Results 71 to 80 of about 1,041,598 (189)

Overcurrent relay setting by using adaptive technique [PDF]

, 2014
As cost-effective protection relays, Overcurrent (OC) relays are used as the main protection equipment in distribution grids and backup protection for distance relays in transmission and sub-transmission lines. Basically, two parameters are considered as
Esmaili, Parisa
core  

Real‐Time Fault Detection and Classification in Active MV Distribution Networks Using Compact Feature–Based Ensemble Learning Under DG Infeed With Field Validation on the Moroccan Grid

International Transactions on Electrical Energy Systems, Volume 2026, Issue 1, 2026.
Reliable fault diagnosis in medium‐voltage distribution networks remains difficult due to measurement noise, variability in operating conditions, and the limited computational resources typically available in protection hardware. To address these constraints, the present paper introduces a compact and relay‐compatible framework that integrates ...
Saad Sarih, Samira Chabaa, Zakaria Boulghasoul, Abdelhadi ElBacha, Abdelouahed Tajer, Anamika Yadav   +5 more
wiley   +1 more source

Optimum Coordination Approach for Directional Overcurrent Relays in Interconnected Power Systems Considering Uncertainty in Photovoltaic Generation

IEEE Access
Optimizing the sensitivity and speed of the overcurrent protection system in the presence of distributed generation units while also ensuring the cost-effective design of the fault current limiter (FCL) represents great challenges for engineers.
Mahmoud A. Elsadd, Hossam A. Abd El-Ghany, Mohamed S. Zaky, Almoataz Y. Abdelaziz, Eman S. Ahmed   +4 more
doaj   +1 more source

Ant Lion Optimizer for Optimal Coordination of DOC Relays in Distribution Systems Containing DGs

IEEE Access, 2018
Traditionally, the distribution system is typically radial and the protection system has been designed for this purpose. After increasing the distributed generations (DG) in distribution systems, the direction of the electrical power flow and the short ...
A. Y. Hatata, Alnufaie Lafi
doaj   +1 more source

An Improved Communication-Free Dual Characteristic Over Current-Based Protection Scheme for AC Microgrids

International Transactions on Electrical Energy Systems
The entry of distributed generation causes the network to become complicated, and as a result, the protection coordination between the network equipment is lost.
Hossein Mohammadi Panah, Behrooz Zaker, Haidar Samet   +2 more
doaj   +1 more source

Finding Optimal Zone II Settings for Distance Relays in Coordination With Directional Overcurrent Relays Using QCQP Algorithm

IEEE Access
This paper introduces a deterministic method to address coordination challenges between distance relays (DS) and directional overcurrent relays (DOR) by employing quadratic programming with quadratic constraints (QCQP).
N. Praneeth, S. T. P. Srinivas, Alivelu M. Parimi, J. Ankamma Rao, Getie Tesfaye Zelie   +4 more
doaj   +1 more source

Grid Fragility, Blackouts, and Control Co‐Design Solutions

Advanced Control for Applications, Volume 7, Issue 3, September 2025.
Hierarchical grid control and GRADIENTS categories. ABSTRACT The grid is undergoing a large‐scale transformation, including a significant reduction of synchronous generators, a high penetration of inverter‐based resources and renewables, substantial demand growth, new extra‐large loads, aging infrastructure and a concerning vulnerability to ...
Mario Garcia‐Sanz, Mirjana Marden, Igor Cvetkovic, HyungSeon Oh, Ethan LoCicero, Saba Khalid   +5 more
wiley   +1 more source

Adaptive harmonic-based protection coordination for inverter-dominated isolated microgrids considering N-1 contingency

International Journal of Electrical Power & Energy Systems
Protection coordination is typically approached considering the main network configuration. Nevertheless, contingencies such as generator or line failures may disrupt power grids.
Talal Elemamali Sati, Maher A. Azzouz, Mostafa F. Shaaban   +2 more
doaj   +1 more source

Rekonfigurasi Relai Proteksi setelah Penambahan Pembangkit Tersebar pada Jaringan Distribusi

Jurnal Nasional Teknik Elektro, 2017
Installation of distributed generation (DG) on a distribution network can change the direction of electrical current during normal and faulted condition. This change can cause failures to operate of the existing relay protection.
Adrianti Adrianti, Nurul Mukhlisiah
doaj   +1 more source

Integrated Curve and Setting Optimization for DOCRs in Microgrid Environments with a BRKGA-MILP Matheuristic

Energies
Guaranteeing the effective coordination of directional overcurrent relays (DOCRs) within microgrids (MGs) is a complex nonlinear problem due to bidirectional power flows, varying fault current levels, and the need for adaptive operation across multiple ...
León F. Serna-Montoya, Sergio D. Saldarriaga-Zuluaga, Jesús M. López-Lezama, Nicolás Muñoz-Galeano, Juan G. Villegas   +4 more
doaj   +1 more source