CAJ | 학술논문

　　针对2011年6月3日，因用户侧35 kV开关柜发生三相短路，导致石嘴山供电局220 kV步桥变电站4号主变压器差动保护和重瓦斯保护相继动作，主变压器三侧开关切除的故障，对绝缘油色谱、绕组直流电阻、电压比、频响法绕组变形及低压短路阻抗测试结果进行综合分析。结果表明：该变压器内部发生了严重的放电性故障，中、低压侧绕组均发生了变形和匝间短路，且低压绕组三相绕组出现了严重的断股。
　　침대2011년6월3일，인용호측35 kV개관거발생삼상단로，도치석취산공전국220 kV보교변전참4호주변압기차동보호화중와사보호상계동작，주변압기삼측개관절제적고장，대절연유색보、요조직류전조、전압비、빈향법요조변형급저압단로조항측시결과진행종합분석。결과표명：해변압기내부발생료엄중적방전성고장，중、저압측요조균발생료변형화잡간단로，차저압요조삼상요조출현료엄중적단고。
On June 3, 2011, three-phase short circuit happened on customers side 35 kV switch cabi-net, resulted in the faults that No.4 main transformer differential protection and heavy gas protection successively take action, in Buqiao 220 kV substation of Shizuishan Electric Power Supply Bureau. The comprehensive analysis based on test results of insulating oil chromatogram, winding direct current re-sistance, voltage ratio, winding distortion and low voltage short circuit reactance. The result shows that the interior of transformer occur serious discharge fault, middle and low voltage sides windings appear distortion and interturn short circuit, low voltage three-phase winding appear serious broken strand.