Results 61 to 70 of about 2,500 (192)

Considering Pilot Protection in the Optimal Coordination of Distance and Directional Overcurrent Relays

Iranian Journal of Electrical and Electronic Engineering, 2015
The aim of the relay coordination is that protection systems detect and isolate the faulted part as fast and selective as possible. On the other hand, in order to reduce the fault clearing time, distance protection relays are usually equipped with pilot ...
Y. Damchi, J. Sadeh, H. Rajabi Mashhadi
doaj  

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

Modified Swarm-Based Artificial Intelligence Optimization for Optimal Coordination of Directional Overcurrent Relays in Power System

IEEE Access
The coordination of directional overcurrent relays (DOCRs) plays a critical role in ensuring the reliability and robustness of modern electrical power protection systems.
Abdul Wadood, Hani Albalawi, Aadel Mohammed Alatwi, Herie Park   +3 more
doaj   +1 more source

Research on the Adaptive Protection Method for Distribution Networks With Inverter‐Type Distributed Power Supplies: Based on Short‐Circuit Impedance Calculation

Engineering Reports, Volume 7, Issue 4, April 2025.
If the linear node voltage equation set obtained from the faulty composite sequential network is solved directly by linear transformation, it is not possible to accurately calculate and obtain the fault current and the voltage at the merging point of IIDG.
Zhuoran Song, Zhanjun Li, Yongji Tong, Wenlei Dou, Hongbo Zhu, Tao Jiang   +5 more
wiley   +1 more source

Optimal Coordination of Distance and Directional Overcurrent Relays Considering Different Network Topologies

Iranian Journal of Electrical and Electronic Engineering, 2015
Most studies in relay coordination have focused solely on coordination of overcurrent relays while distance relays are used as the main protection of transmission lines.
Y. Damchi, J. Sadeh, H. Rajabi Mashhadi
doaj  

Advanced voltage relay design for distance relay coordination in power networks equipped with low‐inertia areas

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
DR and OCR mis‐coordination challenges under the impact of DG. Abstract In modern power systems with high levels of distributed generation (DG), traditional protection schemes face challenges in ensuring reliable and efficient fault detection due to the complexities introduced by DG, particularly low‐inertia sources such as wind power.
Feras Alasali, Naser El‐Naily, Haytham Y. Mustafa, Hassen Loukil, Saad M. Saad, Abdelaziz Salah Saidi, William Holderbaum   +6 more
wiley   +1 more source

Assessment of an Overcurrent Protection Strategy Based on Thermal Stress Curves in Distribution Networks Under Reconfiguration Scenarios

IEEE Access
Network reconfiguration enables the restoration of power supply in interrupted areas after faults or planned maintenance events. However, changes in network topology can often lead to alteration in the direction and magnitude of fault currents ...
Michele Rojnic, Rene Prenc, Vedran Kirincic, Milos Bekovic   +3 more
doaj   +1 more source

MMC‐HVDC Control Parameter Selection for Grid Code Compliance and Improved System Protection Performance Under AC‐Side Faults

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
This paper explores the control parameter selection in modular multilevel converter based high voltage direct current systems to enhance distance protection performance while maintaining stability and grid code compliance under varying grid conditions.
Xiaoxiao Liu, Paul Judge, Geraint Chaffey, Willem Leterme, Dirk Van Hertem   +4 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