Title :
Two techniques in comparison for UPS´s low generation of harmonic currents in the network
Author :
Bertoneri, M. ; Freri, G. ; Gregorio, De
Author_Institution :
Borri SpA, Bibbiena, Italy
Abstract :
The solutions to the problem of sinusoidal wave distortion caused by voltage and current harmonics are described for two families of currently mass-produced uninterruptible power supply (UPS) systems. The first UPS range is three-phase from 10 to 300 kVA, realized by a fully controlled thyristor bridge where the generated harmonics distortion reduction is obtained by means of standard filters. The second range of products, manufactured for telecommunication, is single-phase up to 20 kVA and is realized by a high-current frequency chopper at sinusoidal current. This solution yields a distortion in the range of 3% and a PF of 0.99
Keywords :
choppers (circuits); harmonics; telecommunication equipment; thyristor applications; uninterruptible power supplies; 10 to 300 kVA; UPS; filters; harmonics; high-current frequency chopper; single-phase; sinusoidal wave distortion; telecommunication; three-phase; thyristor bridge; Bridge circuits; Frequency; Harmonic distortion; Manufacturing; Power harmonic filters; Power system harmonics; Telecommunication control; Thyristors; Uninterruptible power systems; Voltage;
Conference_Titel :
Telecommunications Energy Conference, 1989. INTELEC '89. Conference Proceedings., Eleventh International
Conference_Location :
Florence
DOI :
10.1109/INTLEC.1989.88366
