基于模型预测的微电源逆变器控制
摘要：微电源逆变器的传统控制方法具有设计复杂、鲁棒性低等缺点，为了提高微电源逆变器的快速准确响应，提出将模型预测控制(model predictive control，MPC)引入逆变器。根据逆变器并网孤岛状态运行需求，设计了模型预测PQ控制方案和基于下垂特性的U/f模型预测控制方案，通过LC滤波器中电感和电容建立微分方程，推导出相应的数学预测模型，在并网运行时，控制逆变器输出电流跟踪由功率指令生成的参考电流；在孤岛运行时，控制逆变器跟踪功率控制器生成参考电压和频率。仿真表明，2种控制方案都实现了有效跟踪，并且相比于传统PI控制，系统响应速度快、超调小控制精度高。仿真证明了控制策略的可行性，使逆变系统达到了良好的控制效果。
Abstract:In traditional control methods for micro power inverter there were such shortcomings as complicated design and low robustness, to make micro power inverter possessing fast and accurate response it was proposed to lead model predictive control (MPC) into the inverter. According to the requirements of grid-connected and island operation of the inverter, the model predictive PQ control scheme and the U/f model predictive control scheme based on the droop characteristics were designed, and by means of the inductor and capacitor in the LC filter the differential equations were established and corresponding mathematical prediction model was derived. During the grid-connected operation the output current of the controlled inverter traced the reference current generated by power instruction; during the islanded operation the controlled inverter traced the reference voltage and frequency generated by power controller. Simulation results show that both control schemes achieve effective tracking, and the system response is fast, the overshoot is small and the control accuracy is high. The feasibility of the proposed control strategies is proved by simulation results, and the proposed control strategies make the inverter system achieving a good control effect.
标题：基于模型预测的微电源逆变器控制
英文标题：Control of Micro Power Inverter Based on Model Prediction
作者：周威, 雷勇, 张刚, 刘晖,
关键词：微电源逆变器, LC滤波器, 模型预测控制(MPC), 功率控制, 下垂控制,
发表日期：2022-01-10
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