Open AccessBackstepping fractional sliding mode voltage control of an islanded microgrid
Author(s) -
Delavari Hadi,
Naderian Sina
Publication year - 2019
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.5909
Subject(s) - backstepping , microgrid , control theory (sociology) , sliding mode control , voltage , mode (computer interface) , computer science , control (management) , engineering , physics , adaptive control , nonlinear system , electrical engineering , artificial intelligence , quantum mechanics , operating system
Distribution networks include thousands of sensors and a large number of controllable devices such as flexible loads, batteries and distributed generators with an arbitrary configuration that can be parametrically uncertain or topologically unknown. In this study, a new robust non‐linear voltage‐control strategy based on backstepping and fractional‐order (FO) sliding mode control (SMC) is presented for an islanded microgrid (MG). Then for the problem of determining the controller parameters, particle swarm optimisation algorithm is used. The primary objective in this study is to improve robust performance and disturbance rejection of the closed‐loop control system. A FO backstepping SMC is proposed in this study. The proposed controller robustly regulates the MG voltages in the presence of parametric uncertainties, unmodelled dynamics, imbalanced and non‐linear loads with harmonic. Finally, the performance of the proposed technique is investigated under disturbance in an islanded MG. An in‐depth comparative study is done to highlight the merits of the proposed controller. Simulation results revealed that the total harmonic distortion and the steady‐state error of the output voltage are successfully decreased and the dynamic performance and the capability of perturbation rejection are efficiently improved.