基于传递函数法的变压器感应式振荡操作冲击电压试验故障诊断技术研究  

Research on Fault Diagnosis Technology of Transformer Inducting Oscillating Switching Impulse Voltage Test Based on Transfer Function Method

作　　者：孙文星 林春耀 蔡玲珑 马志钦 欧阳旭东 李冲 SUN Wenxing;LIN Chunyao;CAI Linglong;MA Zhiqin;OUYANG Xudong;LI Chong(Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Guangdong Key Laboratory of Electric Power Equipment Reliability,Guangzhou 510080,China;Huizhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangdong Huizhou 516001,China)

机构地区：[1]广东电网有限责任公司,广州510000 [2]广东电网有限责任公司电力科学研究院,广州510080 [3]广东省电力装备可靠性企业重点实验室,广州510080 [4]广东电网有限责任公司惠州供电局,广东惠州516001

出　　处：《高压电器》2020年第6期243-248,共6页High Voltage Apparatus

基　　金：中国南方电网有限责任公司科技项目(GDKJXM20172901)。

摘　　要：采用感应式振荡型操作冲击电压对变压器进行现场冲击耐压试验具有效率高、易于调波、试验设备体积小等优点。为了研究变压器匝间短路故障在感应式振荡操作冲击电压下的电压传递函数特性,构建了感应式振荡操作冲击电压下变压器的电压传递函数,建立了模拟变压器匝间短路的试验模型,并以该模型为试验对象搭建试验系统进行试验。通过分析试验数据后发现,存在匝间短路故障的变压器在感应式振荡操作冲击电压作用下,其电压传递函数与无故障时相比,极值点所在的频率升高,极值点的幅值降低。短路故障越严重,极值点的变化趋势越明显。文中总结的感应式振荡操作冲击电压作用下变压器电压传递函数的变化规律有助于在现场对变压器进行感应式振荡操作冲击耐压试验并检测其绝缘缺陷。The inducting oscillating switching impulse(OSI)test for on⁃site impulse withstand voltage test of trans⁃former has advantages in efficiency,modulating wave and decreasing the size of equipment.In order to investigate the characteristics of the voltage transfer function of a transformer with a inter⁃turn short⁃circuit fault under Inducting oscillating switching impulse,this paper constructed the voltage transfer function of transformer under oscillating switching impulse,built a test model to simulate inter⁃turn short⁃circuit faults in transformer,and constructed a test system to carry on tests on the model.The results show that compared with no fault,the voltage transfer function of a transformer with a inter⁃turn short⁃circuit fault under OSI the frequency increases and the amplitude decreases of at the extreme point.Besides,the more serious the inter⁃turn short⁃circuit fault is,the more obvious the change of the ex⁃treme point is.How the extreme point of the voltage transfer function of a transformer with a inter⁃turn short⁃circuit fault under OSI changes which is concluded in this paper will help in transformer OSI test and insulation defect detecting.

关 键 词：变压器 匝间短路 感应式振荡操作冲击 传递函数 

分 类 号：TM407[电气工程—电器]