Implementation of dithering digital ripple correlation control for PV maximum power point tracking

Author

Barth, C. ; Pilawa-Podgurski, Robert Carl Nikolai

Author_Institution

Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA

fYear

2013

fDate

23-26 June 2013

Firstpage

1

Lastpage

7

Abstract

This work demonstrates a method for rapid maximum power point tracking in photovoltaic applications using dithered PWM control. Constraints imposed by power consumption, cost and component size, limit the available PWM resolution of a power converter, and may in turn limit the MPP tracking efficiency of the PV system. PWM dithering can be used to improve average PWM resolution. However, additional tracking delays are also introduced. By applying digital dithering ripple correlation control to the ripple caused by PWM dithering it is possible to achieve high tracking speed in addition to high PWM resolution. We present a theoretical derivation of the principles behind DDRCC, as well as experimental results that show excellent tracking speed and accuracy with basic hardware requirements.

Keywords

correlation methods; maximum power point trackers; photovoltaic power systems; DDRCC; MPP tracking efficiency; PV maximum power point tracking; average PWM resolution; basic hardware requirements; component size; cost size; dithered PWM control; dithering digital ripple correlation control; photovoltaic applications; power consumption; power converter; tracking accuracy; tracking speed; Current measurement; Hardware; Maximum power point trackers; Microcontrollers; Pulse width modulation; Signal resolution; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Modeling for Power Electronics (COMPEL), 2013 IEEE 14th Workshop on

Conference_Location

Salt Lake City, UT

ISSN

1093-5142

Print_ISBN

978-1-4673-4914-7

Type

conf

DOI

10.1109/COMPEL.2013.6626397

Filename

6626397