New microprocessor based relay to monitor and protect power systems against sub-harmonics

K. Narendra, D. Fedirchuk, R. Midence, N. Zhang, A. Mulawarman, P. Mysore, V. Sood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

68 Scopus citations

Abstract

A routine switching event in the Xcel Energy transmission system resulted in sustained oscillations between wind generators and the system connected through a series compensated line. This event led to the development of a new microprocessor based sub-harmonic protection relay that could detect such conditions and take preventative measures. This paper discusses a new technique to detect sub-harmonics in the range of 5 - 25 Hz using current and voltage level detectors, sub-harmonic calculations of individual sub-harmonics and total sub-harmonic distortion factor (TSHD) to generate an alarm and/or trip to isolate the faulty system. Various test cases are presented to illustrate the effectiveness of the new technique.

Original languageEnglish (US)
Title of host publication2011 IEEE Electrical Power and Energy Conference, EPEC 2011
Pages438-443
Number of pages6
DOIs
StatePublished - 2011
Event2011 IEEE Electrical Power and Energy Conference, EPEC 2011 - Winnipeg, MB, Canada
Duration: Oct 3 2011Oct 5 2011

Publication series

Name2011 IEEE Electrical Power and Energy Conference, EPEC 2011

Conference

Conference2011 IEEE Electrical Power and Energy Conference, EPEC 2011
CountryCanada
CityWinnipeg, MB
Period10/3/1110/5/11

Keywords

  • Recursive Fourier Transform
  • Series-compensated wind farms
  • sub-harmonic oscillations
  • sub-harmonic protection
  • transmission line protection

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