sharyland utilities’ hvdc interconnection: part 1€¦ · sharyland utilities’ hvdc...
Post on 18-Aug-2018
228 Views
Preview:
TRANSCRIPT
Sharyland Utilities, L.P.
• Newest Investor Owned Utility in Texas
• A “greenfield” utility focusing on power reliability
• Our Service Territory is encompassed by the Master Planned Development of Sharyland Plantation
South Texas Location
• Located in the Cities of Mission and McAllen, TX
• Directly across the border from Reynosa, Tamaulipas, MX
• 150 miles from Financial and Industrial Center of Monterrey, Nuevo Leon, MX
The Master Plan
• South Texas Metro Area– Young Work Force– Economy
• Reynosa, Tamaulipas, MX– Large Industrial Parks– Fortune 500 Companies
• Monterrey, Nuevo Leon, MX– Industrial Center
What is an HVDC Tie?
• Power transfer between grids (states/countries)
• Provides “firewall”protection for each side
• Neglects the system characteristics to allow them to be matched. (Asynchronous Tie)
Mexico and United States Border Region CFE/ERCOT
S. Lane City
Austrop
KendallSan Marcos
Lytton
Saguin
Peters
FlewellerFPP
Flatonia
Hallettsville
So. Lane City
Columba
Edna
Carbia
Kingsville
Pleasantion
Kennedy
Skyline
HondoUvalde
Asherton
Del Reo Brackettville
Eagle Pass
Zapata
Bruni
Falfurrias
Edinburg
Stratton
DOW
T.H. WHARTONGREENSBAYOU
W.A. PARISH
SOMMERS
SAN ANTONIO
PEARSALL
SAN MIGUEL
LAREDO
FALCON DAMRaymondville
BARNEYDAVIS
LON C. HILL NUECESBAY
JOSLIN
RAYBURN
VICTORIA
COLETO
GIDEON
STP
VALASCOBlessing
Angleton
Zorn
LA PALMAJ.L. BATES
Coleto Creek
CPSLCRA
Center Point
AEP-TNC
Del Rio
Pawnee
Eagle Pass
PiedrasNegras
HERCULESPOT
LA AMISTAD
NAVA
( 2 )
N. ROSITA
RIO ESCONDIDO
CARBON II
NUEVOLAREDO
MATAMOROSRIOBRAVO
FALCON
TORREONSUR
LAMPAZOS
V. GARCIA
HUINALA
PVMONTERREY
REYNOSA
CD. VICTORIA
SALTILLO
ALTAMIRA
ESCOBEDO
PLAZA
( 2 ) ( 2 )
TEC
MONCLOVA
MONTE MORELOS
FRONTERA
AMISTAD
(2)(3)
ANDALUCIAGOMEZ
PALACIO
LERDO
PRESAFALCON
( 2 )( 2 ) ( 2 )
( 2 )
( 2 )LAUROVILLARANAHUAC
AEROPUERTO
( 2 )( 2 )
(3)
36 MWHVDC
AEP-TCC
CFE
Gulf of Mexico
CFEArea 1 Matamoros-BrownsvilleArea 2 Reynosa – McAllenArea 3 Nuevo Laredo – LaredoArea 4 Piedras Negras – Eagle PassArea 5 Presa Falcon – FalconArea 6 Ojinaga - Presidio
Area 1
Area 2Area 5
Area 3
Area 4
CAMARGOHERCULES
SANTIAGO
FCO.VILLAAVALOS
CUAUHTEMOC
CHIHUAHUA
Area 6
230 kV
138/115 kV69 kVGeneration
Substation
345/400 kV
United States
Mexico
PresidioOjinaga
AlamitoCreek
Marfa Alpine
( 2 )
PTO. ALTAMIRA
S. Lane City
Austrop
KendallSan Marcos
Lytton
Saguin
Peters
FlewellerFPP
Flatonia
Hallettsville
So. Lane City
Columba
Edna
Carbia
Kingsville
Pleasantion
Kennedy
Skyline
HondoUvalde
Asherton
Del Reo Brackettville
Eagle Pass
Zapata
Bruni
Falfurrias
Edinburg
Stratton
DOW
T.H. WHARTONGREENSBAYOU
W.A. PARISH
SOMMERS
SAN ANTONIO
PEARSALL
SAN MIGUEL
LAREDO
FALCON DAMRaymondville
BARNEYDAVIS
LON C. HILL NUECESBAY
JOSLIN
RAYBURN
VICTORIA
COLETO
GIDEON
STP
VALASCOBlessing
Angleton
Zorn
LA PALMAJ.L. BATES
Coleto Creek
CPSLCRA
Center Point
AEP-TNC
Del Rio
Pawnee
Eagle Pass
PiedrasNegras
HERCULESPOT
LA AMISTAD
NAVA
( 2 )
N. ROSITA
RIO ESCONDIDO
CARBON II
NUEVOLAREDO
MATAMOROSRIOBRAVO
FALCON
TORREONSUR
LAMPAZOS
V. GARCIA
HUINALA
PVMONTERREY
REYNOSA
CD. VICTORIA
SALTILLO
ALTAMIRA
ESCOBEDO
PLAZA
( 2 ) ( 2 )
TEC
MONCLOVA
MONTE MORELOS
FRONTERA
AMISTAD
(2)(3)
ANDALUCIAGOMEZ
PALACIO
LERDO
PRESAFALCON
( 2 )( 2 ) ( 2 )
( 2 )
( 2 )LAUROVILLARANAHUAC
AEROPUERTO
( 2 )( 2 )
(3)
36 MWHVDC
AEP-TCC
CFE
Gulf of Mexico
CFEArea 1 Matamoros-BrownsvilleArea 2 Reynosa – McAllenArea 3 Nuevo Laredo – LaredoArea 4 Piedras Negras – Eagle PassArea 5 Presa Falcon – FalconArea 6 Ojinaga - Presidio
Area 1
Area 2Area 5
Area 3
Area 4
CAMARGOHERCULES
SANTIAGO
FCO.VILLAAVALOS
CUAUHTEMOC
CHIHUAHUA
Area 6
230 kV
138/115 kV69 kVGeneration
Substation
345/400 kV230 kV
138/115 kV69 kVGeneration
Substation
230 kV
138/115 kV69 kVGeneration
Substation
345/400 kV
United States
Mexico
PresidioOjinaga
AlamitoCreek
Marfa Alpine
( 2 )
PTO. ALTAMIRA
Texas - Mexico Border Systems
Sharyland HVDC Project
• 150 MW Back-to-Back HVDC tie expandable to 300 MW
• Classic Technology• Operating at:
• 138 kV AC• +/- 21 kV DC
• In-Service October 2007
Basic Criteria
• The Interconnection must be “open-access”.– By Tariff design, the unit is open to all users.
• The technology must block disturbances from spreading into either system.– The inherent nature of DC technology acts as a firewall to
prevent disturbances from spreading system to system.• It must provide for all of its own Reactive Power
support.– Additional filter capacity (Var support) provides for rapid
injections of power from CFE into ERCOT and vice-versa during periods when peak loads or disturbances require additional support.
Basic Criteria
• It must provide for frequency regulation and maintain voltage at appropriate levels. – The control system can control or follow the frequency.
• Load pick-up and/or the ability for BlackStart in the range of 25 MW to full rated capacity was required.– Not inherent to conventional HVDC. However, BlackStart
capability was achieved with the addition of a bypass circuit.– “Make-Before-Break” capability during restoration of power
Design Issues
Load Flow and Contingency Stability Studies
– Determine power flow levels and system response in various contingency situations
• Loss of lines• Loss of generation
– Dynamic system response• Reactive support• Voltage and current disturbance
CFE-Sharyland2007Maximum Import
ERCOT System
Case 1
Variables IV
Variables V
Case 1: Three-phase-to-ground fault at Aeropuerto 400 kV on line to Villa de García. Fault clearing in 6 cycles.
Generator speed of Rio Bravo unit 3 (RIB-U3)Generator speed of Río Bravo gas turbine (RIB-TG) unit
Generator speed of Rio Bravo III units (RIBIIIG1)
Generator angle of Rio Bravo unit 3 (RIB-U3)Generator angle of Río Bravo gas turbine (RIB-TG) unit
Generator angle Rio Bravo III units (RIBIIIG1)
Design IssuesSubsynchronous Torsional Interaction - SSTI
Determine the effects of vibration due to oscillation on the turbine-generator shafts on the AC Network in the vicinity of the unit.
GeneratorIP-HPTurbineLP
Turbine
RotatingExciter
GSU
HVDCControls
Idc
ω
Ig
αVac
Vg
Design Issues
Additional Issues– Short Circuit Ratio– Determine Harmonic effects– Protection Coordination– BlackStart Sequence Coordination– Over and under voltage Coordination
Regulatory and Permitting
Presidential Permit from the United States Department of Energy• Justification of need• Environmental • Operational Requirements
Certificate of Convenience and Necessity (CCN) from the Public Utility Commission of Texas• Stakeholder discussions• Commercial Policy implications
Regulatory and Permitting
Physical Permits• US Army Corps of Engineer• International Boundary and Water Commission
• Clearance over navigable waters• Hydrology issues• Levee considerations
• Mexican Counterparts• CILA
Regulatory and Permitting
Interconnection Agreement - Sharyland Utilities and Comisión Federal de Electricidad (CFE)
System Support Agreement - Electric Reliability Council of Texas and Comisión Federal de Electricidad (CFE)
ERCOT Requirements - Protocols Revisions and changes to the Operating Guides
FERC Jurisdictional Issues - Declaratory Order
Mutual Benefits
• Enhances system reliability• Provides access to
additional generation resources
• Provides access to new wholesale markets
• Reduces environmental impact through avoidance or deferral of new generating facilities
• Reduced electric rates to consumers in both Countries.
Why a DC Tie now?
• Studies emphasize need for interconnections along the Texas and Mexican Border - specifically pointing out availability in Brownsville, Laredo and McAllen Areas.
• Infrastructure needed to support growth in the Rio Grande Valley – Joint Planning– More efficient use of existing infrastructure
• A DC Tie will remain useful even as economic conditions change. It is not a stranded investment.
top related