特高压直流输电系统换相失败预测环节对送端电网影响分析

Analysis on Impact of Commutation Failure Prediction on Sending-end Grid in UHVDC Transmission System

摘要:

分析了计及换相失败预测环节对特高压直流工程在逆变侧交流故障情况下的响应行为，探讨了特高压直流 换相失败预测环节对送端电网直流送端电气量的影响以及换相失败预测控制环节参数的灵敏度。结果表明，换相失 败预测环节的投入可以起到减少换相失败持续时间的作用。最后，在逆变侧电压跌落出现换相失败后，分析了其对 传输有功功率恢复速度及送端交直流系统的稳定性能的影响。

Abstract:

Abstract: The response behavior of UHVDC project under AC fault condition of inverter side are analyzed with consideration of commutation failure prediction． The impact of HVDC commutation failure prediction on electrical quantity of DC transmission terminal is discussed，and the sensitivity of the parameters in the predictive control of commutation failure is analyzed． The results show that the input of commutation failure prediction can really reduce the duration of commutation failure． Finally，after the commutation failure occurring in the voltage sag of inverter side，its influence on the recovery speed of active power and the stability of AC / DC system is analyzed．