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Research on the Technology of Turning AC-DC Electric Locomotive’s Single Phase Auxiliary Power into Three-phase

Author: ZuJian
Tutor: JinJun
School: Dalian Jiaotong University
Course: Power Electronics and Power Drives
Keywords: SS4 Electric Locomotive TCR Splitter Electric locomotive motor Harmonic
CLC: U264.56
Type: Master's thesis
Year: 2010
Downloads: 69
Quote: 0
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Abstract


Life, work environment generally only single-phase AC power, the use of electrical equipment to be three-phase power is limited. China's electric locomotive subsidiary power single phase transition three-phase conventional splitter, a dedicated device for electric locomotive. Power supply voltage fluctuation range, three-phase voltage and current asymmetry, so that the the auxiliary motor work in the three-phase asymmetric and non-rated, non-sinusoidal voltage, resulting in higher damage rate. Phase shift technique for the arbitrary symmetrical three-phase load can be easily obtained from the single-phase AC power supply symmetrical three-phase AC voltage, the structure is simple, low cost, which will help transport and control, have broad application prospects. The the output symmetrical three-phase voltage power supply for different load control in the same phase shift circuit, is worthy of further study. Comparative analysis splitter technology with phase shift technology advantages and disadvantages: proof of principle of the use of phase shift control technology can achieve single-phase power to the symmetrical three-phase load powered, and demonstrates different load continuously adjustable output symmetric the feasibility of the three-phase voltage. different power factor angle load the 0 lt; φ lt; 60, 60 lt; φ lt; 90 and φ = 60 different single-phase transition three-phase circuit model. Elaborate on the nature of the impedance controlled variable thyristor controlled reactor (TCR), the detailed calculation to obtain control parameters. Three-phase alternating current of the single three-phase conversion circuit using the method of the phase shift element in parallel TCR, so that the output of the circuit can be output corresponding to a different symmetrical load symmetrical. And technology is applied to AC - DC electric locomotive, designed to optimize the phase shift control circuit the reactive elements automatically adjust based on the size of the load and power factor, three-phase output voltage is continuously adjustable. The article is carried out for the the SS4 type of vehicle the three-phase load principle analysis to conventional brake operating conditions, continuously adjustable phase shift technology powered auxiliary motor vehicle viable options. The analysis results show that this method is correct and feasible, to provide a reference for cross - straight electric locomotive car technological transformation of the three-phase power supply. The module of the power system in Matlab / Simulink simulation circuit constructed a simple phase shift. Simulation verify the theoretical analysis and design results of this paper. The simulation results show that the proposed scheme has good phase shift effect, control system response speed faster. The article concludes with several reduce harmonic segments the TCR method is simple and effective, the most suitable for the circuit of this article.

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CLC: > Transportation > Rail transport > Locomotive works > Electric locomotive > Auxiliary motors and mechanical devices > Auxiliary power
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