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Fault-Tolerant Control of ANPC Three-Level Inverter Based on Order-Reduction Optimal Control Strategy under Multi-Device Open-Circuit Fault

机译:多设备开路故障下基于降阶最优控制策略的ANPC三电平逆变器容错控制

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摘要

The multi-device open-circuit fault is a common fault of ANPC (Active Neutral-Point Clamped) three-level inverter and effect the operation stability of the whole system. To improve the operation stability, this paper summarized the main solutions currently firstly and analyzed all the possible states of multi-device open-circuit fault. Secondly, an order-reduction optimal control strategy was proposed under multi-device open-circuit fault to realize fault-tolerant control based on the topology and control requirement of ANPC three-level inverter and operation stability. This control strategy can solve the faults with different operation states, and can works in order-reduction state under specific open-circuit faults with specific combined devices, which sacrifices the control quality to obtain the stability priority control. Finally, the simulation and experiment proved the effectiveness of the proposed strategy.
机译:多设备开路故障是主动中性点钳位三电平逆变器的常见故障,会影响整个系统的运行稳定性。为了提高运行稳定性,本文首先总结了目前的主要解决方案,并分析了多设备开路故障的所有可能状态。其次,基于ANPC三电平逆变器的拓扑结构和控制要求以及运行稳定性,提出了多设备开路故障下的降阶最优控制策略,以实现容错控制。该控制策略能够解决具有不同运行状态的故障,并且在特定的开路故障下使用特定的组合装置可以在降序状态下工作,从而牺牲了控制质量来获得稳定性优先控制。最后,仿真和实验证明了该策略的有效性。

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