반도체 변압기용 모듈형 멀티레벨DC-DC 컨버터의 선택적인 전압 균형 제어
A Selective Voltage Balancing Scheme of a Modular Multilevel DC-DC Converter for Solid-State Transformers
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초록
본 논문은 반도체 변압기용 모듈형 멀티레벨 DC-DC 컨버터의 서브모듈 커패시터 전압 균형 제어 기법을 제안한다. 일반적으로 서브모듈 커패시터 전압은 개별적인 피드백 제어기에 의해 균등하게 제어할 수 있으나 모듈 개수에 따라 연산 시간이 증가한다. 본 논문에서 제안하는 전압 균형 제어 기법은 순시적으로 최대/최소 전압 값의 서브모듈만을 선택 및 제어하여연산 시간을 저감할 수 있다. 시뮬레이션을 통해 제안하는 방법의 성능 및 타당성에 대한 검증을 진행한다
Abstract
This paper proposes the selective voltage balancing scheme of a modular multilevel DC-DC converter for solid-statetransformers. In general, the sub-module capacitor voltage can be controlled uniformly by individual feedback controllers,however computation time increases according to the number of modules. The voltage balance control scheme in thispaper can reduce the computation time by selecting and controlling sub-module of maximum/minimum voltagemomentarily. The performance of the proposed selective voltage balancing scheme is verified by simulation.
참고문헌 (12)
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