The article presents torque and flux ripples minimization based on adaptive filter. The adaptive filter coefficients optimized and adapted on line by using particle swarm optimization (PSO) technique. The proposed methodology applied on closed loop speed control based on direct torque control (DTC) for surface mounted permanent magnet synchronous motor (PMSM). Fuzzy logic controller (FLC) used as speed controller while proportional-integral (PI) controller used as torque and flux controllers. Second order infinite impulse response (IIR) filter is used for ripple reduction generated due to FLC. The drive system modeled using Matlab/Simulink software in order to dynamically evaluate the performance of the proposed drive system at different operating conditions. The results provide evidence that the adaptive filter-FLC integration with optimal coefficients minimizes torque and flux ripples with reduction of total harmonic distortion generated in the three-phase currents.

In this paper, the closed loop speed controller parameters are optimized for the permanent magnet synchronous motor (PMSM) drive on the basis of the indirect field-oriented control (IFOC) technique. In this derive system under study, the speed and current controllers are implemented using the fractional order proportional, integral, and derivative (FOPID) controlling technique. FOPID is considered as efficient techniques for ripple minimization. The hybrid grey wolf optimizer (HGWO) is applied to obtain the optimal controllers in case of implementing conventional PID as well as FOPID controllers in the derive system. The optimal controller parameters tend to enhance the drive response as ripple content in speed and current, either during steady state time or transient time. The drive system is modeled and tested under various operating condition of load torque and speed. Finally, the performance for PID and FOPID are evaluated and compared within MATLAB/Simulink environment. The results attain the efficacy of the operating performance with the FOPID controller. The result shows a fast response and reduction of ripples in the torque and the current.

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Lateral intake structures suffer from sediment deposition and instability of flow path which may have a negative influence on the efficiency of power plants that use river intakes as a primary source for their cooling system. This study aims to experiment the usage of submerged vanes as a mitigation method and determine their effectiveness in decreasing sediment deposition. A numerical model was constructed using DELFT3D of a reach that is located in the Nile River including the intake structure. Several scenarios were tested to optimise several parameters such as the usage of one or two rows of vanes and the distance of the vanes from the lateral intake. The results generated from the model showed that using two rows of vanes provided a 30% reduction of erosion in front of the intake compared to the base case and a 33% reduction in the volume of sediment entering the intake. Moreover, a 36% reduction of sediment volume was observed compared to the base case when the vanes were placed at a distance that is equivalent to 0.3 the intake’s opening. The output of the model showed that it is more optimal to use two rows of submerged vanes at a distance that is equivalent to 0.3 the intake’s opening.