Question

Assume that you are a Power System Design Engineer working for a Power Utility Company You are tasked with providing detailed engineering design and calculations for a transmission line project to deliver power to a remote mining facility. The preliminary studies have suggested that a single circuit transposed HV transmission line with the rated voltae ofrd and the length of-line 1s a feasible solution for this power transmission project. The schematic diagram of the proposed project is illustrated in Figure 1. The preliminary studies have also suggested the type of towers and conductors and the transmission line series impedance per- unit length z [Ω/km] and admittance per unit length y[S km] have been calculated accordingly The values for l-ie, 2 and y are to be obtained from the excel spreadsheet as part of your individual unique set of data Transmission Line FL Load Figure 1: Transmission line single-line diagram. real part Transmission line rated voltage Length of the transmission line (or part-1) [km] 760 304 for part-1) [kV real part imaginary part Series impedance per-unit length Shunt admittance per unit len (for part-1) for part-1 [ohm/km Skm 0.0167 0 0.306 0.0000053 a) Assuming positive sequence operation, calculate the following based on the relevant individual values (generated from the data spreadsheet) and enter the results in the answer spreadsheet i. The propagation constant gamma in units [km-] i. The characteristic impedance Zc in units [0] iii. Exact ABCD parameters of the line iv. Calculate the exact-pi equivalent circuit model parameters Z' and Y" b) Compare the Z' and Y' parameters for the exact and nominal π-equivalent models of this transmission line based on the length of the line and draw relevant graphs considering the line lengths of 200 km to 1000 km (at least 100 km intervals) Hint: vou can either calculate the parameters for nominal and exact models in 100 km intervals or use a computer code to generate the relevant graphs

Answer 1