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Volume 55 Issue 1
Jan.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(1): 9-17.
CHEN Minwu, TIAN Hang, SONG Yalin, CHEN Ling. Reliability Optimization of Co-phase Power Supply Device Based on Frequency Conversion Control Strategy[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 9-17. doi: 10.3969/j.issn.0258-2724.20180668
Citation: CHEN Minwu, TIAN Hang, SONG Yalin, CHEN Ling. Reliability Optimization of Co-phase Power Supply Device Based on Frequency Conversion Control Strategy[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 9-17. doi: 10.3969/j.issn.0258-2724.20180668
shu

Reliability Optimization of Co-phase Power Supply Device Based on Frequency Conversion Control Strategy

doi: 10.3969/j.issn.0258-2724.20180668
  • Received Date: 10 Aug 2018
  • Rev Recd Date: 14 Dec 2018
    • Available Online: 21 Dec 2018
  • Publish Date: 01 Feb 2020
    Abstract
  • Co-phase power supply technology can effectively deal with the obstacles in neutral-section passing and power quality common for the traction power supply system. In order to ensure the safe and reliable operation of co-phase power supply systems, the reliability optimization of the co-phase power supply device is very important due to its crucial role in the whole system. Thus, a reliability evaluation model is established in view of the special converter topology. Further, how traction load characteristics and main electrical parameters affect device reliability is analyzed. This work finds that altering switching frequency of the converter in different load sections can effectively reduce the failure rate of power components. The variable frequency control optimization model is established with the lowest failure rate of power modules. The optimal frequency conversion control strategy is obtained by the hybrid genetic algorithm-particle swarm optimization (GAPSO). Finally, an engineering prototype applied in Center-South Shanxi Railway is used for data measurement and comparative analysis, indicating that by the use of the frequency conversion control strategy, the device lifetime can be increased by 20.90%, and the growth rate of reliability can reach 54.17%. This proves that the frequency conversion control strategy can effectively improve the reliability of the co-phase power supply device.

     

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