Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 36, Issue 2, Pages 2258-2269Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.3006072
Keywords
Resistors; Harmonic analysis; DC-DC power converters; Microgrids; Capacitors; Impedance; Power harmonic filters; Control design; dc-dc power converters; decentralized control; power harmonics filters
Categories
Funding
- Canada First Excellent Research Fund-Future Energy System
- Natural Sciences Engineering Research Council of Canada
Ask authors/readers for more resources
The article proposes a virtual resistor based ripple mitigation strategy to address power quality issues caused by second-order ripples in the DC subgrid. By developing a comprehensive parameter design method and control scheme, accurate sharing and mitigation of ripple currents for adjacent BDCs is achieved, enhancing performance.
The hybrid ac-dc microgrid, consisting of ac subgrid and dc subgrid, is a promising structure to interconnect ac and dc systems to provide high quality and reliable electric energy. However, in single-phase microgrid or unbalanced three-phase microgrid, second-order ripples of the dc subgrid can lead to significant power quality issues. The ripple mitigation function can be added to existing bidirectional dc-dc converters (BDCs) or dc active power filters. Considering these ripple sources can be distributed in the dc subgrid, it is essential to develop ripple mitigation control schemes for distributed BDCs. In this article, a virtual resistor based ripple mitigation strategy is proposed. Autonomous accurate ripple current sharing can be achieved for BDCs installed closely, enabling flexible parallel of ripple mitigation converters. A comprehensive parameter design method is developed to ensure the accurate sharing for closely installed BDCs. For dc subgrid with significant line impedance, the control scheme provides the opportunity for supervisory control to further enhance ripple current sharing and mitigation performance. Both simulation and experimental results validate that the control method and the parameter design method are effective.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available