Power transformer is one of the most important and expensive electrical equipment in the power grid.It can help to re-alize reliable transmission and flexible distribution of electric energy,whose health status directly affects the safe and stable operation of power grid.In order to improve the fault diagnosis accuracy of transformer winding,according to the equivalent circuit parameters simulation before and after winding change,different frequency response characteristic curves are obtained,and the variation rule of frequency response curve is summarized and analyzed.The results show that the influence of winding inductance of power transformers on the low frequency region of the frequency response curve is great,and the effect of the equivalent longitudinal capacitance and the equivalent grounding capacitance on the middle and high frequency region of the frequency response curve is also significant.The re-search results can provide reference for transformer winding fault detection.
关键词
电力变压器/等效电路模型/绕组变形/频率响应特性/故障诊断
Key words
power transformer/equivalent circuit model/winding deformation/frequency response characteristics/fault diag-nosis
维普
万方数据