Results 41 to 50 of about 90 (80)

Implementation of Static Line Voltage Stability Indices for Improved Static Voltage Stability Margin

Journal of Electrical and Computer Engineering, 2019
Nowadays, the changes of economic, environment, and regulations are forcing the electric utilities to operate systems at maximum capacity. Therefore, the operation and control of power system to improve the system stability has been receiving a great ...
Natakorn Thasnas, Apirat Siritaratiwat
doaj   +1 more source

An Improved Algorithm for Optimal Load Shedding in Power Systems

Energies, 2018
A blackout is usually the result of load increasing beyond the transmission capacity of the power system. A collapsing system enters a contingency state before the blackout.
Raja Masood Larik, Mohd Wazir Mustafain, Muhammad Naveed Aman, Touqeer Ahmed Jumani, Suhaib Sajid, Manoj Kumar Panjwani   +5 more
doaj   +1 more source

Effect of ambient temperature variations on estimation of proximity of the voltage collapse point

IET Generation, Transmission & Distribution, 2020
Due to deforestation, greenhouse gases and increasing air conditioner systems, the temperatures are changing drastically and the effects are prominent in summer and winter seasons.
Trinadha Burle, V V S Bhaskara Reddy Chintapalli   +1 more
doaj   +1 more source

Prediction of voltage stability index in buses without measurement in distribution systems

IET Generation, Transmission &Distribution, Volume 18, Issue 14, Page 2435-2451, July 2024.
In this article, a new practical method called VFWMB is introduced for predicting voltage stability in the distribution system (DS). To implement this method, a practical algorithm is required to locate the measurements labelled seeking observation zone with the weight least square (SOZWLS).
Mohammad Hasan Hemmatpour
wiley   +1 more source

Persistence-Based Identification of Structurally Critical Transmission Lines Under N − 1 Contingencies

Energies
Voltage stability assessment under transmission contingencies is traditionally performed using severity-based indices evaluated on isolated outage scenarios.
Manuel Jaramillo, Diego Carrión, Carlos Barrera-Singaña, Luis Tipán, Filippos Perdikos, Jorge González   +5 more
doaj   +1 more source

Optimizing Critical Overloaded Power Transmission Lines with a Novel Unified SVC Deployment Approach Based on FVSI Analysis

Energies
This paper proposes a novel methodology to improve stability in a transmission system under critical conditions of operation when additional loads that take the system to the verge of stability are placed in weak bus bars according to the fast voltage ...
Manuel Dario Jaramillo, Diego Francisco Carrión   +1 more
doaj   +1 more source

Multi-Objective Optimization of Mobile Battery Energy Storage and Dynamic Feeder Reconfiguration for Enhanced Voltage Profiles in Active Distribution Systems

Energies
Active distribution systems (ADS) are increasingly strained by rising energy demand and the widespread deployment of distributed energy resources (DERs) and electric vehicle charging stations (EVCS), which intensify voltage deviations, power losses, and ...
Phuwanat Marksan, Krittidet Buayai, Ritthichai Ratchapan, Wutthichai Sa-nga-ngam, Krischonme Bhumkittipich, Kaan Kerdchuen, Ingo Stadler, Supapradit Marsong, Yuttana Kongjeen   +8 more
doaj   +1 more source

Hybrid Metaheuristic-Based Probabilistic Planning of Weak Power Grids with Renewable Generation and Hydrogen Energy Storage

Energies
The large-scale integration of wind turbine generators (WTGs) and photovoltaic (PV) generation increases operational uncertainty and can exacerbate stability limitations in weak transmission networks, motivating the use of green hydrogen energy storage ...
Ayman Hussein Badawi, Mohamed M. Zakaria Moustafa, Mostafa S. Hamad, Ayman Samy Abdel-Khalik, Ragi A. R. Hamdy   +4 more
doaj   +1 more source

Unified Loadability Quality Factor (ULQF): A bounded and interpretable voltage stability index

International Journal of Electrical Power & Energy Systems
Voltage stability assessment remains a critical challenge in evolving power networks, which are increasingly influenced by load variability, renewable energy integration, and distributed energy resources.
Manuel Jaramillo, Diego Carrión, Filippos Perdikos   +2 more
doaj   +1 more source

Avaliação da influência de substâncias fenólicas e carotenoides na anomalia do epicarpo da goiaba, "anelamento" Phenolic compounds and carotenoids amounts on guava epicarp injury, 'girdling'

Revista Brasileira de Fruticultura, 2011
A anomalia do epicarpo da goiaba, comumente relatada por agricultores e técnicos como o "anelamento juvenil da goiaba", tem causado preocupação devido à desinformação sobre o assunto.
Taiji Watanabe, Danilo Eduardo Rozane, William Natale, Claudia Maria Furlan   +3 more
doaj