高压线路保护中动态稳定破坏检测元件的实现  

Realization of Dynamic Instability Detecting Relay in High Voltage Line Protection Devices

作　　者：毛鹏[1] 段玉倩[2] 许扬[1] 李小滨[3] 

机构地区：[1]江苏省电力公司技术中心 [2]中国南方电网有限责任公司电网技术研究中心 [3]烟台东方电子信息产业股份有限公司,山东省烟台市264001

出　　处：《电力系统自动化》2006年第2期86-89,共4页Automation of Electric Power Systems

摘　　要：提出了一种新型的系统动态稳定破坏检测方法,通过构建正序能量函数检测动态稳定破坏导致系统起振过程中测量电流形成的喇叭口形状的变化趋势,来识别系统是否失稳。此检测元件根据起振快慢具有一定的反时限特性,且实现简单、可靠。经过大量RTDS测试表明,所提出的失稳检测元件能够确保可靠识别出系统失稳,在实现保护有效闭锁的基础上,提高了高压线路保护装置的动作性能指标。A novel detecting method for system dynamic instability is presented. The proposed method is based on an energy function to detect the changing trend of measured current amplitude, whose shape is like a bell mouth. This detecting relay is reliable and simple. Extensive testing results based on RTDS show that instability detecting relay proposed in this paper can ensure the detection of system dynamical instability, and hence improve the performance of high voltage power system protection.

关 键 词：线路保护 振荡闭锁 动态稳定检测 

分 类 号：TM773[电气工程—电力系统及自动化]