Exercise 19 A single-circuit, 50-Hz, 3-phase transmission line is 150 km long. The line is connected to supply a load of

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Exercise 19 A Single Circuit 50 Hz 3 Phase Transmission Line Is 150 Km Long The Line Is Connected To Supply A Load Of 1 (74.68 KiB) Viewed 43 times

Exercise 19 A single-circuit, 50-Hz, 3-phase transmission line is 150 km long. The line is connected to supply a load of 30 MVA at 0.85 pf lag and 138 kV. The line constants are : R = 0.186 2/km, L = 2.60 mH/km, and C = 0.012 uF/km. Using nominal it representation calculate : (a) the ABCD constants of the line. (b) the sending end voltage when supplying (i) no load, and (ii) the above load at the receiving end at the rated voltage of 138 KV. (C) If the sending end voltage is fixed at 138 kV, calculate the load bus voltage at (i) no load and (ii) the above load of 30 MVA at 0.85 pf lag. (a) A=D=0.965 Z0.47°, B = 125.66277.17° 2. CA0.556 10 Z90.23° S (b) 133.2 kV, 153.98 142.95 kV; 117.5 kV