Title :
Performance analysis of parallel-processing UPS systems
Author :
Lin, Y. ; Joos, G. ; Lindsay, J.F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
Parallel-processing inverter-based uninterruptible power supply (UPS) systems have advantages over the conventional rectifier-inverter systems. Control is more complex and design tools are not readily available. The modeling, control and performance of a typical system are analyzed, and important parameters are identified. This UPS consists of an inverter-battery subsystem in shunt between the AC mains and the load. Two control loops are employed to fully exploit the advantages of the proposed UPS system: (1) a fast load voltage regulation loop; and (2) a slower battery charging loop. Mathematical models are developed to design the required regulators and compensation networks for both loops. The predicted performance characteristics are verified by simulation. Experimental results on a 5 kVA unit confirm the theoretical analyses
Keywords :
battery chargers; compensation; invertors; secondary cells; uninterruptible power supplies; voltage control; 5 kVA; AC mains; UPS; battery charging; compensation; control; design; invertors; load; modeling; parallel-processing; performance; secondary cells; shunt; uninterruptible power supply; voltage regulation; Batteries; Control systems; Inverters; Mathematical model; Performance analysis; Power harmonic filters; Reactive power; Shunt (electrical); Uninterruptible power systems; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1993. APEC '93. Conference Proceedings 1993., Eighth Annual
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0983-9
DOI :
10.1109/APEC.1993.290714
