Power network flow blocking for mitigating the effects of geomagnetically induced currents

Hao Zhu

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

Abstract

In power networks, the flow is related to the generation/load injection by the bus (node) admittance matrix, which can be considered as a weighted graph Laplacian. This type of network flow model complicates the analysis of adding or deleting some connections for given node injection. Specifically, the present paper investigates the problem of mitigating the flow of geomagnetically induced currents (GICs) by blocking the transformer neutrals. Induced by solar storms, GICs cause half cycle saturation of transformers and consequently affect the power grid with harmonics and reactive power losses. The effects of blocking devices have been found to be mostly local at the substation level. To facilitate the analysis of blocking effects, a linearized approximation model is used by selecting the substations to block all high-voltage level transformers therein. For a given budget on the number of blocking devices, it can be cast as a binary constrained quadratic problem and further relaxed to a convex semidefinite program. The effectiveness of the proposed scheme has been demonstrated using both a 20-bus GIC test case.

Original languageEnglish (US)
Title of host publication2014 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages862-866
Number of pages5
ISBN (Electronic)9781479970889
DOIs
StatePublished - Feb 5 2014
Event2014 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014 - Atlanta, United States
Duration: Dec 3 2014Dec 5 2014

Publication series

Name2014 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014

Other

Other2014 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014
Country/TerritoryUnited States
CityAtlanta
Period12/3/1412/5/14

Keywords

  • Geomagnetically induced currents (GICs)
  • Power network flow analysis
  • Quadratic binary problem

ASJC Scopus subject areas

  • Signal Processing
  • Information Systems

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