脉冲编码调制装置在光纤保护双通道切换过程中的动作解析

Analysis on action of PCM device in switch over process of dual channels of optical fiber protection

通过对500kV潞辛I线P546光纤差动保护在区外故障时的动作分析,指出了NOKIA脉冲编码调制(PCM)装置在光纤差动保护双通道切换过程中出现的收发2个方向上传输延时不一致的问题,说明在光纤差动保护双通道方式中PCM装置的重要性。

According to analysis on action of P546 optical fiber differential protection in 500 kV Luxin transmission line No.1 to response the fault occurred in outside of the zone,it was pointed out that in the dual channels switch over process of the optical fiber protection,the transmission delays of NOKIA PCM device in the two directions of receiving and sending are different;and the importance of the PCM device in the dual channels mode of the optical fiber differential protection was explained.