Distributed Periodic Event-Triggered Algorithm for Current Sharing and Voltage Regulation in DC Microgrids

In modern control systems, most control algorithms, especially system-level ones, are implemented in discretetime (DT) with digital controllers and digital communications. In this paper, a distributed DT algorithm is developed to achieve proportional load current sharing and average bus voltage regu...

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Bibliographic Details
Published in:IEEE transactions on smart grid Vol. 11; no. 1; pp. 577 - 589
Main Authors: Fan, Bo, Peng, Jiangkai, Yang, Qinmin, Liu, Wenxin
Format: Journal Article
Language:English
Published: Piscataway IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Communication networks
Control
Control algorithms
Control systems
Controllers
Current sharing
DC microgrid
discrete-time (DT) control
Distributed generation
Electric potential
Electric power grids
event-triggered algorithm
Germanium
Load modeling
Microgrids
Positron emission
Stability analysis
Tomography
Voltage
Voltage control
voltage regulation
ISSN:1949-3053, 1949-3061
Online Access:Get full text
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Summary:In modern control systems, most control algorithms, especially system-level ones, are implemented in discretetime (DT) with digital controllers and digital communications. In this paper, a distributed DT algorithm is developed to achieve proportional load current sharing and average bus voltage regulation in DC microgrids. In order to reduce the communication requirement among the controllers, a periodic event-triggered (PET) DT algorithm is proposed by introducing a novel PET condition. Since the PET condition is detected periodically, the Zeno phenomenon existing in continuous-time (CT) event-triggered algorithms can be avoided. The communication burden for detecting the PET condition is also relieved since only the local and neighbors' triggered information is required. Through the Lyapunov synthesis, the current sharing error is proved to converge to zero asymptotically. Finally, comparative results among different algorithms, based on a detailed switchlevel microgrid model, are given to validate the effectiveness of the proposed PET control design.
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ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2019.2926108