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高压电器  2015 

基于物元分析法的电力变压器套管健康状态评估

DOI: 10.13296/j.1001-1609.hva.2015.07.034, PP. 177-184

Keywords: 套管,健康状态,物元分析法,区间,评估

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Abstract:

套管故障率往往高于变压器本体,准确评估套管健康状态对提高变压器整体运行可靠性十分重要。文中基于物元分析理论提出了套管健康状态的评估方法。以试验检测数据为基础,综合考虑巡视检查与维护历史状态参量,构建了套管健康状态评估的层次型指标体系;采用层次分析法(AHP法)确定指标初始权重,并根据指标数据变化量、利用信息熵对试验类指标的初始权重进行修正。基于物元理论构建了套管健康状态的评估物元,考虑到定量指标测量干扰及定性指标主观判断所带来的误差,采用一个数据区间来表征指标状态,在此基础上基于区间可拓理论提出了套管健康状态的评估模型。实例分析表明文中建立的评估模型可以有效评估套管的健康状态,为制定套管后续维护检测策略提供参考。

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