University of Illinois Urbana-Champaign

Dithering Digital Ripple Correlation Control for Photovoltaic Maximum Power Point Tracking

Barth, Christopher

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https://hdl.handle.net/2142/46474

Description

Title
Dithering Digital Ripple Correlation Control for Photovoltaic Maximum Power Point Tracking
Author(s)
Barth, Christopher
Contributor(s)
Pilawa-Podgurski, Robert
Issue Date
2012-12
Keyword(s)
  • photovoltaic devices
  • maximum power point tracking
  • power converters
  • ripple correlation control
  • dithering digital ripple correlation control
Abstract
This work develops and simulates a new maximum power point tracking algorithm for use in switching power converters for photovoltaic applications. Building upon previous work in ripple correlation control (RCC), an average-based RCC approach is introduced which makes use of quasi-steady state converter operation to drive the converter duty radio to the optimal value. Dithering Digital Ripple Correlation Control (DDRCC) uses routine transitions in the converter duty cycle to generate small, sustained perturbation in the system. By sampling data at two selected times during each perturbation cycle, the converter is able to converge to the maximum power point of the PV array. Adjusting the timing of transitions in the duty ratio also allows the power converter to obtain high effective PWM resolution for more precise tracking of the maximum power point.
Type of Resource
text
Language
en
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http://hdl.handle.net/2142/46474

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