goldstrike power plant presentation tuesday june 21, 2005 papers/goldstrike power plant.pdf ·...
TRANSCRIPT
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Goldstrike Power Plant PresentationJune 8, 2006
Goldstrike Power Plant PresentationGoldstrike Power Plant PresentationJune 8, 2006June 8, 2006
Western Mining Electrical Association
Western Mining Electrical Association
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Goldstrike Mines
Western 102 Power Plant
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Goldstrike Mines Aerial Photo
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Load Summary
• Roaster facility 46 MW• Mill / Autoclave 47 MW• Underground 21 MW• Water Management 13 MW• Electric Shovels 3 MW• Miscellaneous 4 MW
TOTAL 134 MW
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Utility Billing Elements
• 19 delivery points at 10 locations – aggregated• Time of Use rate structure• 15-minute Demand periods• Energy• Power Factor• Meter and facilities charges (fixed monthly fees)• Barrick negotiated “Tier 3” special rates• Beginning late 2000, introduced F&PP, CEP,
DEAA, UEC, etc. charges
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Historical Electricity Cost per MW hour
$40
$45
$50
$55
$60
$65
$70
$75
1995 1997 1999 2001 2003 2005
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Margin Pressure – Gold price
40
45
50
55
60
65
70
75
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
$ / M
WH
250
270
290
310
330
350
370
390
410
430
$ / O
Z
$/MWh $/ounce
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Margin Pressure – electricity cost
40
45
50
55
60
65
70
75
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
$ / M
WH
10
15
20
25
30
35
40
$ / O
Z
$/MWh $/ounce
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Annual Peak Demand Forecast
PROCESS PROCESS TOTALYEAR SHOVEL H²0 Underground Autoclave Roaster MISC DEM (MW)
2002 2.6 16.7 18.7 47.8 44.7 2.2 132.72003 2.6 15.0 19.6 47.7 47.7 2.2 134.72004 2.6 14.3 19.7 48.3 47.8 2.2 131.72005 2.6 13.6 19.9 48.3 47.8 2.3 134.52006 2.6 13.1 19.6 48.3 47.8 3.8 135.22007 2.6 12.6 19.1 48.3 47.8 3.8 134.22008 2.6 12.2 16.4 48.3 47.8 3.8 131.12009 2.6 11.7 14.8 44.9 47.8 3.8 125.62010 2.6 1.3 13.3 47.8 3.8 68.82011 2.6 1.3 13.3 47.8 3.8 68.82012 1.6 1.0 47.8 2.1 52.52013 1.6 1.0 47.8 2.1 52.52014 0.8 1.0 47.8 2.1 51.72015 1.0 47.8 2.1 50.92016 1.0 47.8 2.1 50.92017 1.0 47.8 2.1 50.92018 0.8 47.8 2.0 50.62019 0.8 2.0 2.8
BARRICK GOLDSTRIKE ANNUAL PEAK DEMAND (MW)
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Project Background
• Nevada law first allowed “exit” in December 2001 under AB 661.
• We needed to reverse price increases and stabilize costs. Remaining with the financially weak utility did not present a viable option.
• Barrick wanted a power plant that could provide:– Priority #1: Predictable, lower cost power– Priority #2: Timing that coincides with load profile– Priority #3: Reasonable investment return
• Options considered:– Power supply agreements (Idaho, IPP)– Purchase an existing plant– Carlin-area self-generation alternatives– Gas pipeline from Wyoming to California– Joint venture (NGC & FPL)– Joint Venture expansion of utility-owned generation– Self-generation
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Late emerging issues
• Single Largest Contingency– Defined as largest generation loss that could possibly
occur. Language interpreted as AB 661 applicant must provide spare capacity if this event transpires so that load is still served….or it goes black….
– For the recips considered, 8.25 MW vs. 40-60 with LM 6000 turbines
– 14 gensets vs. 2 combustion turbines plus 1 steam
• Water– Looking into water availability and water rights, it
became clear that it would be expensive, if available at all– Recips estimated at 200 gallons per week vs. 180 gpm for
boiler make-up water and more for evaporative cooling or intake injection
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Technology Choice Drivers
• Fuel type and source• Heat Rate
– Simple or combined cycle?
• Engine size and type (turbine vs. reciprocating)• Water requirements• Lead time
– permits, engineering, manufacturing
• Flexibility– react to market– load following
• Single Largest Contingency• Emissions
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Same technology as Barrick’s Plutonic power plant (4 x 18V34SG – 19 MW)Colorado: 20 x 18V34SG – 111 MWWestern 102: 14 x 20V34SG – 115.6 MW (8,700 BTU heat rate)
Wärtsilä – Reciprocating Engines
Wärtsilä dry cooled power plant near Denver
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Wärtsilä Nomenclature
• Wärtsilä make what are termed “medium speed engines”– Speeds range from 400 rpm to 1,000 rpm
• Typical Wärtsilä name:
Number of cylinders(6,8,9,12,16,18,20)
Number of cylinders(6,8,9,12,16,18,20)
Engine TypeSG = spark gasDF = dual fuelGD = gas dieselNothing = LFO, HFO
Engine TypeSG = spark gasDF = dual fuelGD = gas dieselNothing = LFO, HFO
Cylinder Bore(in cms.)
Cylinder Bore(in cms.)
Cylinder configuration
V or L (R)
Cylinder configuration
V or L (R)
20V34SG
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Generator Set Power Range
Unit Size MW
LIQUID FUEL 2.0-3.5 3.5-5.0 5.0-7.5 7.5-10.010.0-15.0
15.0-20.0
Wärtsilä Vasa 32 LN
Wärtsilä 32
Wärtsilä 46
GASWärtsilä 34 SG
DUAL FUELWärtsilä 32 DF
Wärtsilä 50 DF
16V46
18V46
12V32
6,9R32LN 12V32LN 16V32LN18V32LN
16V32 18V32
12V32
12V, 18V, 20V, 34SG
18V32DF12V50DF
18V50DF
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The Basics: Two Types of Gas EnginesThe Basics: Two Types of Gas Engines
• Spark Ignited (SG)– Runs on 100% natural gas, lean burn, spark ignited
• Dual Fuel (DF)– Runs on 99% natural gas + 1% pilot fuel OR 100% liquid
fuel oil
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20V34SG
• 720 RPM– Length: 42.3 ft., Width: 10.3 ft., Height 16.0 ft.,
Weight: 140 tons– Output: 8,440 kWe, Heat rate: 8,700 BTU/kWh
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Exit Process
• File notice of intent to leave; identify resources• File for transmission rights• System Impact Study
– May lead to facilities study; estimate for system upgrades
• Agreements– Transmission Service Agreement– Network Operating Agreement– Large Generator Interconnection Agreement– Interconnect Operating Agreement– Distribution Only Service
• Includes real-time metering
• Scheduling Coordinator – Gas & Electricity
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Location physical requirements
• Access to fuel source• Access to transmission lines• Access to water
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3
3
3
4
4
4
8
8
230+
230+
230+
230+
230+
345
345
345
345
345 kVproposed
Falcon-Gonder
Valmy522 MW
Tracy/Piñon Pine534 MW
ReidGardnerHarryAllen
Mohave
Davis
Clark
FortChurchill226 MW
Gonder
Falcon
CoyoteCreek Humbolt
Valley Rd
Bordertown
Mira LomaSteamboat
Bella Vista
Oxbow/Dixie Valley
Cove
Battle MtLonetree
AustinMachacek
Round Mt.
Anaconda
Millers
Tonopah
Alkali
Goldfield
Sandia
JackassFlats
Pahrump
SilverPeak
MeadHoover
Eldorad
o
Market-place
Tolson
Faulkner
Basic
ArdenDecatur
Westside
PecosNW
WW
McCulloug
h
Sunrise
300 MW
300 MW
HilltopBPA
Legend:
500 kV345 kV230 kVbelow 200kV
500 MW262 MW
Idaho Power Co.Midpoint
17 MW
17 MWControl
100 MW
120 MW
Summit440 MW
440 MW
235 MW
235 MW
PacifCorp
PG&E
LADWPAnaheimBurbankGlendalePasadenaRiverside
Tuscarora Gas CoPaiute PipelineKern River Gas Co
MAX OUT - 235MWMAX IN -440 MW
Nevada Transmission
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Western 102 Project - Location
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IPP Plant
Tracy Plant
Western 102 Plant Site
Interstate 80Reno 10 miles
Western 102 Power Plant Project
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Timeline
• Deregulation pronounced in 2001 (AB 661)– Allows large industrial users or aggregated loads > 5MW
to exit bundled service from serving utility
• AFE submitted to Board June 2004• Permits obtained by September 2004• EPC contract signed October 2004 (after 3 ½
months of negotiations)• Ground-breaking November 2004
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Western 102 Power Plant Project
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The Standard Section
70’ / 21340
20V34SG Section
Exhaust Gas Silencer
LT-/HT- WaterExpansion Vessel
+ 54’- 2” /+ 16500
SCR/OXI-CAT (optional)
Engine Generator Set
Generator Duct(optional)
Charge Air Filter
Ventilation Unit (Aux.area)Cooler Module (optional)
Auxiliary Module
Exhaust Gas Ventilation Unit
Ventilation Unit(Engine hall)
+ 17’- 8” /+ 5300
+ 29’- 7” /+ 9012
+ 35’- 11½” /+ 10960Rupture Disc
+ 23’- 9”+ 7230
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Design view from above
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Design side view – pipe module end
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Design cross-section iso
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Design cross section
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Design - pipe module end
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Design – gas train side iso
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Design – gas side view
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Construction Photos
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December 2004December 2004
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January 17, 2005
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March 16, 2005
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March 29, 2005
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April 26, 2005
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May 16, 2005
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May 16, 2005
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June 9, 2005
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First Unit Installation
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Inside Engine Hall B
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August 24, 2005
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More Project Timelines
• Schedule– October 28, 2005 – substantial completion– November 1, 2005 – ready for commercial production
• Scheduling Coordinator – RFP’s solicited with presentations by candidates in
December 2004– Selection of Avista Energy February 2005
• Signed agreement June 2005
• O & M Contractor– Began search in February / March 2005– Selection made in May 2005
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How Things Change
• BGMI effectively becomes its own utility– With electric transmission and gas pipeline capacity
• BGMI assumes control of energy costs• Must now operate a “control area” responsible for:
– Forecasting capacity and energy needs– Matching load and resources– Gas and electricity purchases
• Scheduling maintenance of major electric components (at the mine site) can offer opportunities for cost savings
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Exit from Utility’s Energy Service
• Background– Experienced rising energy cost from utility– Two year process– Exit under state legislated plan– Responsible for providing new energy resources– Pay a stipulated exit fee
• Target date – November 1, 2005
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Historical Goldstrike Electric Power Costs
Cost/MWh % Change1995 $45.841996 $47.50 4.52%1997 $46.40 -2.31%1998 $45.01 -3.01%1999 $44.87 -0.31%2000 $44.04 -1.84%2001 $59.29 34.61%2002 $66.49 12.14%2003 $67.14 0.99%2004 $68.51 2.04%2005 $72.63 5.34%
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Resources
• W102 = 115MW – Tolling 3 years• Import = 50 MW stipulated firm pro rata Midpoint
to Humboldt until load declines (then 32%)• Non-firm on this and other routes• Renewable and conservation requirement
– 6% of purchased energy, growing to 20%
• Losses – Transmission & Distribution – 3.6%
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Annual Peak Demand Forecast
PROCESS PROCESS TOTALYEAR SHOVEL H²0 Underground Autoclave Roaster MISC DEM (MW)
2002 2.6 16.7 18.7 47.8 44.7 2.2 132.72003 2.6 15.0 19.6 47.7 47.7 2.2 134.72004 2.6 14.3 19.7 48.3 47.8 2.2 131.72005 2.6 13.6 19.9 48.3 47.8 2.3 134.52006 2.6 13.1 19.6 48.3 47.8 3.8 135.22007 2.6 12.6 19.1 48.3 47.8 3.8 134.22008 2.6 12.2 16.4 48.3 47.8 3.8 131.12009 2.6 11.7 14.8 44.9 47.8 3.8 125.62010 2.6 1.3 13.3 47.8 3.8 68.82011 2.6 1.3 13.3 47.8 3.8 68.82012 1.6 1.0 47.8 2.1 52.52013 1.6 1.0 47.8 2.1 52.52014 0.8 1.0 47.8 2.1 51.72015 1.0 47.8 2.1 50.92016 1.0 47.8 2.1 50.92017 1.0 47.8 2.1 50.92018 0.8 47.8 2.0 50.62019 0.8 2.0 2.8
BARRICK GOLDSTRIKE ANNUAL PEAK DEMAND (MW)
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Western 102 Looking North
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Dove Substation and Inside Engine Hall A
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O&M
• Bid process – PIC selection• Schedule & staffing• Training & plant commissioning• Consumables – natural gas & oil
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Plant Staffing
• 1 x Barrick Employee based on site – Larry Morasse – Goldstrike Power Plant Manager
• PIC Operations & Maintenance Staffing (14 total)– PIC Manager– Operators (5)– Mechanics (6)– E & I Technicians (2)
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O&M Organization Chart
Barrick Plant ManagerBarrick Plant ManagerAdministration/FinanceFacility ManagerFacility Manager
Operations Supervisor
Operator
Operations Supervisor
Operator
Operator
Operator
Instrumentation Technician
Instrumentation Technician
Mechanical Technician
Mechanical Technician
Mechanical Technician
Mechanical Technician
Mechanical Technician
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Forecast – Natural Gas Costs
$0
$10,000,000
$20,000,000
$30,000,000
$40,000,000
$50,000,000
$60,000,000
$70,000,000
23% 30% 40% 50% 60%Time Plant Opportunistically Idled
Natural Gas Costs at $9, 7, 5/DT
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Scheduling Coordinator
• Scope of responsibilities – 24 x 7 x 365 operation at the Real-time desk
• Primary interface between BGMI and the utility– Optimize resources, buying and selling gas and
electricity
• Schedules– Annual by month, monthly by week, week ahead by
hour, day ahead by hour before 10:00 a.m.
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Forecasted Resources for Load
6/6/2006 FORECAST NAMTIE / SOURCE1 25 TOTAL
FORECASTED LOAD:6/6/2006 BARRICK POS 10 0 10
PROJECTED GENERATION:6/6/2006 WESTERN 102 NEG -5 0 -5
PROJECTED IMPORTS:6/6/2006 BARRICK M345 NEG -5 0 06/6/2006 BARRICK HILLTOP345 NEG 0 0 06/6/2006 BARRICK GON.IPP NEG 0 0 06/6/2006 BARRICK GON.PAV NEG 0 0 06/6/2006 BARRICK SPPC NEG 0 0 0
TOTAL IMPORTS: -5 0 -5
TOTAL RESOURCES (GEN & IMPORTS): -10 0 -10
NET (LOAD - RESOURCES): 0 0 0(SHOULD NET TO ZERO)
HOURLY PROFILE 01-25
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Forecast
• Major loads = Roaster, Mill / Autoclave, Underground, Water Management – each area to submit schedule to aggregator – allow for maintenance.
• Imbalance charges • Load following
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Importance of Forecasting Accuracy
• Need to plan for electric and fuel requirements• Planning maintenance outages for W102 generation• Hourly mismatch between load and resources can
cost BGMI
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Load Imbalance
• Energy Imbalance Service is provided when a difference occurs, between the scheduled and the actual delivery of energy, to a load located within a Control Area over a single hour
• Bandwidth of +/- 1.5% with a minimum of +/- 2.0 MW– Negative (energy provided to the mine by Utility)
• 100% of providers’ incremental cost– Positive (energy provided to Utility by BGMI)
• 100% of providers’ decremental cost
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Cost
• Incremental Cost– The highest hourly system incremental generation cost,
including average O&M OR
– The market proxy, California Oregon Border (COB) price plus transmission of $8.56/Mwh plus losses of 6.46%
• Decremental Cost– The highest hourly system incremental cost, excluding
average O&MOR
– The market proxy, COB minus transmission of $8.56/Mwh and minus losses of 6.46%
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Aggregated Imbalance
• The Utility accounts for all customers taking imbalance service based on an aggregate, (both positive and negative) within a 4 MW bandwidth
– Example• If Barrick is minus 2 and Other is plus 2, they will
cancel each other
• If the aggregate imbalance is greater than 4 MW, the below listed penalties or discounts on energy apply– < 5 MW 110% of incremental cost
90% of decremental cost
– > 5 MW 120% of incremental cost80% of decremental cost
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Deviations from Schedule
• During an emergency, the Utility may request an “instructed deviation”. – If Barrick complies by increasing generation or
decreasing load, then Sierra would pay 100% of decremental cost
• The Utility may call on Barrick to balance its schedule if they feel we are intentionally overproducing to force them to purchase energy. – If we fail to comply, they will not pay us anything
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Historic Imbalance Charges
Cost Pay Cost Pay Cost PayMay-04 70.2 54.2Jun-04 68.3 46.0 75.5 47.4 83.3 42.1Jul-04 71.2 55.2 83.9 51.5Aug-04 67.1 54.1 48.0 43.7Sep-04 60.2 45.4 59.5 43.4Oct-04 64.9 51.0Nov-04 75.7 58.3 93.0 52.8Dec-04 76.9 58.2 89.0 54.8Jan-05 69.7 56.2Feb-05 64.7 53.6Mar-05 75.6 60.7Apr-05 79.9 64.3
Band 1 Band 2 Band 3
Hourly Imbalance Cost/MWh
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Generation Imbalance
• Western 102 is subject to the same provisions for deviations in schedule vs. actual deliveries
• For hourly deviations where changes in load are offset by changes in generation, there are no charges
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Load Following
• Do not know the imbalance charges until the month has passed
• If we under-generate by 5 Mw (4% of average load) every hour for a peak month, the payment to the Utility could be $250,000
• If we over-generate by the same amount, the cost to Barrick may be $75k-$100k in increased cost
• Western 102 utilizes “dynamic load following”– This software controlled system uses the near real time
mine load information to change Western 102 output
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RAS & TRP
• RAS– What is it? – When does it apply?– Impact to site?
• TRP – What is it?– When does it apply?– Impact to site?
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NotificationSC Initiates Contact
Autoclave Control Room
1 2 3On-Call Autoclave Supervisor
4
Roaster Control Mill Control
5 6
Shift Supervisor
Technicians
Air Liquide
Plant Manager
Electrical Engineering
7 8
Open Pit Manager
Meikle Hoist Room
On-Call General Foreman
SuperintendentShift Supervisor
Air Products
Superintendent
Shift Supervisor
Technicians
Technicians
General or On-Call Manager
Process Manager
Water Mgmt Shift Supervisor
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Load Reduction
Tier 1 Load Reduction Load Shed (MW) CumulativeGen set - Roaster 0.80 0.80Gen set - Roaster 0.85 1.65Gen set - Autoclave 0.85 2.50Gen set - Autoclave 0.80 3.30Gen set - Mill 1.90 5.20Mill Gyro (48 hour max) 0.56 5.76Mill Jaw 0.22 5.98Roaster Gyro/MP800 (48 hours max) 1.00 6.98Water Management - A 1.60 8.58
Tier 1 Load Shed 8.58
Tier 2 Load ReductionMill 1 6.20 14.78Air Liquide ( 855 tons of GOX/day ) 2.50 17.28
Tier 2 Load Shed 8.70
Tier 3 Load ReductionAir Liquide ( 600 tons of GOX/day - notice? ) 3.00 20.28Mill 2 8.00 28.28
Tier 3 Load Shed 11.00
Tier 4 Load ReductionRoaster Mill 1 8.50 36.78
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Load Reduction Continued
Tier 5 Load Reduction Load Shed (MW) CumulativeAutoclaves, Pumphouse, Cooling Tower, Ph. IV Boiler 7.50 44.28
Tier 6 Load ReductionRemaining Mill/Autoclave Loads 5.50 49.78Meikle Mine refridgeration plant 2.80 52.58
Tier 6 Load Shed 8.30
Tier 7 Load ReductionRoaster Mill 2 8.50 61.08
Tier 8 Load ReductionRemaining Roaster Mill Loads (fans) 3.00 64.08Roasters and pumping 4.50 68.58
Tier 8 Load Shed 7.50
Tier 9 Load ReductionMeikle Mine 8.00 76.58
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Load Reduction Continued
Tier 10 Load Reduction Load Shed (MW) CumulativeWater Management - B 3.30 79.88Gen set Roaster 0.85 80.73Gen set 'Clave 0.85 81.58Gen set 'Clave 0.85 82.43Air Liquide 2.00 84.43
Tier 10 Load Shed 7.85
Tier 11 Load ReductionAir Products 12.00 96.43
Tier 12 Load ReductionAir Liquide 10.00 106.43
Tier 13 Load ReductionBalance of Wells, 602, etc. 7.40 113.83
Tier 14 Load ReductionRodeo 7.00 120.83Electric Shovels 2.50 123.33
Tier 14 Load Shed 9.50
Balance of loads - Sierra activated trip signals 12.00 135.33
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Metering
• SPPCo retrofit to real time hardware
• Data to Western 102 in near real time – Web site updated at ten minute intervals
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Practice
• Need to appoint representatives & schedule rep training with Avista site visit– This should cover process upsets, power outages,
communication channels, etc.
• Schedule– July 12, 2005
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Summary
• The Western 102 project is on schedule for completion by November 1, 2005
• The project in combination with additional purchased resources will offer BGMI better control of energy prices for the future
• PIC will provide O&M services for Western 102– Staffing is currently underway
• Avista Energy Services will provide scheduling and optimization services
• Daily load forecasting is a new responsibility for the mine and we need to appoint representatives to submit the forecast
• Imbalance charges from Sierra can be significant for mismatches between schedule and actual load
– Efforts are underway to control imbalance through dynamic load following
• The Remedial Action Scheme and Transmission Reduction Plan are important to reliable service and mine management must be prepared to respond to emergencies
• Avista and BGMI must schedule training and practice sessions beginning in July for schedule preparation and emergency response
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This Project
• Provides a physical hedge that mitigates the impact of rising fuel & energy prices– Has a stabilizing effect on energy costs
• Provides a return on investment while improving cash costs versus the price paid to the Utility
• Is reliable by virtue of 14 gensets plus 50 MW of firm import capacity
• Does not guarantee an absolute lowest cost for energy
• Does not guarantee a fixed cost for energy
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