Title :
Harmonics issues of three-phase diode rectifiers with a small DC link capacitor
Author_Institution :
R&D Centre, Danfoss Power Electron. A/S, Gråsten, Denmark
Abstract :
This paper presents effects of DC link capacitor sizes in a three phase diode rectifier on input current harmonics at a system level. A small DC link capacitor generates a resonant frequency with a line inductor which can affect and increase the input current harmonics. According to IEC 61000-3-2 and IEC 61000-3-12 standards, low order current harmonics of a power electronic system should be controlled below a certain limits but at a power system level, voltage harmonics are important and should be reduced. SABER simulations have been carried out for a three phase motor drive system with different DC link capacitors and at different power levels in order to analyze the input current harmonics and the power quality of the power network.
Keywords :
IEC standards; capacitor motors; harmonics suppression; power capacitors; power inductors; power supply circuits; power supply quality; rectifiers; IEC 61000-3-12 standard; IEC 61000-3-2 standard; SABER simulation; line inductor; low order input current harmonic; power electronic system; power network power quality; power system level; resonant frequency; small DC link capacitor; three phase diode rectifier; three phase motor drive system; voltage harmonic reduction; Capacitors; Frequency conversion; Harmonic analysis; Motor drives; Power system harmonics; Rectifiers; Resonant frequency; DC link capacitor; harmonics; power quality;
Conference_Titel :
Power Electronics and Motion Control Conference and Exposition (PEMC), 2014 16th International
Conference_Location :
Antalya
DOI :
10.1109/EPEPEMC.2014.6980623
