2015年特高压规划电网华北和华东地区多馈入直流输电系统的换相失败分析  

Analysis on Commutation Failures in Multi-Infeed HVDC Transmission Systems in North China and East China Power Grids Planned for UHV Power Grids in 2015

作　　者：邵瑶[1] 汤涌[1] 郭小江[1] 周勤勇[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2011年第10期9-15,共7页Power System Technology

基　　金：国家电网公司科技项目(XT71-10-024)~~

摘　　要：基于2015年"三华"特高压规划电网的丰大运行方式,采用机电暂态仿真软件PSD-BPA,对华北、华东地区多馈入直流输电系统换相失败问题进行深入研究。研究结果表明,华北、华东地区任一直流发生单/双极闭锁故障时,均不会引起其他直流发生换相失败;华北地区大部分直流逆变站换流母线附近三永故障,不会导致其他直流换相失败;华东地区重要交流通道和逆变站换流母线附近三永故障会导致多回直流同时发生换相失败,但这些换相失败持续时间较短,直流系统能快速恢复正常运行,系统能在不采取任何措施下保持稳定;采用静止无功补偿器进行无功补偿,可有效抑制华东地区直流输电系统换相失败的发生。Based on the summer peak load operation mode in the planning of UHV power grids in North China, Central China and East China in 2015, the commutation failures in multi-infeed HVDC transmission systems in North China and East China power grids are researched in depth by the electromechanical transient simulation software PSD-BPA. Research results show that the unipolar/bipolar blocking occurring in any DC line in North China and East China UHV power grids will not lead to commutation failure in other DC lines of these power grids; three phase-to-ground faults occurring near converter buses in majority DC inverter stations in North China power grid will not lead to commutation failure in other DC lines; three phase-to-ground faults occurring in main transmission channels of East China power grid and that occurring near the converter buses of inverter stations may lead to simultaneous commutation failures in multi DC lines. However, the durations of these ensuing commutation failures are very short, and the DC system can resume normal operation rapidly and the power grid can remain stable without taking any measures. The occurrence of commutation failures at DC transmission lines in East China power grid can be effectively suppressed by reactive power compensation with static var compensators （SVC）.

关 键 词：“三华”电网 多馈入直流输电系统 换相失败 无功补偿 静止无功补偿器 

分 类 号：TM72[电气工程—电力系统及自动化]