A PETRI NETS BASED TECHNIQUE FOR FAULT DIAGNOSIS STUDIES IN POWER SYSTEMS

Yıl 2009, Sayı: 019, 93 - 108, 15.08.2009

Özgür Coşar Osman Sevaioğlu İlhan Koşalay , H.hüseyin Sayan

Öz

 A central controller requires quickly
locating and identifying the failure in power systems. The failure analysis
based on information taken from the physically distributed protective devices.
The process becomes difficult owing to the complexity of the power system
increasing. In this study, Petri nets are used as modeling tools to precisely
diagnose faults when some uncertain and incomplete alarm information of
protective devices is detected.  Firstly,
a general literature survey of fault diagnosis in power systems is given. Then,
models of fault diagnosis based on MATLAB SIMULINK have been developed. A power
system network which has 5 buses, 48 over current relays, 48 circuit breakers,
23 transmission lines and 20 loads is used as test network. Finally, the
validity and feasibility of the proposed method is demonstrated by simulation
examples. The proposed system is tested with nine fault cases. Results of these
tests are given in order. It is shown from nine cases that the faulted power
system elements can be diagnosed accurately by using the Petri nets based fault
diagnosis models.

 

Anahtar Kelimeler

Petri nets, fault diagnosis, power system, MATLAB/SIMULINK

GÜÇ SİSTEMLERİNDE ARIZA TEŞHİSİ İÇİN PETRI NET TABANLI BİR YÖNTEM

Öz

Güç
sistemlerindeki  merkezi kontrolcüler, arızanın hızlı bulunmasını ve
tanımlanmasına ihtiyaç gösterirler. Hata analizi için bilgiler fiziksel olarak
daima koruyucu cihazlardan alınır. Güç sistemi büyüdükçe bu işlemler giderek
zorlaşır. Bu çalışmada, koruyucu cihazlardan gelen alarm işlemlerini teşhiste
kullanmak için, Petri netler modelleme aracı olarak kullanılmıştır. Çalışmada
önce, güç sistemlerinde arıza analizi için genel literatür çalışmaları
verilmiştir. .Daha sonar, MATLAB  a
dayalı arıza teşhisi modelleri geliştirilmiştir. 5 bara, 48 aşırı akım röleli,
48 devre kesicili, 23 iletim hatlı ve 20 yük barındıran bir güç ssitemi
devresi, test devresi olarak kullanılmıştır. Teklif edilen metodun geçerliliği
ve incelemesi simülasyon örnekleriyle sunulmuştur.

 Önerilen sistem, 9 arıza durumu için test
edilmiştir. Test sonuçları sıralı olarak verilmiştir.

 

Anahtar Kelimeler

Petri nets, arıza teşhisi, güç sistemi, MATLAB/SIMULINK

Kaynakça

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