Cooperative Fault-Tolerant Control of Microgrids Under Switching Communication Topology

In this paper, to address the problem of multiple actuator faults in autonomous AC microgrids, a cooperative fault-tolerant control (CFTC) algorithm is designed. The proposed algorithm is responsible for the potential heterogeneous faults in units' actuators, like loss of effectiveness (LOE) an...

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Bibliographic Details
Published inIEEE transactions on smart grid Vol. 11; no. 3; pp. 1866 - 1879
Main Authors Afshari, Amir, Karrari, Mehdi, Baghaee, Hamid Reza, Gharehpetian, G. B., Karrari, Shahab
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.05.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
actuator fault
Actuators
adaptive algorithm
Algorithms
Circuit faults
Computer simulation
Cooperative control
distributed estimation
Distributed generation
Distributed secondary control
Electric potential
Energy storage
Fault tolerance
fault-tolerant control
Faults
Microgrids
State of charge
Switches
Switching
switching topology
Topology
Voltage
Voltage control
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Summary:In this paper, to address the problem of multiple actuator faults in autonomous AC microgrids, a cooperative fault-tolerant control (CFTC) algorithm is designed. The proposed algorithm is responsible for the potential heterogeneous faults in units' actuators, like loss of effectiveness (LOE) and unknown bias faults. Furthermore, the communication network is considered as a directed switching graph, which can be viewed as an unreliable network and makes the CFTC problem more challenging. Also, in addition to the distributed generation (DG) units, we consider the presence of distributed energy storage (DES) systems that operate in the islanded microgrid. In addition to the voltage and frequency regulation, it is required to balance the state of charge (SoC) of DESs to achieve accurate active power-sharing. Finally, to evaluate the performance of the proposed CFTC algorithm, simulation studies are carried out on a test microgrid system in MATLAB/Simulink environment, and the results are compared with several previously-reported methods. Simulation results and comparison with other previously-reported techniques reveal the effectiveness and accuracy of the proposed method in regulating microgrid voltage and frequency, balancing of SoC, and providing accurate proportional active power-sharing.
ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2019.2944768