A three-level Space Vector Modulation strategy for two-level parallel inverters
Authors
Miskiewicz, Milosz ; Johannesen, Arnstein
Term
4. term
Education
Publication year
2009
Pages
99
Abstract
This thesis presents a three-level Space Vector Modulation (SVM) method for two parallel two-level inverters that share a DC link. SVM is a switching technique that controls how inverters synthesize AC voltages from a DC supply. Here, "three-level" means the system produces three distinct voltage levels instead of two. The proposed strategy is compared with two established modulation approaches for parallel converters—synchronized pulses (both inverters switch at the same instants) and interleaved pulses (their switching instants are time-shifted)—and with a three-level SVM applied to a Neutral Point Clamped (NPC) inverter. A down-scaled laboratory converter setup was built. Measurements from the setup are compared with simulation results and discussed in the thesis.
Denne specialeafhandling præsenterer en tre-niveau Space Vector Modulation (SVM) til to parallelforbundne to-niveau-invertere, der deler et DC-link (en fælles jævnspændingsforbindelse). SVM er en omskiftningsteknik, der styrer, hvordan invertere danner vekselspænding ud fra en jævnspændingskilde. "Tre-niveau" betyder her, at systemet kan generere tre diskrete spændingsniveauer i stedet for to. Den foreslåede strategi sammenlignes med to eksisterende modulationsmetoder for parallelle konvertere: synkroniserede pulser (begge invertere skifter samtidig) og forskudte, såkaldt interleavede, pulser (skifter forskudt i tid), samt med en tre-niveau SVM for en Neutral Point Clamped (NPC) inverter. En nedskaleret konverteropstilling er bygget i laboratoriet. Målinger fra opstillingen sammenholdes med simulerede resultater og diskuteres i afhandlingen.
[This apstract has been rewritten with the help of AI based on the project's original abstract]
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