The System Average Interruption Frequency Index (SAIFI) is commonly used as a reliability index by electric power utilities. This index measures the average number of times that a system customer experiences an outage during the year or during a given time period.

SAIFI (System Average Interruption Frequency Index) represents the average number of times a customer experiences an outage during the year. SAIFI is calculated by dividing the total number of customer interruptions by the total number of customers in the system.

To foster uniformity in the development of distribution service reliability indices and to aid in consistent reporting practices among utilities. To provide guidance for new personnel in the reliability area and to provide tools for internal as well as external comparisons.

Calculation of electrical reliability index: Understand SAIDI, SAIFI, and CAIDI metrics to assess outage frequency, duration, and system performance.

The Customer Average Interruption Duration Index (CAIDI) is a reliability index commonly used by electric power utilities. [1] . It is related to SAIDI and SAIFI, and is calculated as. where is the failure rate, is the number of customers, and is the annual outage time for location . …

Learn about SAIFI, SAIDI, and MAIFI, key reliability indices for electrical distribution systems. Understand their calculation and application.

Jun 13, 2024 · SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index) are widely used reliability indices that measure the performance of power distribution...

SAIDI is the average cumulative outage duration for each customer served, and is calculated as: where is the number of customers and is the annual outage time for location , and is the total number of customers served. In other words, SAIDI is measured in units of time, often minutes or hours; it is usually measured over the course of a year.

Nov 6, 2020 · One metric used to measure the reliability of U.S. electric utilities is the System Average Interruption Duration Index (SAIDI), which measures the total time an average customer experiences a non-momentary power interruption in a one-year period.

System Average Interruption Duration Index (SAIDI) & System Average Interruption Frequency Index (SAIFI) are used to indicate the reliability of electric power utilities in terms of average interruption & average outage experienced by a consumer in a year.