VIRTUAL: Graduate Seminar with Rishi Sharma: Assessing & Mitigating the Impacts of Geomagnetic Disturbance on Transmission System

When

February 24, 2021    
1:10 pm - 2:00 pm

Event Type

This event will be held virtually.

Speaker: Rishi Sharma, ECpE Graduate Student

Advisor: James D. McCalley

Title: Assessing & Mitigating the Impacts of Geomagnetic Disturbance on Transmission System

Abstract: GICs induced in the transmission network due to geomagnetic disturbance (GMD) events may lead to large-scale power outages and power system equipment damage. As per the FERC order 830, the two key developmental needs regarding defense against GMD events are; accurate modeling of GICs and GMD impact assessment based on a credible 1-in-100 year GMD benchmark scenario. In this work, we have developed a modeling approach that unifies the 3-D earth conductivity representation and the transmission network representation; this enables computation of the GICs directly using the B-field data. A set of so-called unified model parameters are determined using the GIC and B-field data measured during the Dec 2015 GMD event. We also estimate the 1-in-100 year return level of GICs for the transmission network of Iowa, based on extreme value analysis (EVA) of historic GICs calculated using historic (1979-2018) B-field data. The EVA is performed by fitting the historical GIC distribution on a family of distribution models, including power law, lognormal, generalized extreme value, and generalized pareto distribution (GPD).

Bio: Rishi Sharma is a graduate student at Iowa State University pursuing his Ph.D. under Dr. James D. McCalley. He has been working on the impacts of geomagnetic disturbances on the power grid for his Ph.D. Prior to coming to ISU, he worked as a research assistant at the Indian Institute of Technology, Delhi, for one year and before that as a graduate engineer trainee at Reliance Industries, Vadodara for one year. He obtained his B.Tech degree from the Indian Institute of Technology, B.H.U, Varanasi.

Webex Link: https://iastate.webex.com/iastate/j.php?MTID=m4b3ccc5cabd738a20f59765153b21a20

Recording: https://iastate.webex.com/iastate/ldr.php?RCID=abfd203533e6489eaa72e4bd7192d8b4

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