A transformer-less inverter using buck-boost type chopper circuit for photovoltaic power system

Author

Kasa, Nobuyuki ; Ogawa, Haruki ; Iida, Takahiko ; Iwamoto, Hideo

Author_Institution

Okayama Univ. of Sci., Japan

Volume

2

fYear

1999

fDate

1999

Firstpage

653

Abstract

This paper presents a newly developed transformer-less single phase inverter for a photovoltaic (PV) power system. The proposed system consists of two sets of PV array and buck-boost type chopper circuit. However, the system has lower “using rate” of PV energy than that of the ordinary PV system, as each PV array is only operated in the half duration of the AC power frequency. In this paper, it is also discussed how to increase this “using rate” by varying the connected capacitor between PV array terminals. The simulation and experimental data show that the proposed inverter can supply the AC power to a utility grid line with the power factor nearly unity

Keywords

capacitors; choppers (circuits); insulated gate bipolar transistors; invertors; photovoltaic power systems; power factor; solar cell arrays; AC power frequency; IGBT; PV array; PV energy utilisation rate; buck-boost type chopper circuit; connected capacitor; near unity power factor; photovoltaic power system; single phase inverter; transformer-less inverter; utility grid line; Capacitors; Choppers; Circuits; Frequency; Inductors; Insulated gate bipolar transistors; Inverters; Photovoltaic systems; Power system simulation; Solar power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on

Print_ISBN

0-7803-5769-8

Type

conf

DOI

10.1109/PEDS.1999.792757

Filename

792757