Section Puc 307.09 - Reporting of Reliability Measures(a) For purposes of this section, the following definitions shall apply: (1) "Customer average interruption duration index (CAIDI)" means the average interruption duration or average time to restore service per interrupted customer and shall be presented as the following ratio: Total sum of customer interruption durations/total number of customer interruptions;(2) "System average interruption frequency index (SAIFI)" means the average number ofinterruptions per customer and shall be presented in the following ratio: Total number of customer interruptions/average number of customers served;(3) "System average interruption duration index (SAIDI)" means the average duration of customer interruptions and shall be presented as the following calculation; SAIDI = CAIDI x SAIFI; and(4) "CIII" means the average number of customers without power per interruption index as determined by dividing the number of customers interrupted by the number of interruptions.(5) "TMED" means the threshold value used to determine a major event day as defined in IEEE Guide for Electric Power Distribution Reliability Indices 1366-2012, Section 1.5, available as noted in Appendix B.(6) "Major event day" means a day during which a utility's daily system SAIDI exceeds the TMED. (b) Within 45 days of the end of each calendar quarter, each utility shall file quarterly reports of reliability measures defined in (a) (1) - (4) above, and shall separately report the reliability measures by area work center and as aggregated for the whole company.(c) E ach utility shall report the indices separately: (1) With all interruptions included in the data; and(2) With major event days excluded from the data.(d) The report shall depict the reliability measure information by distribution and transmission systems as applicable.N.H. Admin. Code § Puc 307.09
Amended byVolume XXXIV Number 24, Filed June 12, 2014, Proposed by #10603, Effective 5/21/2014, Expires5/21/2024 .