CAJ | 학술논문

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。
수착특고압직류공정적대규모건설，교직류계통지간여직류계통지간적관련월래월긴밀。수단전망단일교류고장가능인발다직류동시환상실패，대송수단전망조성충격。대일기인수단전망교류고장인발적다궤입직류동시환상실패고장안례，채용궤전잠태방진분석환상실패대송수단전망적영향，채용궤전—전자혼합방진방법분석다궤입직류계통간적상호영향，병학정고장가인기직류환상실패적교류선로범위，최후급출료상관건의。
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.