开关柜内沿面放电及电弧放电多光谱特征分析  

Multi-spectral Characteristics of Creeping Discharge and Arc Discharge in Switch Cabinet

作　　者：彭兆裕 岳丹 颜冰 程志万 马御棠 何顺 任明 夏昌杰 PENG Zhaoyu;YUE Dan;YAN Bing;CHENG Zhiwan;MA Yutang;HE Shun;REN Ming;XIA Changjie(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;Kunming Power Supply Bureau of Yunnan Electric Power Grid Co.,Ltd.,Kunming 650200,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650217 [2]云南电网有限责任公司昆明供电局,云南昆明650200 [3]西安交通大学电气工程学院,陕西西安710049

出　　处：《绝缘材料》2021年第1期84-90,共7页Insulating Materials

基　　金：南方电网科技项目(YNKJXM20180015)。

摘　　要：在极端条件下,高压开关柜中的局部放电可发展为非贯穿或贯穿性电弧,导致严重绝缘失效。从放电的光辐射特性出发,提出了一种针对局部放电和异常电弧的光学检测方法,利用紫外光、可见光和红外光三波段光信号的同步监测,获得了沿面放电和电弧放电的多光谱光脉冲特性,并对比分析其平均光脉冲强度、三波段光强占比和放电重复率。结果表明:放电光信号幅值与外施电压存在良好的对应关系,三个波段的统计特征在低能放电和高能放电中表现出较大差异,可依据此特征制定低能放电和高能电弧放电的判别阈值,从而提高开关柜状态预警和主动保护的置信度。The partial discharge(PD)in high voltage switch cabinet might develop into non-penetrating or penetrating arc under extreme conditions,which can lead to insulation failure in severe case.From the optical radiation characteristics of discharge,an optical detection method for PD and abnormal arc was proposed.Multi-spectral characteristics of creeping discharge and arc discharge were obtained by the synchronous monitoring of ultraviolet,visible,and infrared optical signals,and the average intensity of light pulse,the light intensity ratio of three bands,and discharge repetition rate were analyzed and compared.The results show that there is a good corresponding relation between the amplitude of discharge light signal and the applied voltage.The statistical characteristics of three bands show large difference in low and high energy discharge,and according to the characteristic,the threshold value of low energy discharge and high energy arc discharge can be determined,thus the confidence of status warning and active protection of switch cabinet can be improved.

关 键 词：开关柜 局部放电 电弧放电 光测法 多光谱 

分 类 号：TM8[电气工程—高电压与绝缘技术]