Reliability Report -- 1999 - Pennsylvania Public Utility Commission

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PECO Energy Company System Average Interruption Frequency Index (SAIFI) 1.6 1.5 1.4 1.3 Rolling 12-Month Standard Frequency 1.2 1.1 1.0 Benchmark 0.9 0.8 0.7 0.6 Mar-05 Jun-05 Sep-05 Dec-05 Mar-06 12 Months Ending The graph below shows the distribution of causes of service outages occurring during 2005 as a percentage of total outages. Equipment failure was responsible for 37.4% of the incidents, 36.1% of customers affected and 35.0% of interruption minutes. Tree-related outages (27.7% of incidents) were caused by broken branches and trunks or uprooted trees (71%) and vegetation in-growth (29%). Together, these outages resulted in 25.4% of the customers affected and 30.8% of interruption minutes. PECO’s service territory experienced 14 storms containing lightning activity in 2005. Electric Service Reliability in Pennsylvania 35
PECO Energy Company 2005 Outage Causes Other Unknown Customer Minutes Interrupted Customers Affected Number of Incidents Vehicles Vegetation In-Growth Vegetation Broken/Uprooted Transmission/Substation Lightning Equipment Failure Contact/Dig In Animal Contact 0% 5% 10% 15% 20% 25% 30% 35% 40% Percent of Outages PPL Electric Utilities Corporation In 2005, PPL provided service to its customers at a performance level that was better than the standards established by the Commission. CAIDI and SAIFI were also better than the benchmarks: 125 minutes for CAIDI, compared to a benchmark of 145 minutes and 0.96 interruptions for SAIFI, compared to a benchmark of 0.98. All three indices improved from 2004. One major event occurred in PPL’s service territory during 2005. The calculations for the reliability indices excluded outage data related to this event, which was approved by the Commission. January 6-16, 2005; snow, sleet and freezing rain; 238,154 customer service interruptions. For the 2005 calendar year, PPL filed seven outage reports pursuant to 52 Pa. Code § 67.1, including one for the major event discussed above. 36 Pennsylvania Public Utility Commission
Page 1 and 2: ElectricService Reliabilityin Penns
Page 3 and 4: EXECUTIVE SUMMARY The Electricity G
Page 5 and 6: TABLE OF CONTENTS SECTION 1 - INTRO
Page 7 and 8: Subsequently, on December 16, 1999,
Page 9 and 10: included is the data used in calcul
Page 11 and 12: the reliability performance of the
Page 13 and 14: Utility Specific Performance Data A
Page 15 and 16: As seen here, CAIDI improved from t
Page 17 and 18: Allegheny Power System 2005 Outage
Page 19 and 20: Duquesne Light Company Customer Ave
Page 21 and 22: The graph below shows the distribut
Page 23 and 24: Metropolitan Edison Company Custome
Page 25 and 26: Metropolitan Edison Company System
Page 27 and 28: the SAIFI benchmark was increased f
Page 29 and 30: The rolling 12-month averages for t
Page 31 and 32: 14.0% of total incidents, 18.5% of
Page 33 and 34: Pennsylvania Power Company Customer
Page 35 and 36: Pennsylvania Power Company System A
Page 37 and 38: In 2005, PECO’s customers experie
Page 39: PECO Energy Company System Average
Page 43 and 44: PPL Electric Utilities Corporation
Page 45 and 46: PPL’s SAIFI was below the benchma
Page 47 and 48: UGI Utilities, Inc. Customer Averag
Page 49 and 50: UGI Utilities, Inc. System Average
Page 51 and 52: determine the type of each event ex
Page 53 and 54: Citizens' Electric Company System A
Page 55 and 56: Pike County Light & Power Company P
Page 57 and 58: Pike County Light & Power Company C
Page 59 and 60: For 2003 and 2004, SAIFI has been a
Page 61 and 62: November 28, 2005: severe weather e
Page 63 and 64: Wellsboro Electric Company System A
Page 65 and 66: SECTION 4 - INSPECTION AND MAINTENA
Page 67 and 68: In addition to monitoring the relia

Reliability Report -- 1999 - Pennsylvania Public Utility Commission

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