scholarly journals Control of a hybrid modular multilevel converter during grid voltage unbalance

2015 ◽  
Author(s):  
E.K. Amankwah ◽  
A.J. Watson ◽  
J.C. Clare ◽  
P.W. Wheeler
Keyword(s):  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Grid Voltage ◽  
Voltage Unbalance

A current controller for the modular multilevel converter operating under distorted grid voltage

2018 ◽  
Vol 28 (4) ◽  
pp. e2524 ◽  
Author(s):  
Glendy A. Catzin Contreras ◽  
Gerardo Escobar ◽  
Andres A. Valdez-Fernandez ◽  
Manuel J. Lopez-Sanchez
Keyword(s):  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Grid Voltage ◽  
Current Controller ◽  
Distorted Grid ◽  
A Current

scholarly journals A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 147280-147291
Author(s):  
Qian Xiao ◽  
Yu Jin ◽  
Linglin Chen ◽  
Xiaodan Yu ◽  
Hongjie Jia ◽  
...  
Keyword(s):  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Grid Voltage ◽  
Medium Voltage ◽  
Simple Operation ◽  
Voltage Swell

scholarly journals Integration of Photovoltaic Power Units to Power Distribution System through Modular Multilevel Converter

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2753 ◽  
Author(s):  
Seyed Hakimi ◽  
Amin Hajizadeh
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Lyapunov Theory ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Power Distribution System ◽  
Grid Voltage

With the growing of using photovoltaic (PV) units in power distribution systems, the role of high-performance power electronic converters is increasing. In this paper, modelling and control of Modular Multilevel Converter (MMC) are addressed for grid integration of PV units. Designing a proper controller for MMC is crucial during faulty conditions to make the converter stable and provide proper dynamic performance. To achieve this goal, a dynamic model of MMC is presented which it includes symmetrical components of voltage and current. Then, adaptive robust current controllers are developed based on sliding mode and fuzzy controllers for MMC and then the robustness and stability of the controllers are proved by the Lyapunov theory. To implement the proposed controllers under unbalanced grid voltage fault, positive and negative sequences current controllers are implemented to compensate the effect of grid voltage fault and load power variation. Finally, numerical results are shown to evaluate the performance of MMC. In the end, the experimental results are given to prove the controller performance. The outcome indicates that the proposed current controllers are more effective under voltage disturbance conditions and could satisfy the stability of MMC.

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