采用专用收发信机闭锁式线路纵联保护相关问题探讨

Some Issues of Blocking Mode Line Pilot Protection Using Special Transceiver

线路纵联保护采用专用收发信机闭锁式时,纵联保护装置接入收发信机收信输入触点和告警触点,而收发信机接入保护装置的发信触点。在这种连接方式下,当收发信机故障或通道阻塞而纵联保护没有及时退出运行时可能导致纵联保护误动作。采用当收发信机故障或通道阻塞时闭锁纵联保护的连接方式及其通道逻辑,可以降低在这种情况下保护发生误动作的概率。

When the blocking mode line pilot relay connects with the special transceiver, the signal receiving contact and the warning contact of the transceiver are connected to the relay, while the transmitting contact of the relay is connected to the transceiver. In such condition, faults of the transceiver or the channel may give rise to misoperation of the line pilot protection. In this paper, a new connecting way is put forward; the suggestion is proposed that the line pilot protection should be locked out when the transceiver or the channel can not work. By such connecting way, the maloperation rate of line pilot protection can be reduced.