Open-Switch Fault Diagnosis and Fault Tolerant for Matrix Converter With Finite Control Set-Model Predictive Control
Open-Switch Fault Diagnosis and Fault Tolerant for Matrix Converter With Finite Control Set-Model Predictive Control
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DOI：
10.1109/tie.2016.2558139
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发表时间：
2016-04
影响因子：
7.7
通讯作者：
Tao Peng;Hanbing Dan;Jian Yang;Hui Deng;Qi Zhu;Chunsheng Wang;W. Gui;J. Guerrero
中科院分区：
文献类型：
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作者：
Tao Peng;Hanbing Dan;Jian Yang;Hui Deng;Qi Zhu;Chunsheng Wang;W. Gui;J. Guerrero
为了提高矩阵变换器（MC）的可靠性，本文提出了一种识别单开关开路故障的故障诊断方法。所引入的故障诊断方法基于有限控制集模型预测控制（FCS-MPC），该方法采用MC拓扑的时间离散模型和成本函数来选择下一个采样周期的最佳开关状态。该故障诊断方法通过监测负载电流并判断开关状态来定位故障开关来实现。与基于载波的调制方法、间接空间矢量调制和最优Alesina-Venturini等传统调制策略相比，FCS-MPC在采样周期内具有已知且不变的开关状态。使用 FCS-MPC 可以更简单地诊断 MC 中断开开关的确切位置。为了在没有任何冗余硬件的情况下在单开路开关故障条件下实现更好的输出电流质量，还研究了基于预测控制的容错策略。容错策略是选择与MC的剩余正常开关相关的最合适的开关状态。实验结果表明了所提出的故障诊断方法和容错策略的可行性和有效性。
To improve the reliability of the matrix converter (MC), a fault diagnosis method to identify a single open-switch fault is proposed in this paper. The introduced fault diagnosis method is based on finite control set-model predictive control (FCS-MPC), which employs a time-discrete model of the MC topology and a cost function to select the best switching state for the next sampling period. The proposed fault diagnosis method is realized by monitoring the load currents and judging the switching state to locate the faulty switch. Compared to the conventional modulation strategies such as carrier-based modulation method, indirect space vector modulation, and optimum Alesina-Venturini, the FCS-MPC has known and unchanged switching state in a sampling period. It is simpler to diagnose the exact location of the open switch in MC with FCS-MPC. To achieve better quality of the output current under single open-switch fault conditions without any redundant hardware, a fault tolerant strategy based on predictive control is also studied. The fault tolerant strategy is to select the most appropriate switching state associated with the remaining normal switches of the MC. Experiment results are presented to show the feasibility and effectiveness of the proposed fault diagnosis method and fault tolerant strategy.