Customers today have a high dependence on reliable energy for their every day productivity and convenience. Service feeders can experience faults due to natural effects, man-made situations, or from equipment failures, causing customers to experience service interruptions. Knowing where these faults are, limiting the total number of customers that are impacted by these faults, and quickly restoring power to customers are issues that utilities continually face.
FLISR (Fault Location, Isolation and Supply Restoration) is a collection of tools used for detection, location, and isolation of faults and restoration of supply for de-energized customers. FLISR can be used in manual, semi-automatic, and automatic mode. Each applications that is part of the FLISR solution is also available as a separate application.
Fault Location (FL) supports detecting the location of the fault. It calculates the locations where faults could have occurred by analyzing the fault pattern along with available real-time information acquired from field devices, including fault indicator outputs, fault magnitude at various locations on the feeder, and protective relay tripping.
Element Isolation (EI) determines which switching manipulations are needed for isolating selected elements, using defined types of equipment for isolation.
Supply Restoration (SR) is used for determining the optimal plan of switching actions for restoring supply to the de-energized parts of the distribution network.
Large Area Restoration (LAR) determines the plan for restoration of the supply of large parts of the distribution network, which remained de-energized after a fault occurrence on a supply transformer (HV/MV transformer) or MV busbar in a supply station (HV/MV station) or after isolation of an element for the maintenance purpose in supply station.