Title :
A 3ϕ3W Half-Bridge Single-Stage Grid-Connection PV Power Inverter with Direct-Source-Current-Shaping Algorithm to Improve Power Factor
Author :
Shen, C.-L. ; Wang, J.-Y.
Author_Institution :
Dept. of Electr. Eng., Nan-Jeon Inst. of Technol., Tainan
Abstract :
In this paper a three-phase three-wire (3ϕ3W) half-bridge single-stage grid-connection PV power inverter is proposed. The inverter system can not only transfer solar power into ac power to supply loads or/and to feed utility but eliminates current harmonics and improves power factor. As compared with conventional PV inverter, the total number of active switches and current sensors in the power stage can be reduced so that its cost is lowered significantly. For controlling, the direct-source-current-shaping (DSCS) algorithm and the linear-approximation method for maximum-power-point tracking (MPPT) are applied to determine optimal current command to avoid complicated calculation. Simulation results and practical measurements demonstrate the feasibility of the proposed single-stage grid-connection inverter system
Keywords :
approximation theory; invertors; photovoltaic power systems; power factor; power grids; 3ϕ3W half-bridge photovoltaic system; DSCS algorithm; MPPT; direct-source-current-shaping; linear-approximation method; maximum-power-point tracking; power factor; single-stage grid-connection inverter system; Control systems; Costs; Feeds; Inverters; Power harmonic filters; Power supplies; Power system harmonics; Reactive power; Solar energy; Switches; Grid connection; PV power inverter; current harmonics; power factor;
Conference_Titel :
TENCON 2006. 2006 IEEE Region 10 Conference
Conference_Location :
Hong Kong
Print_ISBN :
1-4244-0548-3
Electronic_ISBN :
1-4244-0549-1
DOI :
10.1109/TENCON.2006.343969
