调压器中性点接线对变压器空载电流的影响  

Experimental Research on the Influence of Neutral Point Connection Mode on Transformer No-load Current

作　　者：杨博闻 陈天翔 徐会凯 赵燊元 刘磊[1] YANG Bo-wen;CHEN Tian-xiang;XU Hui-kai;ZHAO Shen-yuan;LIU Lei(College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学,四川成都610059

出　　处：《变压器》2022年第6期53-57,共5页Transformer

基　　金：国家自然科学区域联合创新基金项目(U19A2080)。

摘　　要：当采用三相调压器接市电做变压器空载试验时,通常无法避免调压器输出试验电压不平衡对空载电流的影响。为此本文中作者研究了一台35kV电力变压器空载试验中,三相调压器中性点不同连接方式对变压器空载电流的影响。分析了中性点不同连接方式下空载电流的变化原因,得出用三相调压器做变压器空载试验时,调压器中性点与电源侧中性点相连可避免输出相电压不平衡对变压器空载电流的影响,最后通过Pearson相关分析得到此接线下空载电流与标准测量值相关性高达99.9%。When using a three-phase regulator connected to the mains to do the transformer no-load test, it is impossible to avoid the impact of unbalanced regulator output test voltage on the no-load current. To this end, the test studied a 35 kV power transformer no-load test, the three-phase regulator neutral point of different connections to the transformer no-load current. Analyzed the reasons for the change of no-load current under different connection methods of the neutral point, and concluded that when the three-phase regulator is used for transformer no-load test, the neutral point of the regulator can be connected to the neutral point of the power side to avoid the impact of unbalanced output phase voltage on the transformer no-load current, and finally through Pearson correlation analysis to obtain the correlation between the no-load current and the standard measurement value of 99.9% under this connection.

关 键 词：变压器 中性点接线方式 空载电流 调压器 

分 类 号：TM406[电气工程—电器]