Long duration overvoltages due to current backfeeding in secondary networks

Reynaldo Salcedo, Xuanchang Ran, Francisco De Leon, Dariusz Czarkowski, Vitaly Spitsa

Research output: Contribution to journalArticle

Abstract

This paper analyzes long duration overvoltages due to backfeeding currents from the low-voltage network to the medium-voltage network through network protectors in heavily meshed underground distribution networks. Overvoltages above 3 p.u. may be developed as a result of a simultaneous occurrence of three phenomena: neutral displacement, Ferranti effect, and current chopping. A detailed model of a typical distribution network is utilized for the study. Time-domain simulations are performed using an Electromagnetic Transients Program-type program. The results demonstrate that overvoltages due to backfeeding last longer during peak load operating conditions, and the largest peak overvoltages occur at no load.

Original languageEnglish (US)
Article number6579778
Pages (from-to)2500-2508
Number of pages9
JournalIEEE Transactions on Power Delivery
Volume28
Issue number4
DOIs
StatePublished - 2013

Keywords

  • Metropolitan area networks
  • overvoltages
  • power system transients
  • time-domain analysis

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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