Fault Detection for Modular Multilevel Converters Based on Sliding Mode Observer
Fault Detection for Modular Multilevel Converters Based on Sliding Mode Observer
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DOI：
10.1109/tpel.2013.2242093
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发表时间：
2013-01
影响因子：
6.7
通讯作者：
Shuai Shao;P. Wheeler;J. Clare;A. Watson
中科院分区：
文献类型：
--
作者：
Shuai Shao;P. Wheeler;J. Clare;A. Watson
本文提出了一种模块化多电平变流器的故障检测方法，能够定位电路中的故障半导体开关器件。该故障检测方法基于滑模观测器(SMO)和半桥开关模型，所采用的方法是猜测故障位置，相应地修改SMO，然后将观测到的状态与测量的状态进行比较以验证假设。这种技术不需要额外的测量元件，可以很容易地在DSP或微控制器中实现。对半导体开关器件开路故障情况的仿真结果验证了故障检测技术的有效性和稳健性。
This letter presents a fault detection method for modular multilevel converters which is capable of locating a faulty semiconductor switching device in the circuit. The proposed fault detection method is based on a sliding mode observer (SMO) and a switching model of a half-bridge, the approach taken is to conjecture the location of fault, modify the SMO accordingly and then compare the observed and measured states to verify, or otherwise, the assumption. This technique requires no additional measurement elements and can easily be implemented in a DSP or microcontroller. The operation and robustness of the fault detection technique are confirmed by simulation results for the fault condition of a semiconductor switching device appearing as an open circuit.