来宾 500 kV 变电站来—梧线 TLS 保护误动原因的试验分析

Experimental Investigation of Malfunction Cause for TLS Protection Equipment of 500 kV Laibin Substation’s Lai-Wu Transmission Line

针对来—梧线ＴＬＳ保护误动的情况，用保护试验仪对来—梧线进行了空投、空切模拟试验，对ＴＬＳ保护装置的动作现象、试验结果进行了分析。分析表明，所有美国ＧＥ公司生产的ＴＬＳ１Ｂ保护只要按投入高值旁路开关和阻抗倍率取０．２５来整定参数，就会出现相间一段误动跳三相的现象。

In view of the malfunction of Lai-Wu transmission line’s TLS protection,no-load operation and no-load switching simulation tests were made by using protection tester and the malfunction conditions and test results are analyzed.A thorough analysis has shown that if parameters are set ( mainly with high value by-pass switch closing and 025 of impedance rate taking)for all TLS1B protections manufactured by GE Co,three-phase tripping occurs due to a section of phase-tophasemalfunction.