Protective Device Coordination Expert System

Author

Hong, H. Wayne ; Sun, Chuen-Tsai ; Mesa, V.M. ; Ng, Steven

Author_Institution

Pacific Gas & Electr. Co., San Francisco, CA, USA

Volume

6

Issue

1

fYear

1991

fDate

1/1/1991 12:00:00 AM

Firstpage

359

Lastpage

365

Abstract

The Protective Device Coordination Expert System (PDCES) software is presented. It helps electric distribution engineers correct miscoordinated protective device pairs. PDCES was prototyped as a component of the Pacific Gas & Electric Company´s Electric Distribution Planning Analysis (EDPLAN) system, an in-house engineering tool for analyzing electric distribution feeders. PDCES evaluates the causes of miscoordination, suggests and ranks coordination remedies, and, at the user´s discretion, sequentially identifies the most appropriate course of corrective actions. It then triggers EDPLAN to reset protective device parameters to alleviate feeder miscoordination. Protective devices studied by PDCES include relays, fuses, reclosers, and interrupters. PDCES contains 14 knowledge bases and more than 300 rules and invokes 2 graphical displays: a distribution network´s fishbone diagram and a geographical configuration. An expert system shell was used to provide rapid prototyping, a friendly user interface, knowledge base construction, knowledge inference, and external program capabilities

Keywords

distribution networks; engineering graphics; expert systems; power system analysis computing; power system protection; software packages; EDPLAN; PDCES; Protective Device Coordination Expert System; USA; distribution feeders; fuses; graphical displays; interrupters; knowledge bases; knowledge inference; miscoordination; power system protection; reclosers; relays; software packages; user interface; Design engineering; Expert systems; Fuses; Interrupters; Protection; Protective relaying; Prototypes; Software prototyping; Software systems; Systems engineering and theory;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.103759

Filename

103759