光伏并网的控制策略与最大功率点跟踪的仿真分析

太阳能是一种丰富干净的可再生性能源,研究可靠的光伏并网发电系统控制策略和光伏电池输出特性与最大功率跟踪是非常重要。该文分析了光伏电池的工程数学模型,根据光伏电源输出特性与交流电源之间功率流动特征,提出了并网控制方案采用电压电流双闭环控制结构方法相结合的单级式光伏并网系统,使光伏电源并网逆变器输出电流完全与电网电压相位一致。此外,针对最大功率跟踪算法的实现和并网控制策略的配合问题进行了稳定性分析,最后通过仿真与实验验证了理论分析的正确性及控制策略的可行性。

The Control Schemes of a Photovoltaic Grid-connected System and Maximum Power Point Tracking

Effective control strategies for reliable photovoltaic（PV） grid-connected systems and PV output characteristics with maximum power tracking are needed to efficiently use solar energy, an abundant and clean renewable energy sOurce.This paper analyzes the photovoltaic Engineering mathematical model, and the means for transferming the power from the Photovoltaic power output characteristics to AC power.The control strategy Use voltage and current double closed-loop control structure in single-stage method of photovoltaic grid-connected system, This controller makes the PV grid-connected voltage source in verter output current to be inphase with the grid voltage.Then the stability influenced by the interaction of the foregoing control methods was analyzed.Finally the correctness and availability of such theory are proved by the simulation and experiments.