High Voltage Power Line Carrier. Obsolete Technology or Inherent part of the Power Transmission Electrical Grid?

Author(s):  
Anton G. Merkulov
2020 ◽  
Vol 17 ◽  
pp. 105-108
Author(s):  
Marko Kaasik ◽  
Sander Mirme

Abstract. The electric power that can be transmitted via high-voltage transmission lines is limited by the Joule heating of the conductors. In the case of coastal wind farms, the wind that produces power simultaneously contributes to the cooling of high-voltage overhead conductors. Ideally this would allow for increased power transmission or decreased dimensions and cost of the conductor wires. In this study we investigate how well the wind speed in coastal wind farms is correlated with wind along a 75 km long 330 kW power line towards inland. It is found that correlations between wind speed in coastal wind farms at turbine height and conductor-level (10 m) are remarkably lower (R=0.39–0.64) than between wind farms at distances up to 100 km from each other (R=0.76–0.97). Dense mixed forest surrounding the power line reduces both local wind speed and the correlations with coastal higher-level wind, thus making the cooling effect less reliable.


2015 ◽  
Vol 49 (1) ◽  
pp. 87-94 ◽  
Author(s):  
E. V. Prokopenko

Abstract The fauna and structure of herbdwelling spider assemblages in mesophitic meadow under the high voltage power line near Irliava village (Uzhhorod District, Transcarpathian Region) were analyzed on the material collected by sweep netting. Th e counts were held at five sampling sites: 1) under the wires; 2) at a distance of 50 m; 3) 100 m; 4) 150 m; 5) 200 m. In total, 41 spider species of 14 families were collected. Erigonoplus globipes (L. Koch, 1872) and Hylyphantes nigritus (Simon, 1881) were recorded in the Carpathians for the first time. Th e reduction of total number and species richness of spiders was registered as the approaching to the high voltage power line. Except single finds, no species avoided the wire nearest sites (0-50 m). Abundance of most spider families (except Araneidae) was not significantly influenced by distance from the high voltage power line.


2021 ◽  
Vol 1 (1) ◽  
pp. 4-12
Author(s):  
Andrey N. BELYAEV ◽  
◽  
Oleg O. PERESLYTSKIKH ◽  

Steady-state operation modes and stability of a long-distance extra-high voltage transmission line equipped with FACTS devices are studied. The capabilities of increasing the transmitted power limits to a level of more than 30% above the power line surge impedance loading are shown. The effect the coordinated control of FACTS devices has on the power line small-signal stability is analyzed. By incorporating the power transmission full phasor difference feedbacks into the FACTS device control systems it becomes possible to obtain good small-signal stability indices in the entire range of power transmission operation. Tt has been found that a quite moderate response speed is required in measuring, transmitting, and converting such signals. The transient stability of a long-distance extra-high voltage ЛС transmission line under two-phase short-circuit on the power plant buses is calculated, and the need of using additional emergency controls to maintain its stable operation is shown.


2019 ◽  
Vol 84 ◽  
pp. 02005
Author(s):  
Marek Lis ◽  
Andriy Chaban ◽  
Andrzej Szafraniec ◽  
Radosław Figura ◽  
Vitaliy Levoniuk

In the paper, based on interdisciplinary approaches to modeling, a mathematical model of a part of an opened extra-high voltage electrical grid, which key elements are two long power transmission lines with distributed constants is presented. Within this framework the analysis of transient processes in power transmission lines in a single-line arrangement is carried out. The results of transient processes are displayed by means of figures; they are under ongoing research.


2014 ◽  
Vol 666 ◽  
pp. 138-143 ◽  
Author(s):  
Rinat Ildarovich Shagiev ◽  
Arkadi Vasilyevich Karpov ◽  
Sergei Aleksandrovich Kalabanov

The article describes the diagnostics system of the power transmission lines of 6/10 kVolts on the basis of smart electric modems. It shows the description of the smart electric modem and the creation principle of the diagnostics system. The main feature here is the use of power transformers as coupling devices with a high-voltage power line.


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