一种基于CPT的多主从式孤岛微电网协同控制模式

Multi-master-slave island microgrid cooperative control mode based on CPT

微电网中功率逆变器的协同控制具有提高敏感负载总线电能质量的功能,这种协同作用对于存在电抗、非线性和不平衡的负载尤为重要。在三相四线分布式孤岛微电网中,提出一种基于CPT的多主从式协同控制模式。与传统多主从模式相比,该模式中的从属参考电流是基于CPT由负载电流合成,由此得到的参考电流更加清晰,使补偿更灵活。仿真结果表明在负载变化的情况下,该模式能够提高电能质量并在合理时间内消弱干扰,保障供电可靠性。

The cooperative control of the power inverter in the microgrid has the function of improving the power quality of the sensitive load bus. This synergy is especially important for the presence of reactance, non-linearity and unbalanced loads. In this paper, a multi-master-slave collaborative control mode based on CPT is proposed in a three-phase four-wire distributed island microgrid. Compared with the traditional multi-master-slave mode, the slave reference current in this strategy is synthesized based on the CPT from the load current, and the resulting reference current is more clear, making the compensation more flexible. The simulation results show that under the condition of load change, this mode can improve the power quality and weaken the interference in a reasonable time to ensure the reliability of power supply.