单绕组变压器模型的局部放电定位分析及测试  

Analysis and Test on the Positioning Realization for Partial Discharge of the Single-winding Transformer Model

作　　者：黄望军[1] 陈意军[1] 

机构地区：[1]湖南工程学院电气信息学院,湘潭411104

出　　处：《高电压技术》2009年第11期2693-2697,共5页High Voltage Engineering

基　　金：湖南省自然科学基金(05JJ40094)~~

摘　　要：为了实现变压器故障的准确、快速检测,建立了变压器连续式单绕组模型,该绕组的多导体传输线模型由180根导线构成,基于每匝线圈绕组首末端的连续性条件,以绕组高压首端从其套管末屏的接地线提取电流,绕组末端从其接地线上提取电流为边界条件。以此模型理论分析了绕组不同位置与首末端的电流传输函数,基于对不同饼的分段电流传输函数比曲线具有较大差异现象的考虑,提出并采用距离函数分析法实现对变压器局部放电的定位;将理论分析结果与一组180匝的变压器连续式单绕组实物的测试结果进行了对比分析,测试结果证明了所建立的变压器绕组多导体传输线模型和距离函数法在反映放电脉冲沿变压器绕组的实际传播特性和局部放电定位的有效性。In order to detect transformer fault accurately and quickly, a single-winding transformer model is established. The multi-conductor transmission wire model consists of the 180- turn wires, takes the winding continuity of the first-end of each turn as boundary conditions ,in which the extraction current of the high-voltage winding is the extraction current of the end of casing form, and the extraction current of the winding end is the extracted current of the grounding line. With this model, the current transfer functions of the different windings from the first position to the end position are discussed. Based on the consideration of the great difference of the current transfer function between the different discharge locations, the position of the partial discharge of transformer is realized using the distance function method. The current transfer functions of a 180- turn single-winding transformer are measured. The theoretical and measured results are comparatively analyzed. The comparisons of the theoretical and experimental measured results of current transfer functions show that the method is effective.

关 键 词：单绕组变压器模型 电气定位 变压器 局部放电 电流传输函数 距离函数法 多导体传输线模型 

分 类 号：TM41[电气工程—电器]