摘要
特高频检测技术作为一种有效的局部放电检测技术,目前已在组合电器(GIS)检测中广泛应用。在带电检测过程中检测到一处252 k V GIS盆式绝缘子有特高频异常信号。对盆式绝缘子进行X光探伤检测,发现内部存在数厘米长度气孔,该结果与特高频法检测及定位结论相一致。对该盆式绝缘子进行工频耐压试验及脉冲电流法局部放电试验,却均满足出厂试验的要求,说明厂内传统的检测方法有其一定的局限性。针对这个情况,提出了增设盆式绝缘子出厂前特高频局部放电检测等建议,从而进一步提高盆式绝缘子的出厂质量。
As an effective partial discharge detection technology,UHF detection technology has been widely used in GIS detection.In the live detection process,the UHF abnormal signal is detected on a252kV GIS basin-type insulator.An X-ray detection was performed to the basin-type insulator,and several centimeters long pores are found inside.The results are consistent with the detection and positing of UHF method.However,the power frequency withstand voltage test and partial discharge test by pulsed current method to the basin-type insulator can meet the requirement of the factory test,indicating that the traditional detection method has its own limitations.In view of this situation,some suggestions are put forward,such as the extra high frequency partial discharge detection of basin-type insulators before leaving the factory,so as to improve the outgoing quality of the basin-type insulators.
作者
施景垒
宋云翔
杨景刚
王晨
肖雷
SHI Jinglei;SONG Yunxiang;YANG Jinggang;WANG Chen;XIAO Lei(State Grid Jiangsu Electric Power Company Research Institute, Nanjing 211103, China;NARI Technology Development Limited Company, Nanjing 211106, China)
出处
《电力工程技术》
2017年第6期127-131,共5页
Electric Power Engineering Technology
基金
国网江苏省电力公司科技项目(5210EC14006Z)
