适应局部阴影条件的单电压采样MPPT技术  

SINGLE VOLTAGE SAMPLING MPPT TECHNOLOGY ADAPTED TO LOCAL SHADOW CONDITION

作　　者：李锐[1] 李小谦[1] 邓磊[1] 姚川[1] 刘邦银 Li Rui;Li Xiaoqian;Deng Lei;Yao Chuan;Liu Bangyin(Wuhan Second Ship Design and Research Institute,Wuhan 430000,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Wuhan 430000,China)

机构地区：[1]武汉第二船舶设计研究所,武汉430000 [2]强电磁工程与新技术国家重点实验室,武汉430000

出　　处：《太阳能学报》2018年第8期2357-2364,共8页Acta Energiae Solaris Sinica

基　　金：青年科学基金(51507120)

摘　　要：分析母线电压崩溃现象,根据母线电压失稳与最大功率匹配之间的对应关系,提出只需直流电压采样的MPPT算法。该算法通过判断母线电压是否迅速跌落来鉴别最大功率点,具有实现简单、抗干扰能力强、适应局部阴影条件等优势。最后在自行研制的一套630 k W光伏并网逆变系统上验证该算法的有效性和优越性。When the PV system is operated on the left side of the maximum power point（MPP）,low damping characteristics appear,making the inverter susceptible to oscillation and even instability.When the single-stage grid-connected PV inverter system operates on the left side of the MPP,bus voltage collapse occurs.The bus voltage collapse phenomenon is analyzed,and an MPPT algorithm that requires only DC voltage sampling is proposed according to the relationship between bus voltage instability and maximum power matching.The algorithm identifies the maximum power point by determining whether the bus voltage falls rapidly,has the advantages of simple implementation,strong anti-interference ability,and adaptability to local shadow conditions.Finally,a self-developed 630 k W PV grid-connected inverter system is used to verify the effectiveness and superiority of the algorithm.

关 键 词：光伏系统 最大功率追踪 并网逆变器 稳定性 局部阴影 

分 类 号：TM615[电气工程—电力系统及自动化]