期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 68, 期 8, 页码 7104-7114出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.3001802
关键词
Microgrids; Static VAr compensators; Harmonic analysis; Hybrid power systems; Power harmonic filters; Impedance; Droop control; hybrid dc; dc microgrid; hybrid coupled interlinking converter; interlinking converter; power compensation
资金
- Macau Science and Technology Development Fund (FDCT, Macao) [FDCT 0026/2019/A1]
- University of Macau [MYRG2017-00038-FST, MYRG2018-00056-FST]
- State Key Laboratory of Internet of Things for Smart City
The development of hybrid ac/dc microgrids benefits from the respective advantages of ac and dc microgrids, and the proposed hybrid coupled interlinking converter improves control and compensation effectiveness. Moreover, the fast harmonic control strategy not only enhances the filtering characteristics of the SVC, but also suppresses harmonic power.
The respective advantages of ac and dc microgrids lead to the blooming development of the hybrid ac/dc microgrid, which consists of ac and dc microgrid tied by an interlinking converter. A new structure of hybrid coupled interlinking converter (HCIC), which composed of a converter in series with a static VAR compensator (SVC), is proposed for hybrid ac and low voltage dc (LVdc) microgrids. Moreover, a new droop control method is correspondingly developed for the proposed HCIC. Its fundamental active and reactive power flow in the hybrid ac/dc microgrid is controlled by P-delta and Q-P-V droop control for converter part of the HCIC, and P-Q-alpha droop control is proposed for SVC part of the HCIC. Furthermore, a fast harmonic control is given based on a decoupled control strategy to improve the filtering characteristics of SVC part of the HCIC, suppress the harmonic power, and/or inject active power. Finally, simulation and experimental results are provided to verify that the proposed HCIC for hybrid ac/LVdc microgrids has the ability of good power flow control and power quality compensation, which not only meets the power flow requirements with low rating system, but also greatly promotes the development of more robust hybrid ac/dc microgrids.
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