摘要
光伏发电系统处于复杂光照条件下时,光伏电池阵列的输出特性呈多峰现象,致使传统的MPPT算法追踪结果可能停留在次优点。针对此问题,提出一种基于电压预估法的光伏发电系统MPPT算法,采用DMPPT电路结构的光伏阵列,通过研究其输出特性,得到复杂光照条件下光伏阵列最大功率点对应的工作电压最佳区域,并以该预估到的电压值为基础,设计了一种新型的MPPT控制算法。仿真结果表明,所提算法能有效避免光伏系统工作在次优点,提高了光伏发电的出力。
The output characteristics of PV array are multi-peaks when PV array is under the condition of complex illumination.So,the result of the traditional MPPT algorithm may trap into suboptimum point.To solve this problem,the MPPT algorithm of PV power generation system is put forward based on the voltage prediction method.It uses PV array of DMPPT circuit structure.Through the study of its output characteristics,working voltage of the best areas of PV array corresponding to the maximum power can be obtained under the condition of complex illumination point.Then based on the estimated voltage value,a new type of MPPT control algorithm is designed.The simulation results show that the MPPT algorithm can effectively avoid the PV system working in the suboptimum point and improve the output power of PV system.
出处
《水电能源科学》
北大核心
2016年第5期211-214,210,共5页
Water Resources and Power
基金
三峡大学2015年硕士学位论文培优基金资助(2015PY037)
梯级水电站运行与控制湖北省重点实验室基金资助项目(2015KJX07)
煤燃烧国家重点实验室开放基金资助项目(FSKLCCA1607)
关键词
次优点
DMPPT
特性研究
电压预估法
suboptimum point
DMPPT
characteristic research
voltage forecast
