hvdc 101 - energy.gov panel... · hvdc 101 high voltage dc transmission anjan bose washington state...
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HVDC 101High Voltage DC Transmission
Anjan Bose
Washington State University
Pullman, WA
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Monopole and Bipole
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HVDC Configurations
• Monopole with Earth Return
• Monopole with Metal Return
• Bipole (highest +800kV, 8000MW)
• Back to Back (B2B)
• Multi-Terminal
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Technology
• Line Commutated Converter (LCC)• Mercury Arc Rectifier - 1950s• Solid State Thyristors - 1970s
Break-even cost about 400 miles
• Voltage Sourced Converter (VSC)
IGBT (Insulated Gate Bipolar Transistor)• Two Level Converter – 2000s• Modular Multi-Level Converter (MMC) – 2010s
Break-even cost under 100 miles
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Applications
• Point to point within same grid• From generation to load center over a certain distance• Across a water body (cable)
• Point to point across separate grids• Again, generation to load center• When AC connection would affect stability
• Back to back (no transmission)• Different frequency (e.g. 50/60Hz) systems• Power transfer not large or not over long distance
• Main advantage: Power flow can be controlled
• Main disadvantage: No circuit breakers (cannot be networked)
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