Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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High Efficiency Strategy of High Input Voltage SMPS

고전압 입력용 SMPS의 고효율 전략

  • 우동영 (전남대학교 전기공학과) ;
  • 박성미 (한국승강기대학교 승강기공학부) ;
  • 박성준 (전남대학교 전기공학과)
  • Received : 2019.04.06
  • Accepted : 2019.06.03
  • Published : 2019.06.30
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Abstract

Recently, the demonstration and research on the power transmission using high voltage DC such as HVDC(High Voltage DC), Smart Grid, DC transmission and distribution have been actively conducted. In order to control the power converter in high-voltage DC power transmission system, SMPS(Switching Modulation Power Supply) for power converter control using high-voltage DC input is essential. However, the demand for high-pressure SMPS is still low, so the development is not enough. In the low-output SMPS using the high-voltage input, it is difficult to achieve high efficiency due to the switching transient loss especially at light load. In this paper, we propose a new switching scheme for high power SMPS control for low output power. The proposed method can provide better efficiency increase effect in the light load region compared to the existing PWM method. To verify the feasibility of the proposed method, a 40 W SMPS for HVDC MMC(Modulation Multi-level Converter) was designed and verified by simulation.

Keywords

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Fig. 1 Structure of MMC and role of SMPS

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Fig. 3 Structure of MMC and role of SMPS

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Fig. 2 High-pressure SMPS block diagram

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Fig. 4 Circuit of Pressure Reducing Converter

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Fig. 5 Simulation circuit diagram of Proposed Method

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Fig. 6 Simulation result of Proposed Method

References

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