Title :
Input current harmonics in a regenerative multi-cell inverter with single-phase active rectifiers
Author :
Rodriguez, José ; Lezana, Pablo ; Pontt, Jorge ; Espinoza, José ; Pérez, Marcelo
Author_Institution :
Departamento de Electronica, Univ. Tecnica Federico Santa Maria, Valparaiso, Chile
Abstract :
Harmonics are a very important issue in the design and operation of medium voltage inverter drives due to restrictions imposed by regulations. This paper studies the harmonics generated in a three-phase cascaded multi-cell inverter with single-phase active front end (AFE) at the input side of each cell. This study identifies accurately the origin of the harmonics present in the DC link voltage and in the input currents and discusses methods to reduce and, in some cases, eliminate them. It has been established that the low-frequency harmonics in the primary input current can be cancelled by an appropriate interconnection of the cells and of the input transformer.
Keywords :
electric drives; invertors; power conversion harmonics; rectifying circuits; input current harmonics; low-frequency harmonics; medium voltage inverter drives; primary input current; regenerative multi-cell inverter; single-phase active front end; single-phase active rectifiers; three-phase cascaded multi-cell inverter; Control systems; Frequency; Medium voltage; Pi control; Process design; Proportional control; Pulse width modulation inverters; Rectifiers; Shape control; Voltage control;
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
DOI :
10.1109/IECON.2002.1185397