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Detection of power transformer winding deformation and variation of measurement connections using a hybrid winding model

机译:使用混合绕组模型检测电力变压器绕组的变形和测量连接的变化

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This paper employs a hybrid model of a disc-type transformer winding for frequency response analysis (FRA) of winding deformation and measurement parameter influence. The model is based on multi-conductor transmission line (MTL) theories and treats every disc of a transformer winding as a transmission line. Three types of winding deformation and two types of measurement connection variation have been simulated by changing the values of the corresponding electrical parameters. Meanwhile, the frequency range of FRA is extended to 10 MHz. Various scenarios have been included in the simulation studies and two statistical indicators have been adopted in result analysis. Simulation studies have shown that winding deformation and measurement connection variation can be reflected in frequency response by changing certain parameters of the hybrid model. Simulation results also suggest the frequency ranges in which the failure modes are most distinguishable and their characteristics.
机译:本文采用盘式变压器绕组的混合模型对绕组变形和测量参数影响进行频率响应分析(FRA)。该模型基于多导体传输线(MTL)理论,并将变压器绕组的每个圆盘都视为传输线。通过更改相应的电参数值,可以模拟三种类型的绕组变形和两种测量连接方式的变化。同时,FRA的频率范围扩展到10 MHz。模拟研究中包括了各种场景,结果分析中采用了两个统计指标。仿真研究表明,通过改变混合模型的某些参数,绕组变形和测量连接变化可以反映在频率响应中。仿真结果还提出了故障模式最明显的频率范围及其特性。

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