电力系统自动化2011，Vol.35Issue(12)：95-100,6.
交直流混联电网过电压保护应用分析
Application of Overvoltage Protection in an AC-DC Hybrid Grid
摘要
Abstract
In an AC-DC hybrid grid, load rejection resulting from AC circuit breaker tripping or DC converter locking frequently leads to serious frequency overvoltage in the AC bus of a converter station. To protect the related equipment against damage, overvoltage protection is equipped both in DC and AC power systems. In practice, however, the current overvoltage protection of both systems often lacks coordination with each other, which may lead to incorrect operation. Based on an analysis of maloperation in overvoltage protection, it is pointed out that overvoltage protection on both the AC and DC system sides should meet the selectivity requirement on value setting, and the principle of setting cooperation is proposed. This method has successfully been applied to the high voltage direct current (HVDC) transmission project in Northwest China and its adjacent AC grid, greatly improving the performance of overvoltage protection in the AC-DC hybrid grid.关键词
交直流混联电网/工频过电压/过电压保护Key words
AC-DC hybrid grid/ frequency overvoltage/ overvoltage protection引用本文复制引用
张健康,索南加乐,杨黎明,粟小华,焦在滨..交直流混联电网过电压保护应用分析[J].电力系统自动化,2011,35(12):95-100,6.基金项目
国家自然科学基金重点资助项目(51037005) （51037005）
高等学校博士学科点专项科研基金资助项目(20090201120018). （20090201120018）
