摘要
以"强化主保护、简化后备保护"为基本思路,2011年6月,辽宁电网500 kV系统零序电流后备保护由定时限方向零序过流保护改为反时限方向零序过流保护。根据RCMbase2000系统提供的故障计算数据,分析由反时限零序电流保护代替定时限零序保护所带来的保护性能的改变,尤其是带来的保护相继动作特性的改变。
According to the principle of ＂Strengthen the primary protection, simplify backup protection, zero-sequence current backup protection changed from definite time directional zero sequence overcurrent protection to inverse-time directional zero sequence overcurrent protection in Liaoning Power Grid 500 kV system in June 2011. By the fault calculation data provided by RCMbase2000 system, it analyzes protection performance changes brought by the inverse time instead of definite time zero sequence protection, especially successive action characteristics changes thereof.
出处
《东北电力技术》
2012年第12期34-36,共3页
Northeast Electric Power Technology
关键词
零序反时限电流保护
速动性
零序保护
相继动作
Zero-sequence inverse time current protection
Rapidity
Zero sequence protection
Successive action
