中性点经消弧线圈并联可控小电阻接地分析

Analysis on the Neutral Point Grounding via Arc Suppression Coil Paralleled Controllable Small Resistance

简要介绍了中性点不接地、中性点经消弧线圈接地、中性点经小电阻接地等3种传统接地方式及其优缺点比较,阐述了中性点经消弧线圈并联可控小电阻接地方式的动作逻辑,相较传统接地方式,能更快速准确地选出接地线路故障并实现故障隔离,并提出了运维相关对策。

Three traditional grounding modes including neutral point ungrounded, neutral point grounded via arc suppression coil and neutral point grounded via a small resistance are briefly introduced as well as the comparison of their advantages and disadvantages, the action logic of the grounding mode via the a neutral point arc suppression coil paralleled controllable small resistance is expounded, which enables more accurate location of faults relevant to the grounding lines and realization of fault isolation in contrast to the traditional grounding modes, and the corresponding countermeasures on operation and maintenance was proposed.