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    GA based selective harmonic elimination for Five-level inverter using cascaded H-bridge modules
    (2016) Bektas, Enes; Karaca, Hulusi
    Multilevel inverters (MLI) have been commonly used in industry especially to get quality output voltage in terms of total harmonic distortion (THD). In addition, development in semiconductor technology and advanced modulation techniques make MLI implementation more attractive. Selective Harmonic Elimination (SHE) that can be applied MLI at desired switching frequency offers elimination of harmonics in the output voltage. Also, by using SHE technique with cascaded H-bridge multilevel inverters, the necessity of using filter in the output can be minimized. In this paper, SHE equations have been solved by using of Genetic Algorithm (GA) Toobox&Matlab and it has been aimed to eliminate desired harmonic orders at fundamental output voltage. Simulation results have clearly demonstrated that GA based SHE techniques can eliminate the demanded harmonic orders.
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    GA Based Selective Harmonic Elimination for Multilevel Inverter with Reduced Number of Switches
    (INT ASSOC ENGINEERS-IAENG, 2015) Karaca, Hulusi; Bektas, Enes
    Multilevel inverters have been used in the power applications to get low total harmonic distortion (THD) in medium or high voltage levels. In order to get low THD in the output voltage, several techniques have been applied to multilevel inverter. One of these techniques is Selective Harmonic Elimination (SHE) that has an extensive research area in the field of power electronics. It is also an alternative to usual PWM techniques and includes nonlinear equations of stepped voltage waveform. In this paper, multilevel inverter with reduced number of switches which enables a reduction in the system cost has been proposed, and solution of SHE equations have been optimized by Genetic Algorithm (GA). The results of simulation and analysis have apparently proved that proposed GA based SHE technique eliminates desired harmonic order.
  • Küçük Resim Yok
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    A New Bridgeless Multilevel Inverter Structure with Reduced Number of Power Switches
    (IEEE, 2017) Bektas, Enes; Bayindir, Kamil Cagatay; Karaca, Hulusi
    Multilevel inverter (MLI) has been a different alternative instead of traditional two level inverters and commonly used to obtain quality output voltage with lower Total Harmonic Distortion (THD). In addition, outstanding advantage of MLI is reduced voltage stress of the power switches. However, the structure of MLI needs excessive number of power switches especially for the higher level inverter that supplies lower THD value and lower voltage drop on the semiconductor switches. In this paper, new bridgeless multilevel inverter structure with reduced number of power switches has been proposed. Additionally, the working operations of proposed MLI have been analyzed. Harmonic Minimization Pulse Width Modulation (HMPWM) technique has been applied to proposed MLI and simulation results have been obtained by using Simulink&MATLAB. Simulation results have clearly proved that proposed new MLI's structure can be operated with resistive and inductive load and generate waveform output voltage of traditional MLI by using less number of power switches.
  • Küçük Resim Yok
    Öğe
    Selective Harmonic Elimination Using Genetic Algorithm for Multilevel Inverter with Reduced Number of Power Switches
    (NEWSWOOD LTD, 2016) Karaca, Hulusi; Bektas, Enes
    Multilevel inverters have been widely used in the power applications to get low total harmonic distortion (THD) in medium or high voltage levels. There have been several techniques that can be applied to multilevel inverter so as to get low THD in the output voltage. Selective Harmonic Elimination (SHE) technique is one of these techniques and also has an extensive field of applications in power electronics. It is also an alternative to usual PWM techniques and includes nonlinear equations of stepped voltage waveform. In addition, SHE technique offers to control effective value of output voltage. In this paper, multilevel inverter with reduced number of switches which enables a reduction in the system cost has been proposed, and solution of nonlinear SHE equations have been optimized by Genetic Algorithm (GA) software. The results of simulation and analysis have clearly demonstrated that proposed GA based SHE technique can eliminate desired harmonic order.