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2023

Topic:      High Voltage Clean Air Breaker

Date:  March 14, 2023 (Tuesday)

Time:    10:30 am – 11:30 am

PDH:      1 Contact Hour

Location: Hybrid (in-person and online)

Physical Location:

Entergy THQ – Cafetorium

6540 Watkins Dr,

Jackson, MS 39213

Online through Webex: https://entergy-cloud.webex.com/entergy-cloud/j.php?MTID=m1260c113d0493513d47b2bd62f881afa

Abstract:  Utilities are leveraging technology to meet environmental goals. High Voltage clean air breaker is a step in that direction as these do not contain greenhouse gases (GHG) versus the existing SF₆ technology that has a large GHG footprint. The pros and cons of this technology will be discussed versus current SF₆ breaker technology and SF₆ alternative gas technology.

Speaker: Mr. Eddie Hester received his B.S.E.E. from Mississippi State University in 1995.  He has been   working at Entergy since 1997 and is currently a Sr. Staff Engineer supporting substation equipment.  He is the SME for HV breakers and recently installed High Voltage clean air breaker at Entergy substation in Vicksburg, MS.

2021

Topic: Effects of Distributed Energy Resources on the Transmission and Distribution grids

WebEx link:

https://msstate.webex.com/msstate/j.php?MTID=mbe3b93ac92da3a5273f237f1defe25c8

Thursday, Apr 29, 2021 12:00 pm | 1 hour | (UTC-05:00) Central Time (US & Canada)

Meeting number: 120 548 5741

Password: GAhKMAxT898

Abstract: The negative effects of the high penetrations of distributed Energy Resources (DERs) on the load tap changer (LTC) operation include excessive tap operations and subsequent distribution voltage flicker. Increasing the dead band of the LTC from 2-volt, which is the current operational deadband, to 3-volt setting and using the reactive power injection of the smart inverter with appropriate Q-V curve are the two solutions that can diminish the excessive operation of the LTC during the high penetration of the DER units. A study of a portion of a transmission system integrated with a detailed distribution model in a co-simulation setting is then conducted to observe the effects of the DERs interfacing community solar units as well as the proposed solutions.

Speaker: Shahab Mehraeen (S’08–M’10) received the B.S. degree in electrical engineering from Iran University of Science and Technology, Tehran, Iran, in 1995, the M.S. degree in electrical engineering from Esfahan University of Technology, Esfahan, Iran, in 2001, and the Ph.D. degree in electrical engineering from Missouri University of Science and Technology, Rolla, in 2009. Prior to his PhD, he worked for power generation industry for four years in power plant retrofit projects and control systems. He joined the Louisiana State University, Baton Rouge, LA, USA, in 2010. His current research interests include micro grids, renewable energies, power systems dynamics, ac and dc protection, ac-dc grids, and smart grids. In addition, he conducts research on decentralized, adaptive, and optimal control of dynamical systems. Shahab Mehraeen is a National Science Foundation CAREER awardee and holds a U.S. patent on energy harvesting and a few more pending. He is the director of the “Smart Grid and Renewable Power Laboratory: Control and Protection” at the Louisiana State University and a senior member of IEEE.