Impact of increased penetration of photovoltaic generation on power systems

Sara Eftekharnejad, Vijay Vittal, Gerald Thomas Heydt, Brian Keel, Jeffrey Loehr

Research output: Contribution to journalArticlepeer-review

688 Scopus citations


Present renewable portfolio standards are changing power systems by replacing conventional generation with alternate energy resources such as photovoltaic (PV) systems. With the increase in penetration of PV resources, power systems are expected to experience a change in dynamic and operational characteristics. This paper studies the impact of increased penetration of PV systems on static performance as well as transient stability of a large power system, in particular the transmission system. Utility scale and residential rooftop PVs are added to the aforementioned system to replace a portion of conventional generation resources. While steady state voltages are observed under various PV penetration levels, the impact of reduced inertia on transient stability performance is also examined. The studied system is a large test system representing a portion of the Western U.S. interconnection. The simulation results obtained effectively identify both detrimental and beneficial impacts of increased PV penetration both for steady state stability and transient stability performance.

Original languageEnglish (US)
Pages (from-to)893-901
Number of pages9
JournalIEEE Transactions on Power Systems
Issue number2
StatePublished - 2013
Externally publishedYes


  • Converter
  • Distributed power generation
  • Photovoltaic generation
  • Power system stability
  • Power transmission

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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