20050404PAC response to IIPA request 42.pdf

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PACIFIC POWER UTAH POWER
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March 25 2005
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Eric L. Olsen ISB# 4811
RACINE, OLSON, NYE, BUDGE &
BAILEY, CHARTERED
O. Box 1391; 201 E. Center
Pocatello, Idaho 83204-1391
RE:ID PAC-05-
lIP A Data Requests 41-
825 E. Multnomah
Portland, Oregon 97232
[phone]
Please find enclosed PacifiCorp s Response to lIP A Data Request Number (42). Provided on the
enclosed CD is Attachment lIP A 42.
If you have any questions, please call Barry Bell at [phone].
Sincerely,
i~ (p. /1
Bob Lively, Manager
Regulation
Enclosures
cc:Katie Iverson/Monsanto
Randall C. Budge/Monsanto
James R Smith/Monsanto
James Fell/Stoel Rives
P AC-05-1/Pa~ifiCorp
March 25,2005'
lIP A Data Request 42
lIP A Data R~quest
In the Company s Net Power Cost results (Exhibit 9, Tab 5) there are listed Short
I Term Firm Sales and Purchases as well as System Balancing Sales and Purchases
for a number of "locations" such as COB, Colorado, DSW, East Main, Mid
Columbia, SP15, West Main, Wyoming, and "Emergency . Please answer the
following:
a. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1 , 2000 through the most recent data available
the actual megawatthours and dollar value of all Short-Term Firm Sales.
b. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1 , 2000 through the most recent data available,
the actual megawatthours and dollar value of all Short-Term Firm Purchases.
c. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1 , 2000 through the most recent data available
the actual megawatthours and dollar value of all Non-Firm Sales.
d. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1 , 2000 through the most recent data available
the actua~ megawatthours and dollar value of all Non-Firm Purchases.
e. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1 , 2000 through the most recent data available
the actual megawatthours and dollar value of all System Balancing Sales.f. For each of the above-mentioned locations, please supply on a total hourly
basis from 1 :00 a.m. on January 1,2000 through the most recent data available,
the actual megawatthours and dollar value of all System Balancing Purchases.
g.
Please describe how System Balancing transactions in the Net Power Cost
model are similar to as well as different from actual Non-Firm transactions.
h. Please describe how Short-Term Firm transactions in the Net Power Cost
model are similar to as well as different from actual Short-Term Firm
transacti ons.i. What is meant by "Emergency Purchases" in the Power Cost Model and
what actual purchase are simulated by these purchases? Please provide specific
examples as well as quantify the actual purchases that are simulated.
P AC-O5-1/PacifiCorp
March 25, 2005
lIP A Data Request 42
j.
What is meant by "Trapped Energy" in the Power Cost Model and what
actual sales are simulated by these sal~s? Please provide specific examples as
well as qu~ntify the actual sales that are simulated.
Response to lIP A Data Request 42 bt
Hourly information that combines all delivery points is provided as
Attachment lIP A 42 on the enclosed CD. Please note that total hourly
information for each delivery point woUld be extremely volumino~s,
estimated 13 million rows of data. Therefore, the Company has provided
hourly information that combines all delivery pbints.
Please see the Company s response to section a.
Please see the Company s response to section a.
Please see the Company s response to section a.
System Balancing Sales are included in the Company s Actual Short Term
Firm data provided in response to IIPA Request 42 a.
System Balancing Purchases are included in the Company s Actual Short
Term Film data provided in response to IIPA Request 42 b.
The GRID linear program eLP) optimization module brings each transmission
area to a zero balance by transferring energy using its transmission topology
and/or buying/selling energy at the liquid market points. For a more detailed
description, please refer to the GRID Algorithm Guide. This activity is
analogous to the Company s real time traders making firm spot transaction
just prior to the hour of delivery. The model's system balancing activity
differs from the Company s real time traders' activity in that the model most
likely has a larger imbalance to resolve and it doesn t have to deal with real
time events. See the Company s response to lIP A Request 42 h for additional
information.
The short-term firm transactions (STF) in the GRID model run are the actual
transactions that the Company made prior to the time when the net power
costs were prepared for the general rate case filing. Additional STF
transactions that are required to bring the system in balance are captured in the
system balancing LP. They differ from the actual balancing activity in two
respects. First, the model has perfect foresight. Hence, it needs only one pass
at balancing the system, whereas the traders continually rebalance the system
in response to changing conditions. Second, the model balances the system by
making single hour purchases/sales. The traders making transactions pre-day
P AC-05-1/PacifiCorp
March 25 2005.
lIP A Data Request 42
of delivery are making block transactions, e.g. a heavy load product for the
following month.
Emergency purchase means the LP does not have sufficient firm resources or
firm access to a liquid market to serve the requirements in a transmission area.
There are not analogous actual transactions labeled emergency purchase.
actual practice the real time traders will find a way to meet the requirement.
Trapped energy means the LP has a surplus in a transmission area, can not
back down generation in the area any further, and does not have sufficient
firm access to a liquid market to sell the surplus. There are no analogous
actual transactions labeled trapped energy. In actual practice, the real time
traders will find a way to market the surplus.
(Mark T. Widmer will sponsor this response at hearing.
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IDAHO
P AC-O5-
GENERAL RATE CASE
ACIFICORP
ATTACHMENT lIP A
ON THE ENCLOSED CD