Results 81 to 90 of about 2,477 (219)

Coordination of Directional Overcurrent Relays using Growth Optimizer

Electrotehnica, Electronica, Automatica
The protection system plays a crucial role in the generation, transmission, and distribution systems of a power network. Among various protection relay types, Directional Overcurrent Relays (DOCRs) are the most used. When abnormal conditions are detected, these relays trigger the tripping of protection devices by detecting the direction and magnitude ...
Ridha Djamel MOHAMMED, Miloud KADDOURI, Abdelkader BELADEL   +2 more
openaire   +1 more source

Optimal Protection Planning and Coordination in Microgrids With SDGs, SFCLs, and OCR Using WOA

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
One of the critical challenges in power system protection is ensuring proper relay coordination. To achieve optimal coordination of protection systems and ensure security, fast cleaning, and selection of types of faults is a necessary priority. This priority, when hosting synchronous distributed generations (SDGs), although technical factors like power
Mohammad Hassan Tanha, Majid Gandomkar, Javad Nikoukar, Ayman Al-Quraan   +3 more
wiley   +1 more source

Advanced Three‐Level Characteristic of Overcurrent Relays Based on Non‐Standard Characteristic for Enhanced Microgrid Protection

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
The growing integration of distributed generations (DGs) and the islanding capabilities of microgrids (MGs) have fundamentally changed the configuration of power distribution networks (DNs), significantly impacting short‐circuit current levels and thereby, challenging the reliability of conventional protection systems.
Feras Alasali, Naser El-Naily, Haytham Y. Mustafa, Hassen Loukil, Abdelaziz Salah Saidi, William Holderbaum, Rajashik Paul   +6 more
wiley   +1 more source

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

Impedance‐Based Adaptive Droop Control for Islanded AC Microgrids and Overview

International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.
Recent improvements in the application of distributed energy resources (DERs) and microgrids (MGs) have made controlling these resources very important. However, there are still many challenges in this field. One of the anticipated challenges in islanded MGs (IMGs) is the mismatched output impedance of DERs, which affects the volt‐var regulation ...
Forough Qashqaie, Hadi Saghafi, Ramtin Sadeghi, Bahador Fani, Michele De Santis   +4 more
wiley   +1 more source

Protection of AC and DC Microgrids: Challenges, Solutions and Future Trends [PDF]

, 2015
In future, distributed energy resources (RESs) will be utilized at consumption points. As a consequence, power flow and fault current would be bidirectional and topologydependent; and hence the conventional protection strategies would be inefficient ...
Beheshtaein, Siavash, Guerrero, Josep M., Quintero, Juan Carlos Vasquez, Savaghebi, Mehdi   +3 more
core   +2 more sources

Optimal Coordination of DOC Relays Incorporated into a Distributed Generation-Based Micro-Grid Using a Meta-Heuristic MVO Algorithm

Energies, 2019
Distributed, generation-based micro-grids are increasingly being used in the build-up of the modern power system. However, the protection of these micro-grids has many challenges.
Mahmoud Abdelsalam, Hatem Y. Diab
doaj   +1 more source

Adaptive directional overcurrent relay coordination using ant colony optimisation

IET Generation, Transmission & Distribution, 2015
The coordination of directional overcurrent relays is most commonly studied based on a fixed network topology within an interconnected power system. Due to its complexity and non‐linearity, the relay coordination is formulated as an optimisation problem.
Meng Yen Shih, Carlos Alberto Castillo Salazar, Arturo Conde Enríquez   +2 more
openaire   +1 more source

Experience from research into low voltage DC distribution system protection : recommendations for protecting hybrid HV DC-AC grids [PDF]

, 2015
This paper presents experience and outcomes of a research project concerned with protecting an LVDC “last mile” distribution network. The paper introduces the following contributions that reduces the risks associated with shifting from AC to DC for LV ...
Booth, Campbell, Burt, Graeme, Emhemed, Abdullah   +2 more
core  

Optimal Coordination of Directional Overcurrent Relays (DOCR) Using Cheetah Optimizer

Tikrit Journal of Engineering Sciences
This paper suggests a nature-inspired optimization technique, the Cheetah Optimizer (CO), to achieve optimal Directional Overcurrent Relays (DOCRs) coordination.
Wisam Najm Al-Din Abed
doaj   +1 more source