采用最大特征值筛选的配电变压器状态评估实用方法  

Distribution Transformer Condition Assessment Methods Using Maximum Eigenvalue Selection

作　　者：阳东升 刘子兴[2] 张静[2] 徐洋[2] 刘建鹏[2] 林呈辉 梁海峰[2] 

机构地区：[1]贵州省电力试验研究院,贵阳550002 [2]华北电力大学电力工程系,保定071003

出　　处：《电力与能源》2014年第3期271-274,278,共5页Power & Energy

摘　　要：针对配电变压器状态量数据较少,开展状态评估工作困难的情况,提出了一种基于最大特征值筛选的配电变压器状态评估方法。利用最大特征值法分析影响配电变压器的各状态量,得到评估配电变压器的核心状态量集合。在利用核心状态量进行状态评估得到初始评估结果的基础上,通过求取非核心状态量的灵敏度,修正初始评估结果,从而得到配电变压器状态评估的最终结果。通过对油浸式配电变压器评估实例的结果分析表明:所提方法仅需要考虑核心状态量和有变化的非核心状态量,既减少了对数据的需求,又保证了评估结果的准确性,是有效和实用的。According to the problems that there are less distribution transformer state variables and the condi-tion assessment of distribution transformer carry out difficultly,a method of distribution transformer condition assessment based on maximum Eigen-value selection is presented.Through analyzing the principle of every state variables of distribution transformer by use of the maximum Eigen-value approach,the core state collec-tion of assessing the distribution transformer is formed and the state variables dimensionality is reducing.The initial results of distribution transformer condition assessment are obtained by using core state variables.Then through calculating the sensitivity of the non-core state variables to the evaluation results,the initial assess-ment results are modified to ensure more accurate results.A condition assessment instance of distribution transformer shows that this method not only reduces the demand for data,but also ensures accuracy of the re-sults using the sensitivity correction.The results verify the validity of the method.

关 键 词：配电变压器 状态评估 最大特征值 核心状态量 灵敏度 

分 类 号：TM732[电气工程—电力系统及自动化]