Auburn West 15th Street Substation Maintenance

Auburn Electric Department is a municipally owned utility in Auburn, Indiana serving over 6,000 residential customers and approximately 775 commercial and industrial customers.  The system includes two interconnections at 138kV, a 69kV sub-transmission loop, and six substations, and covers a service territory of fifteen square miles.  Spectrum Engineering has been Auburn Electric's primary provider of engineering services related to Auburn's power system for over 30 years.  As a part of Auburn Electric's system-wide plan to reduce unplanned outages and increase system reliability, we perform electrical equipment inspection, testing, and maintenance for the utility in the proper intervals to satisfy warranty, insurance, and government requirements.
In 2010 the City of Auburn was awarded one of 100 ARRA SmartGrid Investment Grants to deploy new technologies.  Calling this initiative "Auburn SmartGRID", the City is taking advantage of this opportunity to develop its electric system to meet the demands of its customers and position the community ahead in terms of business and economical development.  One of the phases of implementing Auburn SmartGRID was the replacement and/or upgrades of distribution relays for the West 15th Street Substation.  This installation became a part of the substation's 2011 maintenance project.
69kV Line ControlsBuilt in 1997, the West 15th Street Substation has two power transformers which include load tap changers.  Our technicians replaced all of the protective relays with the latest microprocessor-based relays available.  The result was increased system reliability and better protective device coordination on the system as a whole.  This meant reduced outages and outage times with better reporting capabilities and fault analysis.  When replacing all of the relays in a substation, typically all the wiring is replaced as well.  However, with our ability to reuse existing wires for different purposes, great expense was reduced.
Each piece of equipment was thoroughly cleaned, maintained, tested, and, where necessary, replaced or repaired.  Once maintenance was complete and relays replaced, each protective device was thoroughly checked and operated.  Additionally, system fault simulation was performed using a Doble relay test set.  With the project complete, the substation was back in action and ready for operation