이중 변환 UPS의 병렬 운전 시 외란 저감 성능 향상을 위한 정지 좌표계 상의 전향 보상 기법Feed-Forward Compensation Technique in Stationary Reference Frame for the Enhanced Disturbance Rejection Performance in Parallel Operation of Double-Conversion UPS
- Other Titles
- Feed-Forward Compensation Technique in Stationary Reference Frame for the Enhanced Disturbance Rejection Performance in Parallel Operation of Double-Conversion UPS
- Authors
- 류효준; 윤영두; 모재성; 최승철; 우태겸
- Issue Date
- Nov-2021
- Publisher
- 전력전자학회
- Keywords
- UPS(Uninterruptible Power Supply); Proportional-resonant controller; Feed-forward control; Circulating current impedance; 2-DOF(Two-Degree of Freedom) control
- Citation
- 전력전자학회 2021년도 추계학술대회 논문집, pp.1 - 3
- Indexed
- OTHER
- Journal Title
- 전력전자학회 2021년도 추계학술대회 논문집
- Start Page
- 1
- End Page
- 3
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191372
- Abstract
- Generally, a proportional-resonant controller is used to eliminate steady-state errors during the voltage–current control of a double-conversion uninterruptible power supply (UPS) in a stationary reference frame.Additionally, the feed-forward control compensating for the load current, which can be considered a disturbanceof the voltage controller, can be used to improve the disturbance rejection performance. However, during theparallel operation of UPSs, circulating current can occur between UPS modules when performing bothfeed-forward control and droop control because feed-forward control reduces the circulating current impedance.This study proposes a feed-forward compensation technique that considers the impedance of circulating current.An additional feed-forward compensation technique is developed to enhance the disturbance rejectionperformance. The validity of the proposed feed-forward compensation technique is verified by the experiment results of the parallel operation of a 500 W double-conversion UPS module.
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