20170815Utah_DPU Set 2 (1-17).docx

PATRICIA E. SCHMID (#4908)
JUSTIN JETTER (#13257)
Assistant Attorney GeneralsCounsel for the DIVISION OF PUBLIC UTILITIESSEAN REYES (#7969)Attorney General of Utah
160 E 300 S, 5th Floor
P.O. Box 140857
Salt Lake City, UT 84114-0857
Telephone [phone]
BEFORE THE PUBLIC SERVICE COMMISSION OF UTAH
In the Matter of Rocky Mountain Power’s Application for Approval of Resource Decision to Repower Wind Facilities
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DOCKET NO. 17-035-39
Division of Public Utilities
2ndSet of Data Requests to
ROCKY MOUNTAIN POWER
August 1, 2017
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Please send an electronic copy and a paper copy of your Data Response to:
Erika Tedder – Paralegal
Division of Public Utilities
160 E 300 S, 4th Floor
Salt Lake City, UT 84114
PLEASE E-MAIL YOUR DATA
RESPONSE TO ERIKA TEDDER
[e-mail]
[e-mail]
[e-mail]
Response should include where applicable native WORD and EXCEL documents with intact formulae.
Your Data Response is not consideredreceived until an electronic copy is furnished and received.
In reference to Mr. Hemstreet’s testimony, lines 318-325, how many turbines does the Company expect will experience component failures that render them unable to provide service before they can be repowered? Please provide this information by wind fleet site for each of the following wind farms:
Glenrock I
Glenrock II
Rolling Hills
Seven Mile I
Seven Mile II
High Plains
McFadden Ridge
Dunlap
Marengo I
Marengo II
Goodnoe Hills
Leaning Juniper
What is the estimated economic impact relating to these turbine failures as factored into the economic analysis?
In reference to Mr. Hemstreet’s testimony, lines 269-272, in consideration of the locations of the WTGs to be repowered throughout the system, what is the average available excess carrying capacity for each of the constrained transmission lines serving those areas?
In reference to Mr. Hemstreet’s testimony, lines 350-358, Mr. Hemstreet claims that the 32 turbines that won’t be repowered will need new gear boxes. What is the average cost per turbine (all in cost to replace the gear boxes)? What is the location by wind plant of each of the 32 turbines?
But for the wind repowering, would the gearboxes need to be replaced?
Please state by wind farm how many gearboxes have been replaced to date at each respective wind plant?
Please provide the costs of each of the gearbox replacements at each wind plant with supporting documentation
Please state when the Company was first made aware of the gearbox failure issues.
Please state the name of the manufacturer and model of the defective gearboxes.
Were any of the defective gearboxes under warranty or any type of service agreement? If so, how long was the warranty coverage period for?
Did the manufacturer or WTG supplier assume any cost and liability for replacements of the gear boxes?
For each of the Company’s wind plants, please provide the O&M costs by plant, including any repairs, for the past ten years. Please identify what the repair was, the cost, why it was needed, when it was done, if the repair was covered under any type of warranty or service agreement, and who was responsible for the repair costs.
With respect to Mr. Hemstreet’s testimony, lines 345-347, please identify the location of the 230 gearbox models remaining in the Company’s wind fleet that the Company anticipates will need to be replaced. Please include the wind farm, the expected date of failure, and the forecast costs to repair or replace.
In reference to Mr. Hemstreet’s testimony, lines 381-387, with the warranty and service agreements aside provided by the turbine manufacturers, has PacifiCorp completed any reliability analysis or testing of the new equipment? If so, please provide that analysis.
In reference to Mr. Hemstreet’s testimony, lines 431-435, if the WindFREE and WindINERTIA technologies don’t work, what will the related estimated expenses be if traditional technologies are used in their place?
In reference to Mr. Hemstreet’s testimony, lines 570-581, please complete the attached table (DPU Attachment 2.11), listing all permits or licensing of any type that the Company will need to obtain to complete its wind repowering project (including modifications to current permits or licenses), the status of obtaining each respective permit, and the date the permit is obtained, etc. Please provide supporting documentation for this response. Also, please update this response every two weeks with updated information as it becomes available.
In reference to Mr. Link’s testimony, lines 298-300, what is the cost to modify the LGIA limits to gain the 20.8 percent output increase capability? Please provide a breakdown of the costs by wind plant with supporting documentation.
In reference to Mr. Link’s testimony, lines 471-481, hypothetically, if the Dave Johnston plant were retired today, would the Aeolus-to-Bridger/Anticline transmission segment still be needed? Please explain and provide supporting documentation.
In reference to Mr. Link’s testimony, lines 471-481, hypothetically, if the Dave Johnston plant were retired today, would the230 kV Network Upgrades be needed? Please explain and provide supporting documentation.
After the Dave Johnston retirement, years 2028-2050 (presumed useful life of new and repowered wind generation), and in consideration of the contribution capacities of the Dave Johnston facilities versus the proposed new and repowered wind generation, is it assumed that there will be no further need to add generation resources to the transmission that serves Dave Johnston and the wind facilities to meet load expectations?
For the period up to the retirement of the Dave Johnston plant, has the Company considered other options to mitigate the transmission congestion as the new and repowered wind comes on line? If so, please provide that analysis with complete documentation.
Please provide any analysis (in Excel format with intact formulae) that has been performed, other than that already described by Mr. Link in his testimony, showing the correlation of NPC between intermittent wind resources (NPC to recover intermittency) and thermal generation.
DPU Requestor:Division(801) 530-6653
Erika Tedder - [phone]
cc:Service List