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.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第24期112-116,共5页
Power System Protection and Control
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
photovoltic array： mathematical model
output of maximum power
paremeter adaptive adjustment
system simulation
