20160622Major Event Report.pdf

YHffiOUNTA!N
1407West North Temple
Salt Lake City, Uah 84116RECEiVED
.J[ii Jir]i 22 AH 9: 38
' ' ;; l-l^Jwrc22,20r6 , - .i:riii.iEstou
VA OVERNIGHT DELIWRY
Jean D. Jewell
Commission Secretary
Idaho Public Utilities Commission
472West Washington
Boise, Idaho 83720-5983
RE: Rocky Mountain Power Major Event Report
Dear: Ms. Jewell
Rocky Mountain Power is requesting designation of the May 9, 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
l,ll4,l49 customer minutes lost in a24-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].
'$:4u" n.,"1r,,*1a;
Douglas N. Bennion, P.E.
Vice President
Engineering Services & Capital Investment
cc: Rick Sterling,IPUC
Bev Barker,IPUC
Report to the ldaho Public Utility Commission
Electric Service Reliability - Major Event Report lD-16-1
Event Date:
Date Submitted:
Pri ma ry Affected Locations:
Primary Cause:
Exclude from Reporting Status:
Report Prepared by:
Report Approved by:
May 9, 2016
June27,2OL6
Rexburg and Shelley
Wind storm/Loss of supply
Yes
April Brewer
Heide Caswell / Dan Bodily / Ken Short
Event Description
On May 9,20L6, Rexburg, ldaho experienced a wind storm coupled with equipment
damage at a substation resulting in a loss of substation event. The storm caused several
localized outages causing lines to contact, blowing fuses and tripping circuit breakers. ln
some cases the wind caused damage to facilities breaking crossarms and poles. The
most significant outage of the event was a loss of supply event which occurred at the
Rexburg substation. The outage affected 24,703 customers in the Rexburg area,
impacting 10 substations and 30 circuits. Of the customers who experienced an outage
L5,246 customers were out for 7 minutes,2,77L customers were out for an hour and a
hall and 6,686 customers were out 2 hours 7 minutes. During the day 85% of all
customers minutes lost and 95% of all customers who experienced an outage were the
result of the loss of supply event. Wind and tree related outages accounted for L3% of
all customer minutes lost and 4% of all customer experienced outages. Of the outages
which occurred 98% of customer were restored within 3 hours with longest outage
lasting 12 and a half hours, affecting l customer, due to a car hit pole in Rexburg.
5l10lt6 12:00 AM
TofI
l,t)ody, IdahoELe! ?(N0 ft. I.EL Statiatica
Eagtn llatc/rlm
I'lag 9, 2016
:00 LST
Erd D.t /TltE
MaU 10, 2016
:00 LST
i&.tin xfud e,.t
mph
||il.. I ltLn.
37 14
f,ur{r
16.8
tllltra l 2 ! r r a, r l !0rr!!tll{l! L t?tlrt2t2Lztul aid lld lid ltd llry ltry ir lla llc lti llo nry ie i.t ia ir ie lllr iq ia lta lle lkfl iq itt i-r-r-i I t t t I I t t t I I I t t t t t I I laIlr o! D? trttl l,&[rtr loq ot lblia 2016XEiEE Ilnd Gurt
htto://www.raws.com
Restoration Summary
On the late morning of May 9,20L6, high winds and wind-borne dust in the
Shelley/Rexburg area of ldaho began impacting the electrical system. As the day
progressed, wind-related outages accumulated. High winds damaged trees and
branches which broke poles, crossarms and other hardware throughout the area. In
addition, the wind caused several lines to contact, operating fuses resulting in additional
outages. Local area crews worked around the clock restoring power to customers.
ln addition to the wind related outages, a substation insulator was damaged on the 12
kV bus that caused a fault within the Rexburg substation, de-energizing circuits across
the area; it is hypothesized that either recent lightning storms or the large amount of
dust precipitated the insulator failure. The outage was handled with joint resources
from the area substation group and field operations trouble shooters. The greatest
challenged faced during the restoration process was getting replacement parts to
Rexburg as soon as possible. Area dispatch was able to quickly identify switching orders
in an effort to rapidly restore feeds. As a result 62% of all customers affected during the
loss of supply event were restored in 7 minutes, with all customers restored in just over
2 hours. Crews repaired the damaged insulator in just over 2 hours.
There were no company or commission customer complaints made regarding the major
event.
Restoration lntervals
25,009 25,609 400 0
2of2
Restoration Resources
State Estimated Major Event Costs
Major Event Declaration
PacifiCorp designates these events and the conseguences 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
company's 2016 ldaho reliability reporting region threshold is L,L4L,O67 customer
minutes lost (14.82 SAIDI minutes) in a 24-hour period.
Approximate Line Feet (conductor)3,832 ft
Poles (Distribution)L7
Crossarms 25
3of3
Event Details
CwtomcrsOutw.Tlmc
-mOcaHo-mon
alat l-L.fr.r Itil
2o.0t
[",-€d ro-
5,!m
ldaho Maior Event
il
s
er
Concurcnt Outagcs w. Tlmc Ists!.gE$9ldlrlli r.
ao
l3
30
25
a
l3
l0
t
0
i-ffiO-aE
-aambhillllrrata Hc{drtali.
O llmbl..illl
EtI
I
t/rorta rrrorfl
Custqnc, ManutGs lntcrruptad 15. Tlm! (cumuhtlvcl
,T
Eaii
EI!II
tIoq,o
Laom
tr00,o
!roq,fir
a@,q,
5aD,O
ao,@
-dra!l.fl
-radrlrrftfrla hltr.Chorqr
a mhcuoqt
I *rfl
r&*flrJ.|0s
vrolral.}mAm
0
srtlrau|oAm
SAlDl, SAlFl, CAIDI by Reliability Reporting Region
Please see the attached system-generated reports.
ooo)
o
.9,o.>(!c
o
Eoaaox6ttoooE
(E
.El!
co)
uJ
o.o'
=(o
oorooo
Eo
odoE
oE(Eooc
o,c
fEoc.o
CDE
0)=o
.E
I,
E
=oooo
o!
oEs.9
€oco
o,
oto
Eo
ool6
o!,fo.g
oEqooo
c
=o=q
o(5CL
.Eo
0)
EoEoIDo.o
Co
(n
c(n
=o
co
E
s
o
d
c d)
6
EE.sgESEi;iETE$UO4cd
dcao
3+66r
ieIs
ix
gR
iei*
r.EAq'
'Er
ooqnN
E
E
h
o
@
cfgE
gE<9:U
roE
teE
€EEf=ozoE
o
E
oFo
EcEO
sEsq)
)q rJ
>!
Eg
EE=
o
E(
*o
Ga
r!
o
gr
6
3
r ooN 6 @o
re qo
Nqo oc,Eo
o
Eo
@@\o
Nco
cl @ho
on dla
oqo co
oq
+
{u!N
ESsaEEEE;ETEuUOrGts
6o
d@o d6o x
4
xo xoo x€
+G6
.), c
Xt
,1, e
gS
J,e
sS
e.:Aq.<t 8
ooq
oo N N 6o
i:
6
oo@ui
oo@.
NN @ouiN
IN
EE
@
@
€
I
6
@
o
@
E:t
E
o
Eo:
@q;@oq
N+.Noo.
ro('r \o
$q6
@o
.,i
oNNoN
EEfzqE
o 6 o @@ o
=
oNooq
otsoo'
+.
oNo)o
a
Nn@
o @\r
dl
occq
EeEO
EESq=XL,
x >s x >eo xo x x
!E
EE=
68
Ei
o8o'
o
E@N
+
U;
(
\ta)R-5s& E8E<Eg bE-* E
SE(,
e
OEogIU
o
'o4
.Eo
C30
=t
o
CtC!
4r
rqF2o:
zoF
ca
(,c
a!xrc
4
trI
{JA
&
=c,c o a 6 o
oTLotr
C .'1toto>arIJ EbI'ep
=so.Eboo
'6
TEo.
ffi
",ffi
'rw{!ffi
.v1: - -,4::.,I
: '{l
N6N6MN,o'd o NdHd
:::
r, n o'oi aoN,@oon q n:q qo o oro o
rN$Nd6N@6d> ^i d:r ct
Ot d
l
ooqaoo
.j u)
o
N@dlo
oo)
@
@oqoo
qo
q
o
@N
oro
o
ui6
o o:$:@ mN O,r O N*H
NOO@rON:O,@Oi o t,o oci ci ct: ct, ci
-, - ^:-: *oNo9drlnuidici
I
@ci
4
Io,
roq\o
alr
=6
lo\
a
ei
lqlaE:
{
a{
o
E
E
a
E
oo +r c: lo i @lmlool O .Or+ro:O 6Jl i Hrd :i d
t) l,
6, d @r*lo:o -o600+No:ooooood cir o o'cild ci
I
@om@@@o6<@66@Oo € o o,m N o
oco
Nn)
ooa
EoE:gc
cg{
oE:
o
E
o9$hi€{6 60c606d d d d :d H
6dooro9do6dOO@6OHNcOO6OOo o o o o o:o o
Nd6d@+60\ a \ ol o).!,4 q
i. @ @ O O,i:o OM+NN
tra
a
\o
S
So
tUI6
G
(o
SR
6
co.:
caB
{
a{
o
E
6
3
N 6 '@'mmo
6N601 dooooi d i,o
60q4dl ,ido:
r
aa
!a
E
o
GE
6
5
Nr d96mn
N60Nm6eqd)ooo
N$O\ oq d')HNA d
d o o:o:o o N.o.aedlqoooo
N O m: @{ o o: o
@oaNqcdloqO O r: O
L
oa
o3Gtt
to
s&qflE*dEgiEIU(Jq.\t^ora
E'
E
d:q3iz(9- !,1+ o q i.*
=',difa u x1 u =<F-u---z
lo :oI td1E,.6
=loioIEto]U
rO,3 -- 9lX 6i:rl
i4:uE.o o ololo
o
Go
"oOooxa.x
Eoo-()d
o.ct!
co
UJ
o'c.
@
o,oooo
.9
oE
c,o
@Eo
f
co
o
o
G
o
!
!o
!fll6
o
G
oo
6ua
Goqori
'trooo
Eo
@t
@tr)!
a
'6f
o
Eo
@
o
@
E6c
.9@o
aE6a!
=.E
oE
EoCLot-.e
eE'lrJ tXe
(!'H
=iaCLrrx66u,E()(!
o-