Photovoltaic power generation energy storage system

Abstract

The utility model relates to a photovoltaic power generation energy storage system which comprises a first photovoltaic mechanism, a second photovoltaic mechanism and a power distribution mechanism. The first photovoltaic mechanism is connected with a first DC / DC converter, and the first DC / DC converter is used for being connected with a load; the output end of the second photovoltaic mechanism is connected with an inverter, and the inverter is used for being connected to a load; the input end of the power distribution mechanism is connected with a power grid and an alternating-current generator, and the output end is connected with a charging pile of which the output end is connected to a load. According to the application, at least four power supplies are arranged, including the first photovoltaic mechanism and the second photovoltaic mechanism for outputting direct current, the power grid for outputting alternating current and the alternating-current generator, and a series-parallel combined power supply line is formed, so that a factory power supply is fully utilized, and when a single power supply fails, the power supply can be supplied to the power grid. Other power supplies replace the fault power supply to supply power to the load.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photovoltaic charging piles, in particular to a photovoltaic power generation energy storage system. BACKGROUND

[0002] Nowadays, the market share of electric vehicles is increasing, and the electric vehicle charging piles matched with the electric vehicles have become essential equipment in cities, wherein the photovoltaic energy supply charging piles are the market mainstream, the photovoltaic charging pile converts solar energy into electric energy to charge the vehicles, and the remaining electric energy is stored in the energy storage battery.

[0003] In an industrial park, there are various power supply devices such as power grids and generators, and how to reasonably coordinate the various power supply devices and the charging piles to fully utilize the electric energy to charge the vehicles has become a problem to be solved by the person skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The application provides a photovoltaic power generation energy storage system capable of fully utilizing various power sources of a factory.

[0005] The photovoltaic power generation energy storage system provided by the application adopts the following technical scheme:

[0006] The photovoltaic power generation energy storage system comprises a first photovoltaic mechanism, a second photovoltaic mechanism and a power distribution mechanism, the first photovoltaic mechanism is connected with a first DC / DC converter, the first DC / DC converter is used for connecting a load, the output end of the second photovoltaic mechanism is connected with an inverter, the inverter is used for being connected to the load, the input end of the power distribution mechanism is connected with a power grid and an alternating current generator, the output end of the power distribution mechanism is connected with a charging pile, and the output end of the charging pile is used for being connected to the load.

[0007] Preferably, the power distribution mechanism comprises a main control cabinet and a first AC / DC converter, the input end of the first AC / DC converter is connected to the power grid and the alternating current generator, the output end of the first AC / DC converter is connected with an energy storage battery, the energy storage battery is connected with a second DC / DC converter, the second DC / DC converter is used for being connected to the load, and the main control cabinet is connected with the charging pile.

[0008] Preferably, the power distribution mechanism further comprises a dynamic voltage treatment device, the input end of the dynamic voltage treatment device is connected with the main control cabinet, and the output end of the dynamic voltage treatment device is connected with the charging pile.

[0009] Preferably, the inverter is connected to the power grid.

[0010] Preferably, the inverter is further connected with a collector, the collector is communicatively connected with a monitoring platform, and the monitoring platform is used for controlling the inverter.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] 1. This application sets up at least four power supply sources, including a first photovoltaic mechanism and a second photovoltaic mechanism that output DC power, a power grid and an AC generator that output AC power, and forms a series-parallel power supply line, which makes full use of the factory power supply and allows other power sources to replace the faulty power source to supply power to the load when a single power source fails.

[0013] 2. By setting up a dynamic voltage management device to continuously monitor the input power supply voltage, when the power supply voltage deviates from the rated voltage level, the device provides a normal power supply voltage to the load, ensuring stable output voltage and protecting the load from voltage fluctuations.

[0014] 3. By setting up an inverter connected to the power grid, the excess power in the second photovoltaic unit can be connected to the grid, making full use of photovoltaic energy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the present application.

[0016] Figure 2 This is a power generation flowchart of the first photovoltaic mechanism in a preferred embodiment of this application.

[0017] Figure 3 This is a power generation flowchart of the second photovoltaic mechanism in a preferred embodiment of this application.

[0018] Figure 4 This is a power generation flowchart of the power grid and AC generator in a preferred embodiment of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. First photovoltaic unit; 2. Second photovoltaic unit; 3. First DC / DC converter; 4. Inverter; 5. Power distribution unit; 51. First AC / DC converter; 52. Main control cabinet; 521. Central controller; 522. Second AC / DC converter; 53. Dynamic voltage management equipment; 6. Power grid; 7. Alternating current generator; 8. Charging pile; 81. Human-machine interface panel; 9. Energy storage battery; 10. Second DC / DC converter; 11. Data acquisition unit; 12. Monitoring platform. Detailed Implementation

[0020] The present application will be further described in detail below with reference to the accompanying drawings.

[0021] This application provides a photovoltaic power generation and energy storage system, such as Figures 1 to 4As shown, it includes a first photovoltaic unit 1, a second photovoltaic unit 2, and a power distribution unit 5. The first photovoltaic unit 1 is connected to a first DC / DC converter 3, which is used to connect to a load. The output end of the second photovoltaic unit 2 is connected to an inverter 4, which is used to connect to the load. The input end of the power distribution unit 5 is connected to a power grid 6 and an AC generator 7, and the output end is connected to a charging pile 8, which is used to connect to the load. The load is an electric vehicle. The first photovoltaic unit 1 is a rooftop photovoltaic system, and the second photovoltaic unit 2 is a building-integrated photovoltaic system. Specifically, the charging pile 8 is installed inside the parking shed, the rooftop photovoltaic system is installed on the top of the parking shed, and the building-integrated photovoltaic system is installed on a high-rise building away from the parking shed.

[0022] The photovoltaic power generation and energy storage system disclosed in this application utilizes at least four power sources. The load is charged by at least one of the following: a first photovoltaic unit 1, a second photovoltaic unit 2, a power grid 6, and an AC generator 7. The first photovoltaic unit 1 and the second photovoltaic unit 2 provide direct current (DC). The DC power from the two lines is transformed by a first DC / DC converter 3 and an inverter 4, respectively, and then used to charge the load. The power grid 6 and the AC generator 7 provide alternating current (AC). The AC power from the two lines is combined by a power distribution unit 5, which converts the AC power into DC power and then transforms it before it flows to a charging pile 8. The charging pile 8 then charges the load, making full use of the factory's multiple power sources.

[0023] The power distribution unit 5 includes a main control cabinet 52 and a first AC / DC converter 51. The input end of the first AC / DC converter 51 is connected to the power grid 6 and the alternator 7, and the output end is connected to an energy storage battery 9. The energy storage battery 9 is connected to a second DC / DC converter 10, which is used to connect to the load. The main control cabinet 52 is connected to the charging pile 8.

[0024] Specifically, the main control cabinet 52 includes a central controller 521 and a second AC / DC converter 522. The central controller 521 is connected to the second AC / DC converter 522. The input terminal of the second AC / DC converter 522 is connected to the power grid 6 and the alternator 7, and the output terminal is connected to the charging pile 8. The charging pile 8 is equipped with a human-machine interface panel 81, which is wirelessly connected to the central controller 521. Users can scan codes, select charging time and output voltage through the human-machine interface panel 81, and the central controller 521 adjusts the corresponding parameters according to the information required by the user.

[0025] The power distribution unit 5 also includes a dynamic voltage management device 53. The input end of the dynamic voltage management device 53 is connected to the main control cabinet 52, and the output end is connected to the charging pile 8. The dynamic voltage management device 53 is used to continuously monitor the input power supply voltage and provide normal power supply voltage to the load when the power supply voltage deviates from the rated voltage level, so as to ensure the stability of the output voltage and ensure that the protected load is not affected by voltage changes. The specific model of the dynamic voltage management device 53 is PTW PSTN-DC BANK.

[0026] The power distribution unit 5 also includes a first AC / DC converter 51, the input of which is connected to the power grid 6 and the alternator 7, and the output is connected to an energy storage battery 9. The energy storage battery 9 is connected to a second DC / DC converter, which is used to connect to the load.

[0027] The AC power from the power grid 6 and the AC generator 7 is converted into DC power by the first AC / DC converter 51 and then stored in the energy storage battery 9 after voltage transformation. The energy storage battery 9 serves as a backup power source and can also function as a load as needed.

[0028] like Figure 3 The inverter 4 is connected to the power grid 6. When the second photovoltaic unit 2 has excess power, the power is converted into AC power by the inverter 4 and then connected to the grid, making full use of photovoltaic energy.

[0029] Inverter 4 is also connected to data collector 11, which is communicatively connected to monitoring platform 12. Monitoring platform 12 is used to control inverter 4. Monitoring platform 12 can obtain information about inverter 4, load information, second photovoltaic unit 2 information and power grid 6 through data collector 11, and control inverter 4.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic power generation and energy storage system, characterized in that: It includes a first photovoltaic unit (1), a second photovoltaic unit (2), and a power distribution unit (5); The first photovoltaic mechanism (1) is connected to a first DC / DC converter (3), which is used to connect to a load; The output end of the second photovoltaic mechanism (2) is connected to an inverter (4), which is used to connect to the load; The input end of the power distribution mechanism (5) is connected to the power grid (6) and the AC generator (7), and the output end is connected to the charging pile (8). The output end of the charging pile (8) is used to connect to the load.

2. The photovoltaic power generation and energy storage system according to claim 1, characterized in that: The power distribution mechanism (5) includes a main control cabinet (52) and a first AC / DC converter (51). The input end of the first AC / DC converter (51) is connected to the power grid (6) and the alternator (7), and the output end is connected to an energy storage battery (9). The energy storage battery (9) is connected to a second DC / DC converter (10). The second DC / DC converter (10) is used to connect to the load. The main control cabinet (52) is connected to the charging pile (8).

3. The photovoltaic power generation and energy storage system according to claim 2, characterized in that: The power distribution mechanism (5) also includes a dynamic voltage management device (53), the input end of which is connected to the main control cabinet (52), and the output end is connected to the charging pile (8).

4. The photovoltaic power generation and energy storage system according to claim 1, characterized in that: The inverter (4) is connected to the power grid (6).

5. A photovoltaic power generation and energy storage system according to claim 4, characterized in that: The inverter (4) is also connected to a data acquisition unit (11), which is communicatively connected to a monitoring platform (12). The monitoring platform (12) is used to control the inverter (4).

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