Post-contingency voltage and reactive power estimation and large error detection

Pablo A. Ruiz, Peter W Sauer

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

Abstract

Operational reliability is normally checked using contingency analysis, thus requiring power flow solutions under a wide variety of system conditions. As power flows are computationally expensive and approximate solutions are usually acceptable, fast estimation methods are used. Real power distribution factor methods provide a good trade-off between accuracy and speed. Reactive power and voltage sensitivities-based methods have not been as successful, due to the large maximum estimation errors reported. This paper discusses the estimation of post-contingency voltages and reactive power generation and flows using sensitivities. Contingencies that lead to large estimation errors are detected using the nodal power mismatches of the estimated state. Representative results are presented using the IEEE 57-bus test system.

Original languageEnglish (US)
Title of host publication2007 39th North American Power Symposium, NAPS
Pages266-272
Number of pages7
DOIs
StatePublished - Dec 1 2007
Event2007 39th North American Power Symposium, NAPS - Las Cruces, NM, United States
Duration: Sep 30 2007Oct 2 2007

Publication series

Name2007 39th North American Power Symposium, NAPS

Other

Other2007 39th North American Power Symposium, NAPS
CountryUnited States
CityLas Cruces, NM
Period9/30/0710/2/07

Keywords

  • Contingencies
  • Distribution factors
  • Generator outage
  • Line outage
  • N - 1 security
  • Reactive power
  • Sensitivities

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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