are connected in the following manner,

[0058] The input end of the rectification bridge DB is connected with the output end of the wind power generation system through the first manual switch S1. The positive output end of the rectification bridge DB is connected with one end of the third capacitor C3 and one end of the fourth capacitor C4 through the tenth resistor R10. The other end of the third capacitor C3 and the other end of the fourth capacitor C4 are connected with the first ground point.

[0059] When the power generation is lower than the first preset threshold value, the control module controls the contactor of the first relay K1 to be closed through the first triode Q1, controls the contactor of the second relay K2 to be opened through the third triode Q3, and controls the inverter to work. The inverter converts the power supply of the energy storage battery into alternating current and then outputs it to the primary coil of the transformer, and finally integrates into the power grid, thereby solving the problem of low power generation of the wind power generation system when the wind is weak.

[0060] When the power generation is higher than the first preset threshold value and lower than the second preset threshold value, the control module controls the contactor of the first relay K1 to be opened through the first triode Q1, controls the contactor of the second relay K2 to be opened through the third triode Q3, and controls the inverter to stop working. At this time, the electric energy of the wind power generation is just enough to meet the electric energy required by the power grid.

[0061] When the power generation is higher than the first preset threshold and the second preset threshold, the control module controls the contactor of the first relay K1 to be opened through the first triode Q1, controls the contactor of the second relay K2 to be closed through the third triode Q3, and controls the inverter to stop working. At this time, the electric energy of the wind power generation is supplied to the power grid and the energy storage battery respectively, thereby solving the problem of excessive power generation of the wind power generation system when the wind is strong.

[0062] In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive, and that the use of such terms is not intended to limit the scope of the present disclosure. Since the present disclosure can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be broadly interpreted within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A wind power energy storage system, characterized in that, The energy storage system comprises: a rectification filter module, an input end of the rectification filter module being connected to an output end of a wind power generation system, the rectification filter module outputting a first power supply and a first site respectively; a first detection module, an input end of the first detection module being connected to a positive output end of the rectification filter module; an energy storage battery, a positive pole of the energy storage battery being connected to the input end of the first detection module and the positive output end of the rectification filter module; an inverter, an input end of the inverter being connected to the positive pole of the energy storage battery; a first switch circuit, the first switch circuit comprising a first switch, one end of the first switch being connected to an output end of the inverter, the other end of the first switch being connected to an output end of the wind power generation system and a primary coil of a transformer, a secondary coil of the transformer being connected to a power grid; a control module, the control module being connected to the first detection module, the first switch circuit and the inverter respectively, the control module detecting a power generation amount of the wind power generation system through the first detection module; when the power generation amount is lower than a first preset threshold, the control module controls the first switch to be closed through the first switch circuit, and controls the inverter to work, so as to convert the power supply of the energy storage battery into alternating current and then output to the primary coil of the transformer.

2. The energy storage system of claim 1, wherein, The first switch adopts a first relay, the first switch circuit further comprises a first triode, a first diode and a first resistor, a coil end of the first relay on one side being connected to a positive pole of the first diode and a collector of the first triode, a coil end of the first relay on the other side being connected to a negative pole of the first diode and one end of the first resistor, the other end of the first resistor being connected to a second power supply, a base of the first triode being connected to the control module, an emitter of the first triode being connected to a second site, a contactor of the first relay on one side being connected to the output end of the inverter, a contactor of the first relay on the other side being connected to the output end of the wind power generation system and the primary coil of the transformer.

3. The energy storage system of claim 1, wherein, The first detection module comprises a second triode, an optical coupler, a first capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, one end of the second resistor being connected to the positive output end of the rectification filter module, the other end of the second resistor being connected to one end of the first capacitor, one end of the third resistor and one end of the fifth resistor, the other end of the third resistor being connected to one end of the fourth resistor and a base of the second triode, the other end of the fifth resistor being connected to a collector of the second triode, an emitting side input end of the optical coupler being connected to an emitter of the second triode, an emitting side output end of the optical coupler, the other end of the fourth resistor and the other end of the first capacitor being connected to a first site, a light-receiving side input end of the optical coupler being connected to a second power supply through the sixth resistor, a light-receiving side output end of the optical coupler being connected to one end of the seventh resistor and the control module, the other end of the seventh resistor being connected to a second site.

4. The energy storage system of claim 3, wherein, The energy storage system further comprises a second detection module identical to the circuit of the first detection module, the second detection module is connected to the control module and the energy storage battery respectively, and the control module detects the power of the energy storage battery through the second detection module; The energy storage system further comprises a second switch circuit, the second switch circuit comprises a third transistor, a second relay, a second diode and an eighth resistor, the collector of the third transistor is connected to one end of the coil of the second relay and the positive electrode of the second diode, the other end of the coil of the second relay is connected to the negative electrode of the second diode and one end of the eighth resistor, the other end of the eighth resistor is connected to the second power supply, the base of the third transistor is connected to the control module, the emitter of the third transistor is connected to the second site, one end of the contactor of the second relay is connected to the input end of the first detection module and the positive output end of the rectification and filtering module, and the other end of the contactor of the second relay is connected to the positive electrode of the energy storage battery and the second detection module.

5. The energy storage system of claim 4, wherein, The energy storage system further comprises a third diode, the positive electrode of the third diode is connected to the other end of the contactor of the second relay, and the negative electrode of the third diode is connected to the positive electrode of the energy storage battery and the second detection module.

6. The energy storage system of claim 5, wherein, The energy storage system further comprises a second capacitor, the positive electrode of the second capacitor is connected to the negative electrode of the third diode, the positive electrode of the energy storage battery and the second detection module, and the negative electrode of the second capacitor is connected to the first site.

7. The energy storage system of claim 1, wherein, The energy storage system further comprises a prompt module, the prompt module comprises a fourth transistor, a prompt lamp and a ninth resistor, the collector of the fourth transistor is connected to the second power supply through the ninth resistor, the base of the fourth transistor is connected to the control module, the emitter of the fourth transistor is connected to the positive electrode of the prompt lamp, and the negative electrode of the prompt lamp is connected to the second site.

8. The energy storage system of claim 1, wherein, The energy storage system further comprises a display module, the display module is connected to the control module.

9. The energy storage system of claim 2, wherein, The energy storage system further comprises a first manual switch and a second manual switch, the first manual switch is arranged between the rectification and filtering module and the wind power generation system, and the second manual switch is arranged between the contactor of the first relay and the primary coil of the transformer.

10. The energy storage system of claim 9, wherein, The rectification and filtering module comprises a rectification bridge, a tenth resistor, a third capacitor and a fourth capacitor, the input end of the rectification bridge is connected to the output end of the wind power generation system through the first manual switch, the positive output end of the rectification bridge is connected to one end of the third capacitor and one end of the fourth capacitor through the tenth resistor, and the other end of the third capacitor and the other end of the fourth capacitor are connected to the first site.

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