IEET-2016

The Electrical Schematic Diagram of Power Part and the Methods of Forming the Inverter Output Voltage

Pustovetov, M.

Abstract.Author using computer simulation methods investigates characteristics of the device supply auxiliary circuits of dc electric locomotive in static mode. The electrical schematic diagram of power part of this device comprises a capacitive dc voltage divider, autonomous voltage source inverter, three-phase transformer with a particular connection scheme IIIy. Due to the use of construction of three-phase transformer with a single magnetic core must take into account the presence of strong electromagnetic coupling between the phases. To do this, used a mathematical model of three-phase transformer, allowing to get arbitrary schemes of winding connection, including all 12 standard phase displacement groups in a clockwise notation. The study presents results of a comparative review of the energy characteristics of the device at three methods to generate a regulated voltage at the output of the inverter. For example take into account the use of catenary voltage, efficiency, harmonic structure, the power factor. In the benefits of this study recommended control mode for transistors of the inverter.

Keywords:autonomous voltage source inverter, 3-phase transformer, mathematical model, phase displacement group, pulse-width modulation, efficiency