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Efficient utilization of the power supply in Electrical Drive Systems (EDS) is a subject of interest and vast research. Nonetheless, the design of EDS aims to be robust to rough operating conditions and provide high performance. The Externally Excited Synchronous Machine (EESM) has become a cheaper alternative solution over the permanent magnet synchronous machine especially in Hybrid and Electric...
This paper proposes a phase compensator design for the flexible rotor in the high-energy-density magnetically suspended motor (HEDMSM), whose rated rotational speed is above the first bending critical speed. The optimum phase and magnitude of the control system nearby the critical speed are analyzed. Additionally, the coil inductance of the large-power HEDMSM is always large. That will lead to large...
Doubly-fed induction generator (DFIG) tied with grid and controlled in the stator flux oriented reference frame is known to have poor damping due to the large time constant of the stator circuit. Therefore, the stator flux exhibits sustained oscillation subjected to any disturbances. In this paper, we propose a state feedback control method to actively damp the oscillation by injecting optimal amount...
This paper focuses on developing a novel algorithm which dynamically optimizes the controllers of doubly fed induction generator (DFIG) driven by a wind turbine (WT) to increase DFIG transient performance in all wind speed conditions. Particle swarm optimization (PSO) is proposed to optimize parameters of PI controllers of DFIG's rotor side/grid side converters (RSC/GSC) at different wind speeds in...
In this paper, conventional lead-lag power system stabilizer (CPSS) is designed to damp electromechanical oscillations. CPSS parameters settings are computed using linear control theory. A new technique based on particle swarm optimization PSO is proposed to optimize the parameters settings of CPSS. The problem is formulated as an optimization problem, the objective is to compute the optimal parameters...
An optimal wide area controller is designed in this paper for a 12-bus power system together with a static compensator (STATCOM). The controller provides auxiliary reference signals for the automatic voltage regulators (AVR) of the generators as well as the line voltage controller of the STATCOM in such a way that it improves the clamping of the rotor speed deviations of the synchronous machines....
With increased structural flexibilities of modern wind energy conversion systems (WECSs), torsional oscillations can be hazardous to the drive train components as well as compromise output power quality. The proposed control paradigm is based on the linear quadratic Gaussian (LQG) to damp these undesired oscillations, and utilizes only one measurable feedback signal: generator speed deviation. An...
As wind turbines continue to grow in size and flexibility and are deployed in more hostile environments, the need to develop advanced control schemes will be essential to deliver the lowest possible energy costs. A sophisticated control strategy is presented to compensate for the complicated effects of a stochastic operating environment and nonlinearities inherent in wind turbine generator (WTG) dynamics...
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