Results 61 to 70 of about 259,512 (191)

Voltage Stability Index Calculation by Hybrid State Estimation Based on Multi Objective Optimal Phasor Measurement Unit Placement

open access: yesEnergies, 2019
Operation of a power system close to the voltage stability limit due to increasing of load demand and limited power sources may result in disastrous economic loss with voltage collapse of the entire power system.
Yoshiaki Matsukawa   +3 more
doaj   +1 more source

Multi-Objective Genetic Algorithm for voltage stability enhancement using rescheduling and FACTS devices

open access: yesAin Shams Engineering Journal, 2014
This paper presents the application of Multi-Objective Genetic Algorithm to solve the Voltage Stability Constrained Optimal Power Flow (VSCOPF) problem.
J. Preetha Roselyn   +2 more
doaj   +1 more source

Current-voltage characteristic and stability in resonant-tunneling n-doped semiconductor superlattices

open access: yes, 1997
We review the occurrence of electric-field domains in doped superlattices within a discrete drift model. A complete analysis of the construction and stability of stationary field profiles having two domains is carried out.
%L. Esaki   +34 more
core   +1 more source

Voltage stability index-based reactive power compensation scheme

open access: yesInternational Journal of Electrical Power & Energy Systems, 2015
Abstract Reports of various committees set up to review the 2003 North American major power outages pointed out that a major exacerbating factor has been lack of situational awareness by power system operators. To improve reactive power compensation and contribute to the mitigation of power outages associated with the present near-limit operated ...
Damian O. Dike, Satish M. Mahajan
openaire   +1 more source

Long-Term Voltage Stability Assessment of an Integrated Transmission Distribution System

open access: yes, 2017
Long-term voltage stability assessment (VSA) of independent transmission (T-VSA) and distribution (D-VSA)systems have been studied since long to estimate load margins. However, their impacts on each other have been neglected due to simplified assumptions
Ajjarapu, Venkataramana, Singhal, Ankit
core   +1 more source

New Performance Indices for Voltage Stability Analysis in a Power System

open access: yesEnergies, 2017
The frequent occurrence of voltage instability in a modern power system is alarming and thus, has been of great concern to power system utilities. In this paper, a new performance index based on the power flow solutions for voltage stability assessment ...
Isaiah Adebayo, Yanxia Sun
doaj   +1 more source

Comparative analysis of existing models for power-grid synchronization

open access: yes, 2015
The dynamics of power-grid networks is becoming an increasingly active area of research within the physics and network science communities. The results from such studies are typically insightful and illustrative, but are often based on simplifying ...
Motter, Adilson E., Nishikawa, Takashi
core   +1 more source

Two combined methods for the global solution of implicit semilinear differential equations with the use of spectral projectors and Taylor expansions

open access: yes, 2019
Two combined numerical methods for solving semilinear differential-algebraic equations (DAEs) are obtained and their convergence is proved. The comparative analysis of these methods is carried out and conclusions about the effectiveness of their ...
Filipkovska, M. S.
core   +1 more source

An improved voltage stability index and its application

open access: yesInternational Journal of Electrical Power & Energy Systems, 2004
Abstract After some damaging blackouts, voltage stability and collapse have become worldwide concerned problems. In this paper, we focus on the aspect of voltage stability. An improved voltage stability index named LI is presented, which can give an accurate indication to power system voltage instability with considering the influence of the load ...
null Jia Hongjie   +2 more
openaire   +1 more source

New techniques incorporating computational intelligence based for voltage stability evaluation and improvement in power system / Nur Fadilah Ab Aziz [PDF]

open access: yes, 2014
Recently, there are still many cases of voltage collapse incidents occur all around the world. This is due to the reason that most power systems today are being operated very close to their stability limits because of the exponentially growing demands ...
Ab Aziz, Nur Fadilah
core  

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