三相电压不平衡对变压器空载试验的影响研究  

Study on Influence of Three-phase Voltage Unbalance on Transformer no-load Text

作　　者：赵燊元 陈天翔 徐会凯 杨博闻 任欣悦 ZHAO Shenyuan;CHEN Tianxiang;XU Huikai;YANG Bowen;REN Xinyue(College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《上海电力大学学报》2022年第3期245-250,共6页Journal of Shanghai University of Electric Power

基　　金：国家自然科学区域联合创新基金(U19A2080)。

摘　　要：以型号为S750/35/0.4的三相三柱式电力变压器为对象进行空载试验研究,分析了三相电压不平衡率与空载试验参数的关系。采用3组单相调压器与1组三相调压器分别模拟三相试验电压平衡与不平衡的状态,使用4种不同的空载试验方式,对变压器空载电流与空载损耗进行试验研究。结果发现:三相试验电压不平衡严重影响变压器空载电流与空载损耗的测量准确性;在试验变压器不连接中性点的情况下,三相试验电压不平衡率低于1.36%时,空载电流百分数测量相对误差在-5.63%以内,空载损耗测量相对误差在-2.85%以内。Taking S750/35/0.4 three-phase three-column power transformer as the research object of no-load test,the relationship between three-phase voltage unbalance rate and no-load test parameters is analyzed for the purpose of research.Using four different ways of no-load test,three groups of single-phase voltage regulator and a set of three-phase voltage regulator are used to respectively simulate balance and imbalance of three phase test voltage no-load current of transformer with no-load loss analysis.And experimental study found three-phase voltage imbalance seriously influences no-load current of transformer with no-load loss measurement accuracy.Under the condition that the test transformer is not connected to the neutral point,when the three-phase test voltage unbalance rate is lower than 1.36%,the relative error of no-load current percentage is less than -5.63%,and the relative error of no-load loss is less than -2.85%.

关 键 词：变压器 空载试验 三相试验电压不平衡率 空载电流百分数 空载损耗 相对误差 

分 类 号：TM406[电气工程—电器]