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申请号:202010164286.2 公开号:CN111221253A 主分类号:G05B13/04
摘要:【中文】本发明公开了一种适用于三相并网逆变器的鲁棒模型预测控制方法,通过构建滑模扰动观测器对并网电抗参数不匹配引起的集中扰动进行观测,并将扰动观测值补偿至系统预测模型。在此基础上,将三相并网逆变器的有功电流和无功电流输出控制叠加至模型预测控制的价值函数中,依次求得所有有效开关状态下价值函数的值,则使价值函数最小的有效开关状态为最优开关状态,并被选择以触发并网逆变器。本发明公开的鲁棒模型预测控制方法的优点在于:可在并网电抗器的标称参数与其实际参数不匹配时减小模型预测控制的跟踪误差,提高模型预测控制的抗扰动性能,增强系统鲁棒性。 【EN】The invention discloses a robust model prediction control method suitable for a three-phase grid-connected inverter, which observes concentrated disturbance caused by mismatching of grid-connected reactance parameters by constructing a sliding mode disturbance observer and compensates a disturbance observation value to a system prediction model. On the basis, active current and reactive current output control of the three-phase grid-connected inverter are superposed into a value function of model prediction control, values of the value function in all effective switching states are sequentially obtained, the effective switching state with the minimum value function is made to be the optimal switching state, and the optimal switching state is selected to trigger the grid-connected inverter. The robust model prediction control method disclosed by the invention has the advantages that: the tracking error of model predictive control can be reduced when the nominal parameter of the grid-connected reactor is not matched with the actual parameter of the grid-connected reactor, the disturbance resistance of the model predictive control is improved, and the robustness of the system is enhanced.
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