Results 61 to 70 of about 235,466 (206)

Physics‐Informed Graph Reinforcement Learning for Hosting Capacity Maximization in Distribution Networks

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This paper proposes a physics‐informed graph reinforcement learning (PI‐GRL) framework that combines graph neural networks (GNNs) with deep reinforcement learning and physics‐based regularization for unified HC maximization. The distribution network is modelled as a heterogeneous graph with typed nodes and edges, processed by a multi‐relational GNN ...
Aamir Nawaz, Aftab Ahmed Almani, Rizwan Ul Hassan, Zahid Javid, William Holderbaum   +4 more
wiley   +1 more source

Optimal Coordination of Overcurrent Directional and Distance Relays in Meshed Networks Using Genetic Algorithm

, 2015
Protection of transmission lines is essential to ensure a correct operation of power systems. In this paper a pilot protection scheme, known as permissive overreaching transfer trip, is used.
Mantovani, Jose Roberto Sanches, Marcolino, Matheus Henrique [UNESP], Leite, Jonatas Boas, Mantovani, Jose Roberto Sanches [UNESP], Leite, Jonatas Boas [UNESP], Marcolino, Matheus Henrique   +5 more
core   +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

A novel scheme for current-only directional overcurrent relay

International Journal of Electrical Power & Energy Systems, 2016
Abstract Overcurrent relays are widely used as main protection in sub-transmission and distribution systems. In mesh and multi-source networks, application of directional relay is unavoidable. Traditional directional overcurrent relays use the reference voltage phasor as the polarizing quantity to estimate the direction of the fault.
Morteza Nojavan, Heresh Seyedi, Mehdi Mehdinejad   +2 more
openaire   +1 more source

An Intelligent Machine Learning‐Based Algorithm to Adapt the Behaviour of Differential Protection During Sub‐Synchronous Resonance in Smart Grids

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
The smart grid requires self‐healing protection; therefore, this paper proposes an intelligent machine learning‐based algorithm capable of adapting the behaviour of transformer differential protection during SSR. ABSTRACT The smart grid incorporates renewable energy generation sources, such as doubly fed induction generators in wind farms and ...
Salman Rezaei
wiley   +1 more source

High-Frequency Behavior of Residual Current Devices [PDF]

, 2012
The purpose of this paper is to analyze the behavior of residual current devices at frequencies higher than the rated one. Many experiments are carried out by measuring tripping current and time of devices of different typology, produced by different ...
Freschi, Fabio
core   +1 more source

A Novel Protection Scheme for Solar Photovoltaic Generator Connected Networks Using Hybrid Harmony Search Algorithm-Bollinger Bands Approach

Energies, 2020
This paper introduces a new protection system for solar photovoltaic generator (SPVG)-connected networks. The system is a combination of voltage-restrained overcurrent relays (VROCRs) and directional overcurrent relays (DOCRs).
Vipul N. Rajput, Kartik S. Pandya, Junhee Hong, Zong Woo Geem   +3 more
doaj   +1 more source

Advanced Hosting Capacity Assessment in Distribution Systems Using a Centralised HIL‐Based Setup

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
The paper proposes a two‐stage framework for assessing distributed energy resource (DER) hosting capacity that combines an initial optimisation‐based estimate with real‐time validation using a centralised IEC 61850–compliant Hardware‐in‐the‐Loop (HIL) platform and a digital twin of the IEEE 33‐bus system.
Meysam Pashaei, Seyed Farhad Zandrazavi, Kimmo Kauhaniemi, Hannu Laaksonen   +3 more
wiley   +1 more source

A q component‐based adaptive protection coordination optimisation using overcurrent relays in coordination with fuses for hybrid microgrid

IET Generation, Transmission & Distribution, 2021
In a hybrid microgrid, the overcurrent relays (OCRs) must sense the changes in the fault currents while the microgrid switches from the grid‐connected to the islanded mode of operation. Further, for the different types of distributed generator (DG), such
Manjeet Singh
doaj   +1 more source

Review of Fault Detection Methods in Microgrids: From Conventional to Innovative Perspective

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
The increasing global energy demand and the limitations of conventional resources have intensified the need for flexible, reliable, and sustainable energy solutions, highlighting the importance of microgrids. This study presents a comprehensive review of fault detection and management methods in microgrids, comparing traditional, signal processing ...
Mehmet Hasir, Alper Nabi Akpolat, Kürşat Ayan   +2 more
wiley   +1 more source