基于参数自适应调整的光伏阵列最大功率控制  

Photovoltaic maximum power control based on parameter adaptive adjustment

作　　者：徐海霸[1] 刘念[1] 马铁军[1] 雷浩辖[1] 

机构地区：[1]四川大学,四川成都610065

出　　处：《电力系统保护与控制》2011年第24期112-116,共5页Power System Protection and Control

摘　　要：针对最大功率的控制问题,采用自适应调整控制方法中的参数寻优来实现功率跟踪控制,目的是解决自适应因子的选取问题。基于晶体物理模型的等效电路,建立光伏阵列仿真模型,考虑光照和温度对光伏发电的影响,采用干扰观察法和PWM技术控制DC-DC电路实现最大功率输出。此外,分析了基于模糊控制方式和基于自适应调整方式的光伏阵列功率输出的优劣点,采用定步长和不定步长两种控制方式,实施光伏功率动态响应仿真。仿真结果表明,基于自适应调整方式的参数作为不定步长,不仅能快速有效地跟踪最大功率输出,相对于采用定步长方式,还能有效减免系统的波动性。This paper describes tracking control of photovoltaic maximum power using parameter adaptive adjustment, in order to solve the adaptive parameter selection problem. Photovoltaic array simulation model can be realized by using photovoltaic mathematical model based on equivalent circuit of physical model of the crystal. Considering the influence of radiation and temperature on photovoltaic power generation, the output of maximum power point can be gained through perturbing and observing and controlling DC-DC circuit with PWM technology. In addition, this paper analyzes advantages and disadvantages of photovoltaic array power output based on fuzzy control and adaptive adjustment control and implements dynamic response simulation of photovoltaic power using fixed step control and variable step control. The simulation results show that it is effective to track maximum output power by using variable step size, and it can also reduce the system fluctuation effectively.

关 键 词：光伏阵列 数学模型 最大功率输出 参数自适应调整 系统仿真 

分 类 号：TM615[电气工程—电力系统及自动化]