A Simplified Capacitor Voltage Balancing Method for Modular Multilevel Converter with Carrier-Phase-Shift Pulse Width Modulation

2019 ◽  
Author(s):  
Weiyao Wang ◽  
Ke Ma ◽  
Yunxiao Yang ◽  
Xu Cai
Keyword(s):  
Phase Shift ◽  
Carrier Phase ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Voltage Balancing ◽  
Capacitor Voltage

VHDL Implementation of Capacitor Voltage Balancing Control with Level-Shifted PWM for Modular Multilevel Converter

2016 ◽  
Vol 7 (1) ◽  
pp. 94
Author(s):  
Chuen Ling Toh ◽  
Lars Einar Norum
Keyword(s):  
Pulse Width Modulation ◽  
Power Transmission ◽  
Small Scale ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Voltage Balancing ◽  
High Voltage Direct Current ◽  
Capacitor Voltage ◽  
Balancing Control ◽  
Vhdl Implementation

Power electronics converters are a key component in high voltage direct current (HVDC) power transmission. The modular multilevel converter (MMC) is one of the latest topologies to be proposed for this application. An MMC generates multilevel output voltage waveforms which reduces the harmonics contents significantly. This paper presents a VHDL implementation of the capacitor voltage balancing control and level-shifted pulse width modulation (LSPWM) for MMC. The objective is to minimize the processing time with minimum gate counts. The design details are fully described and validated experimentally. An experiment is conducted on a small scale MMC prototype with two units of power cells on each arm. The test results are enclosed and discussed.

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