Harmonic mitigation in traction supply system by using half bridge converter

Abstract

The conventional electrified train locomotive load and large speed train load are having somewhat identical characteristics like enormous power, higher power factor, small harmonic factor and large negative sequence factor. As high unfavorable current introduced in to Supply system it have thoughtful results over the power supply system like additional losses due to motor vibration which causes increase in heat. Along with this it reduce the output of transformer and maloperation of relay system. Thus there might be vulnerability about the large accelerated train supply system and its power supply system also. In order to avoid all above consequences it will be significant to minimize negative sequence current and harmonic current. In this Paper we present the method for Power Conditioning of Traction system by using half bridge converter along with its result of reduced Harmonics using with compensation circuit. For maintaining the DC-link voltage absolute and complete with dynamic tracking of the referred current signals a double loop control planned for half bridge converter constant railway power conditioning. To get regular operation of HBRPC and to reduce the errors of capacitors voltages the balanced control method is used.