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Fault Location, Isolation, and Service Restoration Technologies Reduce outage Impact and Duration

November 2014
U.S. Department of Energy Office of Electricity Delivery and Energy Reliability
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Southern Company, Duke Energy Business Services LLC, NSTAR Electric Company, Potomac Electric Power Company (DC), Potomac Electric Power Company (MD), Atlantic City Electric Company, CenterPoint Energy Houston Electric, LLC., Fault Location, Isolation and Service Restoration (FLISR), Distribution Automation (DA), DA System Features/Applications, Reliability Benefits, Automated feeder switches, Feeder Segmentation, Smart Grid Investment Grant Program, SGIG

Improving grid reliability is a major goal of the electric power industry and can reduce economic losses, lost productivity, and customer inconvenience from power disruptions. For five utilities, Smart Grid Investment Grant (SGIG) funding accelerated the application of fault location, isolation, and service restoration (FLISR) technologies and systems that help accomplish fewer and shorter outages. This report draws from the experience of seven Smart Grid Investment Grant (SGIG) projects (conducted by five utilities and their operating companies), which provided quantitative metrics for 266 FLISR operations they collectively implemented between April 2013 and March 2014. On average during this time period, FLISR reduced the number of customers interrupted by up to 45%, and reduced the customer minutes of interruption by up to 51% for an outage event.