Power Loss Analysis of SHE-PWM Controlled Modified Modular Multilevel Converter
Power Loss Analysis of SHE-PWM Controlled Modified Modular Multilevel Converter |
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| © 2025 by IJETT Journal | ||
| Volume-73 Issue-7 |
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| Year of Publication : 2025 | ||
| Author : Preeti Kapoor, Sonali Rangari, Gaurav Goyal, Pragati Shrivastava Deb, Mohan Renge | ||
| DOI : 10.14445/22315381/IJETT-V73I7P111 | ||
How to Cite?
Preeti Kapoor, Sonali Rangari, Gaurav Goyal, Pragati Shrivastava Deb, Mohan Renge, "Power Loss Analysis of SHE-PWM Controlled Modified Modular Multilevel Converter," International Journal of Engineering Trends and Technology, vol. 73, no. 7, pp.127-137, 2025. Crossref, https://doi.org/10.14445/22315381/IJETT-V73I7P111
Abstract
The Modular Multilevel Converter (MMC) has emerged as a leading topology in the power converter family, attracting extensive global research and development interest. This paper presents a modified configuration of the MMC. In the modified configuration, an attempt has been made to replace the submodule capacitance with a separate DC source. The number of DC sources required is also reduced as lower submodules share a common DC link. The ‘2N+1’ level modulation technique has been employed to further reduce the number of submodules required to achieve the desired output voltage level. Due to its superior performance characteristics, the Modular Multilevel Converter (MMC) is a popular choice for high-power, medium-voltage applications. The converter efficiency in high-power applications is the paramount aspect. Therefore, the analysis of power loss must be conducted at the initial stage of converter design. For the induction motor control drive, the power loss calculation method in the bridge modified configuration of MMC is also presented in the paper. The method includes the calculation of conduction loss and switching loss. Energy dissipation through conduction of the MMC submodule depends upon duty cycle, load current, and power factor, whereas power losses caused by switching depend upon switching frequency. The converter has been controlled by applying the Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM) technique. In addition, the study presents a comparative evaluation of SHE-PWM and SPWM modulation techniques based on simulation results obtained under different operating scenarios. The proposed structure of three-phase three-level MMC has been analyzed, implemented and verified by developing a laboratory prototype controlling a low-power induction motor drive rated 746W, 415V. The experimental results of the modified configuration of MMC and power loss estimation that were presented confirm the simulated results.
Keywords
Modular multilevel converter, SHE-PWM, Induction motor, Conduction loss, Switching loss.
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