摘要
针对电力系统中波前时间比标准雷电波(1.2μs)还要短的冲击过电压测量问题,以及为了提高试验标定冲击分压器时输出信号的信噪比,提出了电容放电型方波发生器的电路原理,以上升时间<5ns的气体间隙作为陡化开关,研制了上升时间为ns级的高压方波发生器。初步试验结果表明,陡化开关满足设计要求,重复性好,但波形受回路杂散参数的影响较大。在考虑杂散参数影响的条件下,通过ATP仿真分析了回路主要参数对输出波形的影响规律并确定了各参数的取值,改进后的试验回路能得到上升时间<5ns、脉宽>1μs、幅值约10kV的方波电压。该方波发生器可作为标定冲击分压器的方波源。
For the measurement of very fast transient overvohage which has short rise time and high amplitude in the power system, we proposed a circuit of high voltage capacitor discharging type square wave generator （SWG）. A SWG with rise time of only 5 ns was developed according to the theoretical experimental studies. The rise time of output voltage generated by capacitor discharging was further shortened by a steep switch. The primary experiment shows that the steep switch satisfies the design requirements with a good consistency. COnsidering the influence of stray parameters on output waveform, the main component parameters were analyzed in ATP simulation. Based on the results, the parameters of main component were improved and the improved circuit can obtain an output voltage wave of which rise time is less than 5 ns, width is larger than 1 p^s and have an amplitude of 10 kV. The generator is sufficient to be the square wave source for the measurement.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第5期1093-1098,共6页
High Voltage Engineering
基金
国家自然科学基金(50437020)~~
关键词
高压方波发生器
电容放电
陡化开关
上升时间
杂散参数
ATP仿真
high voltage square wave generator
capacitor discharging
steeping switch
rise time
stray parameters
ATP simulation
