基于智能一致性算法的微网功率控制策略研究

Research on Power Control Strategy of Microgrid Based on Intelligent Consensus Algorithm

由于分布式电源(DG)特性的差异,应用传统的下垂控制策略会导致微电网功率分配不均匀,严重时影响微电网系统运行的稳定性。为此,提出了一种基于智能一致性算法的微电网功率控制策略。该方法采用临近DG的无功信息,通过一致性算法使得各DG的无功全局收敛一致。此外,从数学上证明了一致性算法的收敛性和稳定性。最后,建立小型微电网实验系统验证了所提控制策略的有效性。结果表明,所提控制策略可实现有功和无功的合理均分,具有较好的稳态和动态性能。

Due to the difference of distributed generation(DG)units,the application of the traditional droop control strategy leads to uneven power distribution of the microgrid,which affects the operation stability of the microgrid system seriously.A power control strategy of microgrid based on consensus algorithm is proposed.The method uses the reactive power information near the DG source,and makes the reactive power of the DG unit converge globally by consistency algorithm.In addition,the convergence and stability of the conformance algorithm are proved mathematically.Finally,a small scale microgrid experimental system is established to verify the effectiveness of the proposed control strategy.The results show that the proposed control strategy can realize the rational distribution of active and reactive power,and also has a good dynamic and steady-state performance.