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논문 기본 정보

자료유형
학술저널
저자정보
Ping Zhang (Zhejiang University) Huanyu Cai (Zhejiang University) Hengyang Zhao (Zhejiang University) Jianjiang Shi (Zhejiang University) Xiangning He (Zhejiang University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.15 No.6
발행연도
2015.11
수록면
1,628 - 1,639 (12page)

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초록· 키워드

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Line-interactive uninterruptible power supply (UPS) systems are good candidates for providing energy storage within a microgrid. In this paper, a control scheme for a line-interactive UPS system applied in a low-voltage microgrid is presented. It is based on the Q-w and P-E droop control to achieve a seamless transition between grid-connected and stand-alone operation modes. Moreover, a new model for designing the controllers is built in the dq-frame based on the instantaneous power definition. The new-built model takes into account the dynamic performance of the output impedance of the inverter in the dq-frame and can be evaluated in the time domain. Compared to the traditional model based on the instantaneous power definition, the new-built model is more accurate to describe the dynamic performance of the system. Simulation and experimental results obtained with a microgrid consisting of two 40-kW line-interactive UPS systems are given to validate the control strategy of the line-active UPS system and the accuracy of the new-built model.

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Abstract
I. INTRODUCTION
II. SYSTEM OVERVIEW AND ITS CONTROL SCHEME
III. LIMITATION OF THE TRADITIONAL MODEL TO DESIGN THE CONTROLLER
IV. PROPOSED NEW MODELING METHOD
V. EXPERIMENTAL RESULTS
VI. CONCLUSION
REFERENCES

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