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Unformatted text preview: A three-phase transformer rated 150 MVA, 345 kV/20.5 kV and 10% short circuit reactance is supplying to a balanced three-phase load rated 80 MVA, 22.5 kV with p.f.= 0.9 (lagging). a) Draw per-unit equivalent circuit of the system. Select 100 MVA, 22.5 kV as the base at the load. (3 points) b) With the voltage at the primary side of the transformer is kept constant at 345 kV, the load is disconnected. Determine the voltage regulation at the load. (7 points) 2...
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- Fall '07