摘要
空间电荷是影响高压直流电缆绝缘性能的关键因素之一。提出一种基于脉冲电声法的电缆空间电荷测量技术,通过优化脉冲激励参数、传感器设计以及信号处理算法,实现了电缆绝缘层中空间电荷分布的高精度、高分辨率测量。实验结果表明,该技术的空间分辨率为9.5μm,电荷密度分辨率为±0.1 C·m^(-3),信噪比为82.5 dB,完全满足电缆空间电荷测量的实际需求。
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 9.5μm,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 chargemeasurement.
作者
杨健
YANG Jian(Jiangsu Province Qidong Technical Secondary School,Qidong 226200,China)
出处
《电声技术》
2024年第9期180-182,共3页
Audio Engineering
关键词
高压直流电缆
空间电荷
脉冲电声法
high voltage direct current cable
space charge
pulse electroacoustic method
