Results 81 to 90 of about 1,625 (202)

Robust coordination of directional overcurrent relays using a matheuristic algorithm

IET Generation, Transmission & Distribution, 2017
Directional overcurrent relays are often used in the protection of electrical power transmission and distribution systems. These devices are installed along the network, and they must be coordinated to operate as fast as possible and in the adequate sequence.
Mateus H. Costa, Rodney R. Saldanha, Martin G. Ravetti, Eduardo G. Carrano   +3 more
openaire   +1 more source

High‐speed algorithm for fault detection and location in DC microgrids based on a novel time–frequency analysis

IET Generation, Transmission &Distribution, Volume 18, Issue 24, Page 4259-4278, December 2024.
The proposed protection algorithm detects and locates DC faults with high resistances, utilizing fault detection and location, employing the high‐order synchrosqueezing transform that determines magnitudes and polarities of traveling waves, discriminates between forward DC faults and backward ones, and distinguishes between internal DC faults and ...
Amir Hossein Poursaeed, Farhad Namdari
wiley   +1 more source

Pemodelan dan Simulasi Sistem Proteksi Mikrogrid [PDF]

, 2016
Mikrogrid mengintegrasi sumber energi terdistribusi untuk menyediakan sistem yang handal dan ramah lingkungan. Akibat adanya generator dan PV pada semua level sistem mikrogrid dan 3 konfigurasi sistem yang berbeda, yaitu hanya terhubung grid, terhubung ...
Soeprijanto, A. (Adi), Trisnasari, C. T. (Christina), Wibowo, R. S. (Rony)   +2 more
core  

Optimal coordination of directional overcurrent relays: A fast and precise quadratically constrained quadratic programming solution methodology

IET Generation, Transmission &Distribution, Volume 18, Issue 24, Page 4342-4357, December 2024.
The paper focuses on the non‐linear objective function in the optimal coordination of directional overcurrent relays. A quadratic Taylor series expansion is used to simplify the problem into a quadratically constrained quadratic programming problem. The quadratic constraints are transformed into second‐order cone constraints for compatibility with the ...
Amir Hossein Poursaeed, Meysam Doostizadeh, Sina Hossein Beigi Fard, Amir Hossein Baharvand, Farhad Namdari   +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

Enhancing distance protection in transmission grids with high penetration of renewable energy sources through cooperative protection

IET Generation, Transmission &Distribution, Volume 18, Issue 21, Page 3462-3475, November 2024.
This article introduces innovative protection strategies, including cooperative protection. It delves into the challenges and solutions of safeguarding power transmission grids amidst a significant shift towards renewable energy sources (RES), such as wind and solar power, as well as inverter‐based resources (IBRs). By incorporating virtual leaders and
Sayed Mahdi Koloushani, Seyed Abbas Taher   +1 more
wiley   +1 more source

Optimal adaptive coordination of overcurrent relays in power systems protection using a new hybrid metaheuristic algorithm

IET Renewable Power Generation, Volume 18, Issue 12, Page 1948-1971, 7 September 2024.
The salient contributions of this paper are underscored as follows: Developing a robust adaptive mechanism for the adjustment of protective overcurrent relays in response to diurnal variations in the electrical load of power systems; Adaptive optimization of the operation time of the relays in the event of a fault along with the appropriate selection ...
Samira Sadeghi, Ali Hesami Naghshbandy, Parham Moradi, Abed Bagheri   +3 more
wiley   +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

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