High-gain observer-based sensorless control of a flywheel energy storage system for integration with a grid-connected variable-speed wind generator

  • M. Mansour
  • S. Hadj Saïd
  • S. BendoukhaEmail author
  • W. Berrayana
  • M. N. Mansouri
  • M. F. Mimouni
Methodologies and Application


This paper introduces an induction machine-based flywheel energy storage system (FESS) for direct integration with a variable-speed wind generator (VSWG). The aim is to connect the FESS at the DC bus level of a permanent magnet synchronous generator-based VSWG in order to stabilize the DC bus voltage as well as the power flowing into the grid. A rotor flux-oriented control strategy is proposed for the FESS converter based on the actual speed of the flywheel rotor. Since mechanical speed sensors are prone to failure and increase the maintenance cost of the system, a sensorless technique is proposed to estimate the rotor speed through a specially synthesized high-gain observer (HGO). The proposed observer achieves accurate tracking of the flywheel speed and flux and reduces the adverse effects of variations in the rated rotor resistance. Simulation results obtained using the MATLAB-Simulink environment are presented to illustrate the theoretical synthesis and analysis of the proposed FOC and sensorless HGO control strategies.


IM FESS RFOC Sensorless control HGO 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Electrical Engineering Department, College of Engineering at YanbuTaibah UniversityYanbuSaudi Arabia
  2. 2.Research Unit of Industrial Systems Study and Renewable Energy, Electrical Engineering Department, National Engineering School of MonastirUniversity of MonastirMonastirTunisia
  3. 3.College of Computer Science and Engineering at YanbuTaibah UniversityYanbuSaudi Arabia

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