Title :
Novel active uninterruptible power supply using high frequency ZVS cycloconverters
Author :
Lima, Floriberto ; Anunciada, Victor
Author_Institution :
Inst. de Telecomunicoes, Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
This paper presents a new UPS topology, the active UPS (AUPS). The AUPS uses two high frequency cycloconverter circuits connected by a high frequency AC link. A full bridge inverter maintains the high frequency AC link power. One cycloconverter is connected in series with the mains, acting as a high impedance sinusoidal current source, and the other is connected in parallel with the load, maintaining a sinusoidal output of 230 VAC. This system permits low harmonics input current and low harmonics output voltage, even with nonlinear loads, load protection and reduced power processing during nonfault operation. In order to validate the theoretical and simulation results a 3000 W lab prototype is under development. Some results are presented in this paper
Keywords :
bridge circuits; cycloconvertors; electric current control; invertors; switching circuits; uninterruptible power supplies; voltage control; 230 V; 3000 W; UPS topology; active UPS; active uninterruptible power supply; full bridge inverter; high frequency AC link; high frequency AC link power; high frequency ZVS cycloconverters; high impedance sinusoidal current source; input current control; load protection; low harmonics input current; low harmonics output voltage; nonfault operation; nonlinear loads; output voltage control; reduced power processing; Bridge circuits; Circuit topology; Frequency; Impedance; Inverters; Low voltage; Power system harmonics; Power system protection; Uninterruptible power systems; Zero voltage switching;
Conference_Titel :
Industrial Electronics, 2000. ISIE 2000. Proceedings of the 2000 IEEE International Symposium on
Conference_Location :
Cholula, Puebla
Print_ISBN :
0-7803-6606-9
DOI :
10.1109/ISIE.2000.930496
