2 Citations (Scopus)

Abstract

Historical information and ex-post analysis of blackouts reaf-firm the critical role of protective devices in cascading events, thereby confirming the necessity to represent protective func-tions in transient stability studies. The representation of pro-tection functions greatly enhances the accuracy of the transient stability study and leads to a better understanding of power system states during emergency conditions. Although modeling all of the protective relays within transient stability studies may result in a better estimation of system behavior, representing, updating, and maintaining the protection system data becomes an insurmountable task. Inappropriate or outdated representa-tion of the relays may result in incorrect assessment of the sys-tem behavior. This paper presents a systematic method to de-termine essential relays to be modeled in transient stability studies. The desired approach should identify protective relays that are critical for various operating conditions and contin-gencies. The proposed strategy is verified as a viable technique based on results obtained from the WECC 179-bus and the IEEE 145-bus test cases while considering various operating states and contingencies. The results of the transient stability studies confirm that modeling only the identified critical pro-tective relays is sufficient to capture system behavior and pre-cludes the need to model all of the protective relays.

Original languageEnglish (US)
JournalIEEE Transactions on Power Systems
DOIs
StateAccepted/In press - Sep 21 2017

Fingerprint

Relay protection

Keywords

  • Distance relays
  • Generators
  • power system dynamics
  • power system protection
  • Power system stability
  • power system stability
  • Protective relaying
  • relay mis-operation
  • Stability analysis
  • Transient analysis
  • transient stability study
  • unstable power swings

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

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title = "Identification of Critical Protection Functions for Transient Stability Studies",
abstract = "Historical information and ex-post analysis of blackouts reaf-firm the critical role of protective devices in cascading events, thereby confirming the necessity to represent protective func-tions in transient stability studies. The representation of pro-tection functions greatly enhances the accuracy of the transient stability study and leads to a better understanding of power system states during emergency conditions. Although modeling all of the protective relays within transient stability studies may result in a better estimation of system behavior, representing, updating, and maintaining the protection system data becomes an insurmountable task. Inappropriate or outdated representa-tion of the relays may result in incorrect assessment of the sys-tem behavior. This paper presents a systematic method to de-termine essential relays to be modeled in transient stability studies. The desired approach should identify protective relays that are critical for various operating conditions and contin-gencies. The proposed strategy is verified as a viable technique based on results obtained from the WECC 179-bus and the IEEE 145-bus test cases while considering various operating states and contingencies. The results of the transient stability studies confirm that modeling only the identified critical pro-tective relays is sufficient to capture system behavior and pre-cludes the need to model all of the protective relays.",
keywords = "Distance relays, Generators, power system dynamics, power system protection, Power system stability, power system stability, Protective relaying, relay mis-operation, Stability analysis, Transient analysis, transient stability study, unstable power swings",
author = "Mojdeh Hedman and Vijay Vittal",
year = "2017",
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doi = "10.1109/TPWRS.2017.2755866",
language = "English (US)",
journal = "IEEE Transactions on Power Systems",
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AU - Vittal, Vijay

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AB - Historical information and ex-post analysis of blackouts reaf-firm the critical role of protective devices in cascading events, thereby confirming the necessity to represent protective func-tions in transient stability studies. The representation of pro-tection functions greatly enhances the accuracy of the transient stability study and leads to a better understanding of power system states during emergency conditions. Although modeling all of the protective relays within transient stability studies may result in a better estimation of system behavior, representing, updating, and maintaining the protection system data becomes an insurmountable task. Inappropriate or outdated representa-tion of the relays may result in incorrect assessment of the sys-tem behavior. This paper presents a systematic method to de-termine essential relays to be modeled in transient stability studies. The desired approach should identify protective relays that are critical for various operating conditions and contin-gencies. The proposed strategy is verified as a viable technique based on results obtained from the WECC 179-bus and the IEEE 145-bus test cases while considering various operating states and contingencies. The results of the transient stability studies confirm that modeling only the identified critical pro-tective relays is sufficient to capture system behavior and pre-cludes the need to model all of the protective relays.

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