NDLI: A simplified method for controlling the Modular Multi-level Converter energy based on modified Carrier Phase-Shift Modulation

Content Provider	IEEE Xplore Digital Library
Author	Liao, Wu Huang, Shoudao Huang, Sheng Chu, Yanchao
Copyright Year	2014
Description	Author affiliation: College of Electrical and Information Engineering Hunan University. Changsha 410082 (Liao, Wu; Huang, Shoudao; Huang, Sheng; Chu, Yanchao)
Abstract	In Modular Multilevel Converter (MMC), each sub-module requires a voltage control loop for stabilizing capacitors voltage based on the traditional Carrier Phase-Shift Modulation(CPSM), with the number of sub-modules increases, control becomes more and more complex, this article propose a simplified control method to stabilize capacitors voltage based on simplified model of modular multilevel converter and modified Carrier Phase-Shift Modulation, in the simplified model, the upper arm and lower arm can be regarded as one sub-module with high switching frequency. This paper analyses the dynamic model of energy stored in the upper and lower arm, designed the upper and lower arm energy controller to maintain the energy of the upper and lower arm stable. With the modified Carrier Phase-Shift Modulation, the energy can distribute to each submodules without the need the arm current direction. This method solves the drawbacks each sub-module requires a separate voltage controller in the conventional Carrier Phase-Shift Modulation(CPSM), only two controllers is being used in one phase. This method greatly simplify the structure of the control system. Simulation results verify the proposed control method.
Starting Page	2454
Ending Page	2459
File Size	1910307
Page Count	6
File Format	PDF
ISBN	9781479951628
DOI	10.1109/ICEMS.2014.7013918
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Voltage control Frequency control Mathematical model Control systems Insulated gate bipolar transistors Equations Energy Control Method Modular Multi-level Converter Voltage Balance Phase-Shifted Carrier-Based PWM
Content Type	Text
Resource Type	Article

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