Geomagnetic Disturbance Risk Mitigation by Doble Engineering (CLE)

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Date(s) - 10/10/2017
5:30 pm - 7:30 pm

Beacon Place Lower Level Conference Room

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Cleveland Location on October 10 from 5:30 to 8:00 PM at:
6055 Rockside Woods Blvd
Suite 200, Independence, OH

Refreshments will be served from 5:30 to 6:00

SYNOPSIS: Geomagnetic Disturbances (GMD) originate from solar flares at the surface of the sun traveling to earth and interacting with charged particles in the earth’s atmosphere. Large power transformers connected to the EHV transmission system may experience both winding and structural hot spot heating as a result of severe GMDs inducing currents in power lines. This could overload the electric grid system triggering voltage collapse or worse, damage to large power transformers. The primary impact on power transformers is a result of the quasi-dc current Geomagnetic Induced Current (GIC) that flows through wye-grounded transformer windings.
Per NERC standard TPL-007- 1, effective January 1, 2017, utilities must conduct both initial and ongoing assessments of the potential impact of a “1-in- 100-year” benchmark GMD event on their equipment and the bulk power system as a whole including:
• GIC Disturbance Vulnerability Assessment for system’s ability to withstand benchmark GMD event without causing wide area blackout, voltage collapse, or transformer damage. Applicability: regional transmission authority planning coordinators, with information from generation and transmission companies
• Transformer Thermal Impact Assessment to ensure that all high-side, wye-grounded transformers, rated at >200kV, can withstand thermal transient effects associated with benchmark GMD event.
Applicability: generation and transmission companies, with GIC information from regional transmission authorities


The presentation starts with a brief review of the phenomenon of geomagnetic disturbance. The presentation will then be focused on the general requirements of NERC Standard TPL-007- 1 regarding GMD risk mitigation with the particular emphasis on the following:
1. Impact of GMDs on Transformers
2. Thermal Impact Assessment Requirements
3. Thermal Impact Assessments on Service-Aged Transformers
4. Q&A
The Speaker: Mr. Domenico Corsi manages the transformer consulting group at Doble Engineering where he oversees the investigation and consulting on large power and distribution transformers worldwide. Since 2004 in that capacity, Dom has had the opportunity to inspect transformer factories around the world and to witness the manufacturing of both core and shell form transformers under varied manufacturing processes at different companies.
From 1993 to 2004, prior to joining Doble Engineering, Mr. Dom Corsi worked at Ohio Transformer at progressively advancing positions from Design Engineer to Director of Engineering. Between 1989 and 1992, Dom worked at ABB Power T&D Co. Inc. as a Design and Development engineer of medium power transformers rated from 10 to 100 MVA.
Dom holds an M.S. Degree in Electric Power Engineering from Rensselaer Polytechnic Institute (RPI) of Troy, NY and a B.S. degree in EE from Gannon University, Erie, PA.

1. This event is sponsored by the Cleveland Section and Power and Energy Society chapter.
2. A certificate for 1 PDH hour is available for attendees of this event.


Bookings are closed for this event.

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