Possibilistic-diagnosis theory for fault-section estimation and state identification of unobserved protective relays using tabu-search method

作     者：Wen, FS Chang, CS 

作者机构：Natl Univ Singapore Dept Elect Engn Singapore 119260 Singapore 

出 版 物：《IEE PROCEEDINGS-GENERATION TRANSMISSION AND DISTRIBUTION》 (IEE Proc Gener Transm Distrib)

年 卷 期：1998年第145卷第6期

页      面：722-730页

核心收录：

主　　题：power system state estimation unobserved protective relays integer programming tabu-search method 0-1 integer programming model 0-1 programming model Optimisation techniques probability power system relaying tripping information parsimonious set covering theory operating reliabilities Switchgear relay protection power system protection state identification power systems Possibilistic-diagnosis theory Power system protection graded uncertainty Other topics in statistics circuit breakers power system faults fault-section estimation 

摘      要：In the paper an integrated approach is presented for fault-section estimation and state identification of those protective relays whose state information is not available in electrical power dispatching centres (hereafter the authors refer to these protective relays as unobserved protective relays) using tabu-search (TS) method. The proposed fault-section estimation method utilises incomplete operational information of protective relays and tripping information of circuit breakers, and is able to deal with tho operating reliabilities ii of protective relays and circuit breakers. At first, based on the logic relationship among section fault, protective relay operation and circuit breaker trip, a 0-1 integer programming model for fault-section estimation and state identification of unobserved protective relays (FSE-SIUPR) is presented. The developed model is based on recently proposed possibilistic-diagnosis theory under graded uncertainty and the well developed parsimonious set covering theory. In this model. the problem of the fault-section estimation under incomplete information from protective relays is dealt with in a formal and systematic manner, and the operating reliabilities of protective relays ana circuit breakers are taken into account at the same time. Secondly, the TS method is used to solve this 0-1 programming model to find the optimal solution efficiently. In addition. an efficient method for identification of faulty subnetworks which include all faulty sections is adopted by using the realtime information from circuit breakers. Extensive: test results of a sample power system have demonstrated the correctness of the developed mathematical model and the efficiency of the TS-based method.