Solving the divergence problem in AC-QSS cascading failure model by introducing the effect of a realistic UVLS Scheme

Sina Gharebaghi, Sai Gopal Vennelaganti, Nilanjan Ray Chaudhuri, Ting He, Thomas La Porta

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

Abstract

AC-Quasi-Steady-State (AC-QSS) models for cascading failure often suffer from divergence issues. Presently, this is handled by uniform load shedding (ULS) or its variants till convergence is achieved. In reality, a pre-defined undervoltage load shedding (UVLS) scheme sheds loads in blocks below a voltage threshold and the system reaches a post-UVLS equilibrium, if it exists. This may not be captured by the post-ULS equilibrium, which in turn can lead to a different path of cascade propagation. We use the ULS equilibrium as the initial state and pose the problem of reaching post-UVLS equilibrium as an optimization problem. Due to the nature of the problem, an exhaustive search can be used that has exponential complexity in inputs. To solve this, we propose a heuristic that reaches a post-UVLS candidate equilibrium. The proposed algorithm is tested on a 2383-bus Polish system.

Original languageEnglish (US)
Title of host publicationProceedings of 2020 IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2020
PublisherIEEE Computer Society
Pages710-714
Number of pages5
ISBN (Electronic)9781728171005
DOIs
StatePublished - Oct 26 2020
Event10th IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2020 - Delft, Netherlands
Duration: Oct 26 2020Oct 28 2020

Publication series

NameIEEE PES Innovative Smart Grid Technologies Conference Europe
Volume2020-October

Conference

Conference10th IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2020
CountryNetherlands
CityDelft
Period10/26/2010/28/20

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Information Systems

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