A flexible switching station interconnection structure with multiple electric energy comprehensive distribution

Abstract

The invention relates to a flexible switching station interconnection structure with multiple electric energy comprehensive distribution. The interconnected structure of the flexible switching stationcomprises a plurality of flexible switching stations as nodes, wherein the input end of each flexible switching station is connected with a high-voltage alternating current bus bar, and the output end of the flexible switching station is respectively connected with a low-voltage alternating current bus bar and a low-voltage direct current bus bar. The ends of low voltage AC busbars are connectedby flexible multi-state switches, and the ends of low voltage DC busbars are connected by DC-DC converter; the low-voltage alternating current bus bar and the low-voltage direct current bus bar are connected with a load, an energy storage element and a distributed power supply. The flexible switching station with AC / DC voltage conversion and power distribution functions enables a flexible multi-state switch and a DC-DC converter to be interconnected. Compared with the traditional substation, the flexible switching station interconnected system has the advantages of active power flow control, flexible topology construction, distributed energy consumption, multi-voltage level interconnection, AC / DC unified distribution and so on, which improves the reliability and diversity of power supply.

Description

Technical field [0001] The invention relates to a flexible switch station. Background technique [0002] In the traditional power distribution structure of substations, radial power supply structures are often used. The substations are isolated from each other, and the power supply requirements and power flow must be designed in advance. With the continuous development of cities, the instantaneous power demand of some substations continues to increase, and it is difficult for a single substation to meet special load requirements. During the period, some people also proposed the ring-shaped 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, which put forward very strict requirements on the reliability and cost of the tie switch. Traditional mechanical switches have short lifespan, slow response, discontinuous power regulation, and the b...

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

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