Q1: a) (15 marks) Find the per phase inductance (per meter) of the 765 kV line described in the table. Note the flat horizontal spacing of 45 ft between phases. Assume that four conductors per bundle are placed at the corners of a square (with 18 in. on a side). Use the values of GMR specified in place of r'. b) (10 marks) Repeat a), neglecting the stranding and using the specified (outside) diameter of 1.424 in. as if each individual conductor were solid aluminum. What is the percent error compared with the result in a)? 45° 45' Line voltage (kV) 138 345 765 Conductors per phases (18-in. spacing) 1 2 4 Number of strands aluminum/steel 54/7 45/7 54/19 Diameter (in.) 0.977 1.165 1.424 Conductor GMR (ft) 0.0329 0.0386 0.0479 Current-carrying capacity per conductor (A) 770 1010 1250