Title :
Reliability optimization of PLC-integrated high-quality power supply protection systems
Author :
Grasselli, Umberto ; Parise, Giuseppe ; Prudenzi, Alberto
Author_Institution :
Dept. of Electr. Eng., Rome Univ., Italy
Abstract :
The authors deal with the analysis of some possibilities related to the adoption of the programmable logic controller (PLC) in a protection system for a medium-voltage electrical installation. A reliability evaluation of the entire protection system as obtained with PLC adoption is performed in order to point out every possible advantage of this promising technical solution. A correct reliability evaluation of PLC integrated solutions must analyze the entire system behavior if there is a PLC failure to indicate improved reliability indices of the whole system. On the basis of numerical evaluations, some design criteria on protection system logic are proposed, which allows achievement of a noticeable improvement of these indices, by means of an appropriate choice of tripping logic between positive and negative
Keywords :
optimisation; power supplies to apparatus; programmable controllers; protection; reliability; MV electrical installation; PLC integrated solutions; power supply protection systems; programmable logic controller; reliability optimization; tripping logic; Circuit faults; Delay; IEEE members; Logic design; Power supplies; Power system protection; Power system reliability; Programmable control; Protective relaying; Thermal stresses;
Conference_Titel :
Industrial and Commercial Power Systems Technical Conference, 1992. Conference Record, Papers Presented at the 1992 Annual Meeting., IEEE Conference Record of the
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-0707-0
DOI :
10.1109/ICPS.1992.163378
