基于超声导波的盆式绝缘子缺陷检测及定位  

Detection and Location for Defects of Basin-type Insulator Based on Ultrasonic Guided Wave

作　　者：马君鹏[1] 孙兴涛 李硕[2] 吕福在[2] 唐志峰[3] 岳贤强 MA Junpeng;SUN Xingtao;LI Shuo;LÜFuzai;TANG Zhifeng;YUE Xianqiang(Jiangsu Fang Tian Electric Power Technology Company Limited,Nanjing 211102,China;State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China;Institute of Advanced Digital Technologies and Instrumentation,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]江苏方天电力技术有限公司,南京211102 [2]浙江大学流体动力与机电系统国家重点实验室,杭州310027 [3]浙江大学数字技术与仪器研究所,杭州310027

出　　处：《高电压技术》2019年第12期3941-3948,共8页High Voltage Engineering

摘　　要：盆式绝缘子作为气体绝缘封闭组合开关设备(GIS)的重要部件,其结构健康对电网的建设有着重要影响。为降低GIS故障率,首先分析了盆式绝缘子的损伤原因,对比了针对其缺陷常用的检测方法,提出了利用超声导波技术对盆式绝缘子的内部气泡、外部附着物及裂纹等缺陷进行检测及定位的方法。并进一步分析了兰姆(Lamb)波在盆式绝缘子中的传播特性,绘制出频散曲线,确定了激励信号的频率,同时通过有限元仿真和检测试验对盆式绝缘子缺陷的检测和定位进行了研究。研究结果表明,采用谐振频率为100 kHz的压电传感器在盆式绝缘子中激发出Lamb波,并通过压电传感器阵列进行接收。通过比较不同传感器接收信号幅值的衰减率,可以对盆式绝缘子的缺陷进行检测和定位。As an important component of switchgear(GIS),the structural health of basin-type insulator has an important impact on the construction of power grid.In order to reduce the failure rate of GIS,the damage causes of basin-type insulator are analyzed,and the common detection methods for its defects are compared.The ultrasonic guided wave technology is used to detect and locate the internal bubbles,external attachments and cracks of basin-type insulator.Moreover,the propagation characteristics of Lamb wave in basin-type insulator are analyzed.The dispersion curve is drawn,and the frequency of excitation signal is determined.Meanwhile,the detection and location for defects of basin-type insulator are studied by finite element simulation and detection tests.The results show that the Lamb wave is excited by the piezoelectric probe with a resonant frequency of 100 kHz in the basin-type insulator,and it is received by the piezoelectric probe array.By comparing the attenuation rate of the signal amplitude received by different probes,the defects of the basin-type insulator can be detected and located.

关 键 词：盆式绝缘子 超声导波 LAMB波 压电传感器 缺陷检测 缺陷定位 

分 类 号：TM2[一般工业技术—材料科学与工程]