一种无电解电容单级Buck-Boost逆变器  

A Single-Stage Buck-Boost Inverter with Non-Electrolytic Capacitor

作　　者：王立乔[1] 李占一 刘乐 黄海文 Wang Liqiao;Li Zhanyi;Liu Le;Huang Haiwen(Key Laboratory of Power Electronics for Energy Conservation and Drive Control of Hebei Province Yanshan University,Qinhuangdao,066004,China;State Grid Jibei Electric Power Company Supply Branch of Funing District,Qinhuangdao,066300,China)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004 [2]国网冀北电力有限公司秦皇岛市抚宁区供电分公司,秦皇岛066300

出　　处：《电工技术学报》2019年第20期4295-4305,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51677162);河北省自然科学基金(E2017203235)资助项目

摘　　要：针对中小功率光伏发电系统中电压源型逆变器不能升降压运行、直流侧需要大容量电解电容的问题,提出一种新型无电解电容单级Buck-Boost逆变器。该逆变器具有升降压能力,不仅电路本身不含电解电容,而且其抵抗输入侧低频脉动的能力强,有利于减小输入侧滤波电容值,从而实现整个系统无电解电容化。该逆变器具有成本低、使用寿命长、可靠性高、短路及断路保护简单等优点,符合中小功率光伏发电系统的要求。该文首先介绍该逆变器的工作原理,然后建立其数学模型,并设计闭环调节器。在理论分析的基础上,进行仿真和实验验证,仿真和实验结果证明了理论分析的正确性。Since the voltage source inverter used in the medium and low-power photovoltaic power generation systems cannot operate in Buck-Boost operation and the high-capacity electrolytic capacitors are required in DC side,a novel non-electrolytic capacitor single-stage Buck-Boost inverter is proposed.This inverter has buck-boost capability and strong resistance to low-frequency pulsation on the input side,which helps to reduce the value of the input side filter capacitor,thereby realizing the entire system without electrolytic capacitor.The inverter has the advantages of low cost,long life,high reliability,and simple short circuit and open circuit protection,which is suitable for the medium and low-power photovoltaic power generation systems.In this paper,the operation principle of the inverter is introduced,its mathematical model is deduced,and the parameter design is performed.Based on the theoretical analysis,the simulation and experimental verification are performed.The results prove the correctness of the theoretical analysis.

关 键 词：单级 BUCK-BOOST 逆变器 宽电压范围 无电解电容 中小功率光伏系统 

分 类 号：TM464[电气工程—电器]