摘要
传统的气体绝缘组合电器(gas insulated switchgear,GIS)在线监测装置无法排除外部局部放电的干扰,为解决这一问题,提出一种基于多传感器联合诊断的GIS外部局部放电抗干扰技术。首先,对比外部局部放电与内部局部放电信号谱图特征的区别,指出特高频信号的传输衰减特性是导致谱图特征区别的原因。然后,提出一种识别外部局部放电信号的算法,通过比较接收到局部放电的传感器与其近邻的多个传感器接收到的局部放电信号谱图相似性,判断该局部放电信号是否来自GIS外部。现场实验和案例分析结果表明,该算法可有效识别GIS外部局部放电,排除外部局部放电带来的误报警情况。
In order to solve the problem that the traditional GIS on-line partial discharge(PD)monitoring device can t eliminate the interference of external PD,this paper proposes a technology for diagnosing GIS external PD interference based on multi-sensor joint diagnosis.It firstly compares differences between the pattern features of internal and external PD signals and points out the reason is the transmission attenuation of UHF signals.Afterwards,it proposes an algorithm of identifying the external PD signals,which can tell whether the PD is from the outside GIS by comparing the similarity of PD spectrogram of the sensor receiving PD signals and its neighbour sensors.Lab experiments and field cases show that this algorithm can effectively identify external PD to remove false alarms caused by external PD signals.
作者
罗颖婷
王磊
许海林
田翔
江俊飞
LUO Yingting;WANG Lei;XU Hailin;TIAN Xiang;JIANG Junfei(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou,Guangdong 510080,China)
出处
《广东电力》
2022年第6期107-115,共9页
Guangdong Electric Power
基金
中国南方电网有限责任公司科技项目“基于智能AI技术的GIS局部放电监测与诊断技术研究”(GDKJXM20199427)。
