Efficient and comprehensive evaluation method of temporary overvoltage in distribution systems with inverter-based distributed generations

Namhun Cho, Moonjeong Lee, Myungseok Yoon, Sungyun Choi

Research output: Contribution to journalArticlepeer-review

Abstract

In general, a temporary overvoltage (TOV) on the healthy phases occurs because of the neutral-shift phenomenon during a single line-to-ground (SLG) fault. The TOV can destroy the insulation of electric devices and cause damage to other equipment and customer loads in just a few cycles. In practice, the TOV can be affected by numerous factors: the sequence reactance ratio of the interconnection transformer, the ratio of load to DG, and the distance to the fault. More importantly, inverter-based distributed generations (DGs) have different influences on the TOV from traditional synchronous-machine-based DGs. In this sense, this work performed an efficient and comprehensive investigation on the effect of these various parameter types and their extensive variations, based on steady-state analysis with sequence equivalent circuits and three-dimensional representations. The proposed methodology can facilitate judging the impact of multi-parameter conditions on the TOV readily and comparing the fault characteristics of synchronous-machine-based and inverter-based DGs. Finally, the results can be used for future studies on TOV mitigation techniques.

Original languageEnglish
Article number7335
JournalSustainability (Switzerland)
Volume13
Issue number13
DOIs
Publication statusPublished - 2021 Jul 1

Keywords

  • 3D graph
  • Distributed generation
  • Effective grounding
  • Inverter-based DG
  • Single line-to-ground fault
  • Temporary overvoltage (TOV)

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Environmental Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Management, Monitoring, Policy and Law

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