Space charge is one of the key factors affecting the insulation performance of high-voltage direct current cables. A cable space charge measurement technology based on pulse electro acoustic method is proposed,which achieves high-precision and high-resolution measurement of space charge distribution in cable insulation layer by optimizing pulse excitation parameters,sensor design,and signal processing algorithms. The experimental results show that the spatial resolution of this technology is 9.5 μm,the charge density resolution is±0.1 C·m-3,and the signal-to-noise ratio is 82.5 dB,which fully meets the practical needs of cable space charge measurement.
关键词
高压直流电缆/空间电荷/脉冲电声法
Key words
high voltage direct current cable/space charge/pulse electroacoustic method
维普
万方数据