浅析变压器绕组直流电阻不平衡因素及处理对策

Analysis of Unbalanced Factors and Countermeasures for DC Resistance of Transformer Winding

摘要: 变压器绕组直流电阻不平衡率不但受制作缺陷、组部件本身电阻值影响，还受绕组本身电阻值大小、测试时各绕组实际温度等多种因素影响。本文通过一台直流电阻率有问题的变压器进行分析，采用测试数据对比分析方法，可知影响直流电阻不平衡因素有相位情况、引线长短、外界面积以及空气流速等，提出了处理措施，保证产品整体品质。

Abstract: The unbalance rate of DC resistance in transformer windings is influenced not only by the defects of the production and the resistance value of the component parts themselves, but also by the resistance value of the winding itself and the actual temperature of each winding in the test. In this paper, a transformer with a DC resistivity problem is analyzed, and the test data contrast analysis method is used to determine the factors affecting the unbalanced DC resistance factors, such as phase, length of lead, external area and air velocity, etc., and treatment measures are provided, Ensure the overall quality of the product.