Intelligent power supply system

Abstract

The utility model discloses an intelligent power supply system, which relates to the technical field of power supply and comprises a photovoltaic power generation system and a wind power generation system. The system comprises a control module, a first detection circuit and a second detection circuit, the first detection circuit is connected with a photovoltaic power generation system, the second detection circuit is connected with a wind power generation system, and the control module is connected with the first detection circuit and the second detection circuit; the first switch circuit comprises a first relay, the second switch circuit comprises a second relay, the control module is respectively connected with a coil end of the first relay and a coil end of the second relay, and a contactor of the first relay is respectively connected with the photovoltaic power generation system and the park energy storage module. A contactor of the second relay is connected with the wind power generation system and the park energy storage module. The control module controls the first switching circuit and the second switching circuit to switch power supply according to the electric quantity of the first energy storage module and the second energy storage module, so that the stability of power supply in the park is improved, and the problem of energy intermittence is solved.

Description

A smart power supply system Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to an intelligent power supply system. Background Technology

[0002] In the global wave of carbon neutrality, zero-carbon industrial parks, as integrated carriers of "industrial agglomeration + low-carbon technologies," have become a key breakthrough in solving the problems of high energy consumption and high emissions. The industrial sector, as a major source of carbon emissions, urgently needs to achieve a green transformation through structural reforms. The construction of zero-carbon industrial parks will help promote the green and low-carbon transformation of economic and social development, laying the foundation for achieving carbon neutrality goals.

[0003] A zero-carbon industrial park refers to an industrial cluster area within a certain region that achieves near-zero total greenhouse gas emissions by comprehensively utilizing low-carbon and zero-carbon technologies and management measures in multiple fields such as energy, industry, construction, and transportation.

[0004] The most significant characteristic of zero-carbon industrial parks is their focus on replacing energy sources with renewable energy as much as possible. This involves the large-scale application of clean energy sources such as solar, wind, hydro, and biomass energy to reduce reliance on traditional fossil fuels. For example, rooftop photovoltaic power stations can be built within the park, utilizing the rooftop space of buildings to install solar panels and convert solar energy into electricity for the park's use; alternatively, wind farms can be constructed in suitable surrounding areas to provide power support for the park. However, relying solely on photovoltaic or wind power generation can lead to unstable and intermittent power supply issues due to prolonged cloudy or low-wind conditions. Summary of the Invention

[0005] The purpose of this utility model is to provide an intelligent power supply system that combines photovoltaic power generation and wind power generation, and is equipped with multiple energy storage modules and intelligent switching circuits for power supply, thereby improving the stability of power supply in the park and solving the problem of energy intermittency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] One aspect of this utility model provides an intelligent power supply system, the power supply system comprising: a photovoltaic power generation system and a wind power generation system; a control module, a first detection circuit and a second detection circuit, wherein the detection input terminal of the first detection circuit is connected to the photovoltaic power generation system, the detection input terminal of the second detection circuit is connected to the wind power generation system, and the control module is connected to the detection output terminals of the first detection circuit and the second detection circuit respectively; a first switching circuit and a second switching circuit, wherein the first switching circuit includes a first relay, the second switching circuit includes a second relay, the control module is connected to the coil terminals of the first relay and the second relay respectively, the contactors of the first relay are connected to the photovoltaic power generation system and the park energy storage module respectively, and the contactors of the second relay are connected to the wind power generation system and the park energy storage module respectively.

[0008] In some embodiments, the photovoltaic power generation system further includes a photovoltaic power generation module, a first inverter, a first transformer, and a first energy storage module. The output terminal of the photovoltaic power generation module is connected to the input terminal of the first energy storage module and the first inverter. The output terminal of the first inverter is connected to the primary coil of the first transformer. The secondary coil of the first transformer is connected to the contactor of the first relay.

[0009] In some embodiments, the photovoltaic power generation system further includes a second inverter and a second transformer. The input terminal of the second inverter is connected to the first energy storage module, the output terminal of the second inverter is connected to the primary coil of the second transformer, and the secondary coil of the second transformer is connected to the first detection circuit.

[0010] In some embodiments, the photovoltaic power generation system further includes a first manual switch and a second manual switch. One end of the first manual switch is connected to the output terminal of the photovoltaic power generation module, and the other end of the first manual switch is connected to the input terminals of the first energy storage module and the first inverter. The second manual switch is disposed between the second inverter and the second transformer.

[0011] In some embodiments, the wind power generation system includes a wind power generation module, a rectifier, a third inverter, a third transformer, and a second energy storage module. The output terminal of the wind power generation module is connected to the input terminal of the rectifier. The output terminal of the rectifier is connected to the input terminals of the second energy storage module and the third inverter. The output terminal of the third inverter is connected to the primary coil of the third transformer. The secondary coil of the third transformer is connected to the contactor of the second relay.

[0012] In some embodiments, the wind power generation system further includes a fourth inverter and a fourth transformer, the input terminal of the fourth inverter is connected to the second energy storage module, the output terminal of the fourth inverter is connected to the primary coil of the fourth transformer, and the secondary coil of the fourth transformer is connected to the second detection circuit.

[0013] In some embodiments, the wind power generation system further includes a third manual switch and a fourth manual switch. One end of the third manual switch is connected to the output terminal of the rectifier, and the other end of the third manual switch is connected to the input terminal of the second energy storage module and the third inverter. The fourth manual switch is disposed between the fourth inverter and the fourth transformer.

[0014] In some embodiments, the first detection circuit and the second detection circuit have the same circuit structure. The first detection circuit includes a rectifier bridge, an optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, and a second capacitor. The input terminal of the rectifier bridge is connected to the secondary coil of the second transformer. The positive output terminal of the rectifier bridge outputs a first power supply to be tested through the first resistor. One end of the first capacitor, one end of the second capacitor, and one end of the second resistor are connected to the first power supply. The negative output terminal of the rectifier bridge serves as a first ground circuit. The other ends of the first capacitor and the second capacitor are connected to the first ground. The other end of the second resistor is connected to one end of the third resistor and one end of the fourth resistor. The other end of the third resistor is connected to the first ground. The other end of the fourth resistor is connected to the light-emitting side input terminal of the optocoupler. The light-emitting side output terminal of the optocoupler is connected to the first ground. The light-receiving side input terminal of the optocoupler is connected to the second power supply through the fifth resistor. The light-receiving side output terminal of the optocoupler is connected to the control module.

[0015] In some embodiments, the first switching circuit and the second switching circuit have the same circuit structure. The first switching circuit further includes a transistor, a diode, a sixth resistor, a seventh resistor, and an eighth resistor. The base of the transistor is connected to one end of the sixth resistor and one end of the seventh resistor. The other end of the sixth resistor is connected to the control module. The other end of the seventh resistor and the emitter of the transistor are connected to a second ground. The collector of the transistor is connected to one end of the coil of the first relay and the anode of the diode. The cathode of the diode is connected to the other end of the coil of the first relay and one end of the eighth resistor. The other end of the eighth resistor is connected to a second power supply.

[0016] An intelligent power supply system according to an embodiment of this utility model has at least the following beneficial effects: This application combines photovoltaic power generation and wind power generation, and sets up a first energy storage module for photovoltaic power generation, a second energy storage module for wind power generation, and a park energy storage module for park use, so that each part has the function of energy storage and storage, improving the stability of power supply. It also includes a control module, a first detection circuit, a second detection circuit, a first switching circuit, and a second switching circuit. The control module detects the first energy storage module for photovoltaic power generation through the first detection circuit, and detects the second energy storage module for wind power generation through the second detection circuit. The control module controls the first switching circuit and the second switching circuit to switch power supply according to the power of the first and second energy storage modules, improving the stability of park power supply and solving the problem of energy intermittency.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a simplified diagram of the power supply structure of the intelligent power supply system according to an embodiment;

[0020] Figure 2 is a schematic block diagram of a photovoltaic power generation system according to an embodiment;

[0021] Figure 3 is a schematic block diagram of a wind power generation system according to an embodiment;

[0022] Figure 4 is a circuit diagram of the first detection circuit and the first switching circuit according to an embodiment. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0027] The technical solutions of the embodiments of this application are briefly described below:

[0028] According to some embodiments, as shown in Figures 1 to 3, this application provides an intelligent power supply system, the power supply system comprising:

[0029] Photovoltaic power generation systems and wind power generation systems;

[0030] The system includes a control module, a first detection circuit, and a second detection circuit. The detection input terminal of the first detection circuit is connected to the photovoltaic power generation system, and the detection input terminal of the second detection circuit is connected to the wind power generation system. The control module is connected to the detection output terminals of the first detection circuit and the second detection circuit, respectively.

[0031] The first switching circuit includes a first relay K1, and the second switching circuit includes a second relay K2. The control module is connected to the coil terminals of the first relay K1 and the second relay K2, respectively. The contactor K11 of the first relay K1 is connected to the photovoltaic power generation system and the park energy storage module, respectively. The contactor K21 of the second relay K2 is connected to the wind power generation system and the park energy storage module, respectively.

[0032] The working principle of the above embodiment is as follows: the control module detects the energy storage capacity of the first energy storage module of photovoltaic power generation through the first detection circuit, and the control module detects the energy storage capacity of the second energy storage module of wind power generation through the second detection circuit. When the energy storage capacity of the first energy storage module is lower than a preset threshold, the control module controls the contactor K11 of the first relay K1 to turn off through the first switching circuit, and controls the contactor K21 of the second relay K2 to close through the second switching circuit, so that the second energy storage module of wind power generation supplies power and the first energy storage module of photovoltaic power generation is charged.

[0033] When the energy storage capacity of the second energy storage module is lower than the preset threshold, the control module controls the contactor K21 of the second relay K2 to turn off through the second switching circuit, and controls the contactor K11 of the first relay K1 to close through the first switching circuit, so that the first energy storage module of photovoltaic power generation provides power and the second energy storage module of wind power generation is charged.

[0034] The preferred embodiments of this disclosure will be further described in detail below with reference to Figures 1 to 4.

[0035] According to some embodiments, as shown in Figure 2, the photovoltaic power generation system further includes a photovoltaic power generation module, a first inverter, a first transformer, and a first energy storage module, with the specific connection method as follows.

[0036] The output terminal of the photovoltaic power generation module is connected to the input terminal of the first energy storage module and the first inverter. The output terminal of the first inverter is connected to the primary coil of the first transformer. The secondary coil of the first transformer is connected to the contactor K11 of the first relay K1.

[0037] Furthermore, as shown in Figure 2, the photovoltaic power generation system also includes a second inverter and a second transformer, and their specific connection methods are as follows:

[0038] The input terminal of the second inverter is connected to the first energy storage module, the output terminal of the second inverter is connected to the primary coil of the second transformer, and the secondary coil of the second transformer is connected to the first detection circuit.

[0039] Furthermore, as shown in Figure 2, the photovoltaic power generation system also includes a first manual switch S1 and a second manual switch S2, and their specific connection methods are as follows:

[0040] One end of the first manual switch S1 is connected to the output end of the photovoltaic power generation module, and the other end of the first manual switch S1 is connected to the input end of the first energy storage module and the first inverter. The second manual switch S2 is located between the second inverter and the second transformer.

[0041] In some embodiments, the first manual switch S1 and the second manual switch S2 are circuit breakers.

[0042] According to some embodiments, as shown in Figure 3, the wind power generation system includes a wind power generation module, a rectifier, a third inverter, a third transformer, and a second energy storage module, and their specific connection methods are as follows.

[0043] The output terminal of the wind power generation module is connected to the input terminal of the rectifier. The output terminal of the rectifier is connected to the input terminals of the second energy storage module and the third inverter. The output terminal of the third inverter is connected to the primary coil of the third transformer. The secondary coil of the third transformer is connected to the contactor K21 of the second relay K2.

[0044] Furthermore, as shown in Figure 3, the wind power generation system also includes a fourth inverter and a fourth transformer, with the specific connection method as follows:

[0045] The input terminal of the fourth inverter is connected to the second energy storage module, the output terminal of the fourth inverter is connected to the primary coil of the fourth transformer, and the secondary coil of the fourth transformer is connected to the second detection circuit.

[0046] Furthermore, as shown in Figure 3, the wind power generation system also includes a third manual switch S3 and a fourth manual switch S4, with the specific connection method as follows:

[0047] One end of the third manual switch S3 is connected to the output terminal of the rectifier, and the other end of the third manual switch S3 is connected to the input terminal of the second energy storage module and the third inverter. The fourth manual switch S4 is located between the fourth inverter and the fourth transformer.

[0048] In some embodiments, the third manual switch S3 and the fourth manual switch S4 are circuit breakers.

[0049] According to some embodiments, as shown in Figure 4, the first detection circuit and the second detection circuit have the same circuit structure. The first detection circuit includes a rectifier bridge DB, an optocoupler U, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, and a second capacitor C2. Their specific connection methods are as follows:

[0050] The input terminal of the rectifier bridge DB is connected to the secondary coil of the second transformer. The positive output terminal of the rectifier bridge DB outputs the first power supply V1 to be tested through the first resistor R1. One end of the first capacitor C1, one end of the second capacitor C2, and one end of the second resistor R2 are connected to the first power supply V1. The negative output terminal of the rectifier bridge DB serves as the first ground point GND1 circuit. The other end of the first capacitor C1 and the other end of the second capacitor C2 are connected to the first ground point GND1. The other end of the second resistor R2 is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the third resistor R3 is connected to the first ground point GND1. The other end of the fourth resistor R4 is connected to the light-emitting side input terminal of the optocoupler U. The light-emitting side output terminal of the optocoupler U is connected to the first ground point GND1. The light-receiving side input terminal of the optocoupler U is connected to the second power supply V2 through the fifth resistor R5. The light-receiving side output terminal of the optocoupler U is connected to the control module.

[0051] Among them, the first resistor R1, the first capacitor C1 and the second capacitor C2 are used for RC filtering, the second resistor R2 and the third resistor R3 are used for voltage division, and the optocoupler U plays the role of isolation detection and protects the control module side.

[0052] According to some embodiments, as shown in Figure 4, the circuit structures of the first switching circuit and the second switching circuit are the same. The first switching circuit also includes a transistor Q, a diode D, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, and their specific connection methods are as follows.

[0053] The base of transistor Q is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7. The other end of the sixth resistor R6 is connected to the control module. The other end of the seventh resistor R7 and the emitter of transistor Q are connected to the second ground GND2. The collector of transistor Q is connected to one end of the coil of the first relay K1 and the positive terminal of diode D. The negative terminal of diode D is connected to the other end of the coil of the first relay K1 and one end of the eighth resistor R8. The other end of the eighth resistor R8 is connected to the second power supply V2.

[0054] The working principle of the above embodiment is as follows: when it is necessary to shut off the power supply to the first energy storage module, the control module does not output a signal to the base of transistor Q. Transistor Q receives a low-level signal through the seventh resistor R7, and transistor Q is cut off, causing the contactor K11 of the first relay K1 to open. When it is necessary to supply power to the first energy storage module, the control module outputs a high-level signal to the base of transistor Q, transistor Q is turned on, and the contactor K11 of the first relay K1 is engaged.

[0055] This application combines photovoltaic (PV) power generation and wind power generation, and includes a first energy storage module for PV power generation, a second energy storage module for wind power generation, and a park-wide energy storage module, enabling each component to store energy and improve the stability of the power supply. It also includes a control module, a first detection circuit, a second detection circuit, a first switching circuit, and a second switching circuit. The control module detects the first energy storage module for PV power generation through the first detection circuit, and detects the second energy storage module for wind power generation through the second detection circuit. Based on the power levels of the first and second energy storage modules, the control module switches the first and second switching circuits to switch power supply, improving the stability of the park's power supply and solving the problem of energy intermittency.

[0056] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An intelligent power supply system, characterized in that, The power supply system includes: a photovoltaic power generation system and a wind power generation system; a control module, a first detection circuit and a second detection circuit, wherein the detection input terminal of the first detection circuit is connected to the photovoltaic power generation system, the detection input terminal of the second detection circuit is connected to the wind power generation system, and the control module is connected to the detection output terminals of the first detection circuit and the second detection circuit respectively; a first switching circuit and a second switching circuit, wherein the first switching circuit includes a first relay, the second switching circuit includes a second relay, the control module is connected to the coil terminal of the first relay and the coil terminal of the second relay respectively, the contactor of the first relay is connected to the photovoltaic power generation system and the park energy storage module respectively, and the contactor of the second relay is connected to the wind power generation system and the park energy storage module respectively.

2. The power supply system according to claim 1, characterized in that, The photovoltaic power generation system further includes a photovoltaic power generation module, a first inverter, a first transformer, and a first energy storage module. The output terminal of the photovoltaic power generation module is connected to the input terminal of the first energy storage module and the first inverter. The output terminal of the first inverter is connected to the primary coil of the first transformer. The secondary coil of the first transformer is connected to the contactor of the first relay.

3. The power supply system according to claim 2, characterized in that, The photovoltaic power generation system also includes a second inverter and a second transformer. The input terminal of the second inverter is connected to the first energy storage module, the output terminal of the second inverter is connected to the primary coil of the second transformer, and the secondary coil of the second transformer is connected to the first detection circuit.

4. The power supply system according to claim 3, characterized in that, The photovoltaic power generation system also includes a first manual switch and a second manual switch. One end of the first manual switch is connected to the output end of the photovoltaic power generation module, and the other end of the first manual switch is connected to the input end of the first energy storage module and the first inverter. The second manual switch is located between the second inverter and the second transformer.

5. The power supply system according to claim 1, characterized in that, The wind power generation system includes a wind power generation module, a rectifier, a third inverter, a third transformer, and a second energy storage module. The output terminal of the wind power generation module is connected to the input terminal of the rectifier. The output terminal of the rectifier is connected to the input terminals of the second energy storage module and the third inverter. The output terminal of the third inverter is connected to the primary coil of the third transformer. The secondary coil of the third transformer is connected to the contactor of the second relay.

6. The power supply system according to claim 5, characterized in that, The wind power generation system also includes a fourth inverter and a fourth transformer. The input terminal of the fourth inverter is connected to the second energy storage module, the output terminal of the fourth inverter is connected to the primary coil of the fourth transformer, and the secondary coil of the fourth transformer is connected to the second detection circuit.

7. The power supply system according to claim 6, characterized in that, The wind power generation system also includes a third manual switch and a fourth manual switch. One end of the third manual switch is connected to the output terminal of the rectifier, and the other end of the third manual switch is connected to the input terminal of the second energy storage module and the third inverter. The fourth manual switch is located between the fourth inverter and the fourth transformer.

8. The power supply system according to claim 1, characterized in that, The first detection circuit and the second detection circuit have the same circuit structure. The first detection circuit includes a rectifier bridge, an optocoupler, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, and a second capacitor. The input terminal of the rectifier bridge is connected to the secondary coil of the second transformer. The positive output terminal of the rectifier bridge outputs the first power supply to be tested through the first resistor. One end of the first capacitor, one end of the second capacitor, and one end of the second resistor are connected to the first power supply. The negative output terminal of the rectifier bridge serves as a first ground circuit. The other ends of the first capacitor and the second capacitor are connected to the first ground. The other end of the second resistor is connected to one end of the third resistor and one end of the fourth resistor. The other end of the third resistor is connected to the first ground. The other end of the fourth resistor is connected to the light-emitting side input terminal of the optocoupler. The light-emitting side output terminal of the optocoupler is connected to the first ground. The light-receiving side input terminal of the optocoupler is connected to the second power supply through the fifth resistor. The light-receiving side output terminal of the optocoupler is connected to the control module.

9. The power supply system according to claim 1, characterized in that, The first switching circuit and the second switching circuit have the same circuit structure. The first switching circuit further includes a transistor, a diode, a sixth resistor, a seventh resistor, and an eighth resistor. The base of the transistor is connected to one end of the sixth resistor and one end of the seventh resistor. The other end of the sixth resistor is connected to the control module. The other end of the seventh resistor and the emitter of the transistor are connected to a second ground. The collector of the transistor is connected to one end of the coil of the first relay and the anode of the diode. The cathode of the diode is connected to the other end of the coil of the first relay and one end of the eighth resistor. The other end of the eighth resistor is connected to a second power supply.

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