20180329PAC to Staff UT DPU Set 22 (1-25) (3).pdf

1407 W.North Temple
ROCKY MOUNTAIN Salt Lake City,UT 84116
POWER
A DIVISION OF PACIFICORP
March 15,2018
Erika Tedder
Division of Public Utilities
160 E 300 S,4th Floor
Salt Lake City,UT 84114
[e-mail]
eted_derglutah.gov (C)
RE:UT Docket No.17-035-40
DPU 22nd Set Data Request (1-25)
Please find enclosed Rocky Mountain Power's Responses to DPU 22nd Set Data Requests 22.1,
22.3-22.5,and 22.7-22.9.The remaining responses will be provided separately.Also provided
are Attachments DPU 22.4 and 22.5.
If you have any questions,please call me at [phone].
Sincerely,
Jana Saba
Manager,Regulation
Enclosures
C.c.:Dan Kohler/DPU [e-mail](C)
Aliea Afnan/DPU aafnan@,daymarkea.com (W)
[e-mail] (W)
Dan Peaco/DPU [e-mail] (C)(W)
Kevin Higgins/[e-mail] (C)
Neal Townsend/UAE [e-mail](C)(W)
Gary A.Dodge/UAE [e-mail] (C)
Phillip Russell/UAE [e-mail] (C)
Philip Hayet/OCS [e-mail] (C)
Béla Vastag/OCS [e-mail](C)
Sophie Hays/UCE [e-mail](C)
Kate Bowman/UCE [e-mail](C)(W)
Emma Rieves/UCE [e-mail](C)(W)
Lisa Tormoen Hickey/[e-mail] (C)
Mitch Longson/Interwest [e-mail] (C)
Nancy Kelly/[e-mail](C)
Jennifer Gardner/WRA [e-mail](C)
Penny Anderson/WRA [e-mail] (W)
Peter J.Mattheis/Nucor [e-mail] (C)
Eric J.Lacey/Nucor [e-mail] (C)(W)
William J.Evans/UIEC [e-mail]
Vicki M.Baldwin/UIEC [e-mail](W)
Chad C.Baker/UIEC [e-mail] (W)
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.1
DPU Data Request 22.1
Vail Second Supplemental Direct.Referring to Exhibit RMP_(RAV-2SS)Page 19 of
35:
(a)Why did the Company include System Impact Study Report for Uinta II in this
second supplemental testimony?
(b)Refer to 'Response to DPU Data Request 14.2'submitted on January 26,2018.The
response indicates Uinta project as Q715.Why was the Uinta II project (Q8 10)
omitted from the above-stated Data Request 14.2 response?
(c)Please confirm that all analyses performed by the Company to determine the
combined benefits of the selected wind projects (includingeconomic analysis)
include Q810.
Response to DPU Data Request 22.1
(a)The short-listed Uinta project includes both the Q0715 and Q0810 interconnection
queued positions.
(b)The initial system impact study (SIS)report for the Q0810 Uinta II queue position
was not complete at the time of the response,and it was an oversight not to note
that in Response to DPU Data Request 14.2.
(c)Confirmed.
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.3
DPU Data Request 22.3
Vail Second SuovlementalDirect.Refer to lines 74-77:
(a)Please indicate/confirm the OATT section that supports the statement that a restudy
would not be required for a project with an executed LGIA but with a commercial
operation date in the future.
(b)In the past,have there been queue projects from the interconnection queue that were
restudied after their LGIAs were executed but before their commercial operation
date?
Response to DPU Data Request 22.3
(a)The standard large generator interconnection agreement (LGIA)in PacifiCorp's Open
Access Transmission Tariff (OATT)does not contain a mechanism for the
transmission provider to unilaterallyrequire a restudy for a change in assumptions.
(b)Yes.These studies were required based on a change requested by the customer,such
as a change in turbine type.
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.4
DPU Data Request 22.4
Vail Second SupplementalDirect.Refer to lines 60-64:
(a)Please provide specific 'restudy reports incorporating the updated assumption
regarding the staging of Energy Gateway West'that 'showed that interconnection
projects located in eastern Wyomingwith an interconnection-queueposition greater
than Q0712 trigger the need for Energy Gateway South'.
(b)Please indicate the sections in the above-stated 'restudy reports'that specifically
identify the need for 'Energy Gateway South'components for queue positions greater
than Q712.
Response to DPU Data Request 22.4
(a)Please refer to Attachment DPU 22.4 which contains the system impact study (SIS)
for Q0713.
(b)Section 7.1.3.
17-035-40/Rocky Mountain Power
March 15,2018
DPU Data Request 22.5
DPU Data Request 22.5
Vail Second SupplementalDirect.Refer to lines 18-22,133-139:
(a)Please provide the updated Aeolus West transfer capability study that demonstrates
the ability to interconnect 1,510 MW of new wind capacity in southeastern Wyoming
behind TOT4A.
(b)Please list all new wind resources that make up this 1,510 MW of incremental wind
generation.
(c)Refer to 'Response to DPU Data Request 14.17'submitted on January 26,2018.
Would 240 MW qualifyingfacilities (QFs)be included in the updated Aeolus West
transfer capability study provided as a response to part (a)of this request.
Response to DPU Data Request 22.5
(a)A copy of the preliminarydraft of the updated Aeolus West Transmission Path
Transfer Capability Assessment report (completed on February 12,2018),which
demonstrates the performance of the Aeolus West transmission path by utilizingthe
2017R Request for Proposals (2017R RFP)shortlist resources is included in
Attachment DPU 22.5.
(b)New wind resources that make up the 1,510 megawatts (MW)of incremental wind
capacity include new wind resources east of the Aeolus West transmission path,
specifically:
Q542 240 MW -Frannie-Yellow Tail 230 kilovolts (kV)line (Bighorn Basin)
Q706 250 MW -Aeolus 230 kV
Q707 250 MW -Shirley Basin 230 kV
Q708 250 MW -Shirley Basin 230 kV
Q712 520 MW -Windstar 230 kV
(c)As noted on Table 1 of the draft report referenced in the response to subpart (a)
above,the 240 MW qualifyingfacility (QF)was included in the updated Aeolus
West transfer capability study.
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.7
DPU Data Request 22.7
Vail Second Supplemental Direct.Exhibit RMP_(RAV-3SS)Page 15 of 40:
Please explain the statement 'Zero (0)MW can be delivered on a firm basis to the
Transmission Provider's network loads with additional transmission modifications'.
Response to DPU Data Request 22.7
The word "no"was erroneouslyomitted.The statement should read as follows:
Maximum Amount of Power that can be delivered into Network Load,with No
Transmission Modifications (for informational purposes only)
Zero (0)MW can be delivered on a firm basis to the Transmission Provider's network
loads with no additional transmission modifications.
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.8
DPU Data Request 22.8
Vail Second Supplemental Direct.Exhibit RMP_(RAV-3SS)Page 35 of 40:
Please explain the statement 'Zero (0)MW can be delivered on a firm basis to the
Transmission Provider's network loads with additional transmission modifications'.
Response to DPU Data Request 22.8
Please refer to the Company's response to DPU Data Request 22.7.
17-035-40 /Rocky Mountain Power
March 15,2018
DPU Data Request 22.9
DPU Data Request 22.9
Vail Second SupplementalDirect.Exhibit RMP_(RAV-4SS)Page 17 of 23:
Please explain the statement 'Zero (0)MW can be delivered on a firm basis to the
Transmission Provider's network loads with additional transmission modifications'.
Response to DPU Data Request 22.9
Please refer to the Company's response to DPU Data Request 22.7.