差动保护SEL387装置联结补偿设置的分析与探讨

Analysis and Discussion About Differential protection device SEL387 set linking the compensation

常用的SEL387型差动保护装置的基本特点。对于SEL387联结补偿进行了分析,指出CTC(11)、CTC(0)针对于Y/Δ变压器的设置并不一定都是正确的。结合Z变接地系统发生单相接地故障的分析,得出区外故障可能误动的结论。

This paper introduces the type commonly used in differential protection SEL387 the basic characteristics of devices. SEL387 linked to a number of recognized compensation analysis, pointed out that the CTC （ 11 ）, CTC （0） for the Y / △ transformer settings are not necessarily correct. Z-type transformers grounding system of single-phase ground fault analysis fault zone may maloperation con- clusions. This proposed link SEL387 It should be noted that the issue of compensation .