1·In this paper, the pickup units of transmission line relaying are analysed, the improving scheme of micro processor - based protection is put forward.
通过对线路保护中启动元件的分析，提出了对现有微机保护的改进意见。
2·How to detect the fault line quickly and accurately is an important issue in electric power system protective relaying.
如何准确地检测出故障线路一直是电力系统继电保护的重要研究课题。
3·Each 500 kV transmission line will be protected by two primary pilot relaying systems with a backup relaying to achieve primary and secondary protection.
由两个主控制继电保护系统对各条500千伏传输线进行保护，该控制继电保护系统上装有一只后备继电器，以实现初级保护与二次保护。
4·The dynamic power frequency impedance of TCSC is of great importance to the analysis of protective relaying characteristics on transmission line with TCSC.
TCSC的动态基频阻抗特性分析对研究含TCSC线路上的线路保护的特性具有重要意义。