The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Algorithm Development for Improving Output Characteristics of Thyristor Dual Converter with AC Input Voltage Variation

교류 입력 전압 변동에 따른 사이리스터 듀얼 컨버터의 출력 특성 개선을 위한 알고리즘 개발

  • Received : 2017.07.17
  • Accepted : 2017.08.21
  • Published : 2017.09.01
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Abstract

Electric energy is consumed or regenerated according to an operation of electric rail cars in urban railway power substations. A thyristor dual converter system is used to deal with the electric energy. Since the AC input voltage of power substations is $22.9kV{\pm}10%$, the magnitude of the AC voltage fluctuates according to load conditions, so the secondary side voltage of the DDY transformer also fluctuates. In the thyristor dual converter, the response characteristics of the DC output voltage and the DC output current are changed based on an initial firing angle in the cross mode conversion between the forward mode and the reverse mode. Therefore, this paper proposes the initial firing angle tracking algorithm considering fluctuation of the AC input voltage. The effectiveness of the proposed algorithm is verified by a simulation compared with the conventional algorithm.

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References

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