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电网技术  2014 

基于混合逻辑动态模型的三相逆变电路有限控制集模型预测控制策略

DOI: 10.13335/j.1000-3673.pst.2014.02.016, PP. 375-380

Keywords: 逆变电路,混合逻辑动态模型,模型预测控制,状态观测器,有限控制集模型预测控制

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Abstract:

逆变电路传统开关函数模型只能描述电路的控制变迁而忽略了电路的条件变迁,为此,建立了三相逆变电路混合逻辑动态(mixedlogicaldynamical,MLD)模型。在此基础上,将其作为预测模型,提出了电路的有限控制集模型预测控制(finitecontrolsetmodelpredictivecontrol,FCS-MPC)策略。FCS-MPC充分考虑了电路的离散特性,选择有限控制集中使目标函数值最小的开关状态作为电路开关管的控制信号,从而控制电路的输出电压,无需任何调制器,可简化MPC的优化问题。此外,基于全维状态观测器设计了电路负载电流观测器,增强了控制器的鲁棒性。仿真和实验结果验证了所提方法的有效性。

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