摘要
提出了一种用于光伏逆变器的新型功率解耦电路。其中,两个解耦电容的电压叠加起来以提供直流母线电压,一个双向Buck/Boost变换器连接在两个解耦电容之间,使得能量可以在两个解耦电容之间双向传递。本文对新型功率解耦电路的工作原理进行了详细分析,给出了解耦电容的参数设计,解耦电路的控制策略以及功率解耦电容平均电压的控制方法。利用Saber软件对所提出的功率解耦电路进行仿真研究。仿真结果表明所提出的功率解耦电路及其控制策略可以在实现功率解耦功能的同时降低解耦电容的容量和耐压。
This paper presents a new power decoupling circuit for PV inverter. In this circuit, two decoupling capacitors are connected in series to provide the dc bus voltage. And a buck/boost inverter is connected between the capacitors in order to achieve two directional energy transfer between them. The operation principles of the power deeoupling circuit are analyzed in details. The parameter design of the decoupling capacitances, the control strategy, and the average voltage control method of the power decoupling capacitors are given. Simulation analysis of the proposed power decoupling circuit was performed with Saber software. Simulation results show that the proposed power decoupling circuit and its control strategy can realize the power decoupling while reducing the decoupling capacitors' capacitance and voltage rating.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第16期42-48,共7页
Transactions of China Electrotechnical Society
关键词
功率解耦
单相逆变器
光伏
SABER仿真
Power decoupling, single phase inverter, photovoltaic(PV), Saber simulation