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Home My WebLink About20161006Major Event Report.pdfOctober 6, 2016 VL4 OVERNIGHT DELIVERY Jean D. Jewell Commission Secretary Idaho Public Utilities Commission 4 72 West Washington Boise, Idaho 83720-5983 RE CEIVED ZIJlfi OCT -6 9: 12 1407 West North Temple, Suite 310 Salt Lake City, Utah 84116 RE: Rocky Mountain Power -July 19, 2016 Major Event Report for the outage at the Goshen Substation. Dear: Ms. Jewell Rocky Mountain Power is requesting designation of the July 19, 2016 outage and the consequences thereof to be classified as a major event and excluded from its performance results due to the day's performance, which exceeded the Company's major event threshold of 1,114,149 customer minutes lost in a 24-hour period. Attached you will find details regarding the major event including restoration resources, number of customers off supply, total customer minutes lost, as well as SAIDI, and SAIFI figures. Rocky Mountain Power will exclude outage information for this event from its network performance reporting and from customer guarantee failure payments. If you require further information regarding this report, please contact Heide Caswell, Network Performance Director, at (503) 813-6216. Sincerely, ;{)~ A) ~ /.1,144- Douglas N. Bennion, P.E. Vice President Engineering Services & Capital Investment cc: Matt Elam, IPUC Bev Barker, IPUC Report to the Idaho Public Utility Commission Electric Service Reliability -Major Event Report ID-16-2 Event Date: Date Submitted: Primary Affected Locations: Primary Cause: Exclude from Reporting Status: Report Prepared by: Report Approved by: Event Description July 19, 2016 October 5, 2016 Rexburg and Shelley Loss of Substation Yes April Brewer Heide Caswell/ Dan Bodily/ Ken Short On July 19, 2016, the 161 kilovolt (kV) capacitor bank inside the Goshen Substation, in Shelley, Idaho, experienced an internal fault, when two crows made contact with the capacitor bank. The capacitor bank locked out and caught fire, subsequently causing the east and west substation busses to trip. For the day 99% of all customers minutes lost and customers who experienced an outage were the result of the loss of supply event. Event Outage Summary # Interruptions (sustained) 109 Total Customer Interrupted (sustained) 54,157 Total Customer Minutes Lost 6,655,357 State Event SAIDI Impact 86.47 Minutes CAIDI 123 Major Event Start 7 /19/16 12:00 AM Major Event End 7 /20/16 12:00 AM Restoration Summary At 4:45 pm, on July 19, 2016, a fault and subsequent fire at the Goshen substation caused a widespread loss of supply event across in the Rexburg and Shelley operating areas, affecting 70% of Rocky Mountain Powers customers serviced in Idaho. The fire was small and quickly extinguished on its own. Onsite crews began isolating the capacitor bank, while dispatch assessed the impact of the outage. Once the capacitor bank was isolated and the system configuration was reviewed, dispatch began restoring feeds. Coordination and troubleshooting of restoration efforts also occurred with the BPA as they too have equipment at Goshen. Failed capacitor tanks were replaced, tested, and put back into service after all customers had been restored. An internal review of the incident has been completed and substation system configurations have been updated in an effort to prevent similar events in the future. 1 of 3 Of the 54,157 customers who experienced a sustained interruption during this major event the original loss of supply affected 53,955 customers, impacting 33 substations and 100 circuits. Of these customers 39,016 were restored within 2 hours, and 14,939 restored within 3 hours. No customer complaints were filed with the company or commission regarding this outage. Restoration Intervals Restoration Resources Personnel Resources Troublemen/ Assessors 3 Substation Crewmembers 14 TOTAL 17 State Estimated Major Event Costs Estimate$ Labor Contracts Materials Overhead Total Capital $43,000 $0 $14,000 $4,941 $61,941 Expense $1,400 $0 $0 $0 $1,400 Total $44,400 $-$14,000 $4,941 $63,341 Major Event Declaration PacifiCorp designates this event and the consequences thereof a major event in accordance with docket PAC-E-04-07, where the company and commission agreed that determination of major events will be made by applying IEEE standard 1366-2003 methodology (commonly referred to as the 2.5 beta method), wherein a statistical outlier of these extreme events is based on the state daily SAIDI thresholds. The 2016 Idaho reliability reporting region threshold for the company is 1,141,067 customer minutes lost (14.82 SAIDI minutes) in a 24-hour period. 2 of 3 Event Details Customers Out vs. Time 60,000 50,000 ~ 40,000 130.000 :IC a 20.000 10,000 -Ontomert OUt + ,._ Customan Out .......... tonltlonTlffle Total Event Sustained Customer lnterruetioos: S4,1s1 Idaho Major Event ,----9"~7; _f/lH:SZ PM 54,0IO 0+------.,------..-------,-----~-----~-----...... -----...i,..-------n 7/19/1612:00AM 7/19/162:JUM 7/19/16U&AM 7/1'/167:lUM 7/19/169:JliAM 7/1'/1612-C,OPM 7/19/162:24PM 7/19/IU:.aPM 7/19/167:llPM Concurrent Outages vs. Time Total Event Out11es: 109 100 90 -eonawr-OUUpt 80 -•am to NonNfThrflhold 70 • ,-CNtunent ouup, I: ! 0 lllhlrn to Normal a 60 1: 50 ~ t j 40 30 20 10 ot==========~~s::;:;::::::=~::i::=:::;:~;::::;:::::t:==~ 7/19/1612:00AM 7/19/16 2:24 AM 7/19/164:4&AM 7/19/16 7:12 AM 7/19/169:J6AM 7/19/1612.1>0 PM 7/19/162:24 PM 7/19/164:4& PM 7/19/16 7:12 PM Customer Minutes Interrupted vs. Time (Cumulative) J .!i ~ a l 1t f ! I: j ::t1 Total Customer Minutes Interrupted: 6,655,357 7.000.000 6,000,000 --CMI 5,000,000 -Malor fflnt. lh"aflold • Stort,._offlntOUt- 4.000.000 • Start Tlme of I.alt Outap • J.._HrCMI 3,000,000 2.000.000 1,000,000 7/lt/166:SSAM -CMI 6,655,357 r---a 7/lt/115:SZ PM 0 4------.,------,..----~---.-------,------~------.------.i.------.,-- 7/19/16 12:00 AM 7 /19/16 2:24 AM 7/19/164:4&AM 7/19/167:UAM 7/19/169:36 AM 7/19/1612:00 PM 7/19/16 2:24 PM 7 /19/164:4& PM 7/19/16 7:12 PM SAIDI, SAIFI, CAIDI by Reliability Reporting Region Please see the attached system-generated reports. 3 of 3 Data as/of Fiscal Year Event Begin Date/Time Event End Date/Time Month Begin Month End Year Begin Year End State Comments: 8/15/2016 FY2017 Date 07/19/201612:00:00 AM 07/20/201612:00:00 AM Tag 7/1/2016 7/31/2016 1/1/2016 7/31/2016 Idaho Event Begin Time Event End Time filed Idaho ~~ 7/l9/2016 through 7/20/2016 PacifiCorp Major Events Report Number of Customer Analysis* Sustained % Sustained Sustained Customers Off Customers Off CML Interruptions PC PACIFICO RP 54,157 3% 6,655,357 109 RMP Rockv Mountain Power 54,157 5% 6,655,357 109 I PacifiCorp Major Event Report Customer Analysis Customers Restonld by ._,,,. Customer Smln -3 hrs · 24 hrs -48hrs -72hrs - Count <Smin 3 hrs 24hrs 48hrs 72hrs 96hrs 1,868,631 54,022 ! 135 1,097,421 54,022 135 % Sustained Customers Restored In 3 96+hrs Hours PS4 100% 100% ID Idaho ·---54,157 70% 6,655,357 109_L ______ 76,971 _ _:_L 54,23.3.L _ 13.~L __ .:._J__ _-_J __ -__ L ..... .:....._l__ 100% ID MONTPELIER 0% 1 9,753 na ID PRESTON 1 0% 108 1 8,044 1 100% ID REXBURG 27,744 86% 3,710,448 58 32,156 27,609 135 100% ID SHELLEY 26,412 101% 2,944,800 49 26,229 26,412 100% •o nly current event specific metric impact shown. Does not include values from other events which may have occurred in other regions during the same time period. eus-r lntenupted by Date 7/19/2016 lllrough 7/20/2016 c-Restonld by lntelvals % Sustained Date• Number of Average Customers Sustained % Sustained Sustained Customer Smln-3 hrs-24hrs -48 hrs -72hrs -Restored in 3 Customers Off Customers Off CML Interruptions Count <Smin 3hrs 24 hrs 48 hrs 72hrs 96hrs 96+hrs Hours PS4 7/19/2016 54,157 70% 6,655,357 109 76,971 54,022 135 100% Data as of 8/15/2016 ID 071916 Major Event Final Report.xlsxCustomer Analysis 2 Major E-Only- metric by operatlnl .,.. amomer counts SAIDI SAIFI CAIDI 3.56 0.029 123 6.06 0.049 123 ---· 86.~1-o.7o4.L. _____ 12.3_ 0.01 0.000 108 115.39 0.863 134 112.27 1.007 111 Major Event Only - metnc by state customer eountl SAIDI SAIFI CAIDI 86.47 0.704 123 101512016 Idaho Event 07/19/16 Major Events Included PacifiCorp Major Events Report SSC by State SAIDI SAJFI CAIDI PC PACIFICORP 3.74 0.030 124 c-------· ----RMP Rocky Mountain Power 6.28 0.051 124 .!£_ Idaho 86.47 0.704 123 ----- ID MONTPELIER --- ID PRESTON 0.00 0.000 108 - ID REXBURG 48.21 0.360 134 ---- ID SHELLEY 38.26 0.343 111 ID SMITHFIELD - through 07/20/16 PacifiCorp Major Event Report SSC by State Analysis Month 07/01/16 through 07/31/16 Major Event Excluded Major Events Included Major Events Excluded• SAIDI SAlFI CAIDI SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI 0.17 0.001 159 19.32 0.170 113 15.16 0.131 116 0.22 0.001 167 23.48 0.189 124 17.42 0.140 125 0.14 0.001 139 107.75 0.862 125 21.28 I 0.159 1 134 ---~ ---1.09 0.014 80 1.09 0.014 80 -1.37 0.011 125 1.37 0.011 125 64.60 0.466 139 16.40 0.106 155 ----· --40.68 0.372 109 2.42 0.028 85 ---0.00 0.000 272 0.00 0.000 272 •may include other regional major event exclusions during the same period. Operating areas are calculated by the state frozen customer count metrics. Data as/of 8/15/2016 ID 071916 Major Event Final Report.xlsxSSC by State 3 YTD mo11 01/01/16 throucti 07/31/16 Major Events Included Major E11ents Excluded• SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI 127.45 0.903 141 73.54 0.651 113 137.08 0.943 145 76.71 1 0.658 1 117 189.87 1.779 107 85.08 1 0.737 1 115 9.38 0.120 78 9.30 I 0.120 1 ~ 12.55 0.132 95 12.54 0.132 I 95 103.55 0.984 105 37.97 0.294 129 I 64.06 0.539 119 24.94 0.188 1 133 0.34 0.004 94 0.34 0.004 94 10/5/2016