Ultracapacitor storage enabled global MPPT for photovoltaic central inverters

Nicolas Muller, Hugues Renaudineau, Freddy Flores-Bahamonde, Samir Kouro, Patrick Wheeler

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

8 Citations (Scopus)


In most large-scale grid-tied photovoltaic (PV) plants, central inverter configurations are used, mainly due to higher converter efficiency and lower cost per kW. However, compared to other configurations, its Maximum Power Point Tracking (MPPT) efficiency is the lowest since it is the less distributed configuration. Under non-uniform conditions, as mismatch caused by aging and/or partial shading, several local maxima may arise in the PV curve, hence requiring additional actions to maximize the output power of the PV plant. Moreover, tighter grid codes have appeared, requiring for PV systems to limit power fluctuations. This paper presents an alternative to perform Global MPPT (GMPPT) while complying with stiffer grid code limitations. The proposed alternative adds an Energy Storage System (ESS) at inverter level, consisting of an ultracapacitor (UC) bank connected to the DC-link of a PV central inverter through interleaved DC-DC power converters. The proposed configuration is preliminary validated through simulations and tested under extreme conditions. The performance of the system is analyzed and compared to other existing solutions.

Original languageEnglish
Title of host publicationProceedings - 2017 IEEE International Symposium on Industrial Electronics, ISIE 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781509014125
Publication statusPublished - 3 Aug 2017
Externally publishedYes
Event26th IEEE International Symposium on Industrial Electronics, ISIE 2017 - Edinburgh, Scotland, United Kingdom
Duration: 18 Jun 201721 Jun 2017

Publication series

NameIEEE International Symposium on Industrial Electronics


Conference26th IEEE International Symposium on Industrial Electronics, ISIE 2017
Country/TerritoryUnited Kingdom
CityEdinburgh, Scotland

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering


Dive into the research topics of 'Ultracapacitor storage enabled global MPPT for photovoltaic central inverters'. Together they form a unique fingerprint.

Cite this