Configuration system and method for backup automatic switch in alternating current and soft direct current hybrid power supply area

Abstract

The invention provides a configuration system and a method for a backup automatic switch in an alternating current and soft direct current hybrid power supply area. The system comprises a 10-kilovolt alternating current bus bridge which comprises a negative direct current bus bridge and a positive direct current bus bridge, an interconnection reactor which is connected with the 10-kilovolt alternating current bus bridge and an interconnection arm which is connected with the interconnection reactor. One end of an interconnection direct current capacitor CP1 is connected with a turn-off device VTP1, one end of an interconnection direct current capacitor CP2 is connected with a turn-off device VTP2, and an interconnection direct current capacitor CP3 is connected with the other end of the interconnection direct current capacitor CP2 and is connected with the ground. An interconnection direct current switch QFP1 and an interconnection direct current switch QFP2 are respectively connected with the positive direct current bus bridge and the negative direct current bus bridge and can play a role of isolation when stoppage occurs. According to the configuration system and the method for the backup automatic switch in the alternating current and soft direct current hybrid power supply area, an alternating current transmission and distribution power grid area and a soft direct current power distribution network are prevented from becoming islands in the alternating current transmission and distribution power grid and the soft direct current transmission and distribution power grid hybrid power supply period, and a problem of interconnecting two power grid areas is solved.

Description

technical field [0001] The invention relates to the technical field of automatic switching configuration of AC and flexible DC transmission and distribution networks, in particular to a system and method for configuring automatic switching of AC and DC hybrid power supply areas. Background technique [0002] At present, most of the urban and rural distribution network systems in my country use 10 kV AC as the main power supply voltage. Due to the rapid economic development in recent years, problems such as insufficient power supply capacity and extreme shortage of resources in stations and line corridors have been exposed in urban centers with high load density, and excessive voltage drops in remote rural areas with low loads, causing user voltage The quality is difficult to be guaranteed, and the power supply distance is limited. Therefore, the distribution network is powered by a flexible DC transmission and distribution network. [0003] With the development of power e...

AI Technical Summary

Problems solved by technology

[0006] However, the current AC transmission and distribution network technology assumes the main position, and the flexible DC distribution network system is mostly transformed on the basis of AC transmission and distribution network technology. During the transformation process, it will be a long-term system engineering. According to domestic and foreign transformation experience, the entire engineering process may last up to several years or so

Images