局部遮挡状态下光伏发电系统MPPT变论域模糊控制  

Variable universe fuzzy control for MPPT control in PV system under partially shaded conditions

作　　者：贺继胜 杨俊华[1] 苏梅芬 陈思哲[1] 杨梦丽[2] 吴捷[3] 

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]河南省电力公司检修公司,河南郑州450052 [3]华南理工大学电力学院,广东广州510641

出　　处：《可再生能源》2013年第11期132-136,共5页Renewable Energy Resources

基　　金：国家自然科学基金项目(60904078);广东省教育厅专项重点实验室(IDSYS200701);广东高校优秀青年创新人才培养计划项目(2012LYM_0052);广东省绿色能源技术重点实验室开放基金项目(2012003)

摘　　要：基于光伏电池部分遮挡时P-U特性曲线,提出一种全局MPPT变论域模糊控制算法。通过增量法确定伸缩因子,实时改变模糊控制器输入、输出量的论域,扫描系统在各状态下的P-U特性曲线,得到buck电路PWM调制信号,快速准确地实现光伏阵列全局MPPT控制。通过PSCAD/EMTDC搭建的模型仿真表明,所提出的方法能快速应对外界环境变化,有效地实现全局最大功率跟踪,具有良好的动态性能和稳态精度。Based on P-V characteristic curves in the partially shaded condition, a novel variable universe fuzzy control algorithm for global maximum power point （MPP） tracking control in PV system was proposed. The variable universe fuzzy controller could in real time change the size of membership function of the inputs and outputs of the controller with the contraction-expansion factor by the incremental method. The PWM input signals of the buck circuit were generated to track global MPP in PV arrays fast and accurately by scanning P-V characteristic curves in each state. The simulation results of the model built by PSCAD/EMTDC show that the proposed method could respond to the external environmental change quickly and accurately and track global MPP with better dynamic performance and high steady accuracy.

关 键 词：光伏电池 局部遮挡 最大功率跟踪 变论域 模糊控制 光伏并网 

分 类 号：TM615[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]