Research On The Technology Of Turning AC-DC Electric Locomotive's Single Phase Auxiliary Power Into Three-phase

As the life and work environment to only single-phase AC power supply, so that those who want to three-phase power supply limited the use of electrical equipment. At present, China Electric Locomotive subsidiary of single phase transition three-phase power splitter usual, is a dedicated device for electric locomotive. Power supply, the voltage fluctuation range, three-phase voltage and current asymmetry, so that work in the three-phase auxiliary motor asymmetry, and non-rated, non-sinusoidal voltage, resulting in higher damage. For any symmetrical three-phase load, phase shift technique can be easily obtained from the single-phase AC power supply three phase AC voltage, simple structure, low cost, which will help transport and control, there is a wide range of applications. How to control the same phase-shifting circuit symmetrical three-phase output voltage for different load power, is worthy of study.Comparison of the article Le hack camera technology with the advantages and disadvantages of phase-shifting technique; that making use of Phase Shift Control technology enables Shan Xiang symmetrical three-phase Fuzai phase power to power the Yuan Li, and proves you can load for Bu Tong Lian Xu adjustable De Shuchu symmetry the feasibility of three-phase voltage. by different load power factor angle is analyzed and different single-phase transition when the three-phase circuit model. expounded thyristor controlled reactor (TCR) variable nature of the impedance control, detailed calculated parameters. in a single, three-phase converter phase-shifting elements in parallel with TCR on the ways in which the output of the circuit corresponding to different system load can be symmetrical three-phase AC output. And the technology used in AC - DC electric locomotive, the design of the optimal phase control circuit, according to load size and power factor automatic adjustment of reactive power components, to achieve three-phase output voltage is continuously adjustable. Article III for SS4-type vehicle phase load of theory analysis, for routine brake operating conditions, continuously adjustable phase shift using the technology on-board auxiliary electrical power supply options. The results show that this method is correct and feasible, for the AC - DC electric locomotive the technological transformation of three-phase power supply board for reference.Using Matlab / Simulink in the power system module structure of the simple phase shift circuit simulation. Theoretical analysis to this article the results of the simulation and design verification. Simulation results show that the proposed scheme has a good phase-shifting effect, the control system to respond quicker. Article concludes with some way to reduce the harmonic, sub-TCR method is simple and effective, the most suitable for this circuit.