Title :
The parallel operation of two UPS by the coupled-inductor method
Author :
Chen, J.F. ; Chu, C.L. ; Huang, C.L.
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
For expanding uninterruptible power supply (UPS) capacity, the coupled-inductor method is proposed for the parallel operation of two UPSs in this paper. Because of the use of the magnetic coupling concept, the circulating current flowing through the respective inverters can be avoided, and the load can be automatically shared between the two UPSs. In parallel operation with the coupled-inductor method, a little error of phase angle between the UPSs can be allowed, so the control circuit is simple to implement in the practical application
Keywords :
invertors; load (electric); power inductors; uninterruptible power supplies; UPS; circulating current; control circuit; coupled-inductor method; inverters; load; magnetic coupling; parallel operation; uninterruptible power supply; Automatic control; Coupling circuits; Equivalent circuits; Error correction; Inductance; Inverters; Joining processes; Phase locked loops; Uninterruptible power systems; Voltage control;
Conference_Titel :
Industrial Electronics, 1992., Proceedings of the IEEE International Symposium on
Conference_Location :
Xian
Print_ISBN :
0-7803-0042-4
DOI :
10.1109/ISIE.1992.279701
