THD minimization for Z-source-based inverters with a novel sinusoidal PWM  switching method

Davood GHADERI

Article Details

THD minimization for Z-source-based inverters with a novel sinusoidal PWM switching method

Authors:

Davood GHADERI

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2019 Vol.27 Issue 4, pp.3098-3113

Document Type:

Article

Publication Date:

7/2019

Document Language:

English

Document ID (Org No.):

2000733897

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

This paper presents a modified sinusoidal pulse width modulation (SPWM) switching method for one-phase  and investigated two-phase impedance-source inverter structures. The proposed structure generates pulses for a quasi-  Z-source converter and this block produces a unilateral voltage sine wave in the block's output. This signal is applied  to the inverter as its input wave. For this purpose, the novel SPWM method is proposed for power switches while  being switched complementarily. Two power switches are used in the structure to generate the pure sinusoidal output  voltage and to minimize total harmonic distortion (THD), which is an essential parameter in inverter design. The results  show that the proposed method generates the pure sinusoidal voltage and current signals for resistive and inductive  loads and pure voltage and improved current waves for capacitive loads in comparison with existing techniques, since  the THD of the output voltage and current signals is strongly affected by the dynamic loads. This method leads to  final cost improvement and reduction of the size of the system with fewer number of components, which are essential  parameters for renewable energy resource applications. A mathematical model is validated with the 2017a version of  MATLAB/Simulink and 1.51% and 1.33% THD values are reported for low and high power loads, respectively, in the  one-phase structure and 0.95% and 0.87% in the two-phase system. Finally, a 120 W prototype has been implemented  and tested. A sine-wave with 620 Vac peak to peak amplitude and 50 Hz frequency has been gained in the inverter?s  output and the quality of the voltage and current waveforms has been evaluated for different two 1.8 kΩΩ\Omega and 600 ΩΩ\Omega   resistive loads in the one-phase structure. Experimental results confirm all mathematical and simulation results.

Article Details

THD minimization for Z-source-based inverters with a novel sinusoidal PWM switching method

Authors: Davood GHADERI

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2019 Vol.27 Issue 4, pp.3098-3113

Document Type: Article

Publication Date: 7/2019

Document Language: English

Document ID (Org No.): 2000733897

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Davood GHADERI

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2019 Vol.27 Issue 4, pp.3098-3113

Document Type:

Article

Publication Date:

7/2019

Document Language:

English

Document ID (Org No.):

2000733897

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632