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UNITING THE NATION’S ELECTRIC POWER GRID. THE TRES AMIGAS SUPERSTATION . Transmission Summit West September 20, 2010. 20 th Century Electric Transmission Grid. Utility Controlled. 21 st Century Electric Transmission Grid. Customer Desires & Configurations.

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Presentation Transcript
slide3

21st Century Electric Transmission Grid

Customer Desires & Configurations

common interconnected ac system problems
Common Interconnected AC System Problems

Diminishing Returns with large interconnected AC Systems

Long Distance Transmission

  • Line losses
  • System Voltage Stability/Levels
  • Reactive Power Loading
  • Steady state
  • Transient Stability
  • Subsynchronous Oscillations
  • Latency issues (ie Spinning Reserves)
  • Inductive and Capacitive limitation factors

Interconnections

  • Uncontrolled Load flow problems and bottlenecks
    • Congestion Issues
    • Inter Area loop flow
    • Cascading Blackouts
  • Oscillation Stability
  • Frequency control
  • Voltage Stability
  • Physical interactions between power systems
common interconnected ac system problems1
Common Interconnected AC System Problems

High Cost of Interconnections

  • Reliability Costs: NERC, RC, Relaying
  • N-1 criteria often creates underutilization of transmission lines
  • Complex coordinating arrangements (RTOs, IA, JOAs, etc.)
  • Need for sophisticated and costly system impact studies
  • Participation agreement complications with multiple impacted entities
  • Regional/Subregional perturbations/phenomena difficult and costly to analyze and manage
  • Deterministic planning practices do not capture the true economic value of transmission additions/upgrades
next step the evolution to fast acting hvdc
Next Step – The Evolution to Fast Acting HVDC
  • The only way to interconnect large AC power grids with different phases is via HVDC (High Voltage Direct Current) facilities
    • AC/DC/AC Stations
    • Hybrid Transmission systems (AC/DC…DC/AC)
    • Multipoint nodes
    • Long distance DC Transmission lines
  • HVDC has the ability to control the direction and magnitude of the power flow at each node of a multipoint configuration thereby facilitating the precise needs of the interconnection points without adverse impacts to the interconnecting grid
  • HVDC has the flexibility not only to adapt to grids with different AC system real time characteristics but to also facilitate optional ancillary services to each interconnection node
slide8

From USDOE Office of Electric Delivery and Energy Reliability

“Presently, only 30% of all power generated uses power electronics somewhere between the point of generation and end use.  BY 2030, 80%of all electric power will flow through power electronics .”

Power electronics moves beyond devices that simply provide increased awareness, such as Phasor measurement systems.  These devices will respond to, interface with and control real time power flows.

benefits of power electronics
Benefits of Power electronics
  • Increased power system reliability and security
  • Increased efficiency and loading  of existing transmission and distribution infrastructure
  • Huge gains in real time power flow control
  • Improved voltage and frequency regulation
  • Improved power system transient and dynamic stability
  • More flexibility in siting transmission and generation facilities
  • The distinction between consumer devices and utility devices will largely be eliminated electrically
slide10

21st century smart grid technologies compared with those in use today.

Source: IBM Institute for Business Value

hierarchical view of the issues facing the european transmission system operators tsos
Hierarchical View of the Issues facing the European Transmission System Operators (TSOs)

Source: ENTSO-E: The pathway towards common European network operation

europe extended grid plan
Europe: Extended Grid Plan
  • From Iceland (Northwest) to Israel (Southeast)= 3,200 mi
  • Concept of grid is 25,000 miles of line

Solar Power

Wind Power

Geothermal

Hydro

Biomass

Connections already in place or planned

Vision of ABB and DLR

The new high-voltage network would range from the Sahara to the polar cap. The concept calls for main lines that are 40,000 kilometers long. And parts of it already exist.

europe extended grid plan1
Europe: Extended Grid Plan
  • From Iceland (Northwest) to Israel (Southeast)= 3,200 mi
  • Concept of grid is 25,000 miles of line

Solar Power

Wind Power

Geothermal

Hydro

Biomass

Connections already in place or planned

Vision of ABB and DLR

The new high-voltage network would range from the Sahara to the polar cap. The concept calls for main lines that are 40,000 kilometers long. And parts of it already exist.

u s national grid concept
U.S.: National Grid Concept

Concept of DOE National Renewable Energy Laboratory and American Electric Power Company

D.C and 765 KV AC lines

the location

Tres Amigas Is Ideally Situated in Eastern New Mexico Near the Borders of CO, OK and TX Serving as a Three-Way Interconnection of WECC, Eastern and ERCOT

The Location
the location regional renewable resource potential
The Location: Regional Renewable Resource Potential

Significant Regional Wind & Solar Capacity Factors in Excess of 35%

Source: NREL

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