继电保护数字复用通道的时延

Transmission Delay of Multiplex Channel Used for Protection Relays

针对不同继电保护装置显示的通道时延内涵各不相同,给出了通道时延的定义,并对其构成进行了分析。介绍了通道时延的2种测量方法:一种是用误码仪测量不同路由的通道时延,间接计算通道各环节的实际时延,并由此根据实际通道构成计算通道时延;另一种是用逻辑分析仪记录通道两端保护装置通信收、发信号,以全球定位系统(GPS)分脉冲作为时间基准,测量实际通道的单向时延,验证同路由通道双向时延的一致性。为保护选型设计及现场调试、运行提供参考。

This paper defines the transmission delay and analyzes its structure. Two methods for measuring the transmission delay are presented. One consists in using a digital transmission analyzer to measure the transmission delay of different routes, indirectly calculate the actual delays of all parts of different routes used for protection relays as well as the actual time delay of the transmission channel, and the other in using a logic analyzer to record the sending and transmitting times of the protection relays, to calculate the delay time based on GPS and to validate the identity of the two-directional delay times.