摘要
传统的电压型逆变器只能实现降压逆变,且使用电解电容,体积大、可靠性低,应用于新能源发电系统等领域时具有很大的局限性。提出一种新型无电解电容的单级非隔离逆变器拓扑,该逆变器由2个改进型Zeta电路组合而成,所含开关器件及无源器件数量较少,以容值较小的非电解电容作为中间储能元件,具有体积小、可靠性高、使用寿命长的优点。分析新型逆变器的工作原理,推导得出中间储能电容电压公式及逆变器增益;建立该逆变器数学模型,设计闭环调节器,并进行仿真验证;在理论分析和仿真实验的基础上,对新型无电解电容的单级Zeta逆变器搭建实验样机,实验结果证明,该逆变器具有良好的动静态性能。
The traditional voltage source inverter can only operate in buck operation, it uses the electrolytic capacitor, which leads to the large size and low reliability, and has limitations when applied to renewable energy power generation systems. This paper proposed a new type of single-stage non-isolated inverter topology without electrolytic capacitor. The inverter is composed of two modified Zeta circuits. The number of switching devices and passive components is small, and the non-electrolytic capacitor with small capacitance is used as the intermediate energy storage component, which has the advantages of small volume, high reliability and long service life. This paper analyzed the working principle of the new inverter, derived the intermediate storage capacitor voltage and the gain of the inverter. The mathematical model of the inverter was established, and the closed-loop regulator was designed and verified by simulation. Based on theoretical analysis and simulation experiments, the experimental prototype of a single-stage Zeta inverter with non-electrolytic capacitor was built. The experimental results show that the inverter has good dynamic and static performance.
作者
王立乔
李占一
杨彬
WANG Liqiao;LI Zhanyi;YANG Bin(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province (Yanshan University),Qinhuangdao 066004, Hebei Province, China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第14期4221-4230,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51677162)
河北省自然科学基金项目(E2017203235)~~
关键词
可再生能源发电
无电解电容
Zeta变换器
升降压
闭环控制
renewable energy power generation
non-electrolytic capacitor
Zeta converter
Buck-Boost
close loop control
