20090717Annual Review re Wind Integration.pdf

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IDAHO PUrsUç,.".,.,
UTILITIES COMMIBblUft
July 15, 200 AvU -E ~ Olt-O~
Jea Jewell, Commssion Secta
State of Idao
Idaho Public Utilities Commssion
Statehouse
Boise, ID 83720
Re: Wind Integrtion Report
Dear Ms. Jewell:
Enclosed for filig is an electronic copy of Avista's report in response to Idao Public
Utities Commssion (IPUC) Orer No. 30500, reuirng the Company to provide an
anual review on its wind integration.
If you have any questions regarg ths filing, pleae feel fr to contat Clit Kach at
509495-4532 or myself at [phone].
Sincerely,~~
Linda Gervais
Manager, Reguatory Policy
State and Federa Regulation
A vista Utilities
509-4954975
linda. gervais (g avistacorp.com
Enclosur
A vita Utities
Response to IPUC Order No. 30500
Re: Wind Integrtion
Backgrund
Ths report is in response to Idaho Public Utities Commssion (IPUC) Orer 30500 (''Odet').
Speificaly, the Order requis the Company to: 1) provide wind integrtion analysis and results
to the Commssion separate frm its biennal IR filing; 2) hold two public workshops pnor to
publishig the 200 IR; 3) provide an anual review and proposed adjustments when
warte; and 4) notify the Commssion when enough "on-line" wind is accumulate to move
to a new tier of the wind integration charge. Ths report is responsive to each of these
obligations.
Report on Prre Since Last Update (the 2007 Wind Intetion Study)
The Nortwest wind fleet contiues to expand. In 2007, the wind fleet was compnsed of
approximately 1,40 megawatt constrcte over approximately ten year, accrdng to the
Nortwest Wind Integration Action Plan published by the Nortwest Power and Conservation
CounciL. Only two year later the fleet has more than doubled, and now approaches 3,00 MW.
Most of the Nortwest resoure is located in Oregon and Washington. Idaho has a modest fleet
in companson, 150 MW.
Avista's wind fleet has not changed since its 2007 study. The Company integrates 35 MW frm
the Stateline Wind Energy Center. The fortcoming 200 IR anticipates 150 MW of new wind
generation on-lie by 2012 and a tota of 350 MW by 2022, equating to a penetrtion rate of
approximatly 15% relative to peak load in 2022.
Since the 2007 study, the Nortwest has intiate two regional effort to assist utities in
managig the vanabilty inherent with wid. The first is Ace Diversity Interchange (ADI).
A vista is looking to join the ADI effort in the near futue, but has not done so beause we alady
have an internal progr (power Generation Control, or PG) that limits the movement of our
generation unts for load fluctuations. A vista presently believes we wil obta a modest
improvement by joining the ADI effort, but that it wil not be as grat as other utilities since we
have instaed PGC. The second effort is Dynamc Schedulg (DS). Avista has ben
monitonng the DS effort, but have decided not to join yet given our very sma wind resource
base. As the amount of wind integrte into our system beomes larger we wil consider joinng
the effort.
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The Wind Integration Workshops held by Avista in 2008 and 200 identified no signficant
improvements or enhancements to the methods used for the 2007 study. Therefore, no new
modeling analyses were completed.
Public Workshops
A vista has held two public workshops on wind integrtion in which al parcipants to Case
A VU-E-07-02 were invited. The firt, on October 21, 2008, had the following agenda:
The majonty of the firt meetig agenda was intended to famliarze parcipants with the
Company's 2007 study, and obtan input and feeback on the study. The meeting was also
intended to gather thoughts from parcipants on fuer study the Company might consider.
Ultiately there were no action items from the workshop in that the "state of the ar" in wind
integration was deemed to have not moved greatly frm the 2007 study work.
A bnef second workshop was held on May 22, 200. The following agenda items were covered:
1) Intructions
2) Wind Integration and the 200 IR
3) Questions/Suggestions for Furer Work
As in the fit workshop, no "to-do" items came from ths meetig.
On-Line Wind Generation and Wind Intetion Charge Percentages
As stated ealier in ths letter, Avista's on-line wind generation has not changed since Order
30500. It remains at 35 MW. Therefore, the wind integrtion charge percentage remais at 7%.
Sumry
If the Commssion has any fuer questions or comments on ths anual report, please contact
Clit Kalch at 509.495.4532.
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