摘要
为减少光伏系统因外部条件变化而造成的功率损失,减小最大功率点(MPP)处的振荡,并且便于计算机软件实现,采用基于改进模糊控制的最大功率点跟踪(MPPT)技术。在光伏电池工程用数学模型的基础上,分析太阳能发电中的最大功率点原理;在跟踪过程各阶段引入不同的权重,设计了模糊控制规则,并且增加了PI控制环节以改善模糊控制。Matlab/Simulink仿真结果表明,改进的模糊控制光伏系统具有良好的动态性能和稳态性能,在最大功率点处输出功率稳定,提高了能量转化效率。
Maximum power point tracking （MPPT） based on improved fuzzy control,which is convenient to realize by computer software,is implemented in order to reduce the power loss caused by changeable environment and the oscil lation near the maximum power point（MPP）.The principle of the MPP is analyzed with an engineering mathematic model.The rule of fuzzy control with different weights in the process of tracking is proposed and the PI controller is introduced to improve the fuzzy control.The system simulation result shows that the solar system based on the improved fuzzy control can achieve dynamic and steady-state performance well and produce a more stable power that improved the efficiency of energy conversion.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第9期81-84,共4页
Proceedings of the CSU-EPSA
关键词
光伏
改进模糊控制
最大功率点跟踪
数学模型
系统仿真
photovoltaic
improved fuzzy control
maximum power point tracking
mathematic model
system simulation
