微电网中储能系统的集成设计与控制策略

Integrated Design and Control Strategy of Energy Storage System in Micro-Grid

由于光照强度与温度变化,光伏发电功率的波动导致微网系统并网侧功率发生较大波动。通过控制电池储能系统的有功功率,可以使平滑光伏电源功率波动成为可能。研究了光储联合发电系统的运行模式,提出了适用于光储联合发电系统的集成设计和控制策略,并对储能用功率转换系统进行了分析和设计;最后基于某光伏电站和负荷的实际历史运行数据,对所提出的方案进行仿真研究。仿真结果验证了光储联合发电系统控制策略的有效性,锂电池储能并网系统能够稳定地并网/离网运行。

As sunlight intensity and temperature vary,the photovoltaic power surges,resulting in the great fluctuation of power on the point connected the grid and the micro-grid. By controlling the active power of battery energy storage system,the photovoltaic power surges can be clamed down. This paper studies the operation mode of the photovoltaic-storage combined power generation system,and proposes its integrated design and control strategy. Then,this paper analyzes and designs the power conversion system for energy storage. Finally,this paper carries out the simulation study on the proposed scheme,based on the actual historical operation data of a photovoltaic power station and load. The simulation results verify the effectiveness of the control strategy of the photovoltaic-storage combined power generation system. The lithium battery energy storage and grid-connected system can steadily run in grid-connected or off-grid,and the switching transition process is smooth and stable.