A power generation, storage and charging integrated device

Abstract

The utility model discloses a power generation storage and charging integrated device, including the cabinet body, and be located in the energy storage unit, power generation unit, direct current charging unit, PCS inverter and direct current bus of cabinet body, energy storage unit power generation unit direct current charging unit parallelly arranged on direct current bus, power generation unit is used for producing direct current, energy storage unit is used for storing direct current, and direct current bus is connected with external power grid through PCS inverter. The utility model can help the relationship between the balance of distribution network load and charging demand.

Description

Technical Field

[0001] This utility model relates to the field of power system technology, and in particular to an integrated power generation, storage and charging device. Background Technology

[0002] With the large-scale development and utilization of renewable energy, renewable energy will become the main primary energy source in the power grid in the future, which will bring about significant changes to the structure and operation mode of the power grid.

[0003] With the increasing charging demand of electric vehicles and other devices, the mismatch between power resources and load demand has become apparent, posing new challenges to the power distribution network.

[0004] Therefore, it is necessary to develop an integrated power generation, storage, and charging device to balance the relationship between distribution network load and charging demand, and to meet the needs of actual users and the future market. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated power generation, storage and charging device to help balance the relationship between power distribution network load and charging demand.

[0006] To address the aforementioned technical problems, this utility model provides an integrated power generation, storage, and charging device, comprising a cabinet, and an energy storage unit, a power generation unit, a DC charging unit, a PCS inverter, and a DC bus disposed within the cabinet. The energy storage unit, the power generation unit, and the DC charging unit are connected in parallel on the DC bus. The power generation unit is used to generate DC power, the energy storage unit is used to store DC power, and the DC bus is connected to the external power grid through the PCS inverter.

[0007] As an improvement to the above solution, the power generation unit includes at least one of a photovoltaic power generation unit and a wind turbine power generation unit;

[0008] The photovoltaic power generation unit includes a photovoltaic converter, a first DC switch, and photovoltaic modules connected in series outside the cabinet.

[0009] The wind turbine power generation unit includes a wind turbine converter, a wind turbine controller, and a wind turbine generator connected in series outside the cabinet.

[0010] As an improvement to the above solution, the DC charging unit includes a DC charging module and a second DC switch, wherein the DC charging module, the second DC switch, and a DC charging gun located outside the cabinet are connected in series.

[0011] As an improvement to the above solution, the energy storage unit includes an energy storage converter and a battery module, wherein the energy storage converter is connected in series with the battery module.

[0012] As an improvement to the above scheme, it also includes a surge protector and a third DC switch connected to the DC bus, wherein the surge protector and the third DC switch are connected in series.

[0013] As an improvement to the above scheme, it also includes a metering device and a first AC switch, wherein the PCS inverter is connected in series with the metering device and the first AC switch, and the first AC switch is connected to the external power grid.

[0014] As an improvement to the above solution, the energy storage unit, power generation unit, DC charging unit, PCS inverter, and metering device are all connected to the cloud platform via a network communication module.

[0015] As an improvement to the above solution, a surveillance camera is also included, which is connected to the metering device or the first AC switch via a second AC switch.

[0016] As an improvement to the above solution, a detection alarm is installed inside the cabinet, and the detection alarm is connected to the metering device through a third AC switch.

[0017] As an improvement to the above solution, the cabinet is also equipped with a heat dissipation device and a smoke alarm device, which is connected to the cloud platform through a network communication module.

[0018] Implementing this utility model has the following beneficial effects:

[0019] This invention connects energy storage units, power generation units, and DC charging units via a DC bus to form a DC-coupled system. The PCS inverter converts AC power from the external grid into DC power for use by the DC charging unit load. Simultaneously, any unused DC power generated by the power generation unit or stored by the energy storage unit is converted into AC power and fed into the grid. The DC power generated by the power generation unit is distributed to the DC charging unit load via the DC bus, or distributed to the energy storage unit for storage, or unused DC power is converted into AC power and fed into the grid via the PCS inverter. This ensures charging reliability and enables self-generation and self-consumption of electricity, storing available electricity and feeding surplus electricity into the grid. This forms a new microgrid system with self-generated and self-consumed DC power as the main source and grid power as a supplement, which can balance the relationship between distribution network load and charging demand.

[0020] This utility model integrates independently distributed wind turbine power generation, photovoltaic power generation, energy storage, DC charging and other units into DC coupling, which has a high degree of integration, high efficiency, small size and small footprint, low installation and maintenance costs, multiple functions and convenient use, and can meet the actual needs of users and the market. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the electrical structure of the integrated power generation, storage and charging device of this utility model;

[0022] Figure 2 This is a front view of the cabinet structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the back of the cabinet structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the data communication of the integrated power generation, storage and charging device of this utility model; Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0026] like Figures 1 to 4 As shown in the figure, a specific embodiment of the present invention provides an integrated power generation, energy storage and charging device, including a cabinet 1, and a power generation unit, an energy storage unit, a DC charging unit, a PCS inverter 24 and a DC bus 25 disposed in the cabinet 1. The energy storage unit, the power generation unit and the DC charging unit are arranged in parallel on the DC bus 25. The power generation unit and the energy storage unit are used to generate and store DC power, respectively. The DC bus 25 is connected to the external power grid 3 through the PCS inverter 24.

[0027] In this embodiment, the energy storage unit, power generation unit, and DC charging unit are connected by a DC bus 25 to form a DC-coupled system. The PCS inverter 24 converts the AC power from the external power grid 3 into DC power for use by the DC charging unit load. At the same time, any unused DC power generated by the power generation unit or stored by the energy storage unit is converted into AC power and fed into the grid. The DC power generated by the power generation unit is distributed to the DC charging unit load through the DC bus 25, or distributed to the energy storage unit for storage, or the unused DC power is converted into AC power and fed into the grid through the PCS inverter 24. On the one hand, this ensures the reliability of charging, and on the other hand, it realizes the self-generation and self-consumption of electricity, storing electricity when available and feeding surplus electricity into the grid. This forms a new type of microgrid system with DC power self-generation and self-consumption as the main source and grid power as a supplement, which can balance the relationship between the distribution network load and the charging demand.

[0028] The PCS inverter 24, also known as a bidirectional energy storage inverter, is a device that enables bidirectional energy conversion. It can convert the DC power from the battery into AC power for supply to the grid or AC loads; it can also rectify the AC power from the grid into DC power to charge the battery. In this embodiment, the DC bus 25 is a 750V DC bus, which connects the energy storage unit, power generation unit, and DC charging unit to form a 750V DC coupled system. Other specifications of DC bus 25 can be selected according to actual needs.

[0029] The power generation unit in this embodiment includes at least one of a photovoltaic power generation unit and a wind turbine power generation unit. Specifically, the photovoltaic power generation unit includes a photovoltaic converter 211, a first DC switch 212, and a photovoltaic module 41 connected in series outside the cabinet 1 to generate direct current (DC) through solar energy. The wind turbine power generation unit specifically includes a wind turbine converter 213, a wind turbine controller 214, and a wind turbine generator 42 connected in series outside the cabinet 1 to generate DC through wind energy. The photovoltaic converter 211 is connected to the external photovoltaic module 41 via the first DC switch 212. The photovoltaic converter 211 sends the DC power generated by the external photovoltaic module 41 to the DC 750V DC bus 25 for distribution, either for charging the DC charging unit, storing DC power in the energy storage unit, or converting it into AC power via the PCS inverter 24 and transmitting it to the external power grid 3. The wind turbine converter 213 is connected to the external wind turbine generator 42 through the wind turbine controller 214. The wind turbine converter 213 sends the DC power generated by the external wind turbine generator 42 through wind power generation to the DC750V DC bus 25 for distribution to be used for charging the DC charging unit, or for storing DC power in the energy storage unit, or converts it into AC power through the PCS inverter 24 and transmits it to the external power grid 3.

[0030] The energy storage unit in this embodiment includes an energy storage converter 221 and a battery module 222, which are connected in series. The energy storage converter 221 charges the battery module 222, and the battery module 222 discharges through the energy storage converter 221, storing and releasing the electrical energy generated by the photovoltaic module 41 and the wind turbine 42, thus achieving self-generation and self-consumption, storing electricity when available, and feeding surplus electricity into the grid.

[0031] The DC charging unit in this embodiment includes a DC charging module 231 and a second DC switch 232. The DC charging module 231, the second DC switch 232, and a DC charging gun 43 located outside the cabinet 1 are connected in series to charge the electric vehicle with electricity from the photovoltaic module 41, the wind turbine 42, the battery module 222, or the external power grid 3.

[0032] This embodiment integrates independently distributed wind turbine power generation, photovoltaic power generation, energy storage, DC charging and other units through DC coupling. It has a high degree of integration, high efficiency, small size and small footprint, low installation and maintenance costs, multiple functions, and is easy to use, which can meet the actual needs of users and the market.

[0033] The integrated power generation, storage, and charging device in this embodiment also includes a metering device 26 and a first AC switch 27. The PCS inverter 24 is connected in series with the metering device 26 and the first AC switch 27, and the first AC switch 27 is connected to the external mains power grid. The first AC switch 27 provides power distribution and protection for the entire system, and the metering device 26 records the total power consumption of the entire system at all times.

[0034] To further enhance the safety of this device, a protection circuit connected to the DC bus 25 is also provided inside cabinet 1. This protection circuit includes a surge protector 281 and a third DC switch 282, which are connected in series to the integrated wind-solar-storage-charging DC system. When the system voltage exceeds the protection setting of the surge protector 281, the surge protector 281 discharges the voltage and current to the ground through the ground wire, ensuring the safe operation of the device's electronic equipment.

[0035] The energy storage unit, power generation unit, DC charging unit, PCS inverter 24, and metering device 26 are connected to the cloud platform via network communication modules. Specifically, the photovoltaic converter 211, energy storage converter 221, wind turbine converter 213, wind turbine controller 214, battery module 222, PCS inverter 24, metering device 26, and DC charging module 231 are connected to the cloud platform via network communication modules.

[0036] This embodiment also includes a monitoring camera 44 installed on the cabinet 1. The monitoring camera 44 is connected to the metering device 26 or the first AC switch 27 via the second AC switch 29. The monitoring cameras 44 are diagonally distributed on the top of the cabinet 1 to effectively monitor the real-time situation around the cabinet and achieve monitoring operations. Further, as... Figure 4 As shown, a wireless data gateway 5 is installed inside the cabinet 1. The wireless data gateway 5 is connected to the cloud platform, namely the integrated wind, solar, energy storage and charging platform 6, via wireless public network communication.

[0037] Metering device 26, PCS inverter 24, energy storage converter 221, and photovoltaic converter 211 are connected to wireless data gateway 5 via one of their parallel RS485 communication interfaces. Wind turbine converter 213, wind turbine controller 214, and DC charging module 231 are connected to wireless data gateway 5 via another parallel RS485 communication interface. Monitoring camera 44 is connected to wireless data gateway 5. Ultimately, the operating information and power information of each device are sent to the integrated wind-solar-storage-charging platform 6 via the network. Users or maintenance personnel can access the integrated wind-solar-storage-charging platform 6 via mobile terminals or computers to view charging data, energy storage data, photovoltaic data, wind power data, video monitoring data, power monitoring data, etc., and can even print operating data sheets using printing equipment, offering diverse functions. In case of any abnormality, the cloud platform can promptly send alarm information to the mobile terminal of maintenance personnel to improve maintenance efficiency.

[0038] To further enhance the safety of this device, a detection alarm 201 is installed inside cabinet 1. The detection alarm 201 is connected to the metering device 26 via a third AC switch. The detection alarm 201 provides early warning and issues a trip command to disconnect the AC switch, preventing fire. Simultaneously, the detection alarm 201 transmits fire anomaly data to the integrated wind-solar-storage-charging platform 6 via the wireless data gateway 5, alerting maintenance personnel to immediately address the fire anomaly, thereby maximizing the safety of the device and reducing maintenance costs.

[0039] To further improve the safety of this device, this embodiment also includes a heat dissipation device inside the cabinet 1. The heat dissipation device includes a cooling fan and an industrial air conditioner 202 to dissipate heat from inside the cabinet and prevent large temperature rises inside the cabinet from causing safety accidents.

[0040] To further enhance the safety of this device, cabinet 1 is also equipped with a smoke alarm system. The smoke alarm system is connected to metering device 26 or first AC switch 27 via a fourth AC switch, and to a cloud platform via a network communication module. The smoke alarm system includes a smoke detector and a perfluorohexanone fire extinguisher 203. In the event of a fire inside cabinet 1, the perfluorohexanone fire extinguisher 203 will activate and spray to extinguish the fire.

[0041] In summary, this utility model integrates independently distributed wind turbine generators 42, charging piles, photovoltaic power generation, energy storage, video surveillance, power monitoring and other technical equipment, resulting in a high degree of integration, small overall size, and low installation and maintenance costs, which can meet the actual needs of users and the market.

[0042] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A power generation storage integration device characterized by comprising: The device includes a cabinet, and an energy storage unit, a power generation unit, a DC charging unit, a PCS inverter, and a DC bus housed within the cabinet. The energy storage unit, the power generation unit, and the DC charging unit are connected in parallel on the DC bus. The power generation unit is used to generate DC power, the energy storage unit is used to store DC power, and the DC bus is connected to the external power grid through the PCS inverter.

2. The power generation, storage and supply integrated device according to claim 1, wherein The energy storage unit includes an energy storage converter and a battery module, with the energy storage converter connected in series with the battery module.

3. The power generation, storage and supply integrated device according to claim 1, wherein The power generation unit includes at least one of a photovoltaic power generation unit and a wind turbine power generation unit; The photovoltaic power generation unit includes a photovoltaic converter, a first DC switch, and photovoltaic modules connected in series outside the cabinet. The wind turbine power generation unit includes a wind turbine converter, a wind turbine controller, and a wind turbine generator connected in series outside the cabinet.

4. The power generation, storage and supply integrated device according to claim 1, wherein The DC charging unit includes a DC charging module and a second DC switch, and the DC charging module, the second DC switch, and a DC charging gun located outside the cabinet are connected in series.

5. The power generation, storage and supply integrated device according to claim 1, wherein It also includes a surge protector and a third DC switch connected to the DC bus, wherein the surge protector and the third DC switch are connected in series.

6. The power generation, storage and supply integrated device according to claim 1, wherein It also includes a metering device and a first AC switch, wherein the PCS inverter is connected in series with the metering device and the first AC switch, and the first AC switch is connected to the external power grid.

7. The power generation, storage and supply integrated device according to claim 6, wherein The energy storage unit, power generation unit, DC charging unit, PCS inverter, and metering device are all connected to the cloud platform via a network communication module.

8. The power generation, storage and supply integrated device according to claim 6, wherein It also includes a surveillance camera, which is connected to the metering device or the first AC switch via a second AC switch.

9. The power generation, storage and supply integrated device according to claim 6, wherein The cabinet is equipped with a detection alarm, which is connected to the metering device via a third AC switch.

10. The power generation, storage and supply integrated device according to claim 7, wherein The cabinet is also equipped with a heat dissipation device and a smoke alarm device, which is connected to the cloud platform via a network communication module.

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