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The Selective Harmonic Elimination Pulse-Width Modulation (SHE-PWM) has been an inclusive research area in the field of Power Converters. This technique offers a tight control of the harmonic spectrum of a given voltage waveform generated by a power electronic converter along with a low number of switching transitions. It involves the solution of non-linear transcendental equation sets representing...
This paper proposes the application of Differential Evolution (DE) algorithm to the selective harmonics elimination pulse-width modulation (SHE-PWM) scheme. The aim is to solve for the set of transcendental equations that determine the switching angles of the SHE-PWM waveform. The objective function of DE is designed to minimize the selected harmonics to near zero. Furthermore the fundamental component...
An extended power balance measurement treating of harmonic component is proposed for FC-TCR type SVC for asymmetric loads compensation in this paper. The universal power definition based on cyc-function space is implemented. A weighted factor in control algorithm is introduced to control harmonic component after compensating in the range of fundamental compensation. This method, which considers harmonic...
In order to get an optimum power factor in the load compensation under distorted supply voltages, a new control strategy is proposed in this paper. In this strategy, the conductance factors for the compensated load are evaluated for the specified source current total harmonic distortion (THD) limit. The performance of this method along with perfect harmonic cancellation (PHC) and unity power factor...
This paper presents a new variation of selective harmonic elimination (SHE) technique for cascaded multilevel converter with variant DC voltage sources. The paper formulates the problem in a way which the levels of the DC sources are made variables within certain constraints. Therefore, the degrees of freedom for specifying the cost function are doubled when compared to existing family of techniques...
Effects of system unbalance and system harmonics on the operation of DFIG are of great concern. This is primarily due to the fact that system unbalance and harmonics can generate unwanted torque undulations that can potentially undermine the mechanical integrity of the tower and reduce the life time of the moving components that are attached to the generator shaft. The present paper focuses on development...
This paper presents a new method to optimize harmonic stepped waveform for multi-level inverters using harmony search algorithm. The method has the benefit of high rate of convergence and precision compared to other conventional optimization methods. The proposed technique can be applied to multi-level inverters with any number of levels. The goal of optimization is to eliminate some low order harmonics...
This paper proposes an optimization method for solving nonlinear equations of both selective harmonic elimination PWM and staircase fundamental switching waveforms. The proposed method finds all set of solutions irrespective of the switching angle numbers. The proposed optimization method is based on Mathematica Optimization Toolbox. The suggested method can overcome the drawbacks associated with...
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