Answer Happy

Problem # 1: Consider the following transposed transmission line, the distance between any two adjacent phases is 9ft, the conductor is “Drake", the line is 150 mile long. Use the tables to find the line parameters R (at 20°C), oL, and oC where oo = 377 rad/sec. 91 9ft Problem #2: Repeat problem #1 when the conductor is the "Partridge" Problem # 3: Find the II-model (medium-line model) of problem# 1. Problem # 4: Consider the following system: L23 tul G1 G2 L25 L35 5 T3 1. Load Data for this system are: Device Parameters 40 MVA, 13.8 kV, x=0.1 pu G2 20 MVA, 12.5 kV, x = 0.1 pu Load 40 MVA, 0.85 lagging power factor TI 50 MVA, 138/13.8 kV, x = 0.1 pu T2 20 MVA, 132/13.2 kV, x=0.12 pu T3 50 MVA, 138/13.8 kV, X = 0.08 pu Pick a base value of 100 MVA, and 150 kV on the transmission line side (Ligne L23 for example). Draw the per phase equivalent circuit expressing the generators and transformers reactances in per unit. Represent the load by a power demand in per unit P+jQ. Use the model of the line obtained in Problem #3.