220kV支柱瓷绝缘子元件间连接螺栓松动对振动检测影响的仿真与实验  

Simulation and Experiment of the Influence of Loose Connecting Bolts Between Two Elements of 220 kV Post Porcelain Insulator on Vibration Detection

作　　者：张燕珂[1] 张松洋 万书亭[2] ZHANG Yanke;ZHANG Songyang;WAN Shuting(College of Electronic Information,Zhejiang Business Technology Institute,Ningbo 315012,China;Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention,North China Electric Power University,Baoding 071003,China)

机构地区：[1]浙江工商职业技术学院电子信息学院,浙江宁波315012 [2]华北电力大学河北省电力机械装备健康维护与失效预防重点实验室,河北保定071003

出　　处：《电瓷避雷器》2024年第3期148-156,共9页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:52275109);河北省自然科学基金(编号:E2022502007);保定市科技计划基础研究专项基金(编号:2172P010)。

摘　　要：根据变电站220 kV支柱瓷绝缘子在实际运行中出现的问题,以两节型号为ZSW-110/10的支柱瓷绝缘子串联组成的220 kV支柱瓷绝缘子为研究对象,深入研究了两元件支柱瓷绝缘子的连接螺栓松动对其振动检测结果的影响。首先建立两元件支柱瓷绝缘子的有限元数值分析模型,利用脉冲信号模拟锤击进行瞬态分析,分别获得了连接螺栓松动与否条件下正常绝缘子、绝缘子下元件故障、上元件故障时拾振点的加速度及其功率谱。然后搭建220 kV支柱瓷绝缘子实验台,完成了故障模拟与实验。理论分析与实测结果表明:对于正常和下元件故障支柱瓷绝缘子,连接螺栓松动将导致振动响应频谱谐波增多,但不会影响绝缘子主体的振动检测结果;但对于上元件故障绝缘子,低频段和中频段振动响应幅值较大,与高频段幅值较为接近,将在一定程度上影响支柱瓷绝缘子主体的振动检测结果。According to the problems of loose connecting bolts between the two elements of post porcelain insulators in 220 kV substation,the influence on the vibration detection with the ZSW-110/10 series connection model is studied in depth.Firstly,the finite element numerical analysis model of the two-element post porcelain insulator is established,and the transient analysis is carried out by pulse signal stimulation.When the insulator is normal,lower element fault,and upper element fault,the acceleration and power spectrum of the pickup point of the insulator are obtained respectively before and after bolt loosening between the two-element post porcelain insulators.Then,a 220 kV post porcelain insulator test bench is built to complete the fault simulation and experiment.The theoretical analysis and measured results are analyzed,for the normal and lower element fault insulator,the loosening of the connecting bolts will lead to the increase of vibration response spectrum harmonics,but will not affect the vibration detection results of the insulator body.However,for the upper element fault insulator,the amplitude of vibration response in the low and middle-frequency bands is larger,which is close to the amplitude of the high-frequency band,which will affect the vibration detection results of the main body of the post porcelain insulator to a certain extent.

关 键 词：支柱瓷绝缘子 振动检测 连接螺栓松动 故障诊断 

分 类 号：TM216[一般工业技术—材料科学与工程]