摘要
由于光伏发电系统的非线性特性,难以运用数学手段确定其最大功率跟踪MPPT(maximum power pointtracking)过程输出功率的合理采样周期。针对基于Boost电路光伏发电系统进行MPPT过程,对工作点输出功率最佳采样周期进行仿真和采样,分析了全过程采样周期的分布规律。分析表明,不同环境条件下,最佳采样周期最大值近似为恒定值,因而选取该恒定值作为适合于MPPT全过程的采样周期,保证了MPPT算法的跟踪速度和跟踪精度。
Due to the nonlinearity of photovoltaic power generation system,it is difficult to determine a proper sampling period at each operating point in the maximum power point tracking(MPPT)mathematically. Based on the simulation and sampling of the optimal sampling period during MPPT for the Boost-based photovoltaic power generation system,this paper analyses the distribution pattern of the sampling period. It is indicated that since the maximum of optimal sampling period approximates to a constant value under different environmental conditions,this value is selected as the proper sampling period for the whole process of MPPT,which ensures the tracking speed and precision of MPPT.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2016年第10期55-60,共6页
Proceedings of the CSU-EPSA
基金
天津市自然科学基金重点资助项目(12JCZDJC21300)
关键词
采样周期
最大功率跟踪
BOOST变换器
光伏发电系统
非线性
sampling period
maximum power point tracking
Boost converter
photovohaic power generation system
nonlinearity