Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
174 Conclusions and Outlook<br />
8.3 Summary of original contributions<br />
- A g<strong>en</strong>eric framework for ML repres<strong>en</strong>tation, analysis and synthesis has be<strong>en</strong> introduced.<br />
o It has be<strong>en</strong> shown that most converters according to the state of the art fit in that<br />
framework<br />
o New 3-L DC link topologies have be<strong>en</strong> inv<strong>en</strong>ted based on that framework.<br />
- A large set of ML converters has be<strong>en</strong> compared regarding a set of criteria including.<br />
o Switch requirem<strong>en</strong>ts including scaling laws<br />
o Flying capacitor <strong>en</strong>ergy requirem<strong>en</strong>ts including scaling laws<br />
- Properties of 3-L DC link topologies have be<strong>en</strong> investigated.<br />
o Exploration of redundant states and introduction of the virtual vectors of the 5-L<br />
ANPC<br />
o NP curr<strong>en</strong>t repres<strong>en</strong>tation as a function of CM voltage and θ, giving insight to the<br />
NP curr<strong>en</strong>t characteristics and supporting the <strong>de</strong>finition of new control schemes<br />
- New modulation and control schemes have be<strong>en</strong> introduced<br />
o Real-time NP curr<strong>en</strong>t scheme and 6 th harmonic injection suitable for all 3-L DC<br />
link topologies including the NPC<br />
o Specific CB PWM schemes making use of redundant state for the ANPC 3 and the<br />
SMC with significant improvem<strong>en</strong>t of the NP curr<strong>en</strong>t control capacity<br />
o Virtual vector sequ<strong>en</strong>ce modulation for the ANPC 1 with significant improvem<strong>en</strong>t<br />
of the NP curr<strong>en</strong>t control capacity<br />
<br />
Exploration of the range of exist<strong>en</strong>ce of modified and virtual vectors<br />
o Online optimal sequ<strong>en</strong>ce modulation allowing for reduced switching losses<br />
coupled with good output harmonic performance<br />
- Application of multiple schemes within hysteresis NP controllers<br />
- Performance comparison of the differ<strong>en</strong>t modulation and control schemes