New design for photovoltaic systems

Author

Domínguez, J.A. ; Lorenzo, S. ; de Pablo, S. ; Cáceres, S.

Author_Institution

Dept. de Technol. Electron., Valladolid Univ., Spain

Volume

2

fYear

1998

fDate

17-22 May 1998

Firstpage

1388

Abstract

Generally, photovoltaic (PV) systems have two independent controls: (1) DC control for the DC/DC converter to track the maximum power point of the PV array; and (2) AC control for the DC/AC converter to feed, efficiently, the load attached to it. This paper shows how to design a global control, using vector control (field orientation in an AC engine), avoiding use of the DC/DC converter, and finding the relationships among the DC magnitudes and AC ones. So, only the inverter is necessary to control the PV array and the AC load. Two cases are considered: pumping with an asynchronous machine and connecting to the grid systems. One 10 kW prototype has been built to validate the theory. It has been successfully tested in a laboratory. The total system has was finished and installed in February 1998, first results will be available at the end of 1998

Keywords

DC-AC power convertors; induction motors; machine control; magnetic flux; magnetic variables control; photovoltaic power systems; power system control; pumps; voltage control; 10 kW; AC control; AC magnitudes; DC control; DC magnitudes; DC voltage control; DC/AC converter; DC/DC converter; PV array; asynchronous machine pumping; field orientation; flux control; grid system connection; maximum power point tracking; photovoltaic systems design; vector control; Analog-digital conversion; Control systems; DC-DC power converters; Engines; Feeds; Inverters; Machine vector control; Photovoltaic systems; Pumps; Solar power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE

Conference_Location

Fukuoka

ISSN

0275-9306

Print_ISBN

0-7803-4489-8

Type

conf

DOI

10.1109/PESC.1998.703219

Filename

703219