scholarly journals Fast optimum-predictive control and capacitor voltage balancing strategy for bipolar back-to-back NPC converters in high-voltage direct current transmission systems

2011 ◽  
Vol 5 (3) ◽  
pp. 368 ◽  
Author(s):  
M. Chaves ◽  
E. Margato ◽  
J.F. Silva ◽  
S.F. Pinto ◽  
J. Santana
Keyword(s):  
Predictive Control ◽  
High Voltage ◽  
Direct Current ◽  
Transmission Systems ◽  
Voltage Balancing ◽  
High Voltage Direct Current ◽  
Current Transmission ◽  
Capacitor Voltage

scholarly journals Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct Current Transmission Systems

2014 ◽  
Vol 47 (3) ◽  
pp. 11910-11916 ◽  
Author(s):  
Martin Andreasson ◽  
Mohammad Nazari ◽  
Dimos V. Dimarogonas ◽  
Henrik Sandberg ◽  
Karl H. Johansson ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Current Control ◽  
Transmission Systems ◽  
High Voltage Direct Current ◽  
Current Transmission

scholarly journals Voltage Balancing Method on Expert System for 51-Level MMC in High Voltage Direct Current Transmission

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Yong Chen ◽  
Xu Zhang
Keyword(s):  
Expert System ◽  
High Voltage ◽  
Direct Current ◽  
Transmission System ◽  
Voltage Source ◽  
Switching Frequency ◽  
Voltage Balancing ◽  
Hvdc System ◽  
High Voltage Direct Current ◽  
Capacitor Voltage

The Modular Multilevel Converters (MMC) have been a spotlight for the high voltage and high power transmission systems. In the VSC-HVDC (High Voltage Direct Current based on Voltage Source Converter) transmission system, the energy of DC link is stored in the distributed capacitors, and the difference of capacitors in parameters and charge rates causes capacitor voltage balance which affects the safety and stability of HVDC system. A method of MMC based on the expert system for reducing the frequency of the submodules (SMs) of the IGBT switching frequency is proposed. Firstly, MMC with 51 levels for HVDC is designed. Secondly, the nearest level control (NLC) for 51-level MMC is introduced. Thirdly, a modified capacitor voltage balancing method based on expert system for MMC-based HVDC transmission system is proposed. Finally, a simulation platform for 51-level Modular Multilevel Converter is constructed by using MATLAB/SIMULINK. The results indicate that the strategy proposed reduces the switching frequency on the premise of keeping submodule voltage basically identical, which greatly reduces the power losses for MMC-HVDC system.

scholarly journals Improved Two-Level Voltage Source Converter for High-Voltage Direct Current Transmission Systems

2017 ◽  
Vol 5 (4) ◽  
pp. 1670-1686 ◽  
Author(s):  
Grain Philip Adam ◽  
Ibrahim Abdelsalam ◽  
John Edward Fletcher ◽  
Lie Xu ◽  
Graeme M. Burt ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Transmission Systems ◽  
High Voltage Direct Current ◽  
Current Transmission
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