基于改进模糊法的分布式风光互补发电系统MPPT控制  

MPPT control based on improved fuzzy method for distributed hybrid wind-solar power generating systems

作　　者：刘立群[1,2] 王志新[1] 顾临峰[3] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]太原科技大学电子信息工程学院,山西太原030024 [3]上海市电力公司沪南分公司,上海200003

出　　处：《电力系统保护与控制》2011年第15期70-74,79,共6页Power System Protection and Control

基　　金：国家自然科学基金重点项目(60934005);上海市科技发展基金(09195802900);上海市教育发展基金(09LM37);山西省青年科技研究基金(2009021020;2011021014-2);山西省高等学校科技研究开发项目(2010016)~~

摘　　要：风光互补发电系统的输出特性受到风速随机非线性、不确定性,太阳照射强度的时变不确定性和经常被部分遮蔽等的影响,一种高效的最大功率跟踪控制方法对于提高分布式风光互补发电系统的供电可靠性和电能质量具有实用意义。针对风电机组,采用模糊MPPT控制方法;针对光伏发电部分,采用模糊PWM扰动的MPPT控制方法,提高了系统在部分遮蔽状况的灵敏度和输出效率,进而实现了风光互补系统的MPPT控制。设计了基于改进模糊法的MPPT控制策略的控制器,并进行了实验验证,实际运行实验结果表明,基于改进模糊法的分布式风光互补发电系统的供电可靠性、输出特性和动态特性显著改善,输出效率提高。The output characteristics of hybrid wind-solar generating system are affected by the wind speed stochastic nonlinearity and uncertainty,time-varying and uncertainty of irradiation,being partially shaded for solar cell,and so on.An efficient Maximum Power Point Tracking （MPPT）control method is helpful to improve the power supply reliability and power quality of hybrid wind-solar generating system.The fuzzy MPPT method is used in wind power unit;the fuzzy Perturb Pulse-Width Modulation（PWM）MPPT method is used in photovoltaic part,which improves the sensitivity and output efficiency of system under conditions of being partially MPPT shaded,and thus implements the MPPT control of hybrid wind-solar system.Then the controller is designed based on the improved fuzzy MPPT control strategy and then verified by experiment.Experimental results and site operations show that the power supply reliability,output characteristic,dynamic characteristic and output efficiency are significantly improved.

关 键 词：风光互补系统 最大功率跟踪 部分遮蔽 模糊逻辑 扰动观察 

分 类 号：TM614[电气工程—电力系统及自动化]