分布電容法在變壓器繞組變形故障中輔助分析
劉威峰1，馬飛越1，雍福全2，常彬1
（1 國網寧夏電力公司電力科學研究院，寧夏 銀川 750011；2 國網中衛供電公司，寧夏 中衛 755000）
摘 要：針對某供電公司110 kV 變電站一臺三相有載調壓電力變壓器存在繞組變形的可能性，采用分布電容法結合常用的頻率響應法、電抗法、繞組介質損耗因數和電容量等多種方法分析該臺電力變壓器繞組是否變形，以及是何繞組出現變形。經變壓器返廠解體后發現中壓繞組、低壓繞組確實存在繞組變形，確定了分布電容法可作為繞組變形分析的輔助方法。
關鍵詞：電力變壓器；頻率響應法；電抗法；介質損耗因數；分布電容法
中圖分類號：TM403.2；TM407 文獻標識碼：A 文章編號：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
參考文獻
[1] DL/T 911—2004 電力變壓器繞組變形的頻率響應分析法[S].
[2] DL/T 1093—2008 電力變壓器繞組變形的電抗法檢測判斷導則[S].
[3] DL/T 474.3—2006 現場絕緣試驗實施導則 第3 部分：介質損耗因數tanδ試驗[S].
