#2.(a) What is a bipolar HVDC link? Explain in not more than 2 paragraphs using a sketch and give a couple of examples of countries where a bipolar HVDC link exists. (b) A bipolar HVDC link is rated...

#2.(a) What is a bipolar HVDC link? Explain in not more than 2 paragraphs using a sketch and give a couple of examples of countries where a bipolar HVDC link exists. (b) A bipolar HVDC link is rated at 400 kV dc, 800 MW at its rectifier converter end. The resistance of each line conductor is 30 . The converter transformers have a leakage reactance of .14 pu on their own bases. If there are 2 series connected converters per pole and the ac bus voltage at both converters (rectifier and inverter) are 240kV, compute: (i) The ratings and turns ratio, T., of the converter transformers. (11)The reactive power supplied at the rectifier and inverter converter stations. Assume operating values of a = Y, -19°