A Study on the Firing Angle at the Mode Conversion to Improve the Output Characteristics of the Double Converter for Urban Rail DC Power Supply

This paper proposes a thyrister rectification type of double converter rectification equipment to simplify trolley line equipment and return the regenerative power into AC motion without storage equipment by converting the double converter into Converter(Forward) or Inverter(Reverse) based on voltages supplied for the trolley lines using high current thyristers and keeping voltages supplied for the trolley lines constant and an optimal thyrister firing angle to improve output characteristics in mode conversion of Converter(Forward) or Inverter(Reverse) by the simulation and experiments for operation and output characteristics of the double converter rectification equipment.