Power Converters occupy a special space in the power industry which are used for conversion of power from bi directional to unidirectional and vice versa. Converters are classified as six pulse, twelve pulse, twenty four pulse and so on based on number of switching devices used which require same number of gate pulses. These converters introduce harmonics into power system during the conversion process, which can be handled by filters. In the proposed work a fuzzy controlled Hybrid Active DC Filter (HADF) consisting of 80 MVAR shunt passive filters and shunt active dc power filter for six pulse High Voltage Direct Current (HVDC) converter is designed in MATLAB/Simulink environment, hybrid active dc filter mitigated the harmonic and compensated the required reactive power.

Keywords : High Voltage DC Transmission, Six Pulse Converter, Passive Filters, Shunt Active DC Power Filter, Fuzzy Logic Controller, MATLAB/Simulink.