高频保护专用收发信机抗干扰及改进措施

Special transceiver′s anti-interference and improvement measures in HV pilot protection

目前,高压线路纵联保护广泛使用输电线路作为载体,利用收发信机传递保护信息。虽然输电线路作为载体可靠性较高,但是中间环节却比较多。对于闭锁式的高频保护,其运行的主要问题是收发信机受外部干扰误停信,高频通道受外部干扰阻塞,这样,外部故障时将导致保护误动。近几年来,不同型号的收发信机经过多次改进,性能和可靠性有了进一步提高。对过去的情况做一点回顾,并试图通过运行中发现的收发信机的另外一个问题,以实际例子叙述收发信机应该改进的一个方面,提高其抗干扰能力,增加其可靠性。

The pilot protections use power transmission line as carrier and utilize the special transceiver to transmit information of protections. For blocking HV protection,its special transceiver suffers interference from outside easily to lead to protection maloperation. Through discovered other problems in operations, the paper recounts an aspect of transceiver should be improved to increase its reliability and alility of interference.