Research on the Voltage Balance Strategy of Modular Multilevel Converter

Ji Min Jing; Jing Ze Wang; Yan Chao Ji

doi:10.4028/www.scientific.net/AMR.1055.157

Paper Titles

Analysis of Technology and Quality Control Measures of Road Bridge Construction
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Optimization of the Damping Seat’s Body Structure Based on the Task Space
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Effect of Mount Position of Main Winch on Drilling Mast Strength in Rotary Drilling Rig
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Effect of Bionic Concave Surface to the Drag Reduction Performance of Cylinder Sealing Ring
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Research on the Voltage Balance Strategy of Modular Multilevel Converter
p.157

Fatigue Life Prediction of Gear Transmission Based on ANSYS
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Modeling and Predicting Grinding Force of the Grinding Process
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Research on Ultimate Bearing Capacity of Reinforced Concrete Columns Subjected to Fire
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Analysis and Optimization of Ride Comfort for Semi-Active Suspension Based on Variable Damping
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Research on the Voltage Balance Strategy of Modular Multilevel Converter

Abstract:

The modular multilevel converter (MMC) does not need clamping devices and multiple independent DC voltage source and has a modular structure which is easy to be extended to any level, share a DC side, easy to direct back to back four-quadrant operation and attracts widespread attention. Due to the use of sub-module MMC suspended on the DC side capacitor voltage divider provides synthetic AC output voltage required voltage level and therefore it is essential to the stable operation of the sub-module capacitor voltage balance of the MMC. In this paper, the factors affecting the MMC sub-module capacitor voltage balancing has been carried out a detailed analysis and this paper focuses on the nominal frequency erupted module capacitor voltage control strategies and the average low frequency sub-module capacitor voltage ripple suppression strategies.