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.

CAIFI and CTAIDI Why? Let’s say that a company’s overall reliability is: SAIDI = 90 minutes SAIFI = 1.5 But half the company is served by a secondary network that hasn’t and an interruption in the past ten years. Is that important? Averages can deceive

Jan 25, 2024 · We measure U.S. electric utility reliability using two indexes: The System Average Interruption Duration Index (SAIDI) measures the total duration (in hours) an average customer experiences non-momentary power interruptions in a one-year period.

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

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.

Jul 17, 2023 · Indicator Description: The system average interruption frequency index (SAIFI) is the average number of service interruptions experienced by a customer in a year. The index is computed based on the methodology in the DB16-20 studies.

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

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...

In this report, we break down the meaning of some important metrics (commonly referred to via acronym) used by the Federal Energy Regulatory Commission, along with utilities themselves, when measuring utility service reliability.