Definition
Supply quality is a collective term for the reliability of electricity supply from the network operator to the end userHousehold or business connected to the electricity grid and consuming electrical power.. In Norwegian regulation, supply quality is operationalised through the KILEQuality-adjusted Revenue (Kvalitetsjustert inntektsramme) - economic regulation where grid companies are penalised for power outages based on their cost to customers. scheme (Quality-Adjusted Revenue Caps for Undelivered Energy), under which network operators are charged financially for outages affecting customers. NVENorway's Directorate of Water Resources and Energy - regulates the electricity and water resources sectors. calculates KILE costs based on outage data: duration, time of day, number of customers affected and customer category. Network operators are obliged to report outages to NVE and to customers. Supply quality is closely linked to voltage quality and is a central KPI in revenue capNVE's regulatory model that sets a ceiling on grid operators' allowed revenues over a regulatory period. regulation. Internationally, supply quality is typically measured using SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index).