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

fYear

1992

fDate

4-7 May 1992

Firstpage

10

Lastpage

14

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICPS.1992.163378

Filename

163378