一种单级非隔离型Cuk光伏逆变器研究  

RESEARCH ON A SINGLE-STAGE NON-ISOLATED Cuk PHOTOVOLTAIC INVERTER

作　　者：岳舟 陈新 Yue Zhou;Chen Xin(College of Energy,Mechanical and Electrical Engineering,Hunan University of Humanities,Science and Technology,Loudi 417000,China)

机构地区：[1]湖南人文科技学院能源与机电工程学院

出　　处：《太阳能学报》2019年第11期3103-3109,共7页Acta Energiae Solaris Sinica

基　　金：湖南省自科基金（2016JJ4043)

摘　　要：针对传统电压型逆变器的缺点,结合组合式逆变器的构造方法,提出一种可实现升降压逆变的单级非隔离型Cuk光伏逆变器。首先介绍单级非隔离型Cuk光伏逆变器的拓扑结构和工作原理,阐述系统参数的设计,然后分析非线性PWM调制方式和电压闭环控制策略,最后通过仿真和样机试验证明该拓扑结构的正确性及控制方法的可行性。仿真和试验结果表明单级非隔离型Cuk光伏逆变器具有较宽的输入电压变化范围,同时对输入电压和负载的扰动具有较强抑制作用,因此具有较重要的研究意义。With the rapid development of the new energy industries,high-performance grid-connected inverter is attracted more and more attention. However,the traditional step-down voltage-source-inverter(VSI)is not suitable for photovoltaic system with a wide range of DC input voltage. Firstly,aiming at the shortcomings of the traditional VSI,this paper combined with combined inverter structure method,presents a novel single-stage non-isolated Cuk photovoltaic inverter,whose output voltage could higher or lower than the input voltage. Firstly,the article introduces single-stage non-isolated Cuk photovoltaic inverter topology structure and working principle. At the same time,it expounds the design of the system parameters. Then it analysis the nonlinear PWM modulation mode and voltage closed loop control strategy.Finally,it adopts simulation and prototype test proving the correctness of topology and control method is feasible.Simulation and experimental results show that the single-stage non-isolated Cuk photovoltaic inverter has wide input voltage range,and the input voltage and load disturbance with strong inhibition. Therefore,it has important research significance.

关 键 词：CUK变换器 单级非隔离型逆变器 非线性PWM 电压闭环控制 

分 类 号：TM615[电气工程—电力系统及自动化]