Serial compensation device for multiple circuits

Abstract

The invention discloses a serial compensation device for multiple circuits. The serial compensation device comprises at least one voltage source converter, at least two serial transformers and at least one multiple-winding transformer, wherein one sides of the at least two serial transformers are in parallel connection; the other sides are serially connected with the multiple circuits; the alternating current side of the voltage source converter is connected with a parallel side bus bar of the serial transformers through the multiple-winding transformer, so that a power flow function of one or more converter averaging system is realized. The device provided by the invention can be independently mounted on a power transmission system and serve as a static synchronous serial compensator and also can be served as a constituent part of a unified power flow controller, a convertible static compensator, a space power flow controller and a unified power quality regulator in serial connection with the power transmission system device. The device can save the capacity of the converter, can increase the application efficiency of the serial compensation device and can reduce cost and occupied area.

Description

technical field [0001] The invention relates to the field of flexible alternating current transmission, in particular to a series compensation device suitable for multi-circuit lines. Background technique [0002] The equipment of flexible AC transmission system (FACTS) can be divided into series compensation device, parallel compensation device and comprehensive control device. Among them, the parallel compensation device can be directly connected to various levels of power grids, and the series compensation device and the comprehensive control device need to be connected to the power grid in series at one end, so the reliability, flexibility and safety of the device need to be integrated to study its connection mode. [0003] Among series compensation devices and integrated control devices, Static Synchronous Series Compensator (SSSC), Unified Power Flow Controller (UPFC), Interline Power Flow Controller (IPFC) and Switchable Static Compensator (CSC) can all improve the po...

AI Technical Summary

Problems solved by technology

In most cases, the total operating current of the double-circuit lines is far less than the sum of the current ratings of the double-circuit lines. The above scheme causes a serious waste of capacity during normal operation, which will inevitably increase the investment cost and floor area, and at the same time reduce the overall loss. increase

For power grids with more circuit structures, cost, land occupation and equipment loss will further limit the application of series compensation devices

Images