Grid upgrades deliver for Guam Power Authority

2018-02-07 - Guam Power Authority implements a smart grid program to modernize infrastructure, reduce costs and increase customer satisfaction. T&D World article by John J. Cruz and Roel A. Cahinhinan  - January 25, 2018
Established in 1968 with headquarters in the Village of Mangilao on the eastern shore of Guam, Guam Power Authority (GPA) provides electrical service to 50,000 residences, businesses, the local government and federal agencies of this U.S. territory. Like most island utilities, GPA has no conventional energy resources and relies primarily on petroleum products shipped in by tanker to meet most energy needs. Operating as both a generation and distribution utility, GPA maintains 663 miles (1067 km) of transmission and distribution lines and 29 substations.

Through a grant from the U.S. Department of Energy, as part of the American Recovery and Reinvestment Act, GPA was awarded US$16.7 million to help fund 50% of a grid modernization project. The project involved a territorywide deployment of advanced metering infrastructure (AMI) and integration of the AMI with an outage management system (OMS). GPA also implemented substation automation equipment, including voltage regulators, fault indicators, smart relays and transformer monitors. An energy management system was deployed to leverage the new automation assets.

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