NDLI: Distributed finite-time information discovery-based secondary restoration for islanded microgrids

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Distributed finite-time information discovery-based secondary restoration for islanded microgrids

Content Provider	IET Digital Library
Author	Shrivastava, Sonam Subudhi, Bidyadhar
Abstract	A new finite-time secondary voltage and frequency restoration scheme for an islanded microgrid (MG) is proposed in this study. All distributed generators (DGs) do not have access to the voltage and frequency reference value which makes their control more challenging. Therefore, a finite-time Information Discovery Scheme (IDS) is incorporated into the distributed secondary control scheme. The IDS provides local estimates of the global references of voltage and frequency for DGs in finite-time, and distributed control scheme uses this information to restore the voltage and frequency of MG to their reference values while accurately sharing the active power among the DGs in finite-time. The proposed control scheme is implemented on a sparse communication network and obviates the need for a central controller thereby reducing the risk of single-point-failure. The proof for finite-time restoration and restoration time upper-bound are derived using Lyapunov theory. The effectiveness of the proposed control scheme is verified through simulation of an MG test system in MATLAB/SimPowerSystem environment for sudden load variation and time-varying communication topology. The proposed control scheme supports plug and play capability and exhibits better convergence performance and disturbance rejection than the asymptotic controller based on neighbourhood tracking error.
Starting Page	300
Ending Page	308
Page Count	9
Volume Number	3
e-ISSN	25152947
Issue Number	Issue 3, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-stg/3/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-stg.2019.0106
Journal	IET Smart Grid
Publisher	The Institution of Engineering and Technology
Publisher Date	2019-12-03
Access Restriction	Open
Rights License	Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Subject Keyword	Adaptive Control Asymptotic Controller Central Controller Closed Loop System Combinatorial Mathematics Control of Electric Power System Distributed Control Distributed Generator Distributed Power Generation Distributed Secondary Control Scheme Distribution Network Finite-time Information Discovery Scheme Finite-time Information Discovery-based Secondary Restoration Finite-time Restoration Finite-time Secondary Voltage Frequency Control Frequency Reference Value Frequency Restoration Scheme Graph Theory Islanded Microgrid Lyapunov Method Multi-agent System Multivariable Control System Power Distribution Control Power Distribution Fault Power Generation Control Restoration Time Self Adjusting Control System Stability in Control Theory Statistics Sudden Load Variation Time Varying System Time-varying Communication Topology
Content Type	Text
Resource Type	Article

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