20171006PAC to Staff 36-37.pdf

O O
ROCKY MOUNTAINPOWERmvmoNOFacoco"1407 W North Temple,Suite 330
Salt Lake City,Utah 84116
October 6,2017
Diane Hanian
Idaho Public Utilities Commission
472 W.Washington
Boise,ID 83702-5918
[e-mail](C)
RE:ID PAC-E-17-06
IPUC 3rd Set Data Request (36-37)
Please find enclosed Rocky Mountain Power's Responsesto IPUC 3rd Set Data Requests 36-37.
Also provided on the enclosed Confidential CD is Confidential Attachment IPUC 36.
Confidential information is providedsubject to the protective order in this proceeding.
If you have any questions,please feel free to call me at [phone].
Sincerely,
J.Ted Weston
Manager,Regulation
Enclosures
C.c.:Ronald L.Williams/PIIC [e-mail] (C)
Brad Mullins/PIIC [e-mail] (C)
Jim Duke/PIIC [e-mail] (C)(W)
Kyle Williams/PIIC [e-mail](C)(W)
Val Steiner/PIICval.steiner agrium.com (C)(W)
James R.Smith/Monsanto j _i_th@monsanto_.ço_m (C)(W)
Brian C.Collins/Brubaker&Associates [e-mail] (C)(W)
Maurice Brubaker/Monsanto [e-mail] (C)(W)
Katie Iverson/[e-mail] (C)
Eric L.Olsen/IIPA [e-mail] (C)
AnthonyYankel/IIPA tony yankel.net (C)
Randall C.Budge/Monsanto [e-mail] (C)
Thomas J.Budge/Monsanto [e-mail] (C)(W)
PAC-E-17-06 /Rocky Mountain Power
October 6,2017
IPUC 3rd Set Data Request 36
IPUC Data Request 36
In reference to the new 300MW wind resource identified as I WAE WD T in the
SO model summary report named SO Portfolio SENS-RPN-ÈEN-
MM 1705241827and identified as I_WAE_WD T2 in the PaR summary report
named PaR Stochastic Summary PSens-RPN-EEN-MM 1705281550:
(a)Please provide a detailed description of this new wind resource includingbut
not limited to where it is located,which substation it would be connected
with,the time frame it is available for the SO model to select as a resource,
and the amount of capacity available for the SO model to select.
(b)Please explain the negative values for fixed cost in the modeling reports.
(c)Please provide details on the cost estimates found in the SO Portfolio SENS-
RPN-EEN-MM_1705241827 file in the PVRRByStation tab on lines 1974-
1981.This should include but not limited to the performance and cost
attributes from the supply-side resource options,and any other input cost
assumptions used to create the values for each line item that shows a value.
(d)If this new wind resource is located in the Aeolis Wyoming area,please
explain how this resource would impact the transmission congestion in the
area?
Response to IPUC Data Request 36
(a)The System Optimizer model (SO model)includes up to 300 megawatts
(MW)of Wyoming proxy wind as part of the supply-side resources available
for selection at various locations and times.The Wyoming proxy wind
identified as I WAE WD T is located in the Aeolus node of the 2017
Integrated Resource Plan (IRP)topology,available for selection in 2021.The
Planning and Risk (PaR)model inherits the SO portfolio,including the same
300 MW of Wyoming proxy wind.Substations within topology nodes are not
modeled,however the Wyoming proxy wind is defined as being located
behind the TOT 4A cut-plane.
(b)Fixed costs for the Wyoming proxy wind resource are net of the production
tax credit (PTC)benefit,resulting in a negative fixed cost.This is simply a
modeling convention as there is no separate input stream for PTCs.
(c)The generic proxy resource options available in the SO model are detailed in
the Company's 2017 IRP,specifically Chapter 6 (Resource Options),Table
6.1 (2017 Supply Side Resource Table)and Table 6.2 (Total Resource Cost
for Supply-Side Resource Options).The Company's 2017 IRP is publicly
available and can be accessed by utilizingthe followingwebsite link:
PAC-E-17-06 /Rocky Mountain Power
October 6,2017
IPUC 3rd Set Data Request 36
Additionally,refinements were made to the 2021 generic Wyoming wind
proxy resource,as indicated at the bottom of the referenced tables.Please
refer to the discussion of "Wind Cost and Performance Assumptions"
provided in the 2017 IRP,Chapter 8 (Modeling Results),page 220.
Please refer to the followingdescriptions relevant to rows 1974 to 1980 in the
SO Portfolio SENS-RPN-EEN-MM_1705241827 file in the PVRRByStation
tab:
Row Cost Catëdõiy Idéntilig Description
1974 Proposed Station Fuel Costs i WAE_WD_T cost of fuels required for operation;not applicable to wind
1975 Proposed Station VariableO&M Costs \_WAE_WD_T costs for the Wyoming production tax and wind integration cost
1976|ProposedStation Emission Costs !WAE WD_T emission costs associated with generation;not applicable to wind
1977 Proposed Station Dispatch AdderCosts I_WAE WD_T economic model drier to disincent dispatch;not used the 2017 IRP
1978 Proposed Station Fixed Costs I_WAE WD_T fixed operation and maintenance net of production tax credits
1979 Proposed Station Demand Charges I_WAE_WD_T not applicable to wind resources
1980 Proposed Station Capital Costs i WAE_WD_T capital recovery of moestments on a reaHemlized basis
(d)In cases without any Energy Gateway transmission,Wyoming wind resources
behind the TOT 4A cut-plane were limited to 300 MW.This limit was based
on a review of interconnection studies for wind projects in the interconnection
queue,which indicated that approximately 240 MW of new wind could be
interconnected.These studies indicate that once approximately 240 MW of
generation is interconnectedbehind the TOT 4A cut-plane,no further
interconnections are possible.Any additional projects would be lower in the
interconnection queue and require incremental transmission investment.For
planning purposes,the Company used 300 MW as a simplifying assumption.
This distinction is also made in the 2017 IRP.Please refer to PacifiCorp's
2017 IRP,specifically Volume I,Chapter 4 (Transmission Planning),page 62.
Please refer to Confidential Attachment IPUC 36,which reports changes in
dispatchable resource generationbehind TOT 4A from year 2020 to 2021 (the
year the WyomingProxy resource is assumed to be operational).The net
decrease of 432 gigawatt-hours (GWh)is largely a consequence of increasing
congestion behind the transmission constraint.Please refer to the confidential
work papers supporting the Direct Testimony of Company witness,Rick T.
Link,specifically the followingwork paper ,tab "PaR_StationData":
Folder:PaR Summary Reports
File:PaR Stochastic Summary PSens-RPN-EEN-MM _l705281550.xlsm
Confidential information is provided subject to the terms and conditions of the
protective agreement in this proceeding.
PAC-E-17-06 /Rocky Mountain Power
October 6,2017
IPUC 3rd Set Data Request 36
Recordholder:Randy Baker
Sponsor:Rick Link
PAC-E-17-06 /Rocky Mountain Power
October 06,2017
IPUC 3rd Set Data Request 37
IPUC Data Request 37
In reference to the new 2.6MW wind resource identified as I GO WD Tl in the
SO model summary report named SO Portfolio SENS-RPN-ËEN
MM 1705241827and identified as I_WAE_WD_T2in the PaR summary report
named PaR Stochastic Summary PSens-RPN-EEN-MM_1705281550:
(a)Please provide a description of this new wind resource includingbut not
limited to where it is located,which substation it would be connected with,the
time frame it is available for the SO model to select as a resource,and the
amount of capacity available for the SO model to select.
(b)Please explain the negative values for fixed cost in the modeling reports.
(c)Please provide details on the cost estimates found in the SO Portfolio SENS-
RPN-EEN-MM_1705241827 file in the PVRRByStation tab on lines 1222-
1229.This should include but not limited to the performance and total
resource cost attributes from the supply-side resource options,and any other
input cost assumptions used to create the values for each line item that shows
a value.
Response to IPUC Data Request 37
(a)System Optimizer model (SO model)includes up to 150 megawatts (MW)of
Goshen proxy wind as part of the supply-side resources available for selection
at various locations and times.The Goshen proxy wind identified as
I GO WD Tl is located in the Goshen node of the 2017 Integrated Resource
Plan (IRP)topology,available for selection in 2022.The Planning and Risk
(PaR)model inherits the SO portfolio,includingthe same 150 MW of Goshen
proxy wind.Substations within topology nodes are not modeled.
(b)Fixed costs for the Goshen proxy wind resource are net of the production tax
credit (PTC)benefit,resulting in a negative fixed cost.This is simply a
modeling convention as there is no separate input stream for PTCs.
(c)The generic proxy resource options available in the SO model are detailed in
the Company's 2017 IRP,specifically Chapter 6 (Resource Options),Table
6.1 (2017 Supply Side Resource Table)and Table 6.2 (Total Resource Cost
for Supply-Side Resource Options).The Company's 2017 IRP is publicly
available and can be accessed by utilizingthe followingwebsite link:
PAC-E-17-06 /Rocky Mountain Power
October 06,2017
IPUC 3rd Set Data Request 37
Please refer to the followingdescriptions relevant to rows 1222 to 1228 in the
SO Portfolio SENS-RPN-EEN-MM 1705241827 file in the PVRRB StationY
tab:
Row Cost Catád¾ry I¾ntilier Description
1222 Proposed Station Fuel Costs I_GO_WD_T1 cost of fuels required for operation;not applicableto wind
1223 ProposedStation Variable O&M Costs l_GO_WD_T1 costs for the Wyoming production ta× and wind integration cost
1224 Proposed Station Emission Costs I_GO_WD_T1 emission costs associated with generation:not applicable to wind
1225 Proposed Station Dispatch Adder Costs I_GO WD_T1 economic model drier to disincent dispatch;not used the 2017 IRP
1226 Proposed Station Fixed Costs l_GO WD_T1 fl×ed operation and maintenance net of production ta× credits
1227 Proposed Station Demand Charges I_GO WD_T1 not applicableto wind resources
1228 Proposed Station Capital Costs I_GO WD_T2 capital recovery of mvestments on a real lewitzed basis
Recordholder:Randy Baker
Sponsor:Rick Link