摘要
为了研究振荡冲击电压下局部放电现象,设计了振荡冲击波形发生器,根据等效电路模型,推导出波形参数表达式;制作了一款专门用于冲击电压下局部放电脉冲测量的高频电流传感器,研究了线圈匝数和积分电阻对其频率特性的影响,利用函数发生器和方波电压源测试校准了传感器实际动态响应;在此基础上建立了一套局部放电脉冲测量系统,并对针板电极实验模型在振荡冲击电压下的局部放电信号进行测量。试验结果表明,该测量系统能够有效抑制源干扰,提取局部放电脉冲,为进一步研究振荡冲击电压下局部放电特征和机理提供重要价值。
In order to study the partial discharge （PD） pulses under oscillatory impulse voltage （OIV）, an oscillation waveform generator is designed and the waveform parameter expressions are presented based on its equivalent circuit model. A high-frequency current transducer is developed for the measurement of PD. Then the effects of coil turns and integral resistance on frequency properties are studied. Moreover, calibration and analysis of the actual dynamic response are performed by adopting a function generator and a square-wave source. A PD measurement system that detects the PD signals of a needle-plate model under OIV was developed. Experiment shows that by adopting this PD measurement system, the source interferences are restrained and the PD signals are effectively extracted, therefore the proposed system could be a worthy approach not only to studying PD characteristics under OIV in depth, but also to exploring the mechanism behind it.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第1期188-193,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金项目(50977075)资助
关键词
振荡冲击电压
电流传感器
动态响应
局部放电测量
干扰
oscillatory impulse voltage
current transducer
dynamic response
partial discharge measurement
disturbance
