Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Single-phase Cascaded H-bridge Multilevel Active Power Filters in AC Electric Railway Systems

  • Wu, Liran (School of Electrical Engineering, Beijing Jiaotong University) ;
  • Wu, Mingli (School of Electrical Engineering, Beijing Jiaotong University)
  • Received : 2016.10.13
  • Accepted : 2017.02.13
  • Published : 2017.05.20
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Abstract

The power quality of AC electric railways has become an issue worthy of more and more concern. Many active compensators based on power converters have been proposed, but with complex transformers or coupled branches. This paper presents a single-phase cascaded H-bridge multilevel active power filter (APF), which can directly connect to the 27.5-kV power supplies to deal with power quality problems. According to field measured data, the load characteristics are analyzed, and the system configuration and control system are designed based on the load characteristic analysis. Finally, simulation and experimental results verify the effectiveness of the proposed APF system, considering some problems such as the supply voltage fluctuations and transient inrush currents in AC electric railway systems.

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References

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