CAJ | 학술논문

随着糯扎渡和溪洛渡直流工程的陆续投运，南方电网“强直弱交”的格局越来越明显，直流线路故障特别是雷击引起的故障导致的直流系统闭锁严重影响着南方电网的安全稳定运行。选取南方电网所辖直流工程2013年发生的三次典型直流线路遭受雷击故障致直流闭锁的事件，剖析了电弧未熄灭、绝缘强度未恢复、连续遭受雷击等不同情况下的直流控制保护响应，得到线路故障重启逻辑中去游离时间和故障计数模块窗口时间设置的不足。提出了线路故障情况下避免直流不必要闭锁停运的建议。
수착나찰도화계락도직류공정적륙속투운，남방전망“강직약교”적격국월래월명현，직류선로고장특별시뢰격인기적고장도치적직류계통폐쇄엄중영향착남방전망적안전은정운행。선취남방전망소할직류공정2013년발생적삼차전형직류선로조수뢰격고장치직류폐쇄적사건，부석료전호미식멸、절연강도미회복、련속조수뢰격등불동정황하적직류공제보호향응，득도선로고장중계라집중거유리시간화고장계수모괴창구시간설치적불족。제출료선로고장정황하피면직류불필요폐쇄정운적건의。
The feature of strong DC system and weak AC system in the CSPG becomes more obvious after Nuozhadu and Xiluodu HVDC system was put into operation. Transmission line fault, especially HVDC system block caused by lightning stroke fault impacts the safety and stability of power network for CSPG. This paper selects three typical lightning stroke fault which led to HVDC block in CSPG in 2013 to analyze response strategy of control and protection logic in different cases such as arc is not extinguished, dielectric strength is not restored, and transmission line is struck by lighting continuously. It points out the shortage of deionization time and the set time of fault counter. Finally, it suggests to avoid unnecessary HVDC system outage.