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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Control Scheme of Hybrid Wind-Diesel System with SMES Using NSGA-II
Author(s)
Mohammed E. Lotfy1, 2, Tomonobu Senjyu2, Mohamed A. Farahat1, Amal F. Abdel-Gawad1 and Atsuhi Yona2
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DOI:10.17265/1934-8975/2017.03.009
Affiliation(s)
1. Department of Electrical Power and Machines, Zagazig University, Zagazig 44511, Egypt
2. Department of Electrical and Electronics Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
ABSTRACT
Robust control approach of hybrid
wind-diesel power system is proposed in this paper. PID
(proportional integral derivative) controller
is designed in the blade pitch system of wind turbine to improve the system dynamic
performance. Furthermore, to minimize the system oscillations, SMES (super-conducting
magnetic energy storage) with first order lead-lag controller is implemented to
supply and absorb active power quickly trying to reach power generation/demand balance
and thereby control system frequency. Minimization of frequency and wind output
power deviations are considered as two objective functions for the PID controller
of wind turbine. Also, mitigating frequency and diesel output power deviations are
presented as two objective functions of the lead-lag controller of SMES. NSGA-II (modified version of
non-dominated sorting genetic algorithm) is used to tune the controllers’ parameters to get an
optimal response. The effectiveness and robustness of the proposed control technique
are investigated under different operating conditions using Matlab environment.
The simulation results confirm the ability of the controllers to damp all frequency
and output powers fluctuations and enhance the stability and reliability of the
hybrid power system.
KEYWORDS
Wind-diesel system, isolated power system, energy storage, frequency control, blade pitch control, NSGA-II.
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