分布电容法在变压器绕组变形故障中辅助分析
 

刘威峰¹，马飞越¹，雍福全²，常彬¹
（1 国网宁夏电力公司电力科学研究院，宁夏 银川 750011；2 国网中卫供电公司，宁夏 中卫 755000）
 

    摘 要：针对某供电公司110 kV 变电站一台三相有载调压电力变压器存在绕组变形的可能性，采用分布电容法结合常用的频率响应法、电抗法、绕组介质损耗因数和电容量等多种方法分析该台电力变压器绕组是否变形，以及是何绕组出现变形。经变压器返厂解体后发现中压绕组、低压绕组确实存在绕组变形，确定了分布电容法可作为绕组变形分析的辅助方法。
    关键词：电力变压器；频率响应法；电抗法；介质损耗因数；分布电容法
    中图分类号：TM403.2；TM407     文献标识码：A      文章编号：1007-3175(2016)12-0048-04
 

Auxiliary Analysis of Distributed Capacitance Method Used in
Transformer Winding Deformation Fault

 

LIU Wei-feng¹, MA Fei-yue¹, YONG Fu-quan², CHANG Bin¹
（1 Power Research Institute of State Grid Ningxia Electric Power Company, Yinchuan 750011 , China;
2 State Grid Zhongwei Electric Power Supply Company, Zhongwei 755000, China）
 

    Abstract: In allusion to that a three-phase on-load voltage regulation power transformer has the possibility of winding deformation in 110 kV substation of certain power supply company, this paper adopted the distributed capacitance method combined with the common frequency response method, the reactance method, the winding dielectric loss factor and the capacitance of power transformer etc to analyze whether or not this power transformer winding deformed and which winding had deformation. Via disassembling the returned transformer, it is found that there existed winding deformation in medium-voltage and low-voltage windings, which confirms that the distributed capacitance method can be used as auxiliary methods of winding deformation analysis.
    Key words: power transformer; frequency response method; reactance method; dielectric loss factor; distributed capacitance method
 

参考文献
[1] DL/T 911—2004 电力变压器绕组变形的频率响应分析法[S].
[2] DL/T 1093—2008 电力变压器绕组变形的电抗法检测判断导则[S].
[3] DL/T 474.3—2006 现场绝缘试验实施导则 第3 部分：介质损耗因数tanδ试验[S].