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随着电力工业迅速发展,电网容量的增大,越来越多的高压电力设备采用在线诊断和检测技术确保安全可靠运行,同时可以降低维修费用。根据对局部放电信号的检测可以预测绝缘寿命,判断多种故障,从而有效地发现设备内部存在的早期绝缘缺陷。研究发现,局部放电发生时,除放电现象以外还伴随有许多非电的复杂物理、化学现象,其中超声波信号可以
With the rapid development of power industry and the increase of power grid capacity, more and more high-voltage power equipment adopts on-line diagnosis and detection technology to ensure safe and reliable operation and reduce maintenance costs. Based on the partial discharge signal detection can predict the insulation life, to determine a variety of faults, which effectively found the existence of the early internal insulation defects. The study found that partial discharge occurs, in addition to the discharge phenomenon is accompanied by many non-electrical complex physical and chemical phenomena, in which the ultrasonic signal can