基于可听声的GIL设备交流耐压击穿放电定位研究  

Study on AC Withstand Voltage Breakdown Discharge Location of GIL Equipment Based on Audible-signal

作　　者：刘通 腾云 杨景刚 马勇 赵科 夏峰 袁国刚 LIU Tong;TENG Yun;YANG Jinggang;MA Yong;ZHAO Ke;XIA Feng;YUAN Guogang(State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing,211103,China;State Grid Jiangsu Electric Power Co.,Ltd.Maintenance Branch,Nanjing 211100,China;Shanghai Rhythm Electronic Technology Co.,Ltd.,Shanghai 201108,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,南京211103 [2]国网江苏省电力有限公司检修分公司,南京211100 [3]上海睿深电子科技有限公司,上海201108

出　　处：《高压电器》2021年第1期26-32,40,共8页High Voltage Apparatus

基　　金：国家江苏省电力有限公司2018年科技项目(GIL管廊运行状态监测及缺陷定位技术研究)。

摘　　要：为对GIL设备耐压试验时击穿放电点进行准确定位,文中选取110 kV GIS上的一段母线气室,模拟GIL设备开展基于可听声的GIL设备交流耐压击穿放电定位研究,针对GIL设备击穿性放电时可听声信号中的背景噪声,首先综合基于完备总体平均经验模态分解(complete ensemble empirical mode decomposition with adaptive noise,CEEMDAN)和小波阈值算法研究了声信号的去噪方法,并将声音信号中的背景噪声进行去除,然后采用时差法以直达声上升沿为标定时刻进行时延估计,实现放电点的空间定位。测试分析结果表明:所提出的去噪方法能有效抑制GIL击穿性放电时声信号中的噪声干扰,基于可听声的定位方法成功地确定了放电点,定位误差控制在15 cm之内,较好地满足了工程需求。For accurately locating breakdown discharge point of GIL equipment in withstand voltage test,in this paper,a section of busbar compartment on 110 kV GIS is selected to simulate GIL equipment and perform the study on AC withstand voltage breakdown discharge location of GIL equipment based on audible signal.In view of the back-ground noise in the audible signal in case of breakdown discharge of GIL equipment,the denoising method of the acoustic signal is firstly studied with the combination of complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)and the wavelet threshold algorithm,the background noise in the acoustic signal is removed,then the time difference method is used and the direct acoustic start edge is taken as the calibration time to estimate the time delay to achieve the space location of discharge point.It is shown by the test and analysis result that the proposed de-noising method can suppress effectively the noise interference of acoustic signal in the breakdown discharge of GIL,and the location method based on audible signal determines the discharge point successfully with location error within 15 cm and can meet the engineering requirements.

关 键 词：GIL 击穿性放电 可听声 CEEMDAN 时差法 空间定位 

分 类 号：TM75[电气工程—电力系统及自动化]