考虑SOC自均衡的光储独立微电网协调控制

Coordinated Control for PV/Storage Hybrid Islanded Microgrid Considering SOC Balancing

针对多分布式电源组成的混合微电网,考虑孤岛模式下光伏与储能系统协调运行,对其能量管理控制策略展开研究。首先,考虑储能系统荷电状态SOC平衡,提出了一种改进的动态下垂控制策略,以提高不同储能系统间输出功率的均衡度,延长储能单元使用寿命。其次,针对光伏输出功率波动以及SOC状态变化,设计了分布式电源的多模式切换控制算法,根据场景运行在不同的控制模式,实现分布式微电网能量管理目标。通过搭建Matlab/Simulink仿真模型,储能系统能够根据SOC状态快速分配功率,同时协调光伏系统维持微电网稳定运行,验证了所提控制策略的可行性和有效性。

For the hybrid microgrid composed of multiple distributed generations,considering the coordinated control of photovoltaic and energy storage system in islanded mode,the energy management strategy is studied.Firstly,an improved dynamic droop control method considering SOC balancing is proposed,to enhance the power balancing between different energy storage systems and prolong the service life of the battery.Secondly,since the photovoltaic output power fluctuation and SOC states variation,a multi-mode switching control algorithm for distributed power supplies is designed.Depending on the scenarios,it operates in different control modes to achieve energy management objectives of the decentralized microgrid.By constructing the Matlab/Simulink model,the energy storage system can quickly allocate the power according to the SOC state,and coordinate the PV system to maintain the stable operation of the microgrid,thus verifying the feasibility and effectiveness of the proposed control strategy.