基于上下续电流的功率变换器故障诊断方法

发布时间：2018-04-09 23:17

本文选题：开关磁阻　切入点：功率变换器　出处：《电机与控制学报》2017年11期

【摘要】：开关磁阻起动/发电系统中功率变化器是核心部件,其故障将会给系统带来不可估量的影响。针对功率变换器的典型电气故障(上下管的开、短路故障)进行了分析,研究了上下续电流的变化,结合电动状态和发电状态的共同点和不同点,基于上下续电流分别提出了一种在线故障诊断方案,利用上下续电流在一个周期内积分值的变化,来进行判断故障类型和故障位置;同时利用数字化的思想,提取了故障特征系数F'_(AB1)、F'_(AB2)和F'_(A12),利用判断特征系数来进行在线的故障诊断;最后搭建了开关磁阻起动/发电系统的故障诊断模型并分别进行了仿真验证。结果表明:该方案在电动和发电状态都能够实现在线的故障诊断,并且实现了故障验证;与相电流故障诊断相比,大大降低了虚警率。
[Abstract]:The power changer is the core component in switched reluctance starting / generating system, and its failure will bring incalculable influence to the system.In this paper, the typical electrical faults of power converter (up-and-down switch, short circuit fault) are analyzed, and the change of up-and-down continuous current is studied. The common points and differences between electric state and generation state are combined.In this paper, an on-line fault diagnosis scheme is proposed based on the up-and-down continuation current, which uses the variation of the integral value of the up-and-down continuation current in a period to judge the fault type and the fault location, and at the same time, the idea of digitization is used to determine the fault type and location of the fault.The fault characteristic coefficient (FKA _ (1) A / A _ (2)) and F _ (T _ (12)) are extracted for on-line fault diagnosis, and the fault diagnosis model of switched reluctance starting / generating system is set up and verified by simulation, in the end, the fault diagnosis model of the switched reluctance starting / generating system is established, and the fault diagnosis model of the switched magnetoresistive starting / generating system is simulated.The results show that the scheme can realize on-line fault diagnosis and fault verification in both electric and power generation states, and greatly reduce false alarm rate compared with phase current fault diagnosis.
【作者单位】：空军工程大学航空航天工程学院;
【基金】：国家自然科学基金(61074007)
【分类号】：TM46

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