Distributed, fixed‐time, and bounded control for secondary voltage and frequency restoration in islanded microgrids. Issue 2 (1st April 2019)

• Record Type: Journal Article
• Authors: Shrivastava, Sonam; Subudhi, Bidyadhar
• Is Part Of: IET smart grid. Volume 2:Issue 2(2019)
• Page Start: 260
• Page End: 268
• Publication Date: 2019-04-01
• Subjects: Lyapunov methods -- control system synthesis -- adaptive control -- distributed power generation -- power distribution control -- power generation control -- power distribution faults -- stability -- distributed control; secondary voltage -- frequency restoration -- islanded microgrids -- microgrid technology -- promising solution -- intermittent renewable generations -- load demand -- fully distributed bounded secondary control algorithm -- flexible convergence time -- accurate active power sharing -- islanded MG -- well‐known consensus‐based -- control scheme -- fixed‐time convergence -- Lyapunov stability theory -- distributed control approach -- communication topology change -- frequent load perturbation -- bounded input controller; B0260 Optimisation techniques -- B8120J Distribution networks -- C1310 Control system analysis and synthesis methods -- C1320 Stability in control theory -- C1340B Multivariable control systems -- C1340E Self‐adjusting control systems -- 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.2018.0115
• Languages: English
• ISSNs: 2515-2947

Abstract

Abstract : Microgrid (MG) technology evolves as a promising solution to deal with the intermittent renewable generations and frequently changing load demand. This paper proposes a fully distributed and bounded secondary control algorithm with flexible convergence time for voltage and frequency restoration. It also enables accurate active power sharing for an islanded MG, compared with the well‐known consensus‐based distributed control approach. The proposed control scheme achieves accelerated fixed‐time convergence. The upper bound on the convergence is established by using the Lyapunov stability theory. The bounded, distributed control approach restores the voltage and frequency in fixed‐time while sharing the active power precisely. Further, the proposed controller is adaptive to the communication topology change and supports the plug and play feature of MG. Extensive simulations have been pursued using MATLAB/SimPowerSyetem toolbox considering frequent load perturbation and communication topology change. The obtained results are analysed to verify the performance of the proposed control algorithm. It is observed that the proposed bounded input controller converges faster than the conventional method.