Results 21 to 30 of about 77 (68)

Transient stability enhancement in multiple‐microgrid networks by cloud energy storage system alongside considering protection system limitations

IET Generation, Transmission &Distribution, Volume 17, Issue 8, Page 1816-1826, April 2023., 2023
Abstract The gas turbine synchronous generators (GTSGs) are widely deployed as distributed generations (DGs) in countries with massive natural gas production owing to their low prices. However, due to the low inertia time constants of these synchronous‐based DGs, they are more susceptible to power grid faults which stands as a transient stability issue
Hossein Ebrahimi, Amin Yazdaninejadi, Sajjad Golshannavaz   +2 more
wiley   +1 more source

A novel cyber‐attack modelling and detection in overcurrent protection relays based on wavelet signature analysis

IET Generation, Transmission &Distribution, Volume 17, Issue 7, Page 1585-1600, April 2023., 2023
The contribution of this research is to simplify modelling of three common types of cyber‐attacks and its detection method. Finally a new index has been designed for the detection of different cyber‐attacks that employs wavelet analysis of the substation currents and energy of a signal which has been called cyber‐attack detection index (CADI ...
Mohammad Yousefi kia, Mohsen Saniei, Seyyed Ghodratollah Seifossadat   +2 more
wiley   +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

Implementation of Optimal Protection Coordination for Microgrids with Distributed Generations Using Quaternary Protection Scheme

Journal of Electrical and Computer Engineering, 2020
The flexible operation of microgrids, along with the availability of distributed generation (DG) units, causes a variety of changes in short-circuit current levels, magnitudes, and directions, which has undesirable effects on the operation of protection ...
Panida Thararak, Peerapol Jirapong
doaj   +1 more source

Differential Evolution with a Level‐Based Learning Strategy for Multimodal Optimization

International Journal of Intelligent Systems, Volume 2023, Issue 1, 2023., 2023
Multimodal optimization aims at efficiently finding multiple optimal solutions of a problem. Owing to the population‐based search mechanism, evolutionary algorithms (EAs) are becoming increasingly popular in solving multimodal optimization problems (MOPs).
Yuhui Zhang, Wenhong Wei, Tiezhu Zhao, Zijia Wang, Fabio Caraffini   +4 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

Adaptive real-time protection scheme for distribution networks with high penetration levels of renewable energy resources

Ain Shams Engineering Journal, 2023
The increasing demands of electrical power have imposed a necessity to integrate renewable energy power sources (REPS) into electrical power networks. The presence of REPS within electrical distribution networks mandated an update in the settings of the ...
Fady Wadie, Ebthal Abdulgawad, A. Mousa Abd-Allah   +2 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

Optimal Coordination of Distance and Two-Level Directional Overcurrent Relays for Renewable Energy-Integrated Power Networks Using Enhanced Red-Tailed Hawk Algorithm

Applied Sciences
Optimal coordination of distance and directional overcurrent relays (DR–DOCR) aims to achieve a fast, selective, and reliable protection scheme for transmission and sub-transmission systems.
Birsen Boylu Ayvaz, Zafer Dogan
doaj   +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