Modified approach for global MPP finding under partial shading

Asher Yahalom, Tatiana Minav, Moshe Averbukh

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Today, despite the presence of well-developed and high efficient Maximum Power Point Trackers (MPPT) in all PV stations, remains the problem of their proper functionality during partial shading. Existing MPPT algorithms use sequential search procedures, therefore, they may falsely operate during partial shading. The reason of this obstacle is numerous local maximums appearing in the P-I or P-V characteristic curves. This impedes conventional MPPT systems to find the global maximum (GM) and significantly restricts the ultimate electric output of PV plants.The present article proposes the improved algorithm for MPPT functionality. The method based on a photo-current estimation of each PV panel. Owing this information, submitted algorithm provides permanent assessment of the upper and the low limits of regulating parameter (a current or a voltage) between which its optimal value that ensures GM is located. Further, conventional MPPT entering the work can easily find the nearest maximum that obviously is GM.Present work describes this new method to find more accurate and fast estimations of the GM boundaries and to keep GM even during fast changings partial shading conditions, which will cause the higher overall efficiency of MPPT.
Original languageEnglish
Title of host publicationICSEE 2018 : International Conference on the Science of Electrical Engineering
PublisherIEEE
Number of pages5
ISBN (Electronic)978-1-5386-6378-3
DOIs
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication
Event International Conference on the Science of Electrical Engineering - Eilat, Israel
Duration: 12 Dec 201814 Dec 2018

Conference

Conference International Conference on the Science of Electrical Engineering
Abbreviated titleICSEE
Country/TerritoryIsrael
CityEilat
Period12/12/201814/12/2018

Keywords

  • PV solar plant
  • MPPT
  • partial shading
  • permanent modeling
  • global maximum

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