Distributed finite‐time information discovery‐based secondary restoration for islanded microgrids. Issue 3 (26th February 2020)

• Record Type: Journal Article
• Authors: Shrivastava, Sonam; Subudhi, Bidyadhar
• Is Part Of: IET smart grid. Volume 3:Issue 3(2020)
• Page Start: 300
• Page End: 308
• Publication Date: 2020-02-26
• Subjects: power distribution faults -- graph theory -- time‐varying systems -- distributed control -- power generation control -- adaptive control -- distributed power generation -- multi‐agent systems -- frequency control -- Lyapunov methods -- power distribution control -- closed loop systems; finite‐time information discovery‐based secondary restoration -- islanded microgrid -- finite‐time secondary voltage -- frequency restoration scheme -- distributed generators -- frequency reference value -- finite‐time Information Discovery Scheme -- distributed secondary control scheme -- central controller -- finite‐time restoration -- restoration time -- sudden load variation -- time‐varying communication topology -- asymptotic controller; B0240Z Other topics in statistics -- B8120J Distribution networks -- C1160 Combinatorial mathematics -- C1320 Stability in control theory -- C1340B Multivariable control systems -- C1340E Self‐adjusting control systems -- C3110G Frequency control -- C3340H Control of electric power systems -- B8120K Distributed power generation; Smart power grids -- Periodicals; Computer science -- Periodicals; Energy industries -- Periodicals; Broadcasting -- Periodicals; 333.79110285
• DOI: 10.1049/iet-stg.2019.0106
• Languages: English
• ISSNs: 2515-2947

Abstract

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.