摘要
Abstract
The acceptance test of the main transformer in substation is heavy workload with omissions sometimes,for the absence of the current in primary side and secondary side,when the actual operation of grid system can not been sumlated.This paper is based on introducing a method to check rising current at the primary of three winding autotransformer from each side current transformer with station serrice power in 500 kV autotransformer.This method can check the ratio,polarity,groups and the secondary circuit change of current transformer from eatch side,also it can check the continuous of the primary cut-out,switch-disconnector,grounding switch when the primary current flowed through them.Compare with rising current at the primary of the single current transformer that used in engineering,this method improves the efficiency greatly.In addition,according to the derivation of the simple current calculation formula and the current phasor diagram from each side,this method can get the related calculated value before the test,which is convenient to check it with the actual value.关键词
自耦变压器/电流互感器/一次升流/简化计算/相量图Key words
autotransformer/current transformers/rising current at the primary winding/simplified calculation/phasor diagram分类
信息技术与安全科学
