20161026Major Event Report.pdf

October 26, 2016
VIA OVERNIGHT DELIVERY
Jean D. Jewell
Commission Secretary
Idaho Public Utilities Commission
4 72 West Washington
Boise, Idaho 83720-5983
RE CEIVED
2016 , T 2 6 AM 9: I 9
1407 West North Temple
Salt Lake City, Utah 84116
RE: Rocky Mountain Power -August 29, 2016 Major Event Report for the outage
caused by loss of transmission service to the Rexburg, Rigby, and Thornton
Substations.
Dear Ms. Jewell:
Rocky Mountain Power is requesting designation of the August 29, 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 [phone].
Sincerely,
~~~IJ~
Douglas N. Bennion, P.E.
Vice President
Engineering Services & Capital Investment
cc: Matt Elam, IPUC
Bev Barker, IPUC
Enclosures
Report to the Idaho Public Utility Commission
Electric Service Reliability -Major Event Report 10-16-3
Event Date:
Date Submitted:
Primary Affected Locations:
Primary Cause:
Exclude from Reporting Status:
Report Prepared by:
Report Approved by:
Event Description
August 29, 2016
October 26, 2016
Rexburg
Loss of Transmission
Yes
April Brewer
Heide Caswell/ Dan Bodily/ Ken Short
On the morning of August 29, 2016, Rocky Mountain Power customers in Rexburg, Idaho, experienced
an outage when one of the three phase conductors on a 69 kilovolt (kV) transmission line failed and
fell to the ground. The event affected 16,491 customers, or approximately 51% of the customers
served in the Rexburg area. Of the customers who experienced an outage, 92% were restored within 3
hours.
Event Outage Summary
# Interruptions (sustained) 20
Total Customer Interrupted (sustained) 16,703
Total Customer Minutes Lost 1,650,852
State Event SAIDI Impact 21.45 Minutes
CAIDI 99
Major Event Start 8/29/16 12:00 AM
Major Event End 8/30/16 12:00 AM
Restoration Summary
At 5:16 a.m. on August 29, 2016, the conductor on a 69 kV line failed when vibration and wind caused
the line to wear and break at the insulator; causing the circuit breakers to trip at three substations;
Rexburg, Rigby, and Thornton. Combined, these three substations feed 12 circuits, which supply power
to 16,941 customers. Crews were contacted and dispatched to the area to assess the outage and begin
restoration activities. At 6:32 a.m., power was restored to the Rexburg and Rigby substations,
restoring service to 15,189 customers. The remaining customers fed from the Thornton substation
remained out until repairs were made. At 8:31 a.m., the first restoration out of Thornton occurred to
15 customers. At 11:35 a.m., the final 1,287 customers were restored.
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There were no company or commission customer complaints made regarding the major event.
Restoration Intervals
Restoration Resources
Personnel Resources
Internal Crewmembers 8
Borrowed Crewmembers 1
TOTAL 9
State Estimated Major Event Costs
Estimate$ Labor Contracts Materials Total
Capital $0 $0 $0 $0
Expense $4,015 $0 $730 $4,745
Total $4,015 $0 $730 $4,745
Major Event Declaration
PacifiCorp designates this event and the consequences thereof a major event in accordance with Case
No. 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 company's 2016 Idaho reliability reporting region threshold 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 Idaho Major Event
Total Event Sustalnfd Customcc lntacuoUons; 1,,103
18,000
16,000 -customertOUt
•,... Cusconwn Out 14,000 .latflt lleltorlldon T1ffle
d z:
12.000
10,000
I 8,000 tc a 6,000
4,000
2.000 l 0-1----------.-..l.--------~----==~-----,----------,----------.cil
1/1.9/16 12:00 AM 8/29/16 4:41AM
Concurrent Outages vs. Time
12 -Co!lc....--
-Mtum to Norffllt Thretnold
.a. ,_ concurrent ouuic­
o a.tum to Nonnal
8/19/16 9:36 AM 8/29/16 2:2A PM 8/29/16 7:12 PM 1/!0/16 12.-00 AM
Total Event Outages; 20
1/29/166:31 AM
0 -1----------.--'---------~----....... -'-----'---.-'--------'---,----------
8/29/l6l2:00 AM l/29/IH:.9AM 8/19/16 9:36 AM l/l'J/16 2:2A PM 1/29/16 7:12 PM 1/!0/16 12:00 AM
Customer Minutes Interrupted vs. Time (Cumulative)
Total Customer Mlnytes Interrupted: 1,650,852
1,800,000 1/29/165:16 AM 2'-llrCMI l"50,IS2 -1 1,600,000
.!i 1,400,000 -CunM,1 .. dwCMI ~ -Major &fflt Tiu_..old a 1,200,000
'1l .., • sun-olRnlOUIIP
1S. 1,000,000 • sun-o1i...t0ut1P
i a 24-HrCMI
s 800,000
-1/29/166:tl llM
;: 600,000 j
~ 400,000
200,000
0
8/29/16 12:00 AM 1/29/16 4:41 AM 8/19/169:36 AM 8/29/16 2:24 PM 1/29/16 7:12 PM l/!0/16 12:00 AM
SAIDI, SAIFI, CAIDI by Reliability Reporting Region
Please see the attached system-generated reports.
3 of 3
Idaho 8/29/2016
PacifiCorp
Major Events Report Sustained
Customer Analysis* Customers %Sustained
Off Customers Off
PC PACIFICORP 16,703 1%
RMP Rocky Mountain Power 16,703 2%
ID Idaho 16,703 22%
ID MONTPELIER 161 2%
ID PRESTON 18 0%
ID REXBURG 16,513 51%
ID SHELLEY 11 0%
ID SMITHFIELD -0%
PacifiCorp Major Event Report
Customer Analysis
customer Analysis
throuati 8/30/2016 Customers Restored by Intervals
Number of
Sustained Customer Smin-3 hrs · 24 hrs-48 hrs -72 hrs-
CML Interruptions Count <5min 3 hrs 24 hrs 48 hrs 72 hrs 96 hrs
1,650,852 20 1,868,631 -15,400 1,303 -- -
1,650,852 20 1,097,421 15,400 1,303 - --
1,650,852 20 76,971 -15,400 1,303 -
16,001 1 9,753 161 - - - -
300 1 8,044 18 --
1,633,337 16 32,156 15,210 1,303 - -
1,215 2 26,229 11 -
--789 - --- -
*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
8/29/2016 throu&h 8/30/2016 Customers Restored by Intervals
Date• Sustained Number of Average
Customers % Sustained Sustained Customer Smin-3 hrs -24 hrs-48 hrs-72 hrs-
Off Customers Off CML Interruptions Count <Smin 3 hrs 24 hrs 48 hrs 72 hrs 96hrs
8/29/2016 16,703 22% 1,650,852 20 76,971 -15,400 1,303 - - -
Data as of
9/2712016
082916 ID Final Report numbers.xlsxCustomer Analysis 2
Major Event Only ·
metric by operaUnt arM customer
counts
% Sustained
Customers
Restored in 3
96+ hrs Hours PS4 SAIDI SAIFI CAIDI
92% 0.88 0.009 99
92% 1.50 0.015 99
92% 21.45 0.217 99
100% 1.64 0.017 99
-100% 0.04 0.002 17
-92% 50.79 0.514 99
-100% 0.05 0.000 110
-- --
Major Event Only ·
metric by stale customer counts
%Sustained
Customers
Restored in 3
96+ hrs Hours PS4 SAIDI SAIFI CAIDI
92% 21.45 0.217 99
10/25/2016
Idaho Event 08/29/16
Major Events Included
PacifiCorp
Major Events Report
SSC by State SAIDI SAIFI CAIDI
PC PACI Fl CORP 1.06 0.012 91
RMP Rocky Mountain Power 1.62 0.019 87
ID Idaho 21.45 0.217 99 -
ID MONTPELIER 0.21 0.002 99
ID PRESTON 0.00 0.000 17
ID REXBURG 21.22 0.215 99
ID SHELLEY 0.02 0.000 110
ID SMITHFIELD
through 08/30/16
Major Event Excluded
PacifiCorp Major Event Report
SSC by State Analysis
Month 08/01/16 through 08/31/16
Major Events Included Major Events Excluded•
SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI
0.18 0.003 65 12.28 0.121 101 9.83 o.o9iT 108
0.12 0.003 34 10.95 0.108 101 9.45 0.093 102
I 34.58 0.363 95 13.14 0.146 90
0.85 0.012 71 0.65 0.010 l-65 ---~ ----' 0.68 0.035 20 0.68 0.035 20 ---31.20 0.304 103 9.98 0.090 111
1.85 .9.:.Q.!3... 154 1.83 0.012 154
0.00 0.000 64 0.00 0.000 64
•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
9/27/2016
08291610 Final Report numbers.xlsxSSC by State 3
YTD FY2017 Ol/01/16 throuah 08/31/16
Major El/etlts lndudtttJ Major Events Excluded•
SAIDI SAIFI CAIDI SAIDI SAIFI CAIDI
139.66 1.024 136 83.31 0.742 112
-147.91 1.051 141 86.05 0.750 ~
r-
224.46 . 2.142 105 98.21 0.883 111
10.23 , ~ 77 9.94 0.130 77 -
13.23 0.167 79 13.22 0.166 79
134.75 1.288 105 47.94 0.384 125 -·-65.91 0.552 120 26.77 0.200 134 --0.34 0.004 94 0.34 0.004 94
10/25/2016