Optimal Transmission Line Switching under Geomagnetic Disturbances

Lu, Mowen; Nagarajan, Harsha; Yamangil, Emre; Bent, Russell; Backhaus, Scott; Barnes, Arthur

doi:10.1109/TPWRS.2017.2761178

Title: Optimal Transmission Line Switching under Geomagnetic Disturbances

Abstract

Recently, there have been increasing concerns about how geomagnetic disturbances (GMDs) impact electrical power systems. Geomagnetically-induced currents (GICs) can saturate transformers, induce hot spot heating and increase reactive power losses. These effects can potentially cause catastrophic damage to transformers and severely impact the ability of a power system to deliver power. To address this problem, we develop a model of GIC impacts to power systems that includes 1) GIC thermal capacity of transformers as a function of normal Alternating Current (AC) and 2) reactive power losses as a function of GIC. We also use this model to derive an optimization problem that protects power systems from GIC impacts through line switching, generator dispatch, and load shedding. We then employ state-of-the-art convex relaxations of AC power flow equations to lower bound the objective. We demonstrate the approach on a modified RTS96 system and UIUC 150-bus system and show that line switching is an effective means to mitigate GIC impacts. We also provide a sensitivity analysis of decisions with respect to GMD direction.

Authors:

Lu, Mowen ^[1];

^[2]; Yamangil, Emre ^[2];

^[2];

^[3]; Barnes, Arthur ^[2]

Clemson Univ., SC (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials, Physics and Applications

Publication Date:: Wed Oct 11 00:00:00 EDT 2017

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1407876

Report Number(s):: LA-UR-16-28374
Journal ID: ISSN 0885-8950; TRN: US1703057

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Power Systems

Additional Journal Information:: Journal Volume: 33; Journal Issue: 3; Journal ID: ISSN 0885-8950

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 24 POWER TRANSMISSION AND DISTRIBUTION; GMD; transmission line switching; convex relaxations; ACOPF; GIC

Citation Formats


                    Lu, Mowen, Nagarajan, Harsha, Yamangil, Emre, Bent, Russell, Backhaus, Scott, and Barnes, Arthur. Optimal Transmission Line Switching under Geomagnetic Disturbances.  United States: N. p., 2017. 
Web.  doi:10.1109/TPWRS.2017.2761178.

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                    Lu, Mowen, Nagarajan, Harsha, Yamangil, Emre, Bent, Russell, Backhaus, Scott, & Barnes, Arthur. Optimal Transmission Line Switching under Geomagnetic Disturbances.  United States.  https://doi.org/10.1109/TPWRS.2017.2761178

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                    Lu, Mowen, Nagarajan, Harsha, Yamangil, Emre, Bent, Russell, Backhaus, Scott, and Barnes, Arthur. Wed .  
"Optimal Transmission Line Switching under Geomagnetic Disturbances".  United States.  https://doi.org/10.1109/TPWRS.2017.2761178.  https://www.osti.gov/servlets/purl/1407876.

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@article{osti_1407876,

  title        = {Optimal Transmission Line Switching under Geomagnetic Disturbances},

  author       = {Lu, Mowen and Nagarajan, Harsha and Yamangil, Emre and Bent, Russell and Backhaus, Scott and Barnes, Arthur},

  abstractNote = {Recently, there have been increasing concerns about how geomagnetic disturbances (GMDs) impact electrical power systems. Geomagnetically-induced currents (GICs) can saturate transformers, induce hot spot heating and increase reactive power losses. These effects can potentially cause catastrophic damage to transformers and severely impact the ability of a power system to deliver power. To address this problem, we develop a model of GIC impacts to power systems that includes 1) GIC thermal capacity of transformers as a function of normal Alternating Current (AC) and 2) reactive power losses as a function of GIC. We also use this model to derive an optimization problem that protects power systems from GIC impacts through line switching, generator dispatch, and load shedding. We then employ state-of-the-art convex relaxations of AC power flow equations to lower bound the objective. We demonstrate the approach on a modified RTS96 system and UIUC 150-bus system and show that line switching is an effective means to mitigate GIC impacts. We also provide a sensitivity analysis of decisions with respect to GMD direction.},

  doi          = {10.1109/TPWRS.2017.2761178},

  journal      = {IEEE Transactions on Power Systems},

  number       = 3,

  volume       = 33,

  place        = {United States},

  year         = {Wed Oct 11 00:00:00 EDT 2017},

  month        = {Wed Oct 11 00:00:00 EDT 2017}

}

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https://doi.org/10.1109/TPWRS.2017.2761178

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Works referencing / citing this record:

An adaptive, multivariate partitioning algorithm for global optimization of nonconvex programs
journal, January 2019

Nagarajan, Harsha; Lu, Mowen; Wang, Site
Journal of Global Optimization, Vol. 74, Issue 4
DOI: 10.1007/s10898-018-00734-1

An Adaptive, Multivariate Partitioning Algorithm for Global Optimization of Nonconvex Programs
preprint, January 2017

Nagarajan, Harsha; Lu, Mowen; Wang, Site
arXiv
DOI: 10.48550/arxiv.1707.02514

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Title: Optimal Transmission Line Switching under Geomagnetic Disturbances

Abstract

Citation Formats

An adaptive, multivariate partitioning algorithm for global optimization of nonconvex programs journal, January 2019

An Adaptive, Multivariate Partitioning Algorithm for Global Optimization of Nonconvex Programs preprint, January 2017

An adaptive, multivariate partitioning algorithm for global optimization of nonconvex programs
journal, January 2019

An Adaptive, Multivariate Partitioning Algorithm for Global Optimization of Nonconvex Programs
preprint, January 2017