摘要
光伏阵列的输出功率随外部环境(光照强度、环境温度)和负载的变化而变化,为充分发挥光伏器件的效能,需采用有效率的最大功率点跟踪方法。在分析光伏系统中最大功率点跟踪的问题之后,为了能够进一步提高光伏发电系统的效率和系统的稳定性,提出了一种基于模糊逻辑的双环控制的最大功率点跟踪的方法,在以往模糊控制环节的基础上再加入一个内环的模糊控制,搭建了光伏发电系统的仿真模型,通过验证表明双环模糊控制法比传统方法有更高的效率和更高的精度,并且能有效地减小系统功率损耗,且具有能同时兼顾跟踪精度和响应速度的优点。研究对比之后证实此种方法提高了系统的输出功率,保持了系统稳定,提高光伏系统MPPT控制的鲁棒性和精确性。
The output power of photovoltaic cells changes with the extmal environment（light intensity,ambient temperature）and load ,It is necessary to track the maximum power point of solar cell array rapidly and accurately to improve the utlization efficiency of solar cell array.In order to further improve the efficiency of photovoltaic power generation system,a method based on fuzzy logic dual-loop control of the maximum power point tracking of photovoltaic power generation system was presented,which added an inner loop of the fuzzy control based on the former fuzzy control.The simulation verifies that the double -loop fuzzy control method is more efficient and can effectively eliminate the oscillations around the maximum power point.The results show that this maximum power point tracking algorithm can track the maximum power point of photovoltaic power generation system rapidly and accurately and can improve the static and dynamic performance of the photovoltaic power system.
出处
《电源技术》
CAS
CSCD
北大核心
2012年第9期1357-1360,共4页
Chinese Journal of Power Sources
关键词
光伏发电
最大功率跟踪
模糊逻辑
双环控制
photovoltaic power,maximum power point tracking
fuzzy logic,double loop control
