Question

450 B: pole syachromous geaerator rated ar 138 V ad 400 MTA bas a synchrouous reactance of e of the raasformer is connected to a short pu oa its owa base I is coawecred to a step-up raasformer, rated 250 MVA 130V 120 V aud 5 C impedance of Z:-2*)10 o 10 mpedance of X=0 10 per unt on its on base The high-sid resistive load of R l ar-20 ohms per pla per phase. The transnusuoo line feeds a Δ-connected purely (2 pts) Coapute the speed ia pm. of thus geaerator asmissioo live, aud the load Tbere should be three buses. You do not need to show the impedaaces (3ps) Select a system pomer base of 100 MVA Usng a 13.8 kV base for the generator section of the ps) Drow the ove-Jlive disgram for this systeam You seed to show the geperator, the transformer, the tbe system compute the per-unit values of XXineand R d ps) Dw the per-wair cizreut for this system Ideanify the circut locations comespoading to the three buses of pat (@) with labels 1, 2, aad 3 (2 pts) Compute the three-phase power consumed by the load if the geperator is operating at 1.020 e bdicae if de geserator is operating lesding, lagging or at uniy power factor po) C ps) Bared oa y to (,dicate wbether tbe geperator is supplying vars, absorbing vars, or ( ps) Based o you use to (, indicate wherher the machine is overexcited, underexcited, or i (2ps) Based op your ausver to (, indicate wbetber Ericos(6) is greater, smaller, or equal to Vi. wbere Vi i tbe geperator termuizal voltsge maguirude, E is the excitaton (iaterual) roltage aguinude, aud is the angle by which E leads V

Answer 1

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