CN-224233343-U - Flexible interconnection system for low-voltage transformer area

CN224233343UCN 224233343 UCN224233343 UCN 224233343UCN-224233343-U

Abstract

The utility model relates to a flexible interconnection system of a low-voltage transformer area, which comprises a first micro-grid and a second micro-grid, wherein the first micro-grid is arranged in an ascending area of any service area of a highway, the second micro-grid is arranged in a descending area of the same service area of the highway, the first micro-grid comprises a first photovoltaic power generation assembly, a first power transformation device, a first fixed charging pile and a first load, the output end of the first photovoltaic power generation assembly is respectively connected with the first load and the first fixed charging pile through the first power transformation device, the second micro-grid is similar, the first micro-grid also comprises a first variable charging pile and a first switch, the second micro-grid comprises a second variable charging pile and a second switch, the power input end of the first variable charging pile is selectively connected to the first power transformation device or the second power transformation device through the first switch, and the power input end of the second variable charging pile is selectively connected to the second power transformation device or the first power transformation device through the second switch. Compared with the prior art, the utility model has the advantages of high reliability and the like.

Inventors

XU XIAOYONG
MA TAO
XU ZEYUAN
WANG YILE
ZHANG XIWEI
XU HUAFENG
WANG LEI
XU XIAOJIE

Assignees

中交光伏科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (10)

1. The utility model provides a flexible interconnection system of low-voltage platform district, includes first little electric wire netting and second little electric wire netting, first little electric wire netting is arranged in the ascending region of arbitrary service area of highway, the second little electric wire netting is arranged in the descending region of the same service area of highway, first little electric wire netting includes first photovoltaic power generation component, first power transformation device, first fixed charge stake, first load, the output of first photovoltaic power generation component connects first load and first fixed charge stake respectively via first power transformation device, the second little electric wire netting includes second photovoltaic power generation component, second power transformation device, second fixed charge stake, second load, the output of second photovoltaic power generation component connects second load and second fixed charge stake respectively via second power transformation device, its characterized in that, first little electric wire netting still includes first variable charge stake and first power transformation switch, the second little electric wire netting includes second variable charge stake and second power transformation switch, first variable charge stake or second power supply input through first power transformation device to first electric pile or second electric power transformation device.
2. The flexible interconnection system of claim 1, wherein the first and second switches are single pole double throw switches, the common end of the first switch is connected to the power input end of the first variable charging pile, the normally closed end is connected to the first power transformation device, the normally open end is connected to the second power transformation device, the common end of the second switch is connected to the power input end of the second variable charging pile, the normally closed end is connected to the second power transformation device, and the normally open end is connected to the first power transformation device.
3. The low voltage bay flexible interconnect system of claim 2 wherein said single pole double throw switch is a relay.
4. A low voltage bay flexible interconnect system as in claim 3, further comprising a controller for controlling the actuation of the relay, a first output pin of the controller being connected to the coil of the first switch and a second output pin being connected to the coil of the second switch, the coil being conductive when the output pin output is high.
5. The flexible interconnection system for low voltage transformer areas of claim 4, wherein said controller is a single chip microcomputer.
6. The flexible interconnection system of claim 1, wherein the first power transformation device and the second power transformation device are identical in structure.
7. The low voltage bay flexible interconnect system of claim 6, wherein said first power conversion means comprises an inverter and a transformer.
8. The low voltage utility flexible interconnect system of claim 1, wherein the first micro-grid further comprises a first energy storage battery and the second micro-grid further comprises a second energy storage battery.
9. The flexible interconnection system of claim 8, wherein the first energy storage battery and the second energy storage battery are lithium batteries.
10. A low voltage area flexible interconnect system in accordance with claim 1, wherein, the first change-over switch and the second change-over switch are manual switches.

Description

Flexible interconnection system for low-voltage transformer area Technical Field The utility model relates to a photovoltaic application system, in particular to a flexible interconnection system for a low-voltage transformer area. Background With the increase of renewable energy demand in the global scope, distributed intermittent energy sources such as solar energy gradually become an important component of an electric power system, and the transition puts higher demands on the flexibility and adaptability of a power grid, on the other hand, with the increasing popularization of electric vehicles, the fluctuation of load increases, and the impact on the power grid end is aggravated. In this connection, some of the skilled in the art, by installing a photovoltaic power generation system in the service area of the highway, which constitutes a micro-grid with the associated loads, makes internal adjustments to the micro-grid by configuring the energy storage device, in particular photovoltaic power generation is firstly used for supplying the loads, secondly for charging piles, and again for battery charging, and if there is still remaining power, is sold to the grid. Conversely, when the photovoltaic output is insufficient to meet the load demand, the battery will release the power to supplement the load, and when the battery is also insufficient, the grid will provide the required residual power. However, in order to reduce the cost of charge management, most of the high-speed service areas currently adopt a side island layout, specifically, one service area is respectively arranged at two sides of the expressway at the same position of the expressway, and the two service areas are not circulated, which causes a problem that when the two service areas are positioned at the head and the tail of a holiday, the two flowing traffic flows of the expressway show significant asymmetry, so that the electricity consumption of the two service areas is unbalanced, but the two photovoltaic power generation devices are similar in geographic position, the total power generation amount is consistent, and in the prior art, the two service areas are used as independent micro-grids and can only interact with the power grid respectively, so that the larger energy loss is caused. Disclosure of utility model The utility model aims to provide a flexible interconnection system for a low-voltage transformer area. The aim of the utility model can be achieved by the following technical scheme: The utility model provides a flexible interconnection system of low-voltage platform district, includes first little electric wire netting and second little electric wire netting, first little electric wire netting is arranged in the ascending region of arbitrary service area of highway, the second little electric wire netting is arranged in the descending region of the same service area of highway, first little electric wire netting includes first photovoltaic power generation component, first power transformation device, first fixed charge stake, first load, the output of first photovoltaic power generation component connects first load and first fixed charge stake respectively via first power transformation device, the second little electric wire netting includes second photovoltaic power generation component, second power transformation device, second fixed charge stake, second load, the output of second photovoltaic power generation component connects second load and second fixed charge stake respectively via second power transformation device, first little electric wire netting still includes first variable charge stake and first power transformation switch, first variable charge stake and second power transformation switch, first variable charge stake is through first power supply input through first switching device to first electric power supply input through first switching device to second switching device. The utility model discloses a power supply device, including first change over switch, second change over switch, normally closed end, normally open end, first change over switch and second change over switch are single-pole double-throw switch, the common end of first change over switch is connected to the power input of first variable charging stake, and normally closed end is connected to first power transformation device, and normally open end is connected to second power transformation device, and the common end of second change over switch is connected to the power input of second variable charging stake, and normally closed end is connected to second power transformation device, and normally open end is connected to first power transformation device. The single pole double throw switch is a relay. The system further comprises a controller for controlling whether the relay is attracted or not, a first output pin of the controller is connected to a coil of the first change-over switch, a second output pin of the controller