Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2002.07b
- /
- Pages.1313-1315
- /
- 2002
High-Frequency DC Link Inverter for Grid-Connected Photovoltaic System
고주파링크방식을 이용한 PV용 PCS의 고찰
- Jung, Young-Seok (Korea Institute of Energy Research) ;
-
Yu, Gwon-Jong
(Korea Institute of Energy Research)
;
- Jung, Myoung-Woong (Korea Institute of Energy Research) ;
- Choi, Jae-Ho (Chungbuk National Univ.) ;
-
Choi, Ju-Yeop
(Kwangwoon Univ.)
- Published : 2002.07.10
Abstract
This paper proposes an inverter for the grid-connected photovoltaic system based on the transformer-less inverter. This system consists of a high frequency inverter bridge, high frequency transformer, diode bridge rectifiers, a DC filter, a low frequency inverter bridge, and an AD filter. The high frequency inverter bridge switching at 20kHz is used to generate bipolar PWM pulse, which is subsequently rectified by diode bridge rectifiers to result in a full-wave rectified sine wave. Finally, it is unfolded by a low frequency inverter bridge to result in a 60Hz sine wave power output. In this paper, the control algorithm for synchronous current feedback control method and a maximum power point tracking (MPPT) method using DSP are described. And, the simulation and experimental results are shown to verify the validity of the proposed system.
Keywords