低压电抗法在变压器低压绕组变形诊断中的应用  

Application of Low Voltage Reactance Method in Diagnosis of Low Voltage Winding Deformation of Transformer

作　　者：范旭华[1] 黄耀德[1] 石海珍[1] 张淑珍[2] 

机构地区：[1]新疆电力科学研究院,新疆乌鲁木齐830000 [2]国网武汉高压研究院,湖北省武汉市430074

出　　处：《电力设备》2007年第3期35-37,共3页Electrical Equipment

摘　　要：低压电抗法在诊断变压器低压绕组变形中具有现实意义;通过4台110kV变压器现场测试、返厂解体验证的实例,提出了低压电抗法辅助频响法能提高诊断变压器低压绕组变形的准确率,以及当三相电抗横向比较出现最大互差约为2%时,不宜套用国标纵向电抗值变化不大于2%的要求的观点。The diagnosis of transformer winding deformation using low voltage reactance method and its realization method were introduced briefly. Through the examples of on - the - spot tests and the disintegration verification returning to factory for 4 110 kV transformers, it is pointed out that using low voltage reactance method and frequency response method can improve the accuracy rate of the deformation diagnosis of transformer winding of low voltage, and when the maximum error of lateral comparison for three - phase reactance is more than 2%, the requirement of 2% for longitudinal reactance value in national standard is not suitable.

关 键 词：变压器 绕组变形 诊断 电抗法 

分 类 号：TM407[电气工程—电器]