A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems

Morcos Metry, Mohammad B. Shadmand, Robert Balog, Haitham Abu-Rub

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Variability of the solar energy resources requires highly effective maximum power point tracking (MPPT) to ensure maximum energy harvesting from the photovoltaic (PV) modules. To accomplish this, a MPPT controller typically requires accurate knowledge of the voltage and current from the PV module, and must converge quickly with minimal hunting around the maximum power point (MPP). Conventional MPPT techniques use fixed step-size perturbation which need to be optimized for one of two objectives: reducing the convergence settling time, or reducing the steady state ripple. Also, the required sensors increase system cost and can cause reliability issues, particularly for the current sensors which can exhibit thermal drift and degrade over time. This paper presents a highly efficient, variable-step sensorless current MPPT controller using an observer-based model derived from the principles of model predictive control (MPC) to adaptively determine the perturbation step-size. The proposed variable step, sensorless current, model predictive control maximum power point tracking (VS-SC-MPC-MPPT) continuously adjusts the perturbation step size using the predicted dynamic model to enable fast convergence and small limit cycle, without the need of expensive measuring devices. The performance of the VS-SC-MPC-MPPT in this paper is compared to previously developed MPC-MPPT methods. The provided investigation aims to demonstrate higher system efficacy with lower cost. The feasibility of the proposed controller is verified though computer simulation and real time simulation using dSPACE DS1007.

Original languageEnglish
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
DOIs
Publication statusPublished - 13 Feb 2017
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: 18 Sep 201622 Sep 2016

Other

Other2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
CountryUnited States
CityMilwaukee
Period18/9/1622/9/16

Fingerprint

Photovoltaic System
Variable Step Size
Model predictive control
Model Predictive Control
Controllers
Energy harvesting
Sensors
Energy resources
Perturbation
Controller
Solar energy
Costs
Dynamic models
Real-time Simulation
Module
Sensor
Solar Energy
Energy Harvesting
Convergence Time
D-space

Keywords

  • Maximum Power Point Tracking
  • Model Predictive Control
  • Photovoltaics
  • Robust Controller
  • Sensorless Current Mode

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Control and Optimization

Cite this

Metry, M., Shadmand, M. B., Balog, R., & Abu-Rub, H. (2017). A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems. In ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings [7854805] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2016.7854805

A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems. / Metry, Morcos; Shadmand, Mohammad B.; Balog, Robert; Abu-Rub, Haitham.

ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. 7854805.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metry, M, Shadmand, MB, Balog, R & Abu-Rub, H 2017, A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems. in ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings., 7854805, Institute of Electrical and Electronics Engineers Inc., 2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016, Milwaukee, United States, 18/9/16. https://doi.org/10.1109/ECCE.2016.7854805
Metry M, Shadmand MB, Balog R, Abu-Rub H. A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems. In ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2017. 7854805 https://doi.org/10.1109/ECCE.2016.7854805
Metry, Morcos ; Shadmand, Mohammad B. ; Balog, Robert ; Abu-Rub, Haitham. / A variable step-size MPPT for sensorless current model predictive control for photovoltaic systems. ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017.
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