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Home My WebLink About20170120Major Event Report.pdfJanuary 20, 2017 VL4 OVERNIGHT DELIVERY Diane Hanian Commission Secretary Idaho Public Utilities Commission 472 West Washington Boise, Idaho 83720-5983 .ECE IVED 2017 Jp.i~ 20 A 110: 2 , -;~ .ldLIC ::'J:.t,i1SS ION RE: Rocky Mountain Power Major Event Report Dear: Ms. Hanian 1407 West North Temple Salt Lake City, Utah 84 II 6 Rocky Mountain Power is requesting designation of the December 5, 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 1,141 ,067 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. ;:+7!~/~w 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-16-4 Event Date: Date Submitted: Primary Affected Locations: Primary Cause: Exclude from Reporting Status: Report Prepared by: Report Approved by: Event Description December 5 -6, 2016 January 20, 2017 Preston Loss of Substation Yes April Brewer Heide Caswell/ Dan Bodily/ Ken Shortt On the evening of December 5, Rocky Mountain Power customers in Preston, Idaho, experienced an outage resulting from a line failure which operated the protective equipment of a mobile transformer. Attempts to close the protective equipment resulted in a series of outages over a 16 hour period. The event affected 3,417 customers representing approximately 29% of the customers served in the Preston operation area . Event Outage Summary # Interruptions (sustained events) 10 Total Customer Interrupted (sustained events) 3,417 Total Customer Minutes Lost 1,849,696 State Event SAIDI Impact 24.03 Minutes CAIDI 541 Major Event Start 12/5/16 11:10 PM Major Event End 12/6/16 11:10 PM Restoration Summary On December 5, 2016, at 11:10 pm, a circuit breaker at the Malad substation tripped open, de-energizing two circuit feeds, affecting 2,310 customers. Crews quickly arrived at the substation to assess the cause of the breaker trip and restore power as quickly as possible. The Malad substation transformer is being replaced, a mobile transformer was in use while the replacement is taking place. Attempts to energize the transformer proved unsuccessful, because the relay protection continued to operate the breaker due to the circuit loads in combination with the use of the mobile transformer and its associated protection equipment. Once the relay setting issue was identified the relay's settings were incrementally adjusted and additional distribution line protection was installed to allow the relay settings to be set at a level where the Preston load would not trip the mobile transformer's protection equipment. During the event customers experienced several short unsuccessful restoration attempts. The extreme low temperatures resulted in excessive startup loads (inrush current) which resulted in multiple attempts to 1 of 4 re-energize. At 3:06 pm on December 6th the final 90 customers were restored. The graphic below displays the extent and frequency of the outages experienced in Preston for this event. There were no company and one commission customer complaint made regarding the major event. Customer Outage o{t Q9 Events by Restoration 0~ 0 ~ 0 • Restoration Stage CSCC1508175 0 0 value= 1 0 0 • value= 2 co • Restoration St.,ge CSCC1S08185 value= 1 <9 fj ,,. • Restoration St<!lge CSCC1S08255 0 value= 1 e value= 2 • value= 3 e value= 4 ~'~"'~ • Restoration St.,ge CSCC1S08243 value= 1 • Rest.oration St.,ge CSCC1508283 0 00 e value= l cP • Restoration Stage CSCC1508311 0 e vatue: 1 2 of 4 Restoration Intervals Restoration Resources Personnel Resources Internal Crewmembers 5 Borrowed Internal Crewmembers 2 Substation Crewmembers 10 TOTAL 17 State Estimated Major Event Costs Estimate$ Labor Overhead Materials Total Capital $24,740 $3,000 $203 $27,943 Expense $0 $0 $0 $0 Total $24,740 $3,000 $203 $27,943 Major Event Declaration PacifiCorp designates these events and the consequences thereof a major event in accordance with Case No. PAC-E-04-07, where the Commission ordered that the 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 company's 2016 Idaho reliability reporting region threshold is 1,141,067 customer minutes lost (14.82 SAIDI minutes) in a 24-hour period. 3 of 4 Event Details Customers Out vs. Time 2.SOO 2.000 Total Event Su5;t1ined Customer Interruptions: J,417 11/IIIH:JUM J,W Idaho Major Event 0-1------------------------------------------------41111 11/S/U. 11;10 PM 11/'fu; 1:M AM Concurrent Outages vs. Time I 1! j -eonc., ... o.t.aaes -RtltLlm • N«rMI nwesftOM A ..... C,Oft(•ttnt OUtatel O II.cum to Normal 11/6/16 3:51 /,M 111,,u. ,,u t,M 11/6/U. ., .. f,M 11/'/1' 1:M PM Tott! Ems Out.aces· , 0-1---------------------------------------------------J 11/S/U.11:10 PM 111,tu; 1:M AM 11/6/IJ; 3:51 AM 11/6/U. 6:U AM 11/6/1, 11:10 /,M 11/6/1' 1:M PM Customer Minutes Interrupted vs. Time (Cumulative) Tptjl cunomcr Mtmaa lotc:cruescst; 1,849.696 2.000.000 Z._.., CM 1...,,IIM 1 1.800,000 J 1.600.000 ~ a 1 .. 00.(XX) l U/511,11:IDIIM 1.200,000 1l ~ 1,000,000 • ! 800,000 -~UwtCMI ; -MIJ« t.wnt nw•o1c1 j 600,000 • Start nm.of Arst OVt ... lE 400,000 • "-1 Tlffleof l.a,t Out ... 200,000 D Z .. NrCMf o,-----------------------------------------------11/S/1'11:10 PM 11/6/1, 3:51 t,M 11/6/1, ,:22 t,M ut,tu.1:•AM U/6/1' 1:M PM SAIDI, SAIFI, CAIDI by Reliability Reporting Region Please see the attached system-generated reports. 4 of 4 Idaho PacifiCorp Major Events Report Customer Analysis* Sustained Customers Off PC PACIFICO RP 3,417 RMP Rockv Mountain Power 3,417 ID Idaho 3,417 ID MONTPELIER 20 ID PRESTON 3,394 I ID REXBURG 2 1 ID SHELLEY 1 ID SMITHFIELD Customer Analysis 12/5/2016 through % Sustained PacifiCorp Major Event Report Customer Analysis 12/6/2016 Number of Sustained Customer Smin- Customers Off CML Interruptions Count <Smin 3 hrs 0% 1,849,696 10 1,868,631 837 0% 1,849,696 10 1,097,421 837 4% 1,849,696 10 76,971 837 0% 3,996 2 9,753 42% 1,845,294 6 8,044 834 0% 344 1 32,156 2 0% 62 1 26,229 1 0%, Customers Restored by Intervals 3 hrs· 24 hrs -48 hrs -72 hrs· 24hrs 48 hrs 72hrs 96 hrs 2,580 2,580 -- 2,580 20 - 2,560 - •only 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. Customer Interrupted by Date 12/5/2016 through 12/6/2016 Customers Restored by Intervals Date• Number of Average Sustained % Sustained Sustained Customer 5min-3 hrs-24 hrs · 48 hrs· 72 hrs· Customers Off Customers Off CML Interruptions Count <5 min 3 hrs 24hrs 48 hrs 72 hrs 96 hrs 12/5/2016 2,310 3% 1,728,223 2 76,971 2,310 12/6/2016 1,107 1% 121,473 8 76,971 837 270 Data as of 1/4/_2017 120516 ID Final Report numbers.xlsxCustomer Analysis Major Ewnt Only • metric by operatint area customer counts % Sustained Customers Restored in 3 96 + hrs Hours P54 SAIDI SAIFI CAIDI 24% 0.99 0.002 541 24% 1.69 0.003 541 24% 24.03 0.044 541 -- 0% 0.41 0.002 200 -25% 229.40 0.422 544 100% 0.01 0.000 172 100% 0.00 0.000 62 Major Ewnt Only • metric by state customer counts % Sustained Customers Restored in 3 96 + hrs Hours P54 SAIDI SAIFI CAIDI 0% 22.45 0.030 748 76% 1.58 0.014 110 1/19/2017 Idaho Event 12/05/16 throu_g_h 12/06/16 PacifiCorp Major Event Report SSC by State Analysis Month 12/01/16 throu_g_h 12/31/16 tm> mo11 01/0j/_16 through 12/31/16 Major Events Included Major Event Excluded Major Events Included Major Events Excluded• Major Events Included Major Events Excluded• PacifiCorp Major Events Report SSCb_r_State SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI PC-,PACIFICORP ----='--1.37 I 0.005 -256 o.38 1 0.004 1 108 j;;1~o·u;;-;~i~ .Power -, ~ 0.006 11D !Idaho __ -_ -1 24~ 0.045 - ID MONTPELIER 0.05 0.000 --ID PRESTON 23.97 . 0.044 ----ID REXBURG 0.11 0.001 ~--------t ID SHELLEY 0.00 0.000 --ID SMITHFIELD l 3~ 0.36 ' 0.003 : 111 r 5371--0.11 I 0.001 , --203 t-200 544 204 ~- 85 _Q}~~· ~ 0.00 0.000 205 108 SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI SAIDI 26.02 [ 0.152 17~ r 9.1il _o.o_n I 119 I 215.51 ; 1.5n ' )4..!..L 119.1'.U_ 18.15 0.126 144 ---'---- 126.61 0.28 24.47 97.56 0.538 0.003 0.050 0.444 4.29 j_ 0.,_04.!_L 0.00 ] 0.000 235 __ 106 494 t- 220 104 89 10.18 I 12.94 L 0.22 0.50 8.64 -3.58 r o.oo.C 0.097 105 222.89 1.524 0.119 1 109 I 392.02..i_ _ 3.o4o 0.002 95 21.30 0.005 92 40.42 ------0.079 110 251.86 ---- 0.033 109 78.11 -·--------0.000 89 0.3 7 J 0.235 0.248 1.905 0.647 0.004 1461 125.78 1--__. 12~t·152.~ ---;f 91 20.96 163 16.44 . 132 76.13 121· 38~261 87 0.37 SAIFI CAIDI 1.08oj 110 1.124 112 1.i§.U_ 112, ~ 0.232 0.204 0.635 0.287 r 0.004-l 90 81 120 133 87 •may include other regional major event exclusions during the same period. Operating areas are calculated by the state frozen customer count metrics. Data asLof 1L4/2011 120516 ID Final Report numbers.xlsxSSC by State 1/19/2017