The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Control of HVDC-MMC Considering the Switching Device's Current Capacity and Circulating Current under Unbalanced Voltage Conditions

불평형 전압 조건에서 스위칭 소자의 전류 용량과 순환전류를 고려한 HVDC-MMC 제어기법

  • Moon, Ji-Woo (Power Conversion & Control Research Center, Korea Electrotechnology Research institute) ;
  • Pae, Deuk-Woo (Department of Electrical Engineering, Pusan National University) ;
  • Park, Jung-Woo (Power Conversion & Control Research Center, Korea Electrotechnology Research Institute) ;
  • Kang, Dea-Wook (Power Conversion & Control Research Center, Korea Electrotechnology Research institute) ;
  • Yoo, Dong-Wook (Power Conversion & Control Research Center, Korea Electrotechnology Research Institute) ;
  • Kim, Jang-Mok (Department of Electrical Engineering, Pusan National University)
  • Received : 2013.02.25
  • Accepted : 2013.03.25
  • Published : 2013.06.20
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Abstract

This paper proposes a control method for high voltage direct current(HVDC) with modular multilevel converter (MMC) under unbalanced voltage conditions considering the submodule(SM)'s current capacity and circulating current. It is aimed to propose a control method in which the current peak value does not exceed the maximum value of HVDC-MMC by considering the current capacity of the SM under unbalance voltage conditions. And it analyzes the effect of the unbalanced voltage on circulating currents in MMC and then proposes a control method considering each component of circulating currents under unbalanced voltages. The effectiveness of the proposed controlling method is verified through simulation results using PSCAD/EMTDC.

Keywords

References

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