基于一致性算法的直流微电网的分层协调控制策略

Cooperative Control Strategy of Islanded DC Microgrids Based on Consensus Algorithm

本文针对在孤岛模式下的直流微电网,提出了基于一致性算法的协调控制策略。对于多个储能单元采用分层控制方法,第1层控制采用I-U下垂控制方法,第2层控制采用基于离散一致性算法的二次电压补偿和均流控制,以实现对母线电压调节和功率均分。对于分布式电源,能自动在最大功率跟踪控制和下垂模式之间切换以保证直流微电网功率平衡。最后,在simulink平台中验证了在多种工况下该控制策略的有效性。

A distributed coordination control strategy based on consensus algorithm for DC microgrid in islanding mode was proposed. For multiple energy storage units, a hierarchical control method was adopted： the I U droop control meth od was adopted by the first layer control. The secondary voltage compensation was adopted by the second level control and the current sharing control based on the discrete consistency algorithm was used to realize the bus voltage adjustment and the power equalization. For a distributed power source, it could automatically switch between maximum power tracking control and droop mode to ensure DC microgrid power balance. Finally, a simulation model was built in simulink to verify the effectiveness of the control strategy designed under different conditions.