20070727Comments.pdf

SCOTT WOODBURY
DEPUTY ATTORNEY GENERAL
IDAHO PUBLIC UTILITIES COMMISSION
PO BOX 83720
BOISE, IDAHO 83720-0074
[phone]
BAR NO. 1895
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;;,;iC;SiC; ,
Street Address for Express Mail:
472 W. WASHINGTON
BOISE, IDAHO 83702-5983
Attorney for the Commission Staff
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF PACIFICORP DBA
ROCKY MOUNTAIN POWER'S PETITION TO
REVISE THE PUBLISHED AVOIDED COST
RATES TO INCLUDE MONTHLY PRICE
MUL TIPLIERS TO DIFFERENTIATE FOR
ENERGY DELIVERED DURING HEAVY LOAD )
HOURS AND LIGHT LOAD HOURS.
CASE NO. PAC-O7-
COMMENTS OF THE
COMMISSION STAFF
COMES NOW the Staff of the Idaho Public Utilities Commission, by and through its
Attorney of record, Scott Woodbury, Deputy Attorney General, and in response to the Notice of
Petition, Notice of Modified Procedure and Notice of Comment /Protest Deadline issued on June
2007 in Case No. PAC-07-, submits the following comments.
BACKGROUND
On June 18 2007, PacifiCorp dba Rocky Mountain Power (Company) filed a Petition with
the Idaho Public Utilities Commission (Commission) requesting authority to revise its published
avoided cost rates for qualifying facilities (QFs) under Sections 201 and 210 of the Public Utility
Regulatory Policies Act of 1978 (PURP A) to include monthly price multipliers to recognize the
monthly difference in value between energy delivered by QFs during heavy load hours (HLH)
and energy delivered during light load hours (LLH).
STAFF COMMENTS JULY 27, 2007
As reflected in PacifiCorp s Petition, at the present time, the Company pays the same
price to a QF that delivers energy entirely during light load hours as it pays to a QF that delivers
entirely during heavy load hours. Likewise, the Company pays the same price to a QF that
delivers entirely in a peak load month as it pays to a QF that delivers entirely in a non-peak load
month. PacifiCorp believes that the existing payment structure is inappropriate, as it does not
provide proper incentives to QFs, and is neither fair to customers nor to the QF because it could
result in either under- or over-payments for the value of the power.
The Company s proposed heavy load hour and light load hour monthly price
multipliers are reflected below.
Month Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
HLH 103%105%95%95%92%94%121%121%109%115%110%129%
LLH 94%97%80%76%63%65%92%106%99%105%96%120%
Note: These monthly price multipliers are derived from:
(1) 48 months of historical daily Dow Jones firm market data for the COB
Four Corners, Mid-Columbia and Palo Verde wholesale market hubs. The
48-months reflected in this analysis is from April 1 , 2003 through to and
including March 31 , 2007; and
(2) 48 months of system balancing data extracted from two GRID scenarios; a
Base Case and an Avoided Cost Case. The 48 months reflected in these
studies is from January 1 , 2007 through to and including December 31
2010.
These multipliers are subject to change if different 48-month periods are selected.
STAFF ANALYSIS
Since PURP A was first implemented in Idaho over 25 years ago, the Commission has
permitted Idaho Power and A vista to shape their QF purchase rates to address the difference in
energy values between the various seasons of the year. This "seasonalization" of the avoided cost
rates recognizes that energy delivered by QFs has different values based on when it is delivered.
Idaho Power s rates have three "seasons " while Avista s have two. Recently, both utilities have
sought to further refine their avoided cost rates by recognizing the difference in value on a daily
basis. This difference in value between heavy load hours and light load hours was the basis for
STAFF COMMENTS JULY 27, 2007
the daily shape adjustment that was recently approved for Avista in Commission Order No. 30111
issued in Case No. A VU-06-4. Idaho Power requests a similar daily shape adjustment in Case
No. IPC-07-04. A decision in that case is still pending.
Now, like the other two utilities, PacifiCorp is seeking to implement a series of monthly
price multipliers that will recognize seasonal differences in energy value as well as daily
differences between heavy and light load hours. The Company has never had either seasonal or
daily adjustments to its avoided cost rates before in Idaho.
PacifiCorp s proposal differs slightly from the other two utilities in two respects. First
rather than breaking the year into two or three seasons, PacifiCorp is proposing a different price
multiplier for each month. Second, rather than a fixed difference between heavy and light load
hour rates, the Company proposes monthly differences. Thus, there are two different price
multipliers for each month - one for heavy load hours and one for light load hours, or a total of 24
different price multipliers throughout the year. The price multipliers have been derived from an
analysis of historical price differences at four trading hubs where PacifiCorp frequently transacts.
As reflected in the Company s Petition, this revision would not change the computation of
avoided cost but could change the total revenues received by QFs depending on which month and
when during the day they deliver energy. For example, projects that generate more during on-
peak hours would receive greater revenue than ifno price multipliers were applied, and projects
that generate more during off-peak hours would generate less revenue. Projects with a flat
generation shape spread evenly throughout the year and the day would receive the same revenue
and be unaffected by the price multipliers. The price multipliers would, of course, only be
applied to new contracts; therefore, existing PURP A contracts would be unaffected.
The proposed price multipliers are not a precise way to adjust avoided cost rates to reflect
the value of power at the time of delivery. They simply provide approximate adjustments that
acknowledge that the value of power depends on the timing of its delivery and produce rates that
are closer to real-time rates than ifno adjustments were made. The proposed price multipliers
provide incentive for power producers to deliver power during hours and months when it is more
valuable to the Company.
The price multipliers proposed by PacifiCorp range from a low of 63 percent during light
load hours in May, to a high of 121 percent during heavy load hours in July. On average over the
course of the year, the difference in heavy and light load hour prices is $7.18. This compares
STAFF COMMENTS JULY 27, 2007
closely to Staffs proposed daily shape adjustment for Idaho Power of$7., and is not too
different from the $5 per MWh daily shape adjustment approved for Avista.
There are several possible disadvantages to the price multipliers proposed by PacifiCorp.
First, the price multipliers could introduce greater uncertainty in the monthly payments QFs
would receive because some, particularly wind generators, have no way of accurately knowing
how many kilowatt-hours their project will produce either on a monthly basis or in on-peak vs.
off-peak hours. Another disadvantage is the need for hourly metering capability at all future
projects. Finally, the adoption of a series of 24 price multipliers introduces additional complexity
into an already fairly complex system of avoided cost rates.
Despite these possible disadvantages, however, Staffis supportive of the concept of
seasonal and daily price multipliers because, although only approximate, they create rates that
more closely match avoided cost rates to the true value of power at the time of delivery.
Attachment A shows the non-Ievelized rates that would result if the Company s proposal
is approved. Attachment B shows the levelized rates for 2007-2009.
RECOMMENDATIONS
Staff recommends approval ofPacifiCorp s Petition to include monthly price multipliers
to recognize the monthly difference in value between energy delivered by QFs during heavy load
hours and energy delivered during light load hours.
Respectfully submitted this dJ')l1. day of July 2007.
Sco t oodbury
Deputy Attorney General
Technical Staff: Rick Sterling
i :umisc :comments/paceO7 .13sWlpS
STAFF COMMENTS JULY 27 , 2007
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.
CERTIFICATE OF SERVICE
I HEREBY CERTIFY THAT I HAVE THIS 27TH DAY OF JULY 2007
SERVED THE FOREGOING COMMENTS OF THE COMMISSION STAFF, IN
CASE NO. PAC-07-, BY MAILING A COpy THEREOF, POSTAGE PREPAID
TO THE FOLLOWING:
DEAN BROCKBANK
SENIOR COUNSEL
ROCKY MOUNTAIN POWER
201 S MAIN ST STE 2300
SALT LAKE CITY UT 84111
MAIL: dean.brockbank(2V,pacificoro com
BRIAN DICKMAN
MANAGER, ID REGULATORY AFFAIRS
ROCKY MOUNTAIN POWER
201 S MAIN ST STE 2300
SALT LAKE CITY UT 84111
MAIL: brian.dickman(2V,pacificoro com
DATA REQUEST RESPONSE CENTER
P ACIFICORP
825 NE MUL TNOMAH STE 2000
PORTLAND OR 97232
MAIL: datareguest(2V,pacificoro com
SECREf2~~
CERTIFICATE OF SERVICE