高频保护在旁路代路时的研究与应用

Realizing High Frequency Protection in Bypass Substitution Condition

在220kV九分场变施工过程中,220kV旁路PX F-111及PX W11C-101G6B型微机保护装置配置的G SF-6B型高频收发信机只具有单一工作频率,无法通过高频通道的转换和工作频率的切换来实现高频保护,所以当旁路代路时,只能将高频保护退出,对线路的安全运行造成了很大影响。针对这一实际情况,文章详细介绍了高频收发信机的工作原理,提出了旁路代路时实现高频保护的原理和具体实施方案。该方案实施后,极大地提高了系统供电的可靠性。

In the main transformer construction at 220kV No.9 Station,GSF-6B type high-frequency signal transmitter-receiver of PXF-111 type 220kV bypass and PXW11C-101G6B type microcomputer protector possessed only single working frequency, so that high-frequency protection could not be realized by means of high-frequency channel change-over and working frequency diversion. To solve this problem, the principle of realizing high-frequency protection in bypass substitution was illustrated and concrete scheme was presented in this paper.