光伏发电系统效率优化控制仿真

Simulation of Efficiency Optimization Control for Photovoltaic Power Generation System

在光伏发电系统效率的优化控制的研究中,传统光伏发电系统的效率优化主要是针对光伏发电系统的最大功率追踪算法(MPPT)进行改进,以期实现光伏阵列最大功率的实时和稳定输出。用Boost电路的物理模型,建立了Boost电路的精确状态方程,并对不同参数下Boost电路的动力学特性进行了研究,验证了Boost电路中电容对电路输出的影响最明显;然后,将Boost电路的上述特性引入光伏发电系统,通过微调Boost电路中的电容,对光伏发电系统的追踪效率进行优化。结果表明,通过调节Boost电路的电容可以改善光伏发电系统最大功率追踪的实时性,以达到高效追踪的目的,且追踪效率更高。

Traditional efficiency optimization methods for PV power generation system mainly aim at improving the maximum power tracking algorithm （MPPT） , and getting the maximum power output of PV array with instanta- neity and stability. An accurate state equation of the Boost circuit is built, the influences of different parameters for dynamic property of Boost circuit are studied, and the effect of capacitance on the circuit output is verified. Then aforementioned characteristics of Boost circuit are introduced into photovoltaic power generation systems, and the tracking efficiency of photovohaic power generation systems is optimized by turning capacitance of the Boost circuit. Results show that the high - efficiency tracking power can be achieved by adjusting capacitance of Boost circuit.