基于模糊控制单相光伏并网系统的设计  

Fuzzy control-based design of single-phase grid-connected photovoltaic power system

作　　者：方清城[1] 李先祥[1] 

机构地区：[1]佛山科学技术学院自动化系,广东佛山528000

出　　处：《佛山科学技术学院学报（自然科学版）》2011年第5期20-24,共5页Journal of Foshan University(Natural Science Edition)

基　　金：佛山市科技发展专项资金资助项目(FZ2010034)

摘　　要：阐述了单相光伏并网系统主电路的组成及控制系统的设计。针对光伏电池非线性强的缺点,将模糊控制方法应用到光伏系统的M PPT控制,实现系统快速响应外部环境变化。同时,逆变系统采用电压外环-电流内环的双闭环控制策略,能控制输出电流波形,提高系统动态响应速度,实现电流的快速检测,抑制电网电压扰动,确保逆变器输出功率因数趋于1。实验结果验证了设计的合理性和正确性。The components of main circuit of single-phase photovoltaic grid-connected system are discussed and the control system is designed.Considering the strong non-linearity of photovoltaic cells,fuzzy control method is introduced for MPPT of the photovoltaic generation system.The system responds rapidly by using fuzzy control method when the external environment changes quickly.The outer ring voltage-current inner ring of the double-loop control strategy is used to realize the control of the current waveform for the photovoltaic inverter system.The system can run with good dynamic performance and inhibit perturbation of grid voltage.The output power factor of the photovoltaic inverter is close to 1 by the double-loop control strategy.The experimental results prove the rationality and correctness of the design.

关 键 词：光伏并网系统 逆变器 模糊控制 MPPT 

分 类 号：TM615.2[电气工程—电力系统及自动化]