Title :
A DC-link voltage control scheme for single-phase grid-connected PV inverters
Author :
He, Fanbo ; Zhao, Zhengming ; Yuan, Liqiang ; Lu, Sizhao
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
A fast DC-link voltage controller is desirable to reduce the DC-link capacitor for PV inverters. This paper proposes a method for single-phase grid-connected PV inverters to remove the ripple component from the DC-link voltage signal and a scheme to regulate the DC-link voltage based on energy-balance analysis. The proposed scheme provides excellent dynamic performance as well as a function to prevent DC-link overvoltage by limiting the input power, which is verified by both simulation and experiments.
Keywords :
invertors; photovoltaic power systems; power grids; voltage control; DC-link capacitor; dynamic performance; energy-balance analysis; fast DC-link voltage control scheme; single-phase grid-connected PV inverters; Arrays; Frequency control; Inverters; Pi control; Power harmonic filters; Pulse width modulation; Voltage control;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4577-0542-7
DOI :
10.1109/ECCE.2011.6064305
