基于层次分析和逼近理想解法的绝缘状态评估  

Evaluation of insulation state based on the combination of analytical hierarchy process and TOPSIS

作　　者：张宁[1,2] 蔡金锭 Zhang Ning;Cai Jinding(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350018,China;Fujian Smart Electrical Engineering Technology Research Center,Fuzhou 350018,China)

机构地区：[1]福州大学电气工程与自动化学院,福州350018 [2]福建省电器智能化工程技术研究中心,福州350018

出　　处：《仪器仪表学报》2018年第11期35-42,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61174117)项目资助

摘　　要：变压器油纸绝缘状态评估是一个具有多特征量的复杂问题,提出引入正、负参照点的改进层次分析-逼近理想解法(AHP-TOPSIS)绝缘状态评估模型。首先,应用回复电压(RVM)提取油纸绝缘状态的相关特征量,建立变压器油纸绝缘状态评估的层级结构;其次,应用层次分析法,以专家经验为指导依据确定特征量的权重系数;然后,分别将绝缘状态极为良好和老化极为严重的变压器作为正、负参照点和待评估变压器共同构造出决策矩阵,对决策矩阵进行规范化处理并与权重相结合,得到加权的规范化决策矩阵,并本文的正、负参照点分别为正、负理想解;最后,计算出变压器与正参照点的贴近度,根据贴近度划分的区间评估变压器的绝缘状态。应用算例证实了改进AHP-TOPSIS在变压器绝缘状态评估中的精确性,相比传统TOPSIS法能够更为准确进行变压器油纸绝缘状态评估。The insulation state evaluation of transformer oil paper is a complex problem with multiple features. In this paper, an improved analytical hierarchy process and technique for order preference by similarity to ideal solution(AHP-TOPSIS) method of insulation state evaluation model with positive and negative reference points is proposed. First, the response voltage method(RVM) is utilized to extract the related features of the insulation state of oil paper. The hierarchical structure of the insulation state evaluation of the transformer oil paper is formulated. Secondly, the analytic hierarchy process is applied to determine the weight coefficients based on the characteristic quantity of the expert experience. Then, the state is divided into the fine insulation and the serious aging degradation. These two factors are adopted as references to assess the transformer. In this way, a decision matrix can be constructed, which is normalized and combined with the weight. The positive and negative reference points of this paper are positive and negative ideal solutions. Finally, the close degree of the transformer and the positive reference point are calculated. The insulation state of transformer is evaluated according to the interval of proximity. The application example proves the accuracy of the improved AHP-TOPSIS method in the insulation state evaluation of the transformer. Compared with the traditional TOPSIS method, the insulation state of the transformer oil paper can be evaluated more accurately.

关 键 词：油纸绝缘 回复电压 特征量 层次分析 逼近理想解法 

分 类 号：TH183[机械工程—机械制造及自动化] TM411[电气工程—电器]