并网逆变器预测电流控制算法性能分析

在并网逆变器预测电流控制算法中,当模型电感与实际电感参数不匹配时可能导致控制算法不稳定,而无法有效跟踪并网逆变器的输出电流,为此提出了一种改进型预测电流控制算法.在对比分析几种现有预测电流控制算法优缺点的基础上,总结了预测电流控制算法的构建原则,通过对目标电流误差以及目标输出电压的表达式进行重建,降低了预测电流控制算法的阶数.计算机仿真以及实验结果验证了改进型预测电流控制算法的可行性以及可靠性

Performance Analysis on Predictive Current Regulation Algorithms for Grid-Connected Inverter

The predictive current regulation algorithms for grid-connected inverter may be unstable while the model inductance mismatches to actual inductance,thus the output current of grid-connected inverter cannot be tracked effectively.For this reason,an improved predictive current regulation algorithm is proposed.On the basis of comparing and analyzing the merit and demerit of several existing predictive current regulation algorithms,the principle to construct the predictive current regulation algorithm is summarized,and by means of reconstructing the expressions for target current error and target output voltage,the order number of predictive current regulation algorithm is reduced.Both results of simulation and experiments show that the proposed predictive current regulation algorithm by which the tolerance of inductance mismatching and stability margin can be evidently improved is feasible and reliable.