| Abstract |
This paper examines a novel three-level space vector modulation method applied to a vector
controlled VIENNA I rectifier. The principle modulation algorithm operation, basic assumptions and
restrictions due to the main circuit are analysed. On the basis of the key equations derived from the
system examined, the vector control system is realised. The theoretical analysis of the proposed
modulation technique and vector control system is verified by Simplorer and Matlab Simulink
simulations, taking into consideration the total harmonic line current distortion, the losses in the active
and passive components, delays and switching transients of the semiconductor devices. The rectifier
system is designed to operate at a nominal DC link output power of 50kW, DC link voltage 650V and
applied switching frequency 3.5kHz. The L filter is designed so that the total harmonic line current
distortion is 4%. |
