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Novel Cost-effective Technique for Continued Operation of Electrical Equipment During Voltage Sag
Shiva K. Sadula, Rajab Challoo, Xingang Fu, Shuhui Li
Pages - 12 - 47     |    Revised - 31-01-2021     |    Published - 28-02-2021
Volume - 13   Issue - 1    |    Publication Date - February 2021  Table of Contents
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KEYWORDS
Voltage Sag, Industrial, Equipment, Control, Power, Cost-effective.
ABSTRACT
This research focuses on mitigating voltage sags at the control level through a cost-effective method using mini dynamic sag corrector at low voltage systems and proposing control level embedded solutions for equipment design and modifying the technical aspects of electrical devices to facilitate the control circuit to ride-through voltage sags. Voltage sags also known as “dips” are a common cause of power disturbances. These are temporary voltage drops below 90% of the nominal voltage caused by a sudden increase in loads or short circuits and faults lasting up to 170ms. Voltage sag in distribution networks can adversely affect sensitive electrical equipment in industrial processes, such as production and manufacturing, resulting in substantial financial losses of up to $1.5 million/day. Various types of electrical equipment are susceptible to voltage sags but are not limited to power supplies, relays, contactors, variable frequency drives, and programmable logic controllers. In this method, the cost-effective MiniDySCs were installed in the industrial plant to compensate for the missing voltage in the lines during a sag event. Also, modifications to technical aspects of Contactors, Relays, and VFDs are proposed to provide more robust results for the control circuits to ride through voltage sags even up to 40% of the nominal voltage-drop.
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Mr. Shiva K. Sadula
Tesla, 45500 Fremont Blvd, Fremont, CA 94538 - United States of America
Professor Rajab Challoo
Department of Electrical Engineering and Computer Science, Texas A&M University-Kingsville, Kingsville, TX 78363-8202 - United States of America
r-challoo@tamuk.edu
Dr. Xingang Fu
Department of Electrical Engineering and Computer Science, Texas A&M University-Kingsville, Kingsville, TX 78363-8202 - United States of America
Professor Shuhui Li
Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, AL 35487 - United States of America