期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 12, 页码 13045-13055出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3134057
关键词
Adaptive virtual resistance; dynamic event-triggered control (ETC); power sharing; uninterruptible power supply (UPS) system
资金
- Shenzhen Overseas High Level Talent Project (Peacock Plan)
- Shenzhen Stable Support Project [GXWD20201230155427003-2020082319352001]
- VILLUM FONDEN [25920]
- Center for Research on Microgrids
This article proposes a distributed dynamic event-triggered control method to address the issue of mismatched line resistance in modular online uninterruptible power supply systems and achieve accurate active power and harmonic power sharing. The method adaptsively regulates virtual resistance, reduces communication among neighboring units, and ensures system stability.
Due to the mismatched line resistance in the modular online uninterruptible power supply (UPS) systems, accurate active power and harmonic power sharing is an arduous work. To tackle this issue, this article proposes a distributed dynamic event-triggered control for the power sharing to accurately compensate the effect of mismatch among the line resistances. Benefiting from the proposed control strategy, the UPS modules adaptively regulate the virtual resistance at the fundamental and harmonic frequencies, and hence, the accurate active power and harmonic power sharing are achieved. In addition, the suggested technique allows the UPS modules to exchange information at only the event-triggered times, which greatly reduces the number of communication among the neighboring units. Furthermore, the system's stability is analyzed using a Lyapunov function. Finally, experimental case studies are provided to evaluate the performance of the proposed control strategy, showing its effectiveness in achieving the accurate power sharing, and plug-and-play capability.
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