5- Figure below shows two regions A (with the transformer station) and B that are already interconnected by a network (n

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5 Figure Below Shows Two Regions A With The Transformer Station And B That Are Already Interconnected By A Network N 1 (92.48 KiB) Viewed 41 times

5- Figure below shows two regions A (with the transformer station) and B that are already interconnected by a network (not shown). Ea = 100 kV/25°, Eb = 100 kV /10° The tie line connects the two regions has a reactance X=20 22. 2012 E T Ed autotransformer a) Calculate the power transmitted by the line and the direction of power flow, if no phase-shift transformer is employed. Show phasor diagram of the voltages. (2 pts) b) Calculate the required phase-shift of the transformer (Ed=100 kV Z ? ) so that the line will transmit 250 MW from region A to region B. Show phasor diagram of the voltages. (4 pts)