a) Discuss when it is more economical to use HVDC (High Voltage Direct Current) transmission, and why. Provide a distance / cost diagram, as part of your discussion. Form the

admittance matrix (YBUS) for a three-bus system, with the following reactances (X) between buses: Bus (1) to bus (2): X12 = j0.04 p.u. Bus (1) to bus (3): X13 = j0.33 p.u. Bus (2) to bus (3): X23 = j0.98 p.u. Neglect line capacitance. ) A balanced three-phase system has a fundamental current magnitude Ip = 11 A, a third harmonic of magnitude I3 = 1.14 A,and a sixth harmonic of magnitude I6 = 0.324 A. From this information, calculate: The Total Harmonic Distortion (THD) of the system. The current through the neutral.