摘要
最大功率点跟踪技术是光伏发电系统的关键技术之一。文章在Matlab中搭建了光伏系统最大功率点跟踪模型,并针对功率预测-扰动观察法在太阳辐照度快速变化时出现的误判现象以及最大功率点处振荡等问题,提出一种基于β参数的混合控制策略,该方法以β值为界限将跟踪过程分为两个阶段,分别采用变步长扰动法和模糊控制法,在太阳辐照度非匀速变化时,快速追踪最大功率点,避免了误判现象,并提高了系统的稳态精度。
Maximum power point tracking is one of key techniques in the photovoltaic power generation system. A mixed control strategy based on β-parameter is proposed in this paper in order to reduce misjudgment and oscillation at maximum power points （MPP） under traditional power prediction algorithm when illumination changes suddenly. The tracking process is divided into two phases with the value of 8. At different phases, the variable step perturbation method and the fuzzy control method are used to track the MPP accurately so as to avoid the misjudgment when the light is not uniformly changing. Consequently, the tracking accuracy is improved under a steady state. The maximum power point tracking model of PV system is built on the Matlab platform, and then the static and dynamic properties are simulated. The simulation results show that the proposed strategy exhibits satisfactory static property and excellent dynamic performance in the successful track of MPP.
出处
《可再生能源》
CAS
北大核心
2018年第1期8-14,共7页
Renewable Energy Resources
基金
山西省2014年回国留学人员科技活动择优资助项目
山西省青年自然科学基金项目(201701D221240)
关键词
光伏系统
最大功率点跟踪
β参数
变步长扰动观察法
模糊控制法
photovohaic system
maximum power perturbation observation method
fuzzy control method point tracking
β -parameter
variable step
