Coordinated active power curtailment of grid connected PV inverters for overvoltage prevention

Reinaldo Tonkoski, Luiz A.C. Lopes, Tarek H.M. El-Fouly

Research output: Contribution to journalArticlepeer-review

684 Scopus citations


Overvoltages in low voltage (LV) feeders with high penetration of photovoltaics (PV) are usually prevented by limiting the feeder's PV capacity to very conservative values, even if the critical periods rarely occur. This paper discusses the use of droop-based active power curtailment techniques for overvoltage prevention in radial LV feeders as a means for increasing the installed PV capacity and energy yield. Two schemes are proposed and tested in a typical 240-V/75-kVA Canadian suburban distribution feeder with 12 houses with roof-top PV systems. In the first scheme, all PV inverters have the same droop coefficients. In the second, the droop coefficients are different so as to share the total active power curtailed among all PV inverters/houses. Simulation results demonstrate the effectiveness of the proposed schemes and that the option of sharing the power curtailment among all customers comes at the cost of an overall higher amount of power curtailed.

Original languageBritish English
Article number5664808
Pages (from-to)139-147
Number of pages9
JournalIEEE Transactions on Sustainable Energy
Issue number2
StatePublished - Apr 2011


  • Power distribution
  • power quality and voltage control
  • power systems
  • solar power generation


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