电力变压器状态评估的加权灰靶心度分析法

针对电力变压器状态评估采用极大值极性不能正确评估正常运行状态的问题，提出一种采用加权灰靶心度算法根据电力变压器油中溶解气体含量数据以正常运行状态为标准模式的电力变压器状态评估方法。在对电力变压器状态按程度分级统计资料的基础上，提出了5级分级策略；根据电力变压器故障标准谱采用灰贡献度分析法研究确定了电力变压器油中溶解气体的权重；依据电力变压器油中溶解气体之间此消彼长的关系，提出了以正常状态为标准模式的电力变压器状态评估的加权灰靶心度分析方法，克服了采用极大值极性不能评估正常状态的问题。实验表明，该方法更符合电力变压器状态评估的实际情况，是一种科学有效的评估方法。

Weighted Grey Target Analysis for Power Transformer Condition Assessment

when power transformer condition assessment uses maximum polarity for grey target a- nalysis, the assessment of normal condition may be incorrect. According to the exist problem, in this paper we utilize the normal conditon of power transformer as the standard mode for the grey target analysis. The algorithm proposed in this paper puts forward a five - degree suggestion for power transformer condition classification according to the statistic of plenty of power transformers. In the algorithm we use the standard power transformer fault data to analysize and determine the weight for each gas. Because the containts of gases shift during a fault process, we utilize the normal condition of power transformer as the standard mode, which solves the problem of incorrect assessment for normal condition. Experiments demonstrate that the algorithm is a effictive way to assess power transformer condition because it meets the actual condition better.