电力变压器短路承受能力试验相电流精确测量方法  

Phase Current Accurate Measurement Method of Power Transformer Short Circuit Withstand Capability Test

作　　者：何东升 许呈盛 刘光祺 罗海凹 丁晓军 HE Dongsheng;XU Chengsheng;LIU Guangqi;LUO Haiao;DING Xiaojun(China National Quality Supervision and Testing Center for Smart Grid Transmission and Distribution Equipment,Dongguan 523325,China;Guangdong University of Technology,Guangzhou 510006,China;Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Yunnan 650217,China)

机构地区：[1]国家智能电网输配电设备质量监督检验中心,广东东莞523325 [2]广东工业大学,广东广州510006 [3]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《电器与能效管理技术》2018年第14期42-45,50,共5页Electrical & Energy Management Technology

基　　金：国家质量监督检验检疫总局科技计划项目(2016QK026)

摘　　要：介绍了变压器短路试验的基本情况和标准对短路试验相电流测量的规定要求。针对目前三角形联结绕组的变压器相电流无法直接测量的问题,提出了一种等效线路测量方法。通过公式推导和理论计算,搭建电路图,实现动态系统建模、仿真和分析,并对此测量方法进行了应用验证。所提测量方法符合标准要求,且提高了检验效率和测量精度,保证了检测的公正性和故障定位的有效性,具有一定的推广和借鉴意义。This paper introduced the basic conditions of transformer short-circuit test and the requirements of standard for phase current measurement of short-circuit test.In view of the problem that the transformer phase current in triangle junction winding can not be measured directly without external lead terminal,ameasurement method of equivalent circuit was proposed,which,through formula derivation and theoretical calculation,constructs the circuit diagram,realizes the dynamic system modeling,the simulation and the analysis,and carries on the application verification to this measuring method.This measurement method meets the standard requirements,and improves the test efficiency and measurement accuracy,and ensures the fairness and effectiveness of the detection of the fault location,it has certain promotional and reference significance.

关 键 词：变压器 短路试验 相电流测量 测量方法 

分 类 号：TM406[电气工程—电器]