5.2 ERMUSR 03-09-2004 - Laserfiche WebLink

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ANNUAL RELIABILITY PERFORMANCE REPORT Reference: Minnesota Rules, part 7826.0500 Elk River Municipal Utilities will submit a report of its reliability performance report to its local governing body annually. The report shall include at least the following information: A.) the utility's System Average Interruption Duration Index or"SAIDI" for the calendar year. SAIDI means the average customer-minutes of interruption per customer. It is determined by dividing the annual sum of customer-minutes of interruption by the average number of customers served during the year. B.) the utility's System Average Interruption Frequency Index or"SAIFI". SAIFI means the average number of interruptions per customer per year. It is determined by dividing the total annual number of customer interruptions by the average number of customers served during the year. C.) the utility's Customer Average Interruption Duration Index or"CAIDI" for the calendar year. CAIDI means the average customer-minutes of interruption per customer interruption. It approximates the average length of time required to complete service restoration. It is determined by dividing the annual sum of all customer-minutes of interruption durations by the annual number of customer interruptions. D.) Elk River Municipal Utilities will note in its report unusual events, such as severe storms. E.) Elk River Municipal Utilities will adopt an action plan, sought by its local governing body, for remedying any failure to comply with its own locally- set reliability standards. The local governing body shall set reliability performance standards in the form of numerical values for the SAIDI, SAIFI, and CAIDI. These standards will be filed with this report and will remain in effect until new standards are filed or if changes are made in another proceeding. F.) Elk River Municipal Utilities will track each interruption of a bulk power supply facility that impacts the local distribution system during the calendar year. Elk River Municipal Utilities will compile SAIDI, SAIFI and CAIDI indices including interruptions of bulk power supply, and a separate SAIDI, SAIFI and CAIDI report on interruptions due solely to local distribution system causes. G.) Elk River Municipal Utilities will diligently attempt to obtain detailed explanations from bulk power suppliers (generation and transmission companies) in regards to bulk supply interruptions and steps that have been taken or will be taken to prevent future interruption.