Sequential tripping strategy for a transmission network back-upprotection expert system |
| |
Authors: | Tan JC Crossley PA McLaren PG Hall I Farrell J Gale P |
| |
Affiliation: | Manitoba Univ., Winnipeg, Man.; |
| |
Abstract: | This paper describes a sequential tripping strategy used in a wide area back-up protection expert system (BPES) to combat situations in which protection relays have maloperated or information is missing. The BPES is an innovative back-up protection scheme designed to prevent the occurrence of widespread blackouts. The BPES evaluates the certainty that transmission lines are likely to be affected by the fault and uses a sequential tripping strategy to isolate the fault if a firm decision is not available due to maloperated relays and/or missing information. The mode of analysis and the sequential tripping strategy ensures that the BPES will clear a fault at minimum risk to the network. An example is included to demonstrate how the certainty factor based sequential tripping strategy is employed by the BPES to clear a fault which occurred on the South Western part of the UK National Grid System |
| |
Keywords: | |
|