PARALLEL POWER CONVERSION SYSTEM WITH OPTIMAL EFFICIENCY AND METHOD THEREOF

• Main Authors: BAE YUN HO, SHIN MUN SU, LEE EUN CHUL
• Format: Patent
• Language: English; Korean
• Published: 27.07.2023
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES

The present invention relates to a parallel power conversion system which calculates an efficiency characteristic function value for each power conversion module of a parallel power conversion unit based on the current output power of each power conversion module and repeats determination of a power command value of the power conversion module on the basis of the calculated efficiency characteristic function value for each power conversion module at regular time intervals to track an optimal efficiency operation point, such that each power conversion module can quickly operate at the optimal efficiency operation point without having to make a lot of calculations to select a combination of a plurality of power conversion modules for the power conversion system to operate at maximum efficiency, thereby being efficient. The parallel power conversion system comprises a parallel power conversion unit and a system control unit. 본 발명은 병렬전력변환시스템에 관한 것으로서, 현재 각 전력변환모듈의 출력전력에 기초하여 병렬전력변환부의 각 전력변환모듈에 대한 효율특성함수값을 산출하고, 산출된 각 전력변환모듈에 대한 효율특성함수값에 기초하여 전력변환모듈의 전력지령치를 결정하는 것을 일정 시간 간격으로 반복하며 최적효율동작점을 추종함으로써, 전력변환시스템이 최대 효율로 동작하기 위한 복수 개의 전력변환모듈의 조합을 선정하기 위한 많은 계산을 하지 않고도 빠르게 최적효율동작점에서 각 전력변환모듈이 동작할 수 있어 효율적인 병렬전력변환시스템에 관한 것이다.