Power Systems
A 100 Km long transmission line is loaded at 110 kV. If the loss of line is 5 MW and the load is 150 VA the resistance of the line is

 2.26 Ω / phase.
 6.06 Ω / phase.
  8.06 Ω / phase.
 4.65 Ω / phase.

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Power Systems
Which statement is not correct for the transmission line parameter R, L, G and C

 The line parameter R,L,G and C are uniformly distributed along the entire length of the line C.
 For each line, the conductors are characterized by σ c, μ c, εo = ε c and the homog
 At high frequencies at which most of communication system operate the internal inductance of the conductor is neglected.
 G = I/R. R is the AC resistance per unit length of conductor C.

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Power Systems
A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be

 PG1 = 100 MW and PG2 = 150 MW
 PG1 = 150 MW and PG2 = 100 MW
 PG1 = 0 MW and PG2 = 250 MW
 PG1 = 250 MW and PG2 = 0 MW

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