基于电流预测的微网下垂控制策略研究

Research on Droop Control Strategy of Microgrid Based on Current Prediction

针对微网孤岛模式下逆变器输出阻抗差异性导致功率分配不均的现象,提出一种基于电流预测的下垂控制策略。基于逆变器输出电流变化,建立电流预测模型,采用模型预测控制方法预测电流并优化控制参数,有效减小微网孤岛模式下由于负荷扰动造成的电压、频率振荡。通过仿真计算验证了所提出的电流预测下垂控制策略的正确性和有效性。

For inverter output impedance differences leading uneven distribution of power in microgrid island mode, this paper presented a control strategy based on P-Uand Q-f. Based on changes in inverter output current, this paper presented the current predictive control algorithm, and used model predictive method for predicting the current and optimizing control parameters, reducing the voltage and frequency oscillation caused by disturbances. Through the simulation and calculation, this paper verifies the correctness and effectiveness of the proposed current predictive droop controller.