摘要
借助直流输电系统的等效模型,分析了线路发生接地故障瞬间各特征量的变化情况。以天广直流输电系统为例,根据其基本控制策略,结合实时数字仿真系统仿真结果,分析了在接地故障情况下,如何通过控制方式的切换减缓故障的发展,保证系统的运行,并指出这一阶段各特征量的变化特点,以便于设置合理的后备保护,迅速检测、切除线路故障。
Based on the equivalent model of HVDC system, the variation of some characteristic quantities at the moment of DC line earth fault is discussed. Then, based on the basic control strategy used in Tian-Guang HVDC project, and combined with the simulation on real-time digital simulator （RTDS）, the changeover of control strategy in high-impedance ground fault is analyzed besides how to restrain the development of the fault and guarantee the operation of the system. At last, the variation character of some characteristic quantities during this period is introduced to set reasonable backup protection and trip line faults speedily.
出处
《广东电力》
2008年第10期53-57,共5页
Guangdong Electric Power
关键词
直流输电
线路接地故障
控制策略
实时数字仿真系统
high-voltage direct-current transmission （HVDC）
earth fault of DC line
control strategy
real-time digital simulator （RTDS）
