스위칭 손실을 줄이기 위한 모듈형 멀티레벨 컨버터의 제어 방법Control Method of Modular Multilevel Converter to Reduce Switching Losses
- Authors
- 박소영; 김재창; 곽상신
- Issue Date
- Dec-2017
- Publisher
- 전력전자학회
- Keywords
- MMC(Modular Multilevel Converter); Predictive control; Switching losses
- Citation
- 전력전자학회 논문지, v.22, no.6, pp 476 - 483
- Pages
- 8
- Journal Title
- 전력전자학회 논문지
- Volume
- 22
- Number
- 6
- Start Page
- 476
- End Page
- 483
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/5177
- DOI
- 10.6113/TKPE.2017.22.6.476
- ISSN
- 1229-2214
2288-6281
- Abstract
- In this paper, a voltage-based model predictive control (MPC) scheme for a modular multilevel converter is used to reduce switching loss. The proposed method calculates an offset voltage that clamps the switching operation of submodules in which the current greatly flows at every sampling period by using the reference phase voltage and the reference phase current. To use the offset voltage, the proposed method converts the current-based MPC to the voltage-based MPC. The proposed voltage-based MPC then generates a new reference pole voltage that clamps the switching of submodules by applying the calculated offset voltage to the phase voltage. Therefore, the proposed method can reduce the switching loss by stopping the switching operation of submodules in which the current greatly flows. The switching loss reduction effect of the proposed method is verified by comparing its loss data with those of the conventional MPC method.
In this paper, a voltage-based model predictive control (MPC) scheme for a modular multilevel converter is used to reduce switching loss. The proposed method calculates an offset voltage that clamps the switching operation of submodules in which the current greatly flows at every sampling period by using the reference phase voltage and the reference phase current. To use the offset voltage, the proposed method converts the current-based MPC to the voltage-based MPC. The proposed voltage-based MPC then generates a new reference pole voltage that clamps the switching of submodules by applying the calculated offset voltage to the phase voltage. Therefore, the proposed method can reduce the switching loss by stopping the switching operation of submodules in which the current greatly flows. The switching loss reduction effect of the proposed method is verified by comparing its loss data with those of the conventional MPC method.
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