Modular Multi-level Converter for Medium Voltage Applications with Mixed Sub-module Voltages within Each Arm
- 1 October 2018
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-6
Abstract
Modular Multi-level Converters (MMC) for medium voltage applications need to be compact and low-loss but also must have good waveform quality. This makes the choice of Sub-Module (SM) voltage rating and quantity a challenging compromise. An extra degree of design freedom is possible if modules in each arm are a mixture of nominal voltage ratings. A design is investigated here with several high voltage SMs for bulk power processing and two low voltage SMs for waveform following control. Power loss, efficiency and total harmonic distortion are compared against two designs of conventional MMC of equivalent power rating and waveform distortion level, but different SM voltage choices. A new low-level controller for SM rotation is devised which deploys different SM types for the different purposes, but also ensures charge balancing. Simulation results show reduced power loss for an MMC with mixed voltage-rated SMs within the same arm, when compared against the conventional MMCs.Keywords
This publication has 12 references indexed in Scilit:
- Dynamic control of MVDC link embedded in distribution network: — Case study on ANGLE-DC2017
- Asymmetric cascaded H-bridge topology with 25-level output voltage based on modular multilevel DSCC inverters2017
- A new hybrid modular multilevel converter with increased output voltage levels2017
- Review and development of MMC employed in VSC-HVDC systems2017
- Cell capacitor sizing in multilevel converters: cases of the modular multilevel converter and alternate arm converterIET Power Electronics, 2015
- Integrating smart meter and electric vehicle charging data to predict distribution network impacts2013
- Power loss and thermal characterization of IGBT modules in the Alternate Arm converter2013
- Comparison of the chip area usage of 2-level and 3-level voltage source converter topologies2010
- Increasing distributed generation penetration using soft normally-open points2010
- A Hybrid Capacitor-Clamp Cascade Multilevel ConverterIECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006