摘要
在实际应用中,电磁干扰成为影响局部放电检测准确性和可靠性的重要因素。因此,考虑电磁干扰抑制的架空线路绝缘子局部放电声电联合定位技术应运而生。通过特高频传感器获取特高频电磁波信号并利用小波阈值法对低电磁干扰抑制,提高信号质量。提取特高频电磁波信号中的能量特征并通过SVM确定局部放电源的大致范围位置。通过在疑似发生放电的腔体外壁上安装超声波传感器,进一步确定局部放电源的精确位置。结果表明,所研究方法应用下,定位出3种架空线路绝缘子的局部放电点分别距离超声波传感器12.497 cm、18.459 cm、8.435 cm位置处,且联合定位方法的定位误差相对较小且稳定。
In practical applications,electromagnetic interference has become an important factor affecting the accuracy and reliability of partial discharge detection.Therefore,the acoustic electric joint positioning technology for partial discharge of overhead line insulators considering electromagnetic interference suppression has emerged.Obtaining ultra-high frequency electromagnetic wave signals through ultra-high frequency sensors and using wavelet thresholding to suppress low electromagnetic interference to improve signal quality.Extract energy features from ultra-high frequency electromagnetic wave signals and determine the approximate range and location of local discharge sources through SVM.By installing ultrasonic sensors on the outer wall of the suspected discharge chamber,the precise location of the local discharge source can be further determined.The results showed that under the application of the research method,the partial discharge points of three types of overhead line insulators were located at distances of 12.497 cm,18.459 cm,and 8.435 cm from the ultrasonic sensor,respectively.The positioning error of the joint positioning method was relatively small and stable.
作者
张泽
徐兴春
朱岩泉
闻丹银
ZHANG Ze;XU Xingchun;ZHU Yanquan;WEN Danyin(Taizhou Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Taizhou 225300,China)
出处
《自动化与仪表》
2025年第7期102-106,共5页
Automation & Instrumentation
关键词
电磁干扰抑制
特高频传感器
架空线路绝缘子
局部放电
声电联合
electromagnetic interference suppression
ultra high frequency sensor
insulators for overhead power lines
partial discharge
acoustic and electrical union
