Title :
A control method for high power UPSs in parallel operation
Author :
Martins, A. Pina ; Carvalho, Adriano S. ; Araujo, Armando S.
Author_Institution :
Fac. de Engenharia, Porto Univ., Portugal
Abstract :
The parallel operation of static inverters is, in a large number of cases, the appropriate solution to achieve the high power required by some applications or to improve system reliability. To higher the power in a lot of industrial applications is equivalent to adding a new UPS unit to an already existing one. In UPS systems there are situations where a high reliability/availability is required by critical loads. Parallel redundancy appears as an immediate solution to satisfy this requirement. This paper presents a control method for parallel operation of non redundant UPSs based on current control. Simulation results as well as experimental ones are presented. The overall control system is implemented on a simple and low cost platform
Keywords :
electric current control; invertors; power control; uninterruptible power supplies; availability; critical loads; current control; high power UPSs; industrial applications; parallel operation; reliability; static inverters; Active filters; Availability; Control systems; Costs; Current control; Electrical equipment industry; Frequency; Inverters; Open loop systems; Power harmonic filters; Power system reliability; Redundancy; Thyristors; Uninterruptible power systems; Voltage;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.504414
