变压器绕组频响测试法相关问题的研究  

Research on Related Issues of Transformer Winding Based on Frequency Response Testing Method

作　　者：程文锋[1] 喇元[1] 

机构地区：[1]广东电网公司电力科学研究院,广州510080

出　　处：《电测与仪表》2013年第6期41-43,77,共4页Electrical Measurement & Instrumentation

摘　　要：从变压器的基本构造原理和电磁场与电磁波的角度出发,研究了在仪器制造和测量过程中注意的事项。通过变压器绕组参数辨识方法的仿真分析,发现变压器绕组的拓扑结构在频响法测试中发生了根本变化,参数具有非线性,导致普通的电路原理知识已不适用,应该从电磁场的角度来分析。在此基础上,通过理论结合实例全面分析了在整个频响法测试中,铁心已不起作用,起主导作用的是漏电抗而非励磁电抗。本文对于从事变压器研究或电力从业者具有重要的实践意义。This paper studies the matters of the manufacturing and measuring process of the instruments based on the fundamental structure principle of transformers and the electromagnetic field and the electromagnetic wave.Through the simulation analysis of the identification method of the transformer winding parameters,it has been found that the topological structure of the transformer winding has ultimately changed in the Frequency Response Analysis（FRA） testing,which results in nonlinear parameters and inapplicability of common circuit theories and knowledge from the analytical angle of electromagnetic field.On this basis,the overall analysis based on theories combined with practices during the whole process of FRA testing shows that the iron core does not have any effect but the leakage reactance rather than the excitation reactance has the main effect.This paper has great practical significance for those who study transformers and work in the electricity industry.

关 键 词：变压器 绕组变形 非线性 漏电抗 铁心 

分 类 号：TM934[电气工程—电力电子与电力传动]