Efficient non-standard tripping characteristic-based coordination method for overcurrent relays in meshed power networks

2022 ◽  
Author(s):  
Mehdi Azari ◽  
Kazem Mazlumi ◽  
Mansour Ojaghi
Keyword(s):  
Power Networks ◽  
Overcurrent Relays

scholarly journals Optimal Coordination of Overcurrent and Distance Relays Using Cuckoo Optimization Algorithm

2015 ◽  
Vol 16 (3) ◽  
pp. 389
Author(s):  
Farhad Namdari ◽  
Sajad Samadinasab ◽  
Nader Shojaei ◽  
Mohammad Bakhshipour
Keyword(s):  
Power System ◽  
Optimization Algorithm ◽  
Power Network ◽  
Power Networks ◽  
Cuckoo Optimization Algorithm ◽  
Overcurrent Relays ◽  
Optimal Coordination ◽  
Distance Relays ◽  
Optimizing Algorithm ◽  
Protective Systems

The duty of protective systems is the timely detection of fault and removing it from the power network. The accuracy of the results and reducing the execution time of the optimizing algorithm are two crucial elements in selecting optimizing algorithms in protective functions. The most important protective elements that are used in power networks are distance and overcurrent relays. In this article, a new algorithm is presented to solve the optimization problem of coordination of overcurrent and distance relays by using Cuckoo Optimization Algorithm which considers the non-linear model overcurrent relays at all stages of setting. The proposed method is tested on a standard 8-bus power system network. Also the results obtained have been compared with other evolutionary algorithms. The results show that the proposed approach can be provide more effective and practical solutions to minimize the time function of the relays and achieving optimal coordination in comparison with previous studies on optimal coordination of overcurrent and distance relays in power system networks.

The Fate of Small Towns, Hilltop Settlements, and Elite Residences in Merovingian-Period Gaul

2020 ◽  
pp. 610-640
Author(s):  
Luc Bourgeois
Keyword(s):  
Middle Ages ◽  
Late Antiquity ◽  
Fourth Century ◽  
Small Towns ◽  
Seventh Century ◽  
Archaeological Research ◽  
Power Networks ◽  
Early Middle Ages ◽  
The Many

The study of places of power in the Merovingian realm has long been focused on cities, monasteries, and royal palaces. Recent archaeological research has led to the emergence of other categories. Four of them are addressed in this chapter. These include the capitals of fallen cities, which continue to mark the landscape in one way or another. Similarly, the fate of small Roman towns during the early Middle Ages shows that most of them continued to host a variety of secular and ecclesiastical powers. In addition, from the fourth century onward, large hilltop fortified settlements multiplied anew. They complemented earlier networks of authority, whether elite residences, artisan communities, or real towns. Finally, from the seventh century onward, the great aristocratic villas of late antiquity were transformed into settlements organized around one or more courtyards and supplemented by funerary and religious structures. The evolution of political spaces and lifestyles explains both the ruptures in power networks that occurred during the Merovingian epoch and the many continuities that can be seen in the four kinds of places studied in this chapter that were marked by these developments.

scholarly journals MILP formulation for controlled islanding of power networks

2013 ◽  
Vol 45 (1) ◽  
pp. 501-508 ◽  
Author(s):  
P.A. Trodden ◽  
W.A. Bukhsh ◽  
A. Grothey ◽  
K.I.M. McKinnon
Keyword(s):  
Power Networks ◽  
Controlled Islanding

Self controlling autonomous operating power networks

2005 ◽  
Author(s):  
F. Provoost ◽  
A. Ishchenko ◽  
A. Jokic ◽  
J.M.A. Myrzik ◽  
W.L. Kling
Keyword(s):  
Power Networks
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