Control and modulation strategies for MMC - based HVDC

Student thesis: Master Thesis and HD Thesis

  • Marcos Rejas Haddioui
4. term, Energy Engineering, Master (Master Programme)
MMC is a new topology that has revolutionized the VSCHVDC for electrical transmission over long distances and interconnecting asynchronous AC grids. Being a very complex and distributed plant, the modulation become more challenging. The purpose of this thesis is to analyse the existing modulation techniques and propose improved solutions that are able to: improve the capacitor voltage balancing, reduce the switching frequency and uniformly distribute the losses among power switches. A comparison of different modulation techniques has been carried out for several converter power ratings, a small scale prototype and a HVDC system, in order to compare their performance. Finally a small scale prototype has been designed and built in order to validate the simulation results.
SpecialisationPower Electronics and Drives
Publication date27 May 2015
Number of pages92
ID: 213007942