Charging pile wiring structure based on multiple application scenes

Abstract

The utility model discloses a charging pile wiring structure based on multiple application scenes. The structure comprises a distributed photovoltaic system or an energy storage system. And a medium voltage bus segment; and a plurality of charging piles. The distributed photovoltaic system comprises a first transformer, a photovoltaic inverter and a photovoltaic module, and the high-voltage side of the first transformer is connected with the medium-voltage bus section; the low-voltage side of the first transformer is connected with the photovoltaic module through the photovoltaic inverter; the plurality of charging piles are connected between the first transformer and the photovoltaic inverter through a circuit; the energy storage system comprises a second transformer, a PCS and a storage battery, and the high-voltage side of the second transformer is connected with the medium-voltage bus section; the low-voltage side of the second transformer is connected with the storage battery through the PCS; and the plurality of charging piles are connected between the second transformer and the PCS through circuits. The charging pile wiring structure based on multiple application scenes optimizes the power supply wiring mode of the vehicle charging pile, is more reasonable in resource and energy application, and saves the construction cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of charging pile wiring, and particularly relates to a charging pile wiring structure based on multiple application scenarios. BACKGROUND

[0002] In order to improve the grid-connected power quality of new energy, the photovoltaic power station is configured with an electrochemical energy storage in proportion to the power generation installed capacity. In order to rationally utilize resources, more and more enterprises utilize the roof of the existing building to set up distributed photovoltaic.

[0003] The above power generation enterprise usually has a personnel office area in the station. With the popularization of new energy vehicles, the supporting setting of automobile charging piles is also more and more widespread. In the station, a transformer is usually connected from the medium-voltage bus section to reduce the voltage to 380 / 220V to provide power for the charging pile to charge the new energy vehicle. However, this wiring mode increases the medium-voltage switch cabinet, transformer and other equipment, and increases the cost and equipment operation cost. Therefore, it is necessary to design a wiring structure to utilize the existing distributed photovoltaic system and electrochemical energy storage system in the station to complete the function of charging the vehicle in the region, and to achieve efficient utilization of resources and energy. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiency of the above background technology, and provides a charging pile wiring structure based on multiple application scenarios. The structure optimizes the power supply wiring mode of the vehicle charging pile, the resource and energy application are more reasonable, and the engineering cost is saved.

[0005] To achieve the above purpose, the utility model designs a charging pile wiring structure based on multiple application scenarios, which comprises a distributed photovoltaic system or an energy storage system.

[0006] and a medium-voltage bus section.

[0007] and a plurality of charging piles.

[0008] The distributed photovoltaic system comprises a first transformer, a photovoltaic inverter and a photovoltaic assembly. The high-voltage side of the first transformer is connected with the medium-voltage bus section. The low-voltage side of the first transformer is connected with the photovoltaic assembly through the photovoltaic inverter. The plurality of charging piles are connected between the first transformer and the photovoltaic inverter through a circuit.

[0009] The energy storage system comprises a second transformer, a PCS and a storage battery. The high-voltage side of the second transformer is connected with the medium-voltage bus section. The low-voltage side of the second transformer is connected with the storage battery through the PCS. The plurality of charging piles are connected between the second transformer and the PCS through a circuit.

[0010] As a preferred implementation, the medium voltage bus section is connected to the new energy vehicle through the charging pile after the first transformer.

[0011] As a preferred implementation, the medium voltage bus section is connected to the new energy vehicle through the charging pile after the second transformer.

[0012] As a preferred implementation, the voltage level of the medium voltage bus section is 6kV, 10kV or 35kV.

[0013] As a preferred implementation, the voltage of the power supply side of the charging pile is 380V.

[0014] As a preferred implementation, the charging pile is a direct current charging pile for vehicles and / or an alternating current charging pile for vehicles.

[0015] As a preferred implementation, the distributed photovoltaic system is configured in a thermal power plant, a gas turbine power station or a compressed air energy storage power station.

[0016] As a preferred implementation, the energy storage system is configured in a photovoltaic power station.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] Firstly, the charging pile wiring structure of the utility model uses the existing equipment of the plant station to complete the function of charging the vehicles in the region, optimizes the power supply wiring mode of the charging pile for vehicles, and makes the application of resources and energy more reasonable, thereby achieving efficient use of resources and energy.

[0019] Secondly, the charging pile wiring structure of the utility model does not need to use a special transformer to reduce the voltage, thereby saving the cost of medium voltage switch cabinet and transformer equipment.

[0020] Thirdly, for the thermal power plant, gas turbine power station and compressed air energy storage power station configured with distributed photovoltaic, the charging pile wiring structure of the utility model can directly charge the new energy vehicle through the photovoltaic module and photovoltaic inverter during the day, thereby reducing the intermediate link of photovoltaic power use; and the new energy vehicle can be charged through the medium voltage bus and transformer at night.

[0021] Fourthly, for the photovoltaic power station configured with electrochemical energy storage, the charging pile wiring structure of the utility model can directly charge the new energy vehicle through the battery on a daily basis, thereby increasing the utilization rate of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the charging pile wiring structure based on multiple application scenarios of the first embodiment.

[0023] Figure 2 This is a schematic diagram of the wiring structure of a charging pile based on multiple application scenarios in the second implementation method;

[0024] In the diagram, 1-medium voltage busbar section, 2-distributed photovoltaic system, 201-first transformer, 202-photovoltaic inverter, 203-photovoltaic module, 3-energy storage system, 301-second transformer, 302-PCS, 303-battery, 4-charging pile, 401-vehicle DC charging pile, 402-vehicle AC charging pile. Detailed Implementation

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to specific embodiments. However, those skilled in the art will understand that the following embodiments are only some, not all, of the present invention, and are used only to illustrate the present invention, and should not be considered as limiting the scope of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] When a component is described as being "set on" another component, it can be directly on the other component or it can be in an intervening component. "Set on" indicates a mode of existence, which can be a connection, installation, fixed connection, active connection, etc. When a component is described as being "connected" to another component, it can be directly connected to the other component or it may be in an intervening component.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] like Figure 1As shown, for a distributed photovoltaic power plant, gas turbine power plant, and compressed air energy storage power plant, the first embodiment of this utility model, based on a multi-application scenario charging pile wiring structure, includes a medium-voltage bus section 1, a distributed photovoltaic system 2, and several charging piles 4. The distributed photovoltaic system 2 includes a first transformer 201, a photovoltaic inverter 202, and photovoltaic modules 203. The high-voltage side of the first transformer 201 is connected to the medium-voltage bus section 1; the low-voltage side of the first transformer 201 is connected to the photovoltaic modules 203 through the photovoltaic inverter 202; several charging piles 4 are connected between the first transformer 201 and the photovoltaic inverter 202 via a circuit. The medium-voltage bus section 1 is connected to the new energy vehicle for charging via the charging piles 4 after passing through the first transformer 201; the photovoltaic modules 203 are connected to the new energy vehicle for charging via the charging piles 4 after passing through the photovoltaic inverter 202. The charging piles 4 are vehicle-mounted DC charging piles 401 and / or vehicle-mounted AC charging piles 402. The voltage level of the medium-voltage bus section 1 is 6kV, 10kV, or 35kV. The low-voltage side voltage of the first transformer 201 can be set to 380V through the selection of photovoltaic inverters, and the power supply side voltage of the charging pile is 380V.

[0029] For vehicles equipped with thermal power plants, gas turbine power plants, and compressed air energy storage power plants, there are two charging modes via AC charging piles and DC charging piles:

[0030] Mode 1: The medium-voltage busbar section, after passing through the first transformer, charges the vehicle via a charging pile.

[0031] Mode 2: The photovoltaic modules are connected to a photovoltaic inverter and then used to charge the car via a charging station.

[0032] For thermal power plants, gas turbine power plants, or compressed air energy storage power plants equipped with distributed photovoltaic systems, photovoltaic modules can be used directly to charge new energy vehicles during the day, reducing intermediate links in the use of photovoltaic power; at night, new energy vehicles can be charged through the medium-voltage busbar and the first transformer.

[0033] like Figure 2As shown, for a photovoltaic power station equipped with electrochemical energy storage, the second embodiment of this utility model, a charging pile wiring structure based on multiple application scenarios, includes a medium-voltage bus section 1, an energy storage system 3, and several charging piles 4. The energy storage system 3 includes a second transformer 301, a PCS 302 (PCS stands for power conversion system, energy storage converter), and a battery 303. The high-voltage side of the second transformer 301 is connected to the medium-voltage bus section 1; the low-voltage side of the second transformer 301 is connected to the battery 303 through the PCS 302; several charging piles 4 are connected between the second transformer 301 and the PCS 302 via a circuit. The medium-voltage bus section 1 is connected to the new energy vehicle for charging via the charging piles 4 after passing through the second transformer 301; the battery 303 is connected to the new energy vehicle for charging via the charging piles 4 after passing through the PCS 302. The charging piles 4 are vehicle-mounted DC charging piles 401 and / or vehicle-mounted AC charging piles 402. The voltage level of the medium-voltage bus section 1 is 6kV, 10kV, or 35kV. The low-voltage side voltage of the second transformer 301 is constrained by the PCS product. It can be converted to 380V by the transformer and then connected to the charging pile. The power supply side voltage of the charging pile is 380V.

[0034] For photovoltaic power stations equipped with electrochemical energy storage, there are two modes for charging cars via DC charging stations:

[0035] Mode 1: The medium-voltage busbar section, after passing through the second transformer, charges the vehicle via a charging pile.

[0036] Mode 2: The battery is charged to the car via the charging station after passing through the PCS.

[0037] For photovoltaic power stations equipped with electrochemical energy storage, new energy vehicles can be charged directly through batteries in daily operations, increasing the utilization rate of batteries.

[0038] The above are merely specific embodiments of this utility model. It should be noted that any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. All other aspects not described in detail belong to the prior art.

Claims

1. A wiring structure for charging piles based on multiple application scenarios, characterized in that: This includes distributed photovoltaic systems (2) or energy storage systems (3); and, medium-voltage busbar section (1); In addition, several charging piles (4); The distributed photovoltaic system (2) includes a first transformer (201), a photovoltaic inverter (202), and a photovoltaic module (203); the high-voltage side of the first transformer (201) is connected to the medium-voltage bus section (1); the low-voltage side of the first transformer (201) is connected to the photovoltaic module (203) through the photovoltaic inverter (202); and several charging piles (4) are connected between the first transformer (201) and the photovoltaic inverter (202) through a circuit. The energy storage system (3) includes a second transformer (301), a PCS (302), and a battery (303). The high-voltage side of the second transformer (301) is connected to the medium-voltage bus section (1). The low-voltage side of the second transformer (301) is connected to the battery (303) through the PCS (302). Several charging piles (4) are connected between the second transformer (301) and the PCS (302) through a circuit.

2. The charging pile wiring structure based on multiple application scenarios according to claim 1, characterized in that: The medium-voltage busbar section (1) is connected to the new energy vehicle for charging via the first transformer (201) and the charging pile (4); the photovoltaic module (203) is connected to the new energy vehicle for charging via the photovoltaic inverter (202) and the charging pile (4).

3. The charging pile wiring structure based on multiple application scenarios according to claim 1, characterized in that: The medium-voltage busbar section (1) is connected to the new energy vehicle for charging via the charging pile (4) after passing through the second transformer (301); the battery (303) is connected to the new energy vehicle for charging via the charging pile (4) after passing through the PCS (302).

4. The charging pile wiring structure based on multiple application scenarios according to claim 1, 2, or 3, characterized in that: The voltage level of the medium-voltage bus section (1) is 6kV, 10kV or 35kV.

5. The charging pile wiring structure based on multiple application scenarios according to claim 1, 2, or 3, characterized in that: The power supply voltage of the charging pile is 380V.

6. The charging pile wiring structure based on multiple application scenarios according to claim 1, 2, or 3, characterized in that: The charging pile (4) is a vehicle DC charging pile (401) and / or a vehicle AC charging pile (402).

7. The charging pile wiring structure based on multiple application scenarios according to claim 1, 2, or 3, characterized in that: The distributed photovoltaic system (2) is configured in a thermal power plant, a gas turbine power plant or a compressed air energy storage power plant.

8. The charging pile wiring structure based on multiple application scenarios according to claim 1, 2, or 3, characterized in that: The energy storage system (3) is configured in the photovoltaic power station.

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