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TRANSMISSION SYSTEM OVERVIEW TRANSMISSION SYSTEM OVERVIEW NETWORK OPERATING COMMITTEENETWORK OPERATING COMMITTEE
November 8, 2006November 8, 2006
New Mexico Transmission System New Mexico Transmission System OverviewOverview
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PNM Transmission System UsesPNM Transmission System Uses
Retail-PNM native load customers represent about 60% to 65% of system use
On 1/1/2007 PNM will merge TNMP’s NM facilities and customers
Wholesale-Transmission customers represent 35% to 40% of system use
Network transmission customers include:Tri State, WAPA, LAC, NEC, NTUA, City of Aztec and PNM
Point-to-point transmission customers include:EPE, TNMP, WAPA and PNMM
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A Few System Facts……A Few System Facts……
• 2006 PNM System Load 1855 MW• July 17, 2006 at 3 PM• Represents new all time peak, up 4.3% over 2005• Control Area peak load is about 2500 MW
• Line mileage (incl. jointly owned lines)• 165 miles of 500 kV (Outlet lines from Palo Verde)• 1556 miles of 345 kV• 180 miles of 230 kV• 1000 miles of 115 kV
• “Backbone” transmission lines are 150 to 200 miles in length.
• Majority of transmission lines built in late 1960s through the mid 1970s
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System Limit DeterminationsSystem Limit DeterminationsNERC/WECC Reliability Standards form the basis for system studies
AdequacySecurity
Must provide uninterrupted service even with any one facility being out of service
Transmission limits are dependent upon many factors such as voltage control devices and power factor, generation on-line,etc
Major path ratings subject to regional peer review, e.g. Path 48 in NNM and Path 47 in SNM
WECC Path Rating Catalog documents these major paths across the western grid (over 70 WECC Paths presently exist)
System limits are determined and compared to committed uses to form basis for op. procedures and capital expansion
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System CapabilitySystem Capability--Next 4 YearsNext 4 YearsFirm Annual Transmission Service ViewpointFirm Annual Transmission Service Viewpoint
2007 2008 2009 2010PNM Retail Loads 1474 1520 1562 1599
Customer Network Loads 680 683 707 713Point-to-point transmission Services 151 151 48 10Transmission Losses 91 89 86 86
Committed Uses 2396 2443 2403 2409
Path 48 Load-Side Resource (521) (604) (628) (628)
Total Path 48 Transmission Load 1875 1840 1763 1780
WECC Path 48-NNM Transmission Boundary Evaluation (North to Southeast)
Fast Ramp Capability to Offset TRM
Total NNM Transmission Capability (TTC) 1863 1912 1837 1818
(139) (59) (59) (59)
Transmission Reliability Margin (TRM) 127 131 133 133
Available Transmission Capability (ATC) 0 0 0 -36
Total Committed Use & Residual TRM 1863 1912 1837 1854
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WECC Path 48WECC Path 4820042004--06 Frequency Duration Curve06 Frequency Duration Curve
500
700
900
1100
1300
1500
1700
1900
0 1000 2000 3000 4000 5000 6000 7000 8000
NUMBER OF HOURS AT OR "ABOVE" PLOTTED MW LEVEL
Path
48
MW
Oct 2005 through September 2006
2005
2004
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Recently Completed System UpgradesRecently Completed System Upgrades
Valencia Division improvements, 10/2004Added needed capacity for growing loads
BA Station reconfiguration, 11/2004Improved reliability to “backbone” system
Project Power, June 2006Provided new transmission source for Santa Fe Area
Western NM Shunt Capacitor, 2006Provided voltage support for western 115 kV area
Upgrade of West Mesa-Algodones 115 kV line (“AL line”)Provided added thermal capacity for the AL line
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Santa Fe to Las Vegas 115kV transmission line improvement to accommodate Tri-State’s CNMIP
Cost Estimate: $2.3 million (Tri-State will cost-share)In-Service Date: Dec 2006
TNMP and Tri-State are rebuilding Alamogordo-Hollywood 115 kV line. TNMP’s portion of this rebuild consists of 14 miles between Alamogordo, NM and Tularosa, NM
TNMP’s Cost Estimate: $4.3 millionIn-Service Date: 1st quarter of 2007
Pachmann Switching Station construction to serve growing Rio Rancho area
Cost Estimate: $6.6 millionIn-Service Date: Nov 2007
Blackwater HVDC Station Life Extension, cooling and control systems
Cost Estimate: $12.5 millionIn-Service Date: 2007 and 2009
Corrales Bluffs-Southern Blvd 115 kV lineCost Estimate: $2.2 millionIn-Service Date: Dec 2007
Improve the reliability of service to loads served by Tri-State, TNMP, and EPE by operating all three lines into Alamogordo as a normally closed system
Cost Estimate: $3.2 millionIn-Service Date: 2007
Upgrade Belen-West Mesa 115 kV line Cost Estimate: $1.22 millionIn-Service Date: Dec 2007
Southern NM voltage support Cost Estimate: $1.2 millionIn-Service Date: June 2008
Rio Puerco Switching Station including 345/115 kV transformer and looping in the FW, WW and WN 345 kV lines
Cost Estimate: ~$50 millionIn-Service Date: 2009
Rio Puerco-Veranda 115 kV line Cost Estimate: $9 millionIn-Service Date: 2009
Alamogordo SVCCost Estimate: $8.6 millionIn-Service Date: 2009
PNM/TNMPPNM/TNMP--NM Planned FacilitiesNM Planned Facilities
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37 MW Biomass100 MW Wind
72 MW CC
102 MW Wind
520 MW Gas300 MW Wind200 MW Wind
(with signed LGIA)
51 MW Wind
FourCorners
San JuanShiprock
Ojo
Norton
Albuquerque Area
Network
Ambrosia
PEGSGallup
Espanola
Los Alamos
Taos
Algodones
Bluewater
Belen
Sandia
Black Water
Springer
McKinley
Springerville ~Clovis
Clapham
Bravo Dome
Las VegasSanta
Fe
WECC
SPP
345 kV Lines
115 kV Lines
Switching Stations
230 kV Lines
B-AWest Mesa
140 MW Gas (signed LGIA)
700 MWCoal
Active Interconnection RequestsActive Interconnection Requests
PNM NNM Transmission SystemPNM NNM Transmission System
85 MW Gas
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Wind Energy Potential in NMWind Energy Potential in NM
Map By created by TrueWindSolutions from MesoMap system using historical weather data
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Existing Wind Generation in New Existing Wind Generation in New MexicoMexico
Installed or under construction: 496 MW2 MW “Llano Estacado” near Clovis - Cielo Wind, hosted by Xcel Energy (1999, expanded in 2003)204MW “NMWEC” near Fort Summer – FPLE, hosted by PNM (2003)80MW “Caprock” near Tucumcari, Cielo Wind, hosted by Xcel Energy (2005)120MW ”San Juan Mesa Wind Project” near Elida, PadomaWind Power, hosted by Xcel Energy- ISD 12/31/200590 MW “Aragonne Mesa” Superior Wind, west of Santa Rosa, hosted by APS (ISD 12/2006)
Known Proposed Wind Farms753MW in PNM’s interconnection queue (incl. Aragonne)420 MW in Tri-State’s interconnection queue500 MW in El Paso Electric’s interconnection queue
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Existing New Mexico Wind Energy Center (204 MW)
Wind Interconnection Interest Primarily in Wind Interconnection Interest Primarily in Eastern NMEastern NM
Area of interest for wind generation interconnection to the PNM system
“BB” 345kV line -223-mile radial transmission facility terminated in HVDC converter station
Caliente
Artesia
Blackwater
GuadalupeB-A
Norton
Ojo
San Juan
Four Corners
Springerville
Greenlee
West Mesa
Belen
Hernandez
Taos
Sandia
Socorro
Elephant Butte
Picacho
Hollywood
Alamogordo
Holloman AFB
NewmanDiablo
Luna
Hidalgo
Dona Ana
Las Vegas
Storrie LakeBravo Dome
Springer
York Canyon
Los Alamos
Algodones Santa Fe
Blue Water
Ambrosia
Bisti
Pillar
Shiprock
Amrad
HVDC tie
HVDC tie
Moriarty
Willard
Arroyo
Deming
Phelps Dodge
McKinleyYah-tah-ey
PEGS
Central
Salopeck
Rio Grande
345 kV230 kV115 kV
Bernardo
Black Lake
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204 MW Wind (existing)
51 MW Wind(proposed)
300 MW wind(proposed)
200 MW (proposed)(signed LGIA)
BA 345kVBlackwater
345kV
To SPSTo PNM Bulk Transmission
System
Eastern interconnected system
Westerninterconnected
system
90 mi. 70 mi. 63 mi.
System ConsiderationsSystem Considerations-- Case StudyCase Study
Installed and proposed projects on the BB linePresent Use 404MW (204MW wind, 200MW power purchases)In queue as of 10/06: ~551MW (Wind) Withdrawn as of 10/06: 1200MW Line maximum capability 1000 MW
200 MWHVDC
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State and Regional Planning State and Regional Planning AdvancementsAdvancements
New Mexico IRP Rule recommended for approvalWestConnect Subregion
SWAT-AZ/NM/Southern NV, West TXCCPG-Colorado
WECC Transmission Expansion Policy Committee
Regional Congestion StudiesCoordinates the western subregions:SWAT, CCPG, CAISO, STEP, RMATS, NTAC,and latest: Northern Tier Transmission Group
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National InitiativesNational Initiatives
EPACT 2005 Brought about big changesFERC regulatory reach extended
Mandatory Reliability StandardsFERC certified NERC as the ERO 7/2006NOPR issued approving 83 of 107 standards
DOE’s National Interest Electric Transmission Corridor Identification
Congestion study issued 8/2006FERC “backstop siting” could be complex
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FERC Open Access ReformFERC Open Access Reform
FERC Order 888 “Open Access” Reform Initiative
NOPR issued 5/2006Comments and Replies filedPrimary themes include:
• Greater transparency in ATC • Open regional transmission planning• Reform energy imbalance penalties• Reform rollover rights policy• Increase customer access to information• Maintains protections for and State jurisdiction
over bundled retail loadFERC Tech Conference held 10/2006
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Questions?Questions?
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