摘要
在进行雷电冲击试验时,需对冲击电压发生器的调波电阻(波前电阻Rf、半峰值电阻Rt)进行调节,使冲击波形符合标准IEC60060-1的要求:波前时间tf为1.2μs(±30%),半峰值时间tt为50μs(±20%)。针对快速确定冲击电压发生器调波电阻的问题,对冲击电压发生器放电等值回路进行了数学分析,建立了关于Rf、Rt的非线性方程组,并采用混合遗传算法进行了求解。得到Rf、Rt的数值计算解后,在Matlab环境下对雷电冲击放电回路进行了仿真分析。最终,在高压试验大厅进行了现场试验加以验证。研究结果表明,所采用的调波电阻确定方法能够保证冲击波形符合标准要求,缩短设备调试时间,可为现场试验人员提供理论指导。
In the lightning impulse test,the wave resistance （front resistance denoted by Rf and time to half-value resistance denoted by Rt） of impulse voltage generator should be adjusted in order to make the impulse waveform comply with the standard of IEC 60060-1：the standard waveform should have a front time denoted by tf of 1.2 μs with the tolerance is ± 30％ and a time to half-value denoted by tt of 50 μs with the tolerance is ± 20％.Aiming at determining the wave resistance of impulse voltage generator quickly,the equivalent discharging circuit of the impulse voltage generator was analyzed mathematically,then non-linear equations for solving Rf and Rt were established and solved by hybrid genetic algorithm.After obtaining the numerical solution of Rf and Rt,the discharge circuit was simulated and analyzed by using Matlab.Finally,the field test was carried out in the high voltage test hall to verify the simulation results.The results indicate that the method to determine the wave resistance is effective,and can provide theoretical guidance for field test personnel to reduce the equipment debugging time.
出处
《机电工程》
CAS
2014年第3期388-392,共5页
Journal of Mechanical & Electrical Engineering
关键词
雷电冲击试验
冲击电压发生器
波前电阻
半峰值电阻
混合遗传算法
lightning impulse test
impulse voltage generator
front resistance
time to half-value resistance
hybrid genetic algorithm
