Results 51 to 60 of about 1,041,598 (189)

Short‐Circuit Current Analysis of Grid‐Connected Inverters: An Analytical Approach Using Hardware Natural Response and Control Superposition

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This paper proposes a closed‐form analytical framework predicting the sub‐cycle transient peak currents of grid‐following and grid‐forming inverters during short‐circuit faults. The method uniquely decouples the fault current into a hardware natural response and a control‐commanded response, enabling rapid estimation of instantaneous initial peaks ...
Ziqian Zhang, Robert Schuerhuber
wiley   +1 more source

Communication-less adaptive directional overcurrent protection strategy considering islanded mode detection in active distribution networks

Results in Engineering, 2023
The integration of distributed energy resources (DERs) in electric distribution networks originates the Active Distribution Networks (ADNs). The presence of DERs introduces challenges to conventional protection schemes due to bidirectional power flows ...
J. Orozco-Álvarez, A. Herrera-Orozco, J. Mora-Flórez   +2 more
doaj   +1 more source

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

Hybrid Protection Scheme Based Optimal Overcurrent Relay Coordination Strategy for RE Integrated Power Distribution Grid

Energies, 2021
A directional overcurrent relay is commonly used to protect the power distribution networks of a distributed system. The selection of the appropriate settings for the relays is an important component of the protection strategies used to isolate the ...
Aayush Shrivastava, Abhishek Sharma, Manjaree Pandit, Vibhu Jately, Brian Azzopardi   +4 more
doaj   +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

Political Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays

2020 IEEE Electric Power and Energy Conference (EPEC), 2020
In this paper, the political optimization (PO) algorithm is applied to coordinate the directional overcurrent relays (DOCRs). Optimal coordination of DOCRs that used for protecting electrical networks is a nonlinear constrained optimization problem. The PO algorithm is duplicating five main phases of politics from the population which is divided into ...
Abdelhamid M., Kamel S., Mohamed M.A., Aljohani M., Rahmann C., Mosaad M.I.   +5 more
openaire   +2 more sources

Optimal coordination of overcurrent relays for microgrid operation using JAYA algorithm

e-Prime: Advances in Electrical Engineering, Electronics and Energy
In modern microgrids, relay coordination is a very tedious task because of the variation in magnitude and direction of fault current. The change in fault current is diverse for inverter interfaced DGs (IIDGs) and synchronous-based DGs (SBDGs) The ...
Naveen Kumar, Dinesh Kumar Jain
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

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

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