access icon free SMES based a new PID controller for frequency stability of a real hybrid power system considering high wind power penetration

© The Institution of Engineering and Technology
Received 05/02/2018, Accepted 03/05/2018, Published 15/06/2018

This study proposes a coordination of load frequency control (LFC) and superconducting magnetic energy storage (SMES) technology (i.e. auxiliary LFC) using a new optimal PID controller-based moth swarm algorithm (MSA) in Egyptian Power System (EPS) considering high wind power penetration (HWPP) (as a future planning of the EPS). This strategy is proposed for compensating the EPS frequency deviation, preventing the conventional generators from exceeding their power ratings during load disturbances, and mitigating the power fluctuations from wind power plants. To prove the effectiveness of the proposed coordinated control strategy, the EPS considering HWPP was tested by the MATLAB/SIMULINK simulation. The convention generation system of the EPS is decomposed into three dynamics subsystems; hydro, reheat and non-reheat power plants. Moreover, the physical constraints of the governors and turbines such as generation rate constraints of power plants and speed governor dead band (i.e. backlash) are taking into consideration. The results reveal the superior robustness of the proposed coordination against all scenarios of different load profiles, and system uncertainties in the EPS considering HWPP. Moreover, the results have been confirmed by comparing it with both; the optimal LFC with/without the effect of conventional SMES, which without modifying the input control signal.

Inspec keywords: hydroelectric generators; frequency control; hybrid power systems; wind power plants; frequency stability; three-term control; superconducting magnet energy storage; optimisation; wind turbines; load regulation; hydroelectric power stations; power generation control

Other keywords: Matlab-Simulink simulation; power fluctuation mitigation; physical constraints; generation rate constraints; dynamics subsystems; load frequency control; hydropower plants; high wind power penetration; power plants; speed governor dead band; HWPP; LFC coordination; load disturbances; system uncertainties; SMES; real hybrid power system; convention generation system; nonreheat power plants; EPS frequency deviation compensation; superconducting magnetic energy storage technology; MSA; optimal PID controller-based moth swarm algorithm; reheat power plants; turbines; frequency stability; Egyptian power system; power ratings; coordinated control strategy

Subjects: Optimisation techniques; Optimisation techniques; Wind power plants; Other energy storage; Control of electric power systems; a.c. machines; Superconducting coils and magnets; Power system control; Frequency control; Hydroelectric power stations and plants

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