摘要
随着特高压直流工程的大规模建设,交直流系统之间与直流系统之间的关联越来越紧密。受端电网单一交流故障可能引发多直流同时换相失败,对送受端电网造成冲击。对一起因受端电网交流故障引发的多馈入直流同时换相失败故障案例,采用机电暂态仿真分析换相失败对送受端电网的影响,采用机电—电磁混合仿真方法分析多馈入直流系统间的相互影响,并确定故障可引起直流换相失败的交流线路范围,最后给出了相关建议。
With the rapid development of the ultra high-voltage direct current （UHVDC） power transmission system,the correlation between AC and DC systems or between DC systems is becoming increasingly close.A single AC fault at the receiving end power grid may trigger simultaneous commutation failure in multi-infeed HVDC transmission systems,which will significantly impact both the sending and receiving end power grid.The paper presented a detailed analysis of an actual commutation failure in multi-infeed HVDC transmission systems caused by AC fault,the impact on the sending and receiving end power grid based on electromechanical transient simulation,the correlation effect of DC systems and the range of the AC fault that can trigger the commutation failure by means of electromagnetic transient and electromechanical transient hybrid simulation.Finally,relevant suggestions are made.
出处
《电力系统自动化》
EI
CSCD
北大核心
2015年第4期141-146,共6页
Automation of Electric Power Systems
关键词
换相失败
多馈入直流
电磁—机电混合仿真
功率振荡
commutation failure
multi-infeed direct current
electromagnetic and electromechanical hybrid simulation
power oscillation
