摘要
基于模型预测控制(MPC)理论,提出一种应用于交直流混合微电网中互联变流器的控制策略,平衡交直流子网功率分配,提高系统稳定性。根据互联变流器的工作模态建立其动态数学模型,利用直流侧输出电压与参考电压的关系控制变流器的运行模式。设计了基于电压电流双闭环的MPC策略,并提出一种互联变流器在整流状态下的新型启动控制策略,实现低电流应力启动互联变流器。仿真结果验证了该策略的合理性与可行性。样机实验结果表明该系统在整流和逆变状态下均可实现单位功率因数运行,且具有良好的动静态性能。
Based on the model predictive control(MPC)theory,a control strategy for interlinked converter in AC/DC hybrid microgrid is proposed to balance the power distribution of AC and DC subnets and improve system stability.The dynamic mathematical model is established according to the working mode of the interlinked converter,and the operating mode of the converter is controlled by the relationship between the output voltage of the DC side and the reference voltage.A MPC strategy based on voltage and current double closed loop is designed,and a new startup control strategy of interlinked converter in rectifier state is proposed to realize low current stress startup converter.The simulation results verify the rationality and feasibility of the strategy.The experimental results show that the system can achieve unit power factor in both rectifier and inverter states,and has good dynamic and static performance.
作者
郭强
夏松
刘述喜
魏苏东
GUO Qiang;XIA Song;LIU Shu-xi;WEI Su-dong(Chongqing University of Technology,Chongqing 400054,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第11期12-16,共5页
Power Electronics
基金
重庆市基础科学与前沿技术研究专项(cstc2016jcyjA1527)。
作者简介
郭强(1984-),男,重庆人,博士,研究方向为大功率整流器、汽车电子等。
