| 基于滑模观测器的MMC IGBT开路故障诊断 |
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| 引用本文： | 柏同杨,汪飞,吴春华,郭慧.基于滑模观测器的MMC IGBT开路故障诊断[J].电子测量技术,2017,40(11):44-47. |
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| 作者姓名： | 柏同杨 汪飞 吴春华 郭慧 |
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| 作者单位： | 上海大学机电工程与自动化学院 上海 200072,上海大学机电工程与自动化学院 上海 200072,上海大学机电工程与自动化学院 上海 200072,上海大学机电工程与自动化学院 上海 200072 |
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| 基金项目： | 上海市教育委员会科研创新项目 |
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| 摘 要： | 为了提高模块化多电平变换器(MMC)系统的可靠性,提出了一种基于滑模观测器的MMC子模块(SM)开路故障诊断方法.首先根据MMC的运行原理设计了滑模观测器.再利用观测器估计的输出与传感器测量的输出构造残差信号,通过对残差信号的分析实现子模块开路故障的检测.然后根据故障子模块输出电压特性确定故障位置.最终,在MATLAB/Simulink中搭建单相MMC仿真模型,模拟其中的一个子模块的IGBT发生开路并进行故障诊断.结果表明提出故障诊断方法的正确性.
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| 关 键 词： | 模块化多电平变换器 故障诊断 IGBT开路 滑模观测器 |
IGBT open circuit fault diagnosis for MMC based on sliding mode observer |
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| Bai Tongyang,Wang Fei,Wu Chunhua and Guo Hui.IGBT open circuit fault diagnosis for MMC based on sliding mode observer[J].Electronic Measurement Technology,2017,40(11):44-47. |
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| Authors: | Bai Tongyang Wang Fei Wu Chunhua and Guo Hui |
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| Affiliation: | Institute of Electrical and Mechanical Engineering and Automation, Shanghai University, Shanghai 200072, China,Institute of Electrical and Mechanical Engineering and Automation, Shanghai University, Shanghai 200072, China,Institute of Electrical and Mechanical Engineering and Automation, Shanghai University, Shanghai 200072, China and Institute of Electrical and Mechanical Engineering and Automation, Shanghai University, Shanghai 200072, China |
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| Abstract: | To improve the reliability of the modular multilevel converter (MMC) system,an open circuit fault diagnosis method based on sliding mode observer for MMC sub-module(SM) is proposed.First,the sliding mode observer is designed according to the operating principle of MMC.Then,the residual signal is constructed by the output of the observer and the output by the sensor.The residual signal is analyzed to realize the open circuit fault detection.Then,the fault location is determined according to the output voltage characteristic of fault sub-module.Finally,the single-phase MMC simulation model is constructed in Matlab/Simulink,and one of the sub-modules of the IGBT is opened and the fault diagnosis is carried out.The simulation results show the correctness of the proposed fault diagnosis method. |
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