Control of a large scale single-stage grid-connected PV system utilizing MPPT and reactive power capability

Author

Lal, Vivek Nandan ; Siddhardha, Maganti ; Singh, S.N.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Kanpur, Kanpur, India

fYear

2013

fDate

21-25 July 2013

Firstpage

1

Lastpage

5

Abstract

A grid connected, three-phase, single-stage photovoltaic (PV) system has higher efficiency and simple power electronic converter topology compared to two-stage PV system. The control objectives such as maximum power point tracking (MPPT), synchronization with grid, current control, and harmonic reduction in output current are realized in only one-stage. This paper presents a high power, three-phase, single-stage, grid connected PV system with MPPT and reactive power injection capability into the utility grid. For current control, Park´s d-q transformation technique is used by using filtered three-phase grid voltage. A modified voltage controller using feedback linearization scheme with feed forward PV current signal is proposed to regulate the DC-link voltage. Reactive power feeding into the grid is also realized. To perform several simulations, PSCAD/EMTDC software environment is used.

Keywords

electric current control; feedback; linearisation techniques; maximum power point trackers; photovoltaic power systems; power generation control; power grids; reactive power control; voltage control; DC link voltage; MPPT; PSCAD/EMTDC software; Park d-q transformation technique; current control; feed forward PV current signal; feedback linearization scheme; grid connected PV system; harmonic reduction; maximum power point tracking; modified voltage controller; power electronic converter topology; reactive power injection capability; single stage PV system; three phase grid voltage; three phase photovoltaic system; Arrays; Converters; Maximum power point trackers; Phase locked loops; Photovoltaic systems; Reactive power; Voltage control; DC-link voltage control; feedback linearization (FBL); incremental conductance (INC); maximum power point tracking (MPPT); phase locked loop (PLL); photovoltaic (PV); reactive power control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting (PES), 2013 IEEE

Conference_Location

Vancouver, BC

ISSN

1944-9925

Type

conf

DOI

10.1109/PESMG.2013.6672645

Filename

6672645