Study on Fault Characteristics of Multi-send HVDC System and its Impact on Protection

摘要：

　　When fault occurs in the AC system, the HVDC control system responses quickly and determines HVDC operating point, which makes the fault characteristics of HVDC system different from traditional AC system, and HVDC system will influence the action characteristics of protections in the AC-DC interconnected system, For the single-send and multi-send HVDC systems, the HVDC equivalent characteristics under different fault conditions are analyzed in the paper, and the influence of HVDC system on distance protection based on variation of power-frequency components and current differential protection are derived.It is showed that the protection range of distance protection reduces greatly and the sensitivity of steady component current differential protection decreases under certain conditions.At last, simulation results of single-send and three-send HVDC system using PSCAD/EMTDC testify the conclusions correctness

关键词： Current differential protection Distance protection Equivalent current Equivalent impedance Fault characteristics HVDC control system Multi-send HVDC system

作者: Jinping Liu Haifeng Li Guohao Mai Maosheng Ding Xiaoli Wang

作者单位: Department of Electric Power, South China University of Technology, Guangzhou, China and Ningxia Electric Power Company,Yinchuan.China

会议类型: 国际会议

会议名称: 第六届现代电力系统自动化和保护国际会议

会议地点: 南京

会议语种:英文

页码: 90-96

在线出版日期: 2015-09-21（万方平台首次上网日期，不代表论文的发表时间）