(Solved): (a) (i) Explain the concept of HVDC and illustrate its advantages. (8 marks) (ii) Briefly explain t ...

(a) (i) Explain the concept of HVDC and illustrate its advantages. (8 marks) (ii) Briefly explain the FACTS technology, and give an example using a circuit. (7 marks) (b) A 3-phase, \\( 275 \\mathrm{kV}, 0.8 \\mathrm{kA} \\), medium-length transmission line has the following parameters per phase: \\( R=2 \\Omega, X=33 \\Omega \\), and \\( Y=0.952 \\mathrm{mS} \\). The inductive load fed by this line at \\( 275 \\mathrm{kV} \\) has a power factor of 0.8 . Calculate the following performance metrics under rated operating conditions: (i) The sending-end voltage and transmission angle (7 marks) (ii) The efficiency of transmission. (8 marks)