电力变压器运行状态的灰色层次评估模型  

A Hierarchical Grey Evaluation Model for Operation Condition of Power Transformers

作　　者：熊浩[1,2] 孙才新[1] 张昀[1] 谭志红[1] 代姚[1] 

机构地区：[1]重庆大学高电压与电工新技术教育部重点实验室 [2]重庆市电力公司超高压局,重庆市400039

出　　处：《电力系统自动化》2007年第7期55-60,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50425722)。

摘　　要：电力变压器运行状态评估是指导变压器状态检修及提高电力系统运行可靠性的重要手段。根据变压器状态信息的多层次性和多因素性,文中建立和量化了变压器状态评估的层次指标体系。引入了灰色层次评估法,分别建立变压器突变状态和渐变状态评估模型,利用关联层次分析确定变压器的具体状态。指标的权重先由灰色关联分析法确定常权权重,并对常权权重进行修正得到其变权权重,以提高状态评估的准确性。实例分析表明了变压器运行状态的灰色层次评估模型的合理性和有效性。Condition assessment of power transformers is an important approach to providing decision-making for condition maintenance and improving the operation reliability of power systems. The power transformer＇s operation condition is related to quite a few factors, part of which are vague, making its condition estimation a tough job. A hierarchical grey evaluation method is then introduced to assess the condition of the power transformer. Two models consisting of the abrupt-change condition assessment model and gradual-change condition assessment model are developed via a hierarchical grey relation analysis to evaluate the transformer＇s operating condition. The appropriate indices of condition assessment are selected and quantified in two models, respectively. Its variable weights are determined by modifying the constant weight obtained by grey relation analysis so as to improve the accuracy of condition assessment. The results of an example analysis indicate that the hierarchical grey evaluation method proposed is feasible and effective.

关 键 词：电力变压器 状态评估 灰色层次评估模型 灰色关联分析 变权 状态检修 

分 类 号：TM406[电气工程—电器]