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논문 기본 정보

자료유형
학술저널
저자정보
Chuang Liu (Northeast Dianli University) Dawei Zhu (Northeast Dianli University) Jia Zhang (State Grid, Jilin Electric Power Training Center) Haiyang Liu (Northeast Dianli University) Guowei Cai (Northeast Dianli University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.15 No.6
발행연도
2015.11
수록면
1,609 - 1,618 (10page)

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DC microgrids are considered as prospective systems because of their easy connection of distributed energy resources (DERs) and electric vehicles (EVs), reduction of conversion loss between dc output sources and loads, lack of reactive power issues, etc. These features make them very suitable for future industrial and commercial buildings’ power systems. In addition, the bipolar-type dc system structure is more popular, because it provides two voltage levels for different power converters and loads. To keep voltage balanced in such a dc system, a bidirectional dual buck-boost voltage balancer with direct coupling is introduced based on P-cell and N-cell concepts. This results in greatly enhanced system reliability thanks to no shoot-through problems and lower switching losses with the help of power MOSFETs. In order to increase system efficiency and reliability, a novel burst-mode control strategy is proposed for the dual buck-boost voltage balancer. The basic operating principle, the current relations, and a small-signal model of the voltage balancer are analyzed under the burst-mode control scheme in detail. Finally, simulation experiments are performed and a laboratory unit with a 5kW unbalanced ability is constructed to verify the viability of the bidirectional dual buck-boost voltage balancer under the proposed burst-mode control scheme in low-voltage bipolar-type dc microgrids.

목차

Abstract
I. INTRODUCTION
II. BIDIRECTIONAL DUAL BUCK-BOOST VOLTAGE BALANCER WITH DIRECT COUPLING
III. THE NOVEL BURST-MODE CONTROL SCHEME FOR A BIDIRECTIONAL DUAL BUCK-BOOST VOLTAGE BALANCER
IV. THE AVERAGE SMALL-SIGNAL MODEL FOR THE BIDIRECTIONAL DUAL BUCK-BOOST VOLTAGE BALANCER
V. SIMULATION RESULTS FOR THE BIDIRECTIONAL DUAL BUCK-BOOST VOLTAGE BALANCER
VI. EXPERIMENTAL RESULTS
VII. CONCLUSION
REFERENCES

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