主變近區短路后的電氣試驗分析與診斷
劉愛華
廣東電網公司江門供電局，廣東 江門 529000
摘 要：220 kV 變電站10 kV 出線電流互感器CT 突然發生三相短路，主變受到短路電流沖擊，停運后通過常規試驗絕緣電阻、直流電阻及氣體色譜分析，并結合繞組變形頻響分析方法進行綜合分析，準確地判斷了變壓器低壓繞組B 相存在輕微變形的故障性質，為變壓器是否重新投入運行或及時退出運行提供了重要參考。
關鍵詞：變壓器；絕緣電阻；直流電阻；色譜分析；繞組變形
中圖分類號：TM406 文獻標識碼：B 文章編號：1007-3175(2013)11-0050-03
Analysis and Diagnosis of Main Transformer near Zone Electrical Short Circuit Test
LIU Ai-hua
Jiangmen Power Supply Bureau of Guangdong Grid Coporation, Jiangmen 529000, China
Abstract: Three-phase short circuit suddenly happened in 10 kV outlet line current transformer (CT) of 220 kV substation. The shortcircuit current had impacts on the main transformer, so the main transformer stopped operation to be carried out test inspection. Analysis was made to routine experiments of insulation resistance, direct current resistance and gas chromatographic. Combined with the analysis method of winding deformation frequency response, this paper analyzed various data to correctly judge the faults property at B-phase of the main transformer, which could be used to guide whether the transformer should come on the line or not.
Key words: transformer; insulation resistance; direct current resistance; chromatographic analysis; winding deformation
參考文獻
[1] Q/CSG 114002-2011 電力設備預防性試驗規程[S].
[2] 何平，文習山.變壓器繞組變形的頻率響應分析法綜述[J].高電壓技術，2006，32(5)：37-40.
[3] 劉利成，季克超，黃曙霞.變壓器出口短路的危害及預防措施[J].變壓器，2006，43(2)：24-25.
