【摘要】 变压器绕组直流电阻测试是变压器重要试验项目,为了快速准确测试变压器绕组直流电阻,人们提出了许多有效的办法,但终未摆脱时间常数的约束.此文论述了通过采集动态电流曲线前面一小段有限个数据点,由计算机软件拟合得到动态电流随时间的表达式,进而准确快速测试绕组直流电阻的方法.更多还原

【Abstract】 Measurement of transformer wire-wound’s DC resistance is an important test item of transformer.A lot of effective methods were proposed to exactly and rapidly measure transformer wire-wound’s DC resistance.However,people were not finally able to rid themselves of restriction of time constant.The paper discusses the method,where limited sample points were collected from a short portion before the start segment of dynamic current curve,and the dynamic current expression was gained by computer software fitting,thereby transformer wire-wound’s DC resistance was measured exactly and rapidly.更多还原