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第 39 卷第 10 期 煤 炭 学 报 Vol． 39 No． 102014 年 10 月JOUＲNAL OF CHINA COAL SOCIETY Oct． 2014刘晓明，牟龙华，张 鑫． 基于信息融合的隔爆开关永磁机构储能电容失效诊断［J］． 煤炭学报，2014，39(10):2121 － 2127． doi:10． 13225/j． cnki． jccs．2013．1279Liu Xiaoming，Mu Longhua，Zhang Xin． Failure diagnosis for storage-capacitor in permanent magnetic actuator of flameproof switchgearbased on information fusion［J］． Journal of China Coal Society，2014，39(10):2121 －2127． doi:10． 13225/j． cnki． jccs． 2013． 1279基于信息融合的隔爆开关永磁机构储能电容失效诊断刘晓明，牟龙华，张 鑫(同济大学 电气工程系，上海 201804)摘 要:针对利用单一判据对隔爆开关永磁机构储能电容进行故障诊断时存在较高的误判率的问题，提出了一种基于信息融合理论的电容失效诊断方法。通过分析储能电容的失效机理，得到其有效的故障特征参数，从而建立了储能电容状态评价的证据体系;为避免经验赋值的主观性，提出了基于：氐淖钚∧：扔呕Ｐ，以此模型求取储能电容诊断：低沉ナ舳群械奈粗问，并构建基于隶属度的电容状态基本概率分配函数。利用 D － S 证据合成规则实现多种故障信息的融合，并根据基本概率分配(BPA)决策准则来判断储能电容的状态。根据现场采集的数据，利用这种方法进行了实例分析，得到了其储能电容的当前状态评估结果，分析结果验证了该方法的有效性。关键词:储能电容;失效诊断;D － S 证据理论;：ナ舳;：刂型挤掷嗪:TD611 文献标志码:A文章编号:0253 －9993(2014)10 －2121 －07收稿日期:2013 － 09 － 05 责任编辑:许书阁基金项目:国家自然科学基金资助项目(51207110);中国博士后科学基金面上资助项目(2013M531210)作者简介:刘晓明(1987—)，女，山东烟台人，硕士研究生。E － mail:jiujiu9999@ 126． com。通讯作者:牟龙华(1963—)，男，教授，博士生导师。E － mail:lhmu@ tongji． edu． cnFailure diagnosis for storage-capacitor in permanent magnetic actuator offlameproof switchgear based on information fusionLIU Xiao-ming，MU Long-hua，ZHANG Xin(Department of Electrical Engineering，Tongji University，Shanghai 201804，China)Abstract:When the faults in energy-storage capacitor in flameproof switchgears are diagnosed with single evidence，thediagnostic system has a higher misdiagnosis． To overcome this problem，this paper proposes a capacitor failure diagno-sis method based on information fusion theory． Firstly，through analyzing the failure mechanism of storage-capacitor，thefeature parameters of capacitor were extracted，and the evidence source for state assessment was then obtained． Second-ly，the basic probability assignment for capacitor state was determined according to fuzzy membership functions to avoidthe subjectivity of membership assigned with expert experiences，and the membership function parameters were estab-lished by a minimum fuzzy optimization model． Finally，the different evidences were integrated by D-S combinationrule，and according to BPA decision rule，the condition of the energy storage capacitor in practical operation can be as-sessed． By using the method proposed and the operation data，the current state of the energy-storage capacitors wereobtained，and the evaluation study results demonstrate its effectiveness．Key words:storage-capacitor;failure analysis;D-S evidence theory;fuzzy membership;fuzzy entropy矿用高压隔爆开关是煤矿井下供电系统中的关键设备，其工作性能直接影响着煤矿井下的供电质量与安全生产。真空断路器是高压隔爆开关的关键部件，其操作机构的优劣对断路器的分合闸动态性能起