Results 21 to 30 of about 140 (105)

Improved Firefly Algorithm for the Optimal Coordination of Directional Overcurrent Relays

IEEE Access, 2019
In an electrical power network linear and non-linear models are used for directional overcurrent relay (DOCR) coordination issue by applying different heuristic techniques.
Tahir Khurshaid, Abdul Wadood, Saeid Gholami Farkoush, Chang-Hwan Kim, Jiangtao Yu, Sang-Bong Rhee   +5 more
doaj   +1 more source

Optimal Protection Coordination of Dual-Setting Relays With Inverse-Time and Definite-Time Characteristics

IEEE Open Access Journal of Power and Energy
Optimal protection coordination (OPC) is a well-established problem with numerous solution methods, including mathematical optimization and genetic algorithms.
Reynaldo S. Gonzalez, Ahmed Almoola, Krishna S. Ayyagari, Venkatanaga A. Aryasomyajula, Nikolaos Gatsis, Miltiadis Alamaniotis, Sara Ahmed   +6 more
doaj   +1 more source

Applying Hybrid PSO to Optimize Directional Overcurrent Relay Coordination in Variable Network Topologies

Journal of Applied Mathematics, 2013
In power systems, determining the values of time dial setting (TDS) and the plug setting (PS) for directional overcurrent relays (DOCRs) is an extremely constrained optimization problem that has been previously described and solved as a nonlinear ...
Ming-Ta Yang, An Liu
doaj   +1 more source

UEG Week 2025 Moderated Posters [PDF]

United European Gastroenterol J
United European Gastroenterology Journal, Volume 13, Issue S8, Page S189-S802, October 2025.
europepmc   +2 more sources

Adaptive Protection Coordination for Microgrids Using Dual‐Setting Directional Overcurrent Relays: A Real‐Time HIL Validation Approach

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This research presents a robust protection coordination strategy using dual‐setting directional overcurrent relays (DS‐DOCRs) and a novel optimisation approach to address challenges in adaptive protection. A modified objective function, incorporating primary and backup relay operating times along with coordination time intervals (CTIs), is designed to ...
Oussama Merabet, Aissa Kheldoun, Aidil Azwin Zainul Abidin, Saad Mekhilef, Nima Khosravi   +4 more
wiley   +1 more source

Optimal Linear Protection Scheme of Inverter‐Based Distributed Energy Resources: Meeting Fault‐Ride‐Through Requirement

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This paper presents a new two‐stage protection strategy for active distribution networks that not only addresses selectivity constraints along protected lines but also incorporates fault‐ride‐through (FRT) requirements of inverter‐based distributed energy resources (IBDERs). The proposed coordination strategy (PCS), which distinguishes it from previous
Amin Yazdaninejadi, Hossein Ebrahimi, Sajjad Golshannavaz, Zhiyi Li, Rajashik Paul   +4 more
wiley   +1 more source

Optimal Relay Coordination in Renewable Microgrids Using Multiobjective Optimization

International Transactions on Electrical Energy Systems, Volume 2026, Issue 1, 2026.
The penetration of distributed generation (DG) into distribution networks has transformed traditional protection philosophies, often resulting in protection miscoordination due to bidirectional fault currents and varying system topologies. This work presents an enhanced optimal coordination strategy for directional overcurrent relays (DOCRs) in a ...
Shahimol Basheer, K. C. Sindhu Thampatty, Wangqiang Niu   +2 more
wiley   +1 more source

Structural mechanisms for cold‐adapted activity of phosphoenolpyruvate carboxykinase

Protein Science, Volume 34, Issue 11, November 2025.
Abstract Temperature is a critical factor in enzyme function, as most enzymes are thermally activated. Across Earth's diverse environments (−20 to 120°C), enzymes have evolved to function optimally at their organism's growth temperature. Thermophilic enzymes must resist denaturation, while psychrophilic enzymes must maintain activity with limited ...
Matthew J. McLeod, Shauhin Yazdani, Sarah A. E. Barwell, Todd Holyoak   +3 more
wiley   +1 more source

Optimasi Time Dial Setting (TDS) Relay Arus Lebih Menggunakan Adaptive Modified Firefly Algorithm Pada Sistem Kelistrikan PT. Pupuk Kalimantan Timur

Jurnal Teknik ITS, 2017
Penggunaan relay arus lebih (over current relay) pada industri memerlukan pengaturan beberapa parameter seperti arus pickup (Ip), time dial setting (TDS), serta waktu operasi (top).
Vincentius Raki Mahindhara, Margo Pujiantara   +1 more
doaj  

Hierarchy in regulator interactions with distant transcriptional activation domains empowers rheostatic regulation

Protein Science, Volume 34, Issue 6, June 2025.
Abstract Transcription factors carry long intrinsically disordered regions often containing multiple activation domains. Despite numerous recent high‐throughput identifications and characterizations of activation domains, the interplay between sequence motifs, activation domains, and regulator binding in intrinsically disordered transcription factor ...
Amanda D. Due, Norman E. Davey, F. Emil Thomasen, Nicholas Morffy, Andreas Prestel, Inna Brakti, Charlotte O'Shea, Lucia C. Strader, Kresten Lindorff‐Larsen, Karen Skriver, Birthe B. Kragelund   +10 more
wiley   +1 more source