基于局部密度聚类算法的变压器故障状态评估  

Transformer Fault State Evaluation Method Based on Multi-local Density Clustering Algorithm

作　　者：罗伟明 吴帆 黄业广 吴杰康[1] 覃炜梅 龚杰 金尚婷 LUO Weiming;WU Fan;HUANG Yeguang;WU Jiekang;QIN Weimei;GONG Jie;JIN Shangting(School of Automation,Guangdong University of Technology,Guangzhou,Guangdong 510006,China;Guangxi Boyang Electric Power Design Co.Ltd.,Nanning,Guangxi 530023,China;Nanning Power Supply Bureau,Guangxi Power Grid Corporation,Nanning,Guangxi 525000,China)

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]广西博阳电力勘察设计有限公司,广西南宁530023 [3]广西电网有限责任公司南宁供电局,广西南宁525000

出　　处：《广东电力》2018年第8期81-90,共10页Guangdong Electric Power

基　　金：国家自然科学基金项目(51567002;50767001);广东省公益研究与能力建设专项资金项目(2014A010106026);广东省应用型科技研发专项资金项目(2016B020244003)

摘　　要：为提高油浸式电力变压器故障状态评估的准确性,结合局部密度聚类(local density clustering,LDC)算法和三比值法提出一种变压器故障状态评估方法——以油中溶解气体为研究对象,对气体数据进行LDC处理,以最后聚类结果作为故障状态评估模型及结合三比值法对新数据进行故障评估。该方法在弥补聚类方法无法准确反映故障状态和三比值法编码不全、编码太片面等不足的同时,在变压器状态发生变化时能随着新数据的输入自主修正故障状态评估模型。不同实验结果表明该方法用在变压器故障评估中,具有较高的故障评估准确率,并且当出现未知故障时能有效修正所搭建故障状态评估模型,可以在一定程度上反映变压器故障状态,保证变压器正常、安全运行。To improve the accuracy of the oil-immersed power transformer fault state assessment. This paper proposes a transformer fault state evaluation method based on local density clustering algorithm and three-ratio method. This method can compensate for the failure of the clustering method to accurately reflect the fault state and the three-ratio method, the coding is too absolute, and the transformer state. When a change occurs, the fault state evaluation model can be corrected autonomously with the input of new data. The experimental results show that the proposed method has a high accuracy of fault assessment and can effectively correct the fault state assessment model when an unknown fault occurs. In this paper, the LDC clustering algorithm is used in transformer fault assessment to prove that the clustering result can reflect the transformer fault state to a certain extent, which provides a new idea for the application of unsupervised learning algorithm in transformer fault state assessment.

关 键 词：油中溶解气体 局部密度聚类算法 三比值法 归一化处理 变压器 故障评估 

分 类 号：TM41[电气工程—电器]