电流互感器二次开路对角形接线一次电流的影响

The Impact of Secondary Open Circuit of Current Transformer on Angel Scheme of Primary Current

基于等效阻抗的方法,通过对500 k V气体绝缘全封闭组合电器的电流互感器二次绕组开路的工程实例进行分析,提出一种角形接线电路分析方法。阐明了电流互感器二次绕组开路对角形接线一次阻抗的影响,以及造成一次回路电流不平衡的原因。同时对500 k V电流互感器二次绕组组装的生产和监造环节提出建议。

With the method of equivalent impedance, a new approach is presented to analyze the angel scheme circuit according to the research of an open circuit of secondary winding of a 500 k V GIS current transformer. This paper mainly illustrates the impact of the open secondary circuit of current transformer on primary impedance of angel scheme and the reasons leading to current unbalance of primary circuit. Meanwhile, it also puts up some suggestions about production process and supervision link during the assembly procedure of secondary winding of 500 k V current transformer.