Modified carrier-based over-modulation technique for improved switching performance of multilevel converters
Md. Ashib Rahman,Md. Rabiul Islam,Youguang Guo,Jianguo Zhu,Gang Lei +4 more
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TLDR
In this paper, a modified over-modulation (OVM) scheme with phase disposed carriers was proposed to improve the switching performance of a cascaded H-bridge multilevel converter.Abstract:
A modified over-modulation (OVM) scheme with phase disposed carriers to improve switching performance of cascaded H-bridge multilevel converter is depicted in this article. With the regular OVM techniques, pulse dropping region has higher conduction loss, greater signal distortion and voltage gain. In the proposed OVM method, the switching and conduction loss scenario is improved with lower harmonic distortion. Also, the voltage gain can be increased up to limited range. Four types of reference signals, such as pure sinusoidal signal, sinusoidal 60° bus clamped signal, third harmonic injected signal and third harmonic injected 60° bus clamped signal are used to investigate the overall performance with the proposed OVM method. The OVM technique is applied to a 3.0 kV, 120 kW, 5-level cascaded H-bridge converter and simulated in MATLAB/Simulink environment. The results demonstrate reduced output harmonic distortion, increased voltage gain, lower switching and conduction loss as well as improved efficiency on the whole.read more
Citations
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Journal ArticleDOI
Over Modulation Strategy of Power Converters: A Review
TL;DR: The research status, existing problems, and development trend of overmodulation strategy for the PWM converters are comprehensively presented in this paper.
Journal ArticleDOI
A Modified Carrier-Based Advanced Modulation Technique for Improved Switching Performance of Magnetic-Linked Medium-Voltage Converters
Md. Ashib Rahman,Md. Rabiul Islam,Kashem M. Muttaqi,Youguang Guo,Jianguo Zhu,Danny Sutanto,Gang Lei +6 more
TL;DR: A modified OVM scheme with phase-disposed carriers for a grid-connected high-frequency magnetic-link-based cascaded H-bridge (CHB) MLC is proposed for the suppression of harmonics and the reduction of converter loss.
References
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TL;DR: In this article, a generalization of the Pulse Width Modulation (PWM) subharmonic method for controlling single-phase or three-phase multilevel voltage source inverters (VSIs) is considered.
Journal ArticleDOI
Relationship between space-vector modulation and three-phase carrier-based PWM: a comprehensive analysis [three-phase inverters]
Keliang Zhou,Danwei Wang +1 more
TL;DR: This paper comprehensively analyzes the relationship between space-vector modulation and three-phase carrier-based pulse width modulation and shows that all the drawn conclusions are independent of the load type.