A High Step-Up Ratio Soft-Switching DC–DC Converter for Interconnection of MVDC and HVDC Grids
2017 · IEEE Transactions on Power Electronics
저자
최성휘 (Shenghui Cui), Nils Soltau, Rik W. De Doncker
연구주제
HVDC Systems and Fault Protection · Advanced DC-DC Converters · Multilevel Inverters and Converters
NTIS 과학기술표준분류
에너지/자원만에너지·환경·원자력 확장
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AI 연구 키워드·방법
DC-DC 컨버터 직류 계통 연계 모듈형 멀티레벨 컨버터(MMC) 소프트 스위칭
키워드 (OpenAlex)
DC-DC converter soft switching high step-up ratio bidirectional converter modular multilevel converter two-level converter reactive current injection semiconductor losses
초록
DC grid technology is regarded as a promising solution for future electric networks integrating a great amount of renewable energies. It calls for high-efficiency dc–dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc transmission grids. This paper presents an isolated bidirectional soft-switching dc–dc converter combining two-level converters in parallel on the MV side and a modular multilevel converter (MMC) on the HV side. A dedicated control method of the proposed converter is presented. By the proposed method, a certain reactive current is injected into the MV side by the MMC to ensure soft-switching on the MV side. The proposed converter presents low power-semiconductor total device rating and low semiconductor losses over a wide power range at variable input and output voltages. Simulation of a 50 kV/400 …
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교수 1
연구주제 1
HVDC Systems and Fault Protection