新型Cuk电路及其在光伏系统中的应用  

Novel Cuk Circuit and its Application in Photovoltaic System

作　　者：王锋[1] 张淼[1] 胡小明[1] 黄先伟[1] 

机构地区：[1]广东工业大学,广东广州510090

出　　处：《电力电子技术》2009年第5期26-28,共3页Power Electronics

基　　金：国家自然科学基金重点项目(60534040);广东省教育厅专项重点实验室(IDSYS200701)~~

摘　　要：虽然Cuk变换器传输效率较高,但因其高频化所产生的开关损耗和电磁干扰(Electromagnetic Interference,简称EMI)等问题不容忽视。在对隔离式Cuk电路进行理论分析的基础上,构建了带零电压开通软开关隔离式Cuk电路的硬件电路。研究了在不同占空比、开关频率和负载条件下该电路的传输效率,并根据光伏电池的特性将该电路应用于光伏发电的最大功率追踪(Maximum Power Point Tracking,简称MPPT)系统。实验结果证明了软开关在提高Cuk电路传输效率方面的作用及其在光伏系统应用中的优势。Cuk convener has high transmission efficiency, but the problem of switching losses and electromagnetic interference（EMI） because of high frequency can＇t be neglected.This paper constructs the hardware circuit of isolated Cuk circuit with zero-voltage-turn on soft switch base on theoretical analysis,and researchs its transmission efficiency under different duty cycle, switching frequency and loads, also this circuit is applied to photovoltaic maximum power point tracking （MPPT） system according to the characteristics of photovohaic cells.The experimental results prove that soft switeh＇s effect can improve transmission efficiency of Cuk circuit and its application advantage at photovohaic system.

关 键 词：变换器 效率/软开关 最大功率追踪 

分 类 号：TM46[电气工程—电器] TM914.4