Abstract
System reliability indices deal with the adequacy of overall system supply and indicates the system behaviour and response. The index express interruption statistics in terms of the customers which can be an individual, firm, or organization that purchases electric services at one location under one rate classification, contract or schedule. The system reliability indices include: System Average Interruption Frequency Index (SAIFI), System Average Interruption Duration Index (SAIDI), Customer Average Interruption Duration Index (CAIDI), Average Service Availability Index (ASAI), Average Service Unavailability Index (ASUI), Expected Energy Not Supplied (EENS) and Average Energy Not Supplied (AENS). These indices are used as performance evaluation for power system reliability assessment. This assessment helps in system planning for long and short terms. This study therefore focuses reviewed past study on application of SAIFI, SAIDI and CAIDI for system reliability assessment on electric power system. These indices imply how often an average customer experiences sustained interruption over a predefined time of year and they are most used reliability indices for power system. Keywords: Reliability Indices, SAIDI, SAIFI, CAIDI, ASAI, ASUI, AENS, Reliability Assessment. DOI: 10.7176/JETP/11-6-03 Publication date: November 30 th 2021
Highlights
Power system reliability is the ability of the system to provide adequate supply of electric power with satisfactory quality
System Average Interruption Duration Index (SAIDI) indicates the average time a customer has an interruption during a time cycle (1 year)
Customer Average Interruption Duration Index (CAIDI) is the average interruption duration for those customers interrupted during a year
Summary
Power system reliability is the ability of the system to provide adequate supply of electric power with satisfactory quality. In this study, the application of SAIFI, SAIDI and CAIDI which are most used reliability indices for power system was reviewed. These reliability indices imply how often an average customer experiences sustained interruption over a predefined time of year and. Feeder SAIFI indicates the average number of interruptions a customer experience on a particular feeder in a year. In order to calculate the index, data of individual sustained interruptions in a year are required For each of these interruptions, the number of customers affected comprises the customer interruptions for the particular outage. Www.iiste.org number of customers served in the area
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