建筑群中压配电系统单相接地保护技术探讨

Discussion about Single Phase Grounding Protection in Medium Voltage Power Network of Building Complex

分析了当前大型建筑物和建筑群中压配电网各种接地方式。指出选择中压接地方式的关键问题是目标配电网的电容电流及分布问题。针对不同情况,分析了不同条件下非有效接地方式的选用原则,并给出一种以中性点经消弧线圈及接地变压器接地为基础的自动跟踪补偿消除接地电弧的技术。

Several grounding methods used in current medium voltage power network of large-scale building and building complex were analyzed. It was pointed out that the key problems of medium voltage grounding methods are the current and distribution of capactive in objective power network. In consideration of the different status, not only con- firmation principle of non-effective grounding methods under various conditions, but also small current line selection and protection technology for single phase grounding were described.