准Z源逆变器的有限开关序列模型预测控制

Finite Switching Sequence Model Predictive Control for Quasi-Z-source Inverter

以准Z源逆变器(QZSI)为研究对象,提出了一种有限开关序列模型预测控制(FSS-MPC)策略。首先,介绍了QZSI电路拓扑、离散化数学模型和系统控制策略;然后,介绍了现有FSS-MPC策略的开关序列及其性能。为克服现有FSS-MPC策略中存在储能电感电流纹波和共模漏电流较大以及开关次数较多的缺点,提出了一种基于临近电压矢量的FSS-MPC策略。最后,通过实验对两种FSS-MPC策略性能进行对比验证,结果证明了所提控制策略的可行性和有效性。

A finite switching sequence model predictive control(FSS-MPC)strategy is proposed for quasi-Z-source inverter(QZSI).Firstly,the circuit topology,discrete mathematical model and system control strategy of QZSI are introduced.Then,the switching sequences and the performance of the existing FSS-MPC strategy are introduced.In order to overcome the disadvantages of the existing FSS-MPC strategy,such as large storage inductance current ripple,large common mode leakage current and more switching times,an FSS-MPC strategy based on near voltage vectors is proposed.Finally,the feasibility and effectiveness of the proposed control strategy are verified by the experiments of comparing the performance of the two FSS-MPC strategies.