Next Article in Journal
Sources of China’s Fossil Energy-Use Change
Previous Article in Journal
Implementation of Open Boundaries within a Two-Way Coupled SPH Model to Simulate Nonlinear Wave–Structure Interactions
Open AccessArticle

Voltage Jump Suppression and Capacitor Voltage Fluctuation Analysis for a Four-Level Hybrid Flying Capacitor T-Type Converter

1
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
2
Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1TH, UK
*
Author to whom correspondence should be addressed.
Energies 2019, 12(4), 698; https://doi.org/10.3390/en12040698
Received: 21 January 2019 / Revised: 8 February 2019 / Accepted: 18 February 2019 / Published: 21 February 2019
In low and medium voltage power conversion systems, multilevel converters are becoming more and more attractive due to improved power density. However, the complexity of topology and control is a big challenge for the application of multilevel converters. In this paper, a four-level (4L) hybrid flying capacitor (FC) T-type converter has been researched in detail. The topological advantage of the converter is displayed in comparison to existing four-level converters. According to the feature of the topology, the operating status has been analyzed and the reason for the voltage jump is researched in detail during the dead-time period. A strategy to reduce voltage jump by adjusting the switching states has be presented. The FC voltages can be balanced by selecting the appropriate switching states. The relationships between the fluctuations of FC voltages and the modulation index and power factor (PF) have been analyzed by simulation results. The performance of the 4L converter has been investigated in MATLAB/Simulink as well as on a down-scaled laboratory prototype. View Full-Text
Keywords: capacitor voltage fluctuation; dead-time; multilevel converter; voltage jump capacitor voltage fluctuation; dead-time; multilevel converter; voltage jump
Show Figures

Graphical abstract

MDPI and ACS Style

Wei, C.; Yuan, X.; Zhou, J.; Wang, K.; Zhang, Y.; Wu, X. Voltage Jump Suppression and Capacitor Voltage Fluctuation Analysis for a Four-Level Hybrid Flying Capacitor T-Type Converter. Energies 2019, 12, 698.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop