CAJ | 학술논문

电力变压器绕组变形导致内部匝间故障的事故率已升至首位，成为影响变压器安全稳定运行的重要因素。变压器运行过程中绕组变形导致绕组漏磁场发生变化，进而引起漏感参数发生变化。该文根据这一基本特征，研究绕组参数和变形程度之间的关系，利用有限元模型计算变压器的磁场能量和电感参数，采用工程计算法对该模型的正确性进行校验，继而提出利用支持向量机模型对绕组变形进行分类，并通过优化的网格搜索法对参数进行优化。仿真结果表明，所提方法具有较高的分类准确度，适用于变压器绕组变形的在线监测。
전력변압기요조변형도치내부잡간고장적사고솔이승지수위，성위영향변압기안전은정운행적중요인소。변압기운행과정중요조변형도치요조루자장발생변화，진이인기루감삼수발생변화。해문근거저일기본특정，연구요조삼수화변형정도지간적관계，이용유한원모형계산변압기적자장능량화전감삼수，채용공정계산법대해모형적정학성진행교험，계이제출이용지지향량궤모형대요조변형진행분류，병통과우화적망격수색법대삼수진행우화。방진결과표명，소제방법구유교고적분류준학도，괄용우변압기요조변형적재선감측。
Internal turn-to-turn fault caused by power transformer winding deformation has risen to the first of all the faults, which have a significant effect on the safety and stable operation of transformer. The winding deformation will cause winding leakage magnetic field to change during the running of the transformer, then lead to the change of leakage inductance. According to the basic characteristics, relationship between the winding parameters and deformation was studied in this paper. After that, the energy of magnetic field and inductance parameters was calculated by the finite element model of transformer, which was verified by the method of engineering calculation. Support vector machine (SVM) model was proposed to classify the winding deformation, which was optimized by grid search algorithm in this paper. The simulation results show that the classification method has a high reliability, and is suitable for online monitoring in transformer winding deformation.