离网光伏系统功率控制仿真

Simulation of off-grid photovoltaic system power control

分析了不同气象条件下离网光伏系统的能量流动关系,提出了基于最大功率追踪和负载功率跟踪控制的协调控制方案。该控制方案综合考虑了能源的最大利用率与蓄电池的安全性,从而使光伏系统安全可靠运行。利用机理建模建立了蓄电池模型,光伏电池模型,B uck变换器模型,并搭建了整个离网光伏系统的模型。最后在M atlab/S im ulink环境下对该控制方案进行了仿真验证。

The energy flow of off-grid photovoltaic system in different weather conditions was analyzed and the coordination control scheme based on maximum power tracking control and load power tracking control was presented. The maximum utilization of the energy and the safety of the battery was taken into account so that the system could operate safely and reliably. The mechanism modeling was used to establish battery model, solar model, Buck converter, and the entire photovoltaic system model was built. At last, the scheme was verified through simulation under Matlab/Simulink environment.