Results 11 to 20 of about 141 (107)

Optimasi Time Dial Setting (TDS) Relay Arus Lebih Menggunakan Adaptive Modified Firefly Algorithm Pada Sistem Kelistrikan PT. Pupuk Kalimantan Timur

Jurnal Teknik ITS, 2016
Penggunaan relay arus lebih (over current relay) pada industri memerlukan pengaturan beberapa parameter seperti arus pickup (Ip), time dial setting (TDS), serta waktu operasi (top). Dalam standard acuan dicantumkan batasan-batasan dan formulasi dalam menentukan parameter tersebut.
Vincentius Raki Mahindhara, Margo Pujiantara   +1 more
openaire   +3 more sources

A probabilistic approach for optimal operation of wind‐integrated power systems including UPFC

IET Renewable Power Generation, Volume 17, Issue 3, Page 706-724, 24 February 2023., 2023
Abstract The optimal location and setting of the unified power flow controller (UPFC) along with power plant generators' output parameters to enhance power systems reliability in the presence of uncertain variables are determined in this paper. For this purpose, the expected power not served (EPNS) is used as a reliability index based on the total ...
Saeed Rezaeian‐Marjani, Sajjad Miralizadeh Jalalat, Behrouz Tousi, Sadjad Galvani, Vahid Talavat   +4 more
wiley   +1 more source

An Improved Optimal Solution for the Directional Overcurrent Relays Coordination Using Hybridized Whale Optimization Algorithm in Complex Power Systems

IEEE Access, 2019
The directional overcurrent relays (DOCRs) coordination is a useful tool in guaranteeing the safe protection of the power system by the proper coordination of primary and backup protection systems. The optimization model of this problem is non-linear and
Tahir Khurshaid, Abdul Wadood, Saeid Gholami Farkoush, Jiangtao Yu, Chang-Hwan Kim, Sang-Bong Rhee   +5 more
doaj   +1 more source

Low Computational Burden Adaptive Overcurrent Protection for Active Distribution Networks

International Transactions on Electrical Energy Systems, Volume 2023, Issue 1, 2023., 2023
Conventional distribution networks have evolved into active distribution networks due to the high penetration of distributed energy resources. These new networks have several protection issues; some are related to the high fault and load current variations due to the various operating conditions.
B. Grisales-Soto, S. Pérez-Londoño, J. Mora-Flórez, Arvind R. Singh   +3 more
wiley   +1 more source

Optimal adaptive protection of smart grids using high‐set relays and smart selection of relay tripping characteristics considering different network configurations and operation modes

IET Generation, Transmission &Distribution, Volume 16, Issue 24, Page 5084-5116, December 2022., 2022
Abstract Much attention has been paid to optimizing smart grids (SGs) and microgrids (MGs) protection schemes. The SGs’ operation in different operating modes (especially grid‐connected and islanded conditions) and various system configurations (such as the outage of each of the distribution generations) adversely influence the protection system.
Amir Hossein Ataee‐Kachoee, Hamed Hashemi‐Dezaki, Abbas Ketabi   +2 more
wiley   +1 more source

Hybrid mixed-integer non-linear programming approach for directional over-current relay coordination

The Journal of Engineering, 2019
This article proposes the optimal coordination problem of protective relays within a hybrid optimisation framework which is presented based on integer coded genetic algorithm (ICGA) and non-linear programming (NLP).
Mohammad Sadegh Javadi, Ali Esmaeel Nezhad, Ali Esmaeel Nezhad, Amjad Anvari-Moghadam, Josep M. Guerrero   +4 more
doaj   +1 more source

Optimal communication‐aided protection of meshed smart grids considering stability constraints of distributed generations incorporating optimal selection of relay characteristics

IET Renewable Power Generation, Volume 16, Issue 11, Page 2313-2337, 17 August 2022., 2022
Abstract The optimized protective systems for smart grids and microgrids have received much attention in recent years. However, besides other selectivity constraints, less attention has been paid to synchronous generators’ stability concerns. The stability challenges are intensified in meshed grids compared to radial configurations.
Hamidreza Aghaei, Hamed Hashemi‐Dezaki
wiley   +1 more source

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

Energies, 2019
In power systems protection, the optimal coordination of directional overcurrent relays (DOCRs) is of paramount importance. The coordination of DOCRs in a multi-loop power system is formulated as an optimization problem.
Abdul Wadood, Tahir Khurshaid, Saeid Gholami Farkoush, Jiangtao Yu, Chang-Hwan Kim, Sang-Bong Rhee   +5 more
doaj   +1 more source

Hybridized Symbiotic Organism Search Algorithm for the Optimal Operation of Directional Overcurrent Relays

Complexity, 2018
This paper presents the solution of directional overcurrent relay (DOCR) problems using Simulated Annealing based Symbiotic Organism Search (SASOS). The objective function of the problem is to minimize the sum of the operating times of all primary relays.
Muhammad Sulaiman, Ashfaq Ahmad, Asfandyar Khan, Shakoor Muhammad   +3 more
doaj   +1 more source

Oppositional Jaya Algorithm With Distance-Adaptive Coefficient in Solving Directional Over Current Relays Coordination Problem

IEEE Access, 2019
The model of directional over current relays (DOCRs) coordination is considered as an optimization problem. It is generally formulated as linear programming (LP), non-linear programming (NLP) and mixed integer non-linear programming (MINLP), according to
Jiangtao Yu, Chang-Hwan Kim, Sang-Bong Rhee   +2 more
doaj   +1 more source