摘要
直流控制是发展高压直流输电的核心内容。分析了整流测定电流控制、逆变侧定关断角控制以及低压限流环节控制,特别的分析了低压限流环节与一次换相失败以及连续换相失败之间的关系。分析结果表明不同控制环节共同作用,对维持直流输电系统的安全稳定运行具有重要作用;低压限流环节对预防换相失败的发生也具有积极作用。
DC control is the core content of line-commutated converter high voltage direct current （LCC-HVDC） system. The con- stant-current control, constant extinction angle control and the VDCOL are analyzed in this paper. In addition, the relationship between VDCOL and the commutation failure is researched in detail. The analysis results show that different controls work together, and maintain the security and stability of DC power system; the VDCOL can prevent the commutation failure from occurring.
出处
《云南电力技术》
2015年第4期9-11,15,共4页
Yunnan Electric Power
关键词
直流输电
定电流控制
定关断角控制
低压限流
LCC-HVDC
constant-current control
constant extinction angle control
VDCOL
