Rule-based relay modelling for transient-stability studies

A novel approach to relay modeling for transient-stability studies is presented. It is based on a simulation language which offers many characteristics of AI (artificial intelligence) technology, it is close to natural, declarative, rule-based, and inclusive of concepts used in protective relaying. The proposed option gives users great autonomy, which would lead to better productivity since relay models and/or protection schemes can be developed within a few hours of the many weeks required under normal circumstances. Moreover, systems involving many coordinated relays can be easily described.<>