scholarly journals Control strategies for capacitor voltage balancing in modular multilevel converters

2016 ◽  
Author(s):  
Osama Abushafa ◽  
Shady Gadoue ◽  
Mohamed Dahidah ◽  
David Atkinson ◽  
Salaheddine Ethni
Keyword(s):  
Control Strategies ◽  
Multilevel Converters ◽  
Voltage Balancing ◽  
Modular Multilevel Converters ◽  
Capacitor Voltage

scholarly journals A Simple Capacitor Voltage Balancing Method with a Fundamental Sorting Frequency for Modular Multilevel Converters

2014 ◽  
Vol 14 (6) ◽  
pp. 1109-1118 ◽  
Author(s):  
Hao Peng ◽  
Ying Wang ◽  
Kun Wang ◽  
Yan Deng ◽  
Xiangning He ◽  
...  
Keyword(s):  
Multilevel Converters ◽  
Voltage Balancing ◽  
Modular Multilevel Converters ◽  
Capacitor Voltage

scholarly journals Current Balancing Control for Interleaved Half-Bridge Submodules in Modular Multilevel Converters

2021 ◽  
Author(s):  
Aleksandr Viatkin ◽  
Mattia Ricco ◽  
Riccardo Mandrioli ◽  
Tamas Kerekes ◽  
Remus Teodorescu ◽  
...  
Keyword(s):  
Dynamic Performance ◽  
Experimental Tests ◽  
Current Control ◽  
System Response ◽  
Loop Current ◽  
Multilevel Converters ◽  
Voltage Balancing ◽  
Modular Multilevel Converters ◽  
Capacitor Voltage ◽  
Balancing Control

This paper presents a closed-loop current balancing control for Modular Multilevel Converters with Interleaved half-bridge Sub-Modules (ISM-MMC). The new control loop solves the well-known problem of proper current balancing among interleaved half-bridge legs in each ISM-MMC submodule while preserving a simple and reliable structure. In addition to that, a novel capacitor voltage balancing strategy for MMCs is developed. The new algorithm contains main advantages of the classical capacitor voltage balancing methods while provides an opportunity to decouple two balancing tasks of ISM-MMC, namely capacitor voltage and interleaved legs current balancing. The proposed control methods feature good dynamic performance and are compliant with a digital processor's operational constraints. The effectiveness of the new balancing methods was verified during extensive numerical simulations and experimental tests on a laboratory prototype by the corresponding system response under the input/output characteristics variation and interleaved current control perturbation.

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