Match the items in List - I with the items in List - II and select the correct answer using the codes given below the lists. To List I a. improve power factor b. reduce the current ripples c. increase the power flow in line d. reduce the Ferranti effect Use List II 1. shunt reactor 2. shunt capacitor 3. series capacitor 4. series reactor

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HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.