Power losses on overhead lines under various loading regimes and weather conditions

2017 ◽  
Author(s):  
Ileana Baran ◽  
Marian Costea ◽  
Tudor Leonida
Keyword(s):  
Weather Conditions ◽  
Power Losses ◽  
Overhead Lines

Evaluation of Joule Power Losses Reduction in Overhead Lines with Innovative Conductors

2018 ◽  
Author(s):  
Roberto Benato ◽  
Roberto Caldon ◽  
Massimiliano Coppo ◽  
Sebastian Dambone Sessa ◽  
Giovanni Rinzo ◽  
...  
Keyword(s):  
Power Losses ◽  
Overhead Lines

A Discussion on recent advances in heavy electrical plant - Mechanical and aerodynamic problems associated with future overhead lines

1973 ◽  
Vol 275 (1248) ◽  
pp. 181-188
Keyword(s):  
Research Work ◽  
Weather Conditions ◽  
Meteorological Conditions ◽  
Relevant Research ◽  
Overhead Lines ◽  
Recent Advances ◽  
Aeolian Vibration ◽  
The Future

Overhead lines operate under all weather conditions and, consequently, are subjected to various forms of aerodynamic excitation which can cause three types of oscillation to occur, namely aeolian vibration, subconductor oscillation and full-span galloping. The meteorological conditions, associated with each type of oscillation, are described and the attendant problems discussed. Solutions which have been developed to overcome these problems are described and the relevant research work is outlined. It will be shown how this work could affect the future designs of overhead lines at existing voltage levels. Finally, the problems associated with possible multi-subconductor u.h.v. lines are considered and the influences which these problems may have on the design of such lines discussed.

scholarly journals The application of the CLONALG algorithm in the process of optimal operation control of hybrid AC/DC low voltage microgrid

2019 ◽  
Vol 84 ◽  
pp. 02011
Author(s):  
Łukasz Rokicki
Keyword(s):  
Low Voltage ◽  
Weather Conditions ◽  
Optimization Methods ◽  
Optimal Operation ◽  
Power Losses ◽  
Artificial Immune ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Operation Control ◽  
Power And Energy

The issue of optimal operation control of microgrids is a very important problem. As a result of changing weather conditions and the demand for the power of individual consumers, generation units and energy storage devices must constantly adjust their operation states. The optimization of the microgrid operation states can simultaneously provide the required level of power and energy and, for example, minimization of power losses or costs associated with the operation of this type of system. Among many available optimization methods, author of a paper decided to test the CLONALG algorithm, which is an implementation of artificial immune system. The article will presents the characteristics of selected CLONALG algorithm, and the description of the test microgrid together with the considered optimization criteria and constraints. The presentation and analysis of the obtained results from optimization calculations will be the main part of the paper. At the end of the paper observations and conclusion will be presented.

Power losses in electrical networks depending on weather conditions

2005 ◽  
Vol 39 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Yu. S. Zhelezko ◽  
V. A. Kostyushko ◽  
S. V. Krylov ◽  
E. P. Nikiforov ◽  
O. V. Savchenko ◽  
...  
Keyword(s):  
Weather Conditions ◽  
Electrical Networks ◽  
Power Losses

scholarly journals Delamination-and Electromigration-Related Failures in Solar Panels—A Review

2021 ◽  
Vol 13 (12) ◽  
pp. 6882
Author(s):  
Abdulwahab A. Q. Hasan ◽  
Ammar Ahmed Alkahtani ◽  
Seyed Ahmad Shahahmadi ◽  
Mohammad Nur E. Alam ◽  
Mohammad Aminul Islam ◽  
...  
Keyword(s):  
Failure Modes ◽  
Weather Conditions ◽  
Solar Panels ◽  
Power Losses ◽  
Pv Module ◽  
Humidity Change ◽  
Aging Test ◽  
Pv Modules ◽  
Harsh Climate ◽  
Silicon Based

The reliability of photovoltaic (PV) modules operating under various weather conditions attracts the manufacturer’s concern since several studies reveal a degradation rate higher than 0.8% per year for the silicon-based technology and reached up to 2.76% per year in a harsh climate. The lifetime of the PV modules is decreased because of numerous degradation modes. Electromigration and delamination are two failure modes that play a significant role in PV modules’ output power losses. The correlations of these two phenomena are not sufficiently explained and understood like other failures such as corrosion and potential-induced degradation. Therefore, in this review, we attempt to elaborate on the correlation and the influence of delamination and electromigration on PV module components such as metallization and organic materials to ensure the reliability of the PV modules. Moreover, the effects, causes, and the sites that tend to face these failures, particularly the silicon solar cells, are explained in detail. Elsewhere, the factors of aging vary as the temperature and humidity change from one country to another. Hence, accelerated tests and the standards used to perform the aging test for PV modules have been covered in this review.

A model for calculating the temperature of aluminium particles ejected from overhead low-voltage lines owing to a short-circuit

2009 ◽  
Vol 18 (6) ◽  
pp. 722 ◽  
Author(s):  
E. G. Psarros ◽  
A. D. Polykrati ◽  
C. G. Karagiannopoulos ◽  
P. D. Bourkas
Keyword(s):  
Mathematical Model ◽  
Molten Metal ◽  
High Voltage ◽  
Temperature Rise ◽  
Low Voltage ◽  
Short Circuit ◽  
Weather Conditions ◽  
Metal Particles ◽  
Overhead Lines ◽  
Protection Systems

Wildfires, which are uncontrolled fires spreading readily over vast areas, are usually the result of human negligence, arson or lightning. There are cases of fires close to electrical distribution lines for which the network has been blamed. In the present paper, the risk of a wildfire breaking out owing to the temperature of molten metal particles that are possibly created on bare conductors of low-voltage networks in short-circuit faults (unless they are interrupted by the protection systems) is examined. Thus, a mathematical model is proposed for the estimated temperature rise of those molten metal particles ejected from bare conductors of low-voltage overhead lines. Moreover, this model can be applied to medium- or high-voltage networks. The model takes into account the weather conditions and particles’ height above the ground. Further, an arithmetic example for an incandescent particle ejected from aluminium conductors of a low-voltage network is given. According to this example, there is no risk of dead leaves or wood catching fire owing to this particle.

Sign in / Sign up

Export Citation Format

Share Document