20140123Major Event Report.pdf

VROCKYMOUNTAINYpantee\ rorusrorormsRcoar
Rick Sterling,IPUC
Bev Barker, IPUC
M,k[ov^an/T<
Vice President, Regulation
Enclosures
l-i.'---
l407West NorthTemple
Salt Lake City, uah 84116
Stli, !::-! r1;-,'i ;..'..;: i r.i
,l-",, , -,:1,'," .I i;..: ii
,:, ! lij: t2
January 23,2014
VA OVERNIGHT DELIVERY
Jean D. Jewell
Commission Secretary
Idaho Public Utilities Commission
472West Washington
Boise, Idalro 83720-5983
RE: Roclry Mountain Power Major Event Report
Dear: Ms. Jewell
Rocky Mountain Power is requesting designation of the December 4, 2013 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-how 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,
Report to: Idaho Public Utilities Commission
Electric Service Reliability - Major Event Report ID-13-5
Event Date(s):
Date Submitted:
Primary Affected Location(s) :
Exclude from Performance Reports:
Report Prepared by:
Report Approved by:
December 4,2013
January 24,2014
All Operating Areas
Yes
Diane DeNuccio
Heide Caswell
Event Description:
In late November 2013, Rocky Mountain Power identified a need to inspect and maintain a Goshen
substation breaker whose family's operating history had been somewhat unreliable. The reliability
coordinator and the company evaluated a variety of scenarios and determined that the maintenance
would be scheduled, but if certain parameters occurred, might result in load shedding operations to
maintain the reliability and integrity of the bulk power system.
On December 4, 2013, in the early hours of the morning, the company and the reliability
coordinator determined that conditions were moving in such a way that load shedding may be
required. Then, as temperatures continued to fall, moming loads began to build, and local wind
generation resources abated, it was determined that load shedding actions would be necessary to
maintain the integrity of the bulk power system. Those actions were invoked.
Rocky Mountain Power requests the designation of this event and the consequences thereof be
classified as a major event and excluded from its reliability performance results as it exceeded the
Company's 2013 major event threshold of 1,1 l4,l4g customer minutes lost in a24-hotx periodl.
Idaho SAIDI Minutes Excluded 262.8 Sustained Customers Off 61,666
Customer Minutes Lost 19,959,188 Sustained Intemrptions 130
Through the morning and into the afternoon, load was restored as conditions allowed. Actions
taken to enable load restoration included increasing local hydro generation, transfer of customer
load to other transmission providers and reconfiguration of the transmission system in the area. The
company notified IPUC staff throughout the day with each stage of restoration.
I In docket PAC-E-04-07, the company and commission agreed that determination of major events will be made by
applying IEEE Standard 1366-2003, wherein a statistical outlier for these extreme events is based on state daily SAIDI
thresholds; the 2013 calculated Idaho SAIDI is 14.67 minutes, which equates to a threshold of l,l 14,l49customer
minutes intemrpted in a24 hour period.-l-
ldaho December 4,2OL3 Major Event - Load Shed
-
Customers Out
-Cumulative
CML
-lrf
heul lhss5h6ld
=oe
E 3ooooo
3
Peak Customers Out: 49,113 @ 8:50a.m.
[-\ r
d \
\
t t-
1s000000 IJ
o:
,E
=o
Eo
rooooooo $
L2/4lL? O:OO LU4IB 6t00 r2/41L3 L2:00 Lzl4lL3 L8tO0 tzl'lBot}O
Estimated Major Event Cost:
This event did not generate significant incremental costs to the company.
SAIDI, SAIFI, CAIDI Report: Attached
*
o(\
NN
CI tr
Fi
c
c
Eh
trEc
!
Co
s $a
$
c
c
tr
lI:tl
rc
rla ts
|J:
(\t
tr
ta)co ro
Nc?
o t
qo|(
F
rto
F-
s
o)
@-
(v)t\ot
cco(\
c
L=so s
o,
sq
s*N|o
@-
@N
cFo6c
E
IU
Jul otrld]xI,Utf
ufal
C
E
EIi
U,
.9.o
.Ec
o)
Eo6foo
!ioN
d)oNEoo.0)t
.E
.ETL
co
uJ
o'(!-'
=!toN
1r
Et!Io
Et
6
fE$Eu
HSfE*
st4)
@opll.E
2o
Ng
i(v
2o
SgIv
{ro
EE+oN!l
o2
o$
i{u
ct
tro
=LE.Ero
A
o,
loE
UE
$E=
iE6
o
G!
Ego
o
o
E
o
Eo
o
i',
EEE
E.;E
J.o
,t,,
uP99.HE=
EE
EEE99'oa)
o
t!o
)
2
o
u
or!
E
o
ao
lraa
o
(h
o
Ll, ooos
E Ei*
@oellE
9o
Ng
i{v
2o
$g
f[v
IIo
E
o
oo
o
ootIo
Eo
E)
epSE!iON+
oQ
o$
![g
d,vElt
E.E
ro
A
rotr
I'E
F,N
C,
F
b
o
ntN
C,I
Io
i(
IEo
o:)
oboq=Eb=
EE6
6bt 5; E=.Ct.!=
EHe
=o
-E-*EEE
o6
EE
EEE930U,o
fi
oN{6
NOF(E!9o
oN
o
N
o
.E *'qSEE
si;
HEE
Hrrr6q.3 o
Eo
CLotr
c.g.og)>+lu8bI'aE
=so.EEoo
'6
(Eo.
\toN$lN
N n,
6o6
rE t,(
qFF(c
a
ra(loro
@oq
c)
oo Fo
(o rt
rr)q
6
I
r(ra
o.
E*
(v)E
,
a
(E p
c D
j
!c
C
f
N oryD
ra
r
C4-
{
a {(
Ii
G((c
n
Ccc
tr
tr
t E
Fc c
E F
{
Uo
z:,lIII
'I
I 1IIu
(s
6)
oo
l)ooU)e*o
AI
(")
o(\t
EoCLo)c.
6
.ELL
co
UJ
o'a
to$l
Lr
n
Fn
F
so
Qc
n
Fa
3
tF3
I
:
!
€
Q
ttq
cC
lr
c
G
cac
Ir
o
o
o
toT
(
E
u
co
lr
c(t
o
(,
Ir
an
o
o
n
Fn
F
o
Qc
n
F3
F
E
EoE
tqt
c
J.q
o{
s(t
E
o
o
o
E
o
tot
Cc
u
cot
sc:
o
o
lr
o
o
o
nF
CI
F
tro
Qtr
DF
C,
o
tat
c{
u
q
o
(,
Ir
o
cc o
at
!C!
cc
q
co
lr
.sc
c
c
lr
u
c
u
c,oc{+C'NOFE99ooN*o
N
oiEG'C=E
s H!ot-Eo2oEr{$
Eo
CLotr
tro.^EgL(E
Ee
ncn
oo
'6
oo-
o
(Ea
lloU)U)e*o
c\I
(v)
o(\t
oo-otr
6
.EII
tro
uJ
o'd'
=!toN
lr
.)
Ft)
o
oc
nF
F,
Fc
ll,N
r
coc
c
Iq
o{
c
a5
o
o
o
6
o
tI:
Ci
sJ.
sR
o
o
tr
{,
o
an
nF
n
NF
o
o
$
F
N
E
Eo
E
o
o
tr
o
o
o
c
o
o
l!
o
o
o
Llq
o
!
o
o
IL
o
o
o
cob
o
q
o
o
o
l!
o
e$5
E
an
G'
oN{o
O=rEt9arcN{c
N
o
HEEc
s EiJrzE o*t)Esb+>
UI
o
CLotr
tro,^ngL(Boc'as
=deq
oo
'6
(E
o-