接地点对频响法绕组变形测量的影响  

Influence of Grounding Point on Winding Deformation Measurement by Frequency Response Method

作　　者：毕聪来 戚革庆 孙喆 高千 BI Conglai;QI Geqing;SUN Zhe;GAO Qian(State Grid Dalian Power Supply Company,Dalian,Liaoning 116085,China)

机构地区：[1]国网大连供电公司,辽宁大连116085

出　　处：《东北电力技术》2023年第4期26-29,共4页Northeast Electric Power Technology

摘　　要：变压器是变电站的核心设备,具有改变电压等级的作用。当变压器遭受进区短路时,绕组会发生变形,存在安全隐患。检修过程开展的电气试验项目,对于分析变压器运行状态至关重要。频响法绕组变形是目前现场应用较广的用来分析变压器情况的试验方法,通过分析端口参数的频域图谱来分析判断绕组的变形情况。为此分析了3种接地点对频响法绕组变形影响导致误判的情况及原因,为现场试验人员操作提供参考。The transformer is the core equipment of the substation,which plays the role of changing the voltage level.When the transformer is short-circuited in the incoming area,the windings will be deformed and will have a safety hazard.The electrical test items carried out during the maintenance process are very important for analyzing the operating status of the transformer.The frequency response method winding deformation is currently a widely used test method for analyzing the transformer condition in the field.By analyzing the frequency domain map of the port parameters,the deformation of the winding can be analyzed and judged.It analyzes the situation and causes of misjudgment caused by the influence of the grounding point on the winding deformation by the frequency response method in three cases,and provides reference for the operation of the field testers.

关 键 词：电力变压器 绕组变形 频响法 

分 类 号：TM41[电气工程—电器]