Impact of time parameters of lightning impulse on the breakdown characteristics of oil paper insulation  

作　　者：Wenxia Sima Potao Sun Ming Yang Jingyu Wu Jiefang Hua 

机构地区：[1]State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing 400030,People’s Republic of China

出　　处：《High Voltage》2016年第1期18-24,共7页高电压（英文）

基　　金：the National Basic Research Program(973 Program)(2015CB251003);the Funds for Innovative Research Groups of China(51321063).

摘　　要：At present,the insulation performances of electrical apparatus under lightning impulse voltages are always evaluated by the withstand test of standard lightning impulse voltage(1.2/50μs),which is recommended by IEC Standard.However,the actual time parameters of transformer invading lightning impulse voltage present an obvious dispersibility characteristics.The standard wave shape is only representative of one particular class of lightning waves,which is far from satisfactory to act as the guidance waveform in the design of power equipment insulation.On the basis of the above research background,the relationship between breakdown characteristics of oil paper insulation and time parameters of applied lightning impulse voltage was investigated in this study.The 50%breakdown voltage characteristics of oil paper insulation under lightning impulse voltage with different time parameters were determined.The test results indicate that a short wave front time could lead to relatively low 50%breakdown voltage,while when the wave tail time varied,the 50%breakdown voltage of oil paper insulation barely changed.At last the simulation model of oil paper insulation was developed,and the current flowing through the oil paper insulating system under lightning impulse voltage was calculated.On the basis of the simulating results,the relationship between current and time parameters was analysed.

关 键 词：LIGHTNING INSULATION BREAKDOWN 

分 类 号：F42[经济管理—产业经济]