utilities - Utility Reliability Indices Utilities Home :: Annual Reports :: Utility Reliability Indices :: Telecommunications :: Engineering :: Accounting/Economics :: Energy Efficiency Renewable Energy :: Related Links :: Contact Us Utility Reliability Indices PNM :: El Paso Electric :: Southwest Public Service Company   Public Service Company of New Mexico (PNM) Reliability Indices   DEFINITIONS PER IEEE STD. 1366-2003 SAIFI = System Average Interruption Frequence Index = how often the average customer experiences a sustained outage over a predefined period of time. SAIDI = System Average Interruption Duration Index = the total duration of interruption for the average customer during a predefined period of time. CAIDI = Customer Average Interruption Duration Index = the average time required to restore service. ASAI = Average System Availability Index = the fraction of time that a customer has received power during the defined reporting period. DATA BASED ON IEEE 1366 STANDARDS Year SAIFI SAIDI CAIDI ASAI Comments index minutes minutes % 2005 0.49 35.92 73.35 99.9989   2006 0.74 69.31 93.66 99.9978   2007 0.73 58.11 79.86 99.9982   2008 0.70 68.16 97.73 99.9979   2009 0.81 65.40 81.15 99.9979   2010 0.81 82.63 102.08 99.9974   2011 0.82 82.72 101.21 99.9974     El Paso Electric Company (New Mexico service territory) Reliability Indices   DEFINITIONS PER IEEE STD. 1366-2003 SAIFI = System Average Interruption Frequence Index = how often the average customer experiences a sustained outage over a predefined period of time. SAIDI = System Average Interruption Duration Index = the total duration of interruption for the average customer during a predefined period of time. CAIDI = Customer Average Interruption Duration Index = the average time required to restore service. ASAI = Average System Availability Index = the fraction of time that a customer has received power during the defined reporting period. DATA BASED ON IEEE 1366 STANDARDS Year SAIFI SAIDI CAIDI ASAI Comments index minutes minutes % 2005 0.96 48.41 50.27 99.9908   2006 0.63 41.27 65.01 99.9922   2007 0.71 56.86 79.81 99.9892   2008 0.92 103.63 112.54 99.9803   2009 1.21 97.27 80.20 99.9815   2010 0.90 63.19 70.37 99.9980   2011 1.12 67.71 60.27 99.9871     Southwest Public Service Company (Xcel energy) Reliability Indices   DEFINITIONS PER IEEE STD. 1366-2003 SAIFI = System Average Interruption Frequence Index = how often the average customer experiences a sustained outage over a predefined period of time. SAIDI = System Average Interruption Duration Index = the total duration of interruption for the average customer during a predefined period of time. CAIDI = Customer Average Interruption Duration Index = the average time required to restore service. ASAI = Average System Availability Index = the fraction of time that a customer has received power during the defined reporting period. DATA BASED ON IEEE 1366 STANDARDS Year SAIFI SAIDI CAIDI ASAI Comments index minutes minutes % 2005 0.52 31.35 60.58 99.9940   2006 0.58 33.16 57.15 99.9937   2007 0.63 38.06 59.96 99.9928   2008 0.81 49.96 61.56 99.9906   2009 0.59 44.41 75.08 99.9916   2010 1.06 77.74 73.60 99.9851   2011 0.99 77.17 77.65 99.9855

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