An improved adaptive perturb & observe maximum power point tracking technique

Shunlong Xiao, Robert Balog

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

4 Citations (Scopus)

Abstract

To increase the energy harvest of photovoltaic (PV) module, a converter/inverter with maximum power point tracking (MPPT) is needed as the interface between the PV array and the load. The purpose is to adjust the effective load resistance presented to the PV modules so that the system operates at the maximum power point (MPP). As such, two requirements must be met by an effective MPPT controller: First, converge to the MPP quickly especially during dynamic weather conditions; second, exhibit small oscillation around the MPP under steady state. Knowing that oscillation will adversely affect the system stability and continuous power generation, many MPPT propose to adaptive change the variation step according to the power variation. For example, a second PI controller is implemented before the MPPT controller to minimize the perturbation size. These methods still do not suppress the steady sate oscillations around MPP effectively. As such, this paper proposed an improved adaptive MPPT technique by adding a steady state MPP determination algorithm after the adaptive perturb & observe method, which helps harness more renewable energy with reliable and high-efficiency tracking capability. The method is also independent with the environmental conditions and has smaller oscillation around the MPP compared to other adaptive P&O methods proposed. The proposed method is verified by both simulations and experiments under different irradiance levels and dynamic weather conditions.

Original languageEnglish
Title of host publication2018 IEEE Texas Power and Energy Conference, TPEC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
Volume2018-February
ISBN (Electronic)9781538610060
DOIs
Publication statusPublished - 9 Mar 2018
Event2nd IEEE Texas Power and Energy Conference, TPEC 2018 - College Station, United States
Duration: 8 Feb 20189 Feb 2018

Other

Other2nd IEEE Texas Power and Energy Conference, TPEC 2018
CountryUnited States
CityCollege Station
Period8/2/189/2/18

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Keywords

  • adaptive method
  • maximum power point tracking (MPPT)
  • perturb & observe technique
  • photovoltaic (PV)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering

Cite this

Xiao, S., & Balog, R. (2018). An improved adaptive perturb & observe maximum power point tracking technique. In 2018 IEEE Texas Power and Energy Conference, TPEC 2018 (Vol. 2018-February, pp. 1-6). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/TPEC.2018.8312066