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中文摘要：
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。
英文摘要：
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.
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