基于优化TQWT及孪生SVM的有载分接开关机械故障诊断  

Mechanical Condition Identification of On⁃load Tap⁃changer Based on Optimized TQWT and Twin SVM

作　　者：余长厅 黎大健 陈梁远 张磊[2] 赵坚 YU Changting;LI Dajian;CHEN Liangyuan;ZHANG Lei;ZHAO Jian(Electric Power Research Institute,Guangxi Power Grid Corporation,Nanning 530023,China;Key Laboratory of Control of Power Transmission and Conversion,Shanghai Jiao Tong University,Ministry of Education,Shanghai 200240,China)

机构地区：[1]广西电网有限责任公司电力科学研究院,南宁530023 [2]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240

出　　处：《高压电器》2024年第10期110-118,共9页High Voltage Apparatus

基　　金：国家广西电网公司科技项目资助(GXKJXM20190748)。

摘　　要：为进一步提高有载分接开关(on-load tap changer,OLTC)机械状态监测的准确性,文中基于优化品质因数可调小波变换(tunable quality wavelet transform,TQWT)对OLTC切换过程中的振动信号进行了分析。即使用人工鱼群算法(artificial fish swarm algorithm,AFSA)基于分解余量与整体正交系数研究了TQWT的优化分解方法,计算得到了OLTC振动信号的多个子序列,构建了基于优化孪生支持向量机(twin support vector machine,TWSVM)的OLTC机械故障诊断模型。对某CM型OLTC正常与典型机械故障下振动信号的分析结果表明,所提优化TQWT分解方法有效提高了OLTC振动信号分解结果的准确性。相对于其他诊断模型,所构建AFSA-TWSVM的OLTC机械故障诊断模型分类效果好且收敛速度更快。For improving the accuracy of mechanical condition monitoring of on⁃load tap⁃changer(OLTC)further,the vibration signal of the OLTC during the switching period is analyzed on the basis of the optimized tunable Q⁃factor wavelet transform(TQWT)method.The optimization decomposition method of the TQWT is studied by using the arti⁃ficial fish swarm algorithm and AFAS(based on decomposition residue and global orthogonal coefficients),and the mechanical fault diagnosis model of OLTC is constructed based on the optimized twin support vector machine(TWS⁃VM)and in accordance with multiple multiple subsequences of the OLTC vibration signals which is obtained by cal⁃culation.The analysis results from vibration signals of a CM⁃type OLTC under normal and typical mechanical faults show that the proposed optimized TQWT decomposition method can effectively improve the accuracy of decomposing vibration signals of OLTC.The mechanical fault diagnosis mode of OLTC with AFSA⁃TWSVM,compared to other di⁃agnosis models,has better classification performance and fast convergence speed.

关 键 词：有载分接开关 机械故障 振动信号 品质因数可调小波变换 人工鱼群算法 孪生支持向量机 

分 类 号：TM403.4[电气工程—电器] TP18[自动化与计算机技术—控制理论与控制工程]