Open AccessDESIGN AND ANALYSIS OF A GRID-CONNECTED PHOTOVOLTAIC POWER SYSTEM
Author(s) -
J. Kishore Kumar,
V. Lakshmi Devi,
Ch. Rajesh Kumar
Publication year - 2013
Publication title -
international journal of power system operation and energy management
Language(s) - English
Resource type - Journals
ISSN - 2231-4407
DOI - 10.47893/ijpsoem.2013.1066
Subject(s) - photovoltaic system , maximum power point tracking , grid connected photovoltaic power system , compensation (psychology) , boost converter , electronic engineering , voltage , grid , computer science , electrical engineering , engineering , control theory (sociology) , control (management) , inverter , psychology , geometry , mathematics , artificial intelligence , psychoanalysis
A grid-connected photovoltaic (PV) power system with high voltage gain is proposed, and the steady-state model analysis and the control strategy of the system are presented in this paper. For a typical PV array, the output voltage is relatively low, and a high voltage gain is obligatory to realize the grid-connected function. The proposed PV system employs a ZVT-interleaved boost converter with winding-coupled inductors and active-clamp circuits as the first power-processing stage, which can boost a low voltage of the PV array up to a high dc-bus voltage. Two compensation units are added to perform in the system control loops to achieve the low total harmonic distortion and fast dynamic response of the output current. Furthermore, a simple maximum-power-point-tracking method based on power balance is applied in the PV system to reduce the system complexity and cost with a high performance. At last, a 2-kW prototype has been built and tested to verify the theoretical analysis of the paper.