一种有源电力滤波器中IGBT故障诊断与容错技术研究

发布时间：2019-06-28 16:33

【摘要】：随着社会的迅速发展和科技的快速进步，人们对电能质量的要求越来越高。有源电力滤波器因其能动态治理各次谐波和进行无功补偿而得到广泛应用。然而有源电力滤波器也像大多数电力电子装置一样，在不正当操作或突发情况下会发生各种故障，导致整个系统不能正常工作，严重时将造成灾难性后果。因此，为了提高系统的可靠性，增长APF的安全运行时间，降低因工业中APF故障系统不能正常运行而造成的重大损失，对有源电力滤波器的故障诊断与容错控制的研究具有重要的理论意义和应用价值。针对APF（有源电力滤波器）中IGBT在长期运行时容易出现故障的情况，将三相电机中基于电流Clark矢量变换诊断故障的方法引用到有源电力滤波器的故障诊断中，并分析了APF容错拓扑结构。APF是通过输出与负载电流的谐波大小频率相等、方向相反的电流来抑制谐波，其输出电流波形复杂，国内外对APF故障诊断的相关研究尚处于起步阶段，本文分别提取APF输出电流的基波分量、5次谐波分量和7次谐波分量进行比较分析对比，最终选取基波分量来进行Clark变换，利用其电流Clark矢量轨迹及轨迹斜率来诊断IGBT开路故障，提出通过DSP软件程序实现故障诊断的方法，，同时给出APF容错拓扑结构以及容错控制实施方法。本文在MATLAB/simulink平台上对并联型APF控制系统仿真模型进行了详细设计，对系统主电路参数进行了设计，并对每个子模块的仿真进行了设计。通过仿真实验，说明了本仿真模型效果良好，可以进行下一步的故障仿真。最后通过仿真实验平台对本文提出的故障诊断方法以及容错拓扑结构进行了仿真实验研究，验证了其正确性及可靠性。
[Abstract]:With the rapid development of society and the rapid progress of science and technology, people's demand for electric energy quality is getting higher and higher. The active power filter can be widely used because of its dynamic control of the harmonics and reactive power compensation. However, that active pow filter, like most of the power electronic device, can cause a variety of failures in an improper operation or a burst, resulting in an inability of the overall system to work properly, which will result in catastrophic consequences when severe. Therefore, in order to improve the reliability of the system, the safe running time of the APF is increased, and the heavy losses caused by the failure of the APF fault system in the industry can be reduced, and the research on the fault diagnosis and fault-tolerant control of the active power filter is of great theoretical significance and application value. In the case of the fault of the IGBT in the long-term operation of the IGBT in the APF (active power filter), the fault diagnosis method based on the current-Clark vector transformation in the three-phase motor is referred to the fault diagnosis of the active power filter, and the fault-tolerant topology of the APF is analyzed. The output current is complex, and the relevant research on the fault diagnosis of APF at home and abroad is still in the early stage. In this paper, the fundamental component, the fifth harmonic component and the 7th harmonic component of the APF output current are respectively extracted and compared, the fundamental component is selected to perform the Clark transformation, and the current Clark vector trace and the track slope of the fundamental wave component are used to diagnose the IGBT open circuit. The method of fault diagnosis by DSP software program is proposed, and the fault-tolerant topology and fault-tolerant control of APF are given. In this paper, the simulation model of the parallel APF control system is designed on the MATLAB/ Simulink platform, the main circuit parameters of the system are designed, and the simulation of each sub-module is carried out. The simulation experiment shows that the simulation model has good effect and the next step can be carried out. In the end, the fault diagnosis method and the fault-tolerant topological structure proposed in this paper are simulated by the simulation experiment platform, and the correctness and the correctness of the fault-tolerant topology are verified.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761

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