A flexible switching station interconnection structure with comprehensive distribution of multiple electric energies

Abstract

A flexible switching station interconnection structure with comprehensive distribution of multiple electric energies. The interconnection structure of the flexible switch station is composed of several flexible switch stations. The input end of each flexible switch station is connected to the high-voltage AC bus, and the output of the flexible switch station is respectively connected to the low-voltage AC bus and the low-voltage DC bus; the end of the low-voltage AC bus It is connected through a flexible multi-state switch, and the ends of the low-voltage DC bus are connected through a DC-DC converter; both the low-voltage AC bus and the low-voltage DC bus are connected with loads, energy storage components and distributed power sources. The invention interconnects the flexible switching station with functions of AC and DC voltage conversion and power distribution through flexible multi-state switches and DC-DC converters. Compared with traditional substations, the flexible switch station interconnection system has the advantages of active power flow control, flexible topology construction, distributed energy consumption, multi-voltage level interconnection, and unified distribution of AC and DC, which improves the reliability and diversity of power supply.

Description

technical field [0001] The invention relates to a flexible switching station. Background technique [0002] In the traditional substation power distribution structure, a radial power supply structure is often used. The substations are isolated from each other, and the power supply demand and power flow need to be designed in advance. With the continuous development of the city, the instantaneous power demand of some substations continues to increase, and it is difficult for a single substation to meet the special load demand. During the period, some people also proposed the ring interconnection structure of the substation, and provided power support through the tie switch, but the problem was that the series connection of the substation increased the short-circuit current, and put forward very strict requirements on the reliability and cost of the tie switch. Traditional mechanical switches have short service life, slow response, discontinuous power regulation, and the brea...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the unstable interconnection structure of traditional substations, increase the function of DC interconnection, solve the problems of high reliability interconnection between substations and different forms of grid voltage interconnection, and propose a flexible switch station interconnection structure with comprehensive distribution of various electric energy

Images