IGEE402_Galiana_Final_F09

IGEE402_Galiana_Final_F09 - FINAL EXAM RSEAUX LECTRIQUES...

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FINAL EXAM RÉSEAUX ÉLECTRIQUES, POWER SYSTEMS ANALYSIS PROF. F.D. GALIANA TUESDAY, DECEMBER 8 TH , 2009 OPEN BOOK TEST; ANSWER ALL 8 QUESTIONS, EACH QUESTION BEING WORTH 15 % FOR A MAXIMUM OF 120% POINTS (FULL MARKS WILL GIVE YOU A BONUS OF 20%) (1) The voltage drop in ohms across a 300 km 3-phase transmission line referred to the local earth is given by 1 1 1 s a ss be s c V VV V - 1 1 1 r a rr r c V V = 30j 5 2 1 2 5 2 1 2 5 a b c I I I The currents in A are known to be equal to, 2 1 1000 a b c I Ia a I Where 120 o j ae . Find the sending voltages referred to the local earth if the receiving load is a grounded Y-connected load with branch impedance equal to 50 j ohms. (2) The impedance matrix of a three-phase load is given by (5+10j) 5 2 1 2 5 2 1 2 5 ohms. Find the real and reactive power consumed by the three-phase load if the zero sequence current drawn by the load is 1 A, the positive current is 2 A and the negative sequence current is zero.
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  • Winter '09
  • FRANCISCODGALIANA
  • Electric power transmission, Transmission line, Three-phase electric power, VCR, Voltage Phase angle

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IGEE402_Galiana_Final_F09 - FINAL EXAM RSEAUX LECTRIQUES...

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