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lecture32 - Energy production and distribution II Electric...

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ENGRI 1290 1 Energy production and distribution II Electric energy Smart grid
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ENGRI 1290 2 The electrical network Large power plants (>500 MW) Nuclear Hydro Coal Medium plants (100-500 MW) Small hydro Oil Coal Large industrial complexes Steel Refineries Chemicals Small plants (<100MW) City power plants Gas turbines Solar and wind farms Small industries Commercial Services Farms Customer networks Rural City Transport Transmission grid Distribution grid
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ENGRI 1290 3 Simplified grid structure Transmission Grid Distribution Grid
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ENGRI 1290 4 The US electrical transmission grid
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ENGRI 1290 5 Transmission grid 3 phase alternating current Step-up and step-down transformers Longest transmission lines have the highest voltages 765, 500, 345, 230 and 110 kV Average line cost Above ground 30$/m Under ground 100-150$/m Losses (3 to 6%)
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ENGRI 1290 6 Transmission costs A 300 km transmission line has a life time of 20 years.
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