scholarly journals Reduction of the Environmental Impact of Electric Field Generated by High Voltage Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6388
Author(s):  
Rafał Tarko ◽  
Konrad Kochanowicz ◽  
Wiesław Nowak ◽  
Waldemar Szpyra ◽  
Tadeusz Wszołek
Keyword(s):  
Environmental Impact ◽  
Electric Field ◽  
High Voltage ◽  
Transmission Lines ◽  
Computational Models ◽  
Power Transmission ◽  
Power Lines ◽  
Design Parameters ◽  
Noise Emission ◽  
Field Influence

The growing interest in the negative environmental impact of overhead power lines of high and extra-high voltage stems from the increasing ecological awareness of societies. Consequently, a number of respective legal restrictions have been issued and actions have been undertaken to reduce this impact, especially in the electric field of the power frequency. The aim of this paper is to analyze the possibilities of reducing the width of electric field influence zones by changing the design parameters of power lines and defining the spatial distribution of its conductors. This analysis was carried out using the developed and experimentally verified models for determining the electric field and audible noise in the power line environment. The computational models were used to analyze the width of the electric field influence zones of 400 kV lines and the noise levels at the borders of these zones. The research focused on single and double circuit 400 kV power lines. It was revealed that a reduction in electric field emissions is accompanied by an increase in noise emission. However, the analyses confirmed that the width of the electric field influence zones can be significantly reduced if the most important design and construction parameters of the line are properly selected. The obtained conclusions are valid not only for 400 kV lines, but also set directions to follow when changing the parameters of high voltage transmission lines of other rated voltages (above 100 kV).

scholarly journals Dynamic Line Rating—An Effective Method to Increase the Safety of Power Lines

2021 ◽  
Vol 11 (2) ◽  
pp. 492
Author(s):  
Levente Rácz ◽  
Bálint Németh
Keyword(s):  
Expert System ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Power Line ◽  
Power Lines ◽  
Design Parameters ◽  
Monitoring Methods ◽  
Limit Value ◽  
Potential Applications

Exceeding the electric field’s limit value is not allowed in the vicinity of high-voltage power lines because of both legal and safety aspects. The design parameters of the line must be chosen so that such cases do not occur. However, analysis of several operating power lines in Europe found that the electric field strength in many cases exceeds the legally prescribed limit for the general public. To illustrate this issue and its importance, field measurement and finite element simulation results of the low-frequency electric field are presented for an active 400 kV power line. The purpose of this paper is to offer a new, economical expert system based on dynamic line rating (DLR) that utilizes the potential of real-time power line monitoring methods. The article describes the expert system’s strengths and benefits from both technical and financial points of view, highlighting DLR’s potential for application. With our proposed expert system, it is possible to increase a power line’s safety and security by ensuring that the electric field does not exceed its limit value. In this way, the authors demonstrate that DLR has other potential applications in addition to its capacity-increasing effect in the high voltage grid.

scholarly journals Wind: generating power and cooling the power lines

2020 ◽  
Vol 17 ◽  
pp. 105-108
Author(s):  
Marko Kaasik ◽  
Sander Mirme
Keyword(s):  
Wind Speed ◽  
Electric Power ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Mixed Forest ◽  
Wind Farms ◽  
Power Line ◽  
Power Lines ◽  
Local Wind

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.

scholarly journals THE ANALYSIS OF LANDS IN SECURITY ZONES OF HIGH-VOLTAGE POWER LINES (POWER LINE) ON THE EXAMPLE OF THE FERGANA REGION

2020 ◽  
pp. 55-58
Author(s):  
Abdullayev Ibrohim Numanovich ◽  
Marupov Azizxon Abbosxonovich
Keyword(s):  
Land Use ◽  
Real Estate ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Negative Impact ◽  
Time Frame ◽  
Power Lines ◽  
Power Transmission Lines ◽  
High Voltage Power Lines

Practice shows that the lack or late receipt of information with special conditions for the use of territories often has a negative impact not only on the budget and time frame for the construction of a real estate facility, but also on the fate of the built facility in general. The protection areas of underground and above-ground engineering communications play an important role for the future in land use. And also, when using these lands for agricultural needs, with the correct organization of cadastral relations represents the relevance of the issue under study. In the present, as an example, a section of high-voltage power transmission lines (power lines) of 1 km length is presented. KEY WORDS: security zones, land plot, information about zones, high-voltage zones, power transmission lines, pipelines, gas pipelines, bonality score, engineering networks, construction of buildings and structures.

scholarly journals Quantitative Analysis of Plant Growth Exposed to Electric Fields

2015 ◽  
Vol 16 (2) ◽  
pp. 207
Author(s):  
Hussein Ahmad ◽  
Mohd Hafizi Ahmad ◽  
Noor 'Aliaa Awang ◽  
Izzah Hazirah Zakaria
Keyword(s):  
Quantitative Analysis ◽  
Electric Field ◽  
Electric Fields ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Germination Rate ◽  
Power Transmission Lines ◽  
High Power Transmission ◽  
Electromagnetic Radiations

<p>Electromagnetic radiations present in the environment has a profound effect on the growth of vegetable plant primarily grown under the high power transmission lines. The high electric field generated due to ultra high voltage causes the increase and reduction in the size of the plants. Numerous research have been carried out to investigate the effect of electric field on the plants. However, the knowledge in term of quantitative analysis on the effect of electric field on the growth of vegetables is not entirely understood. Thus, this paper presents a study conducted to investigate the effect of high voltage DC electric fields on the young vegetables growth namely ‘Choy Sam’ and bean sprout. The experimental setup was designed which composed of two parallel plate electrodes. This research was focused on the percentage of germination and growing rate of young vegetables. The growth of the young vegetables during exposure was calculated by using statistical methods. The analysis of the results showed that the electric fields and the electric fields treated water have influenced the germination rate and height of stems of both young vegetables causing the increase in stem height.</p><p> </p>

HIGH VOLTAGE MONITORING OF GEOMAGNETIC INDUCED CURRENTS

2020 ◽  
pp. 20-28
Author(s):  
V.P. Sivokon ◽  
◽  
Keyword(s):  
Russian Federation ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Lines ◽  
Natural Phenomenon ◽  
Contactless Method ◽  
The Russian Federation ◽  
Induced Currents ◽  
High Voltage Power Lines

Within the framework of the national project “Digital economy of the Russian Federation” the Ministry of energy of the Russian Federation is implementing the departmental project “unified technical policy – relia-bility of power supply”. The main objectives of the departmental project are aimed at implementing risk-based management, improving the level of reliability of energy supply to consumers. One of the risk factors for pow-er supply systems is a natural phenomenon caused by ionospheric-magnetospheric connections – geomagnetic-induced currents. The proposed method for assessing these risks is based on the registration of higher harmon-ics in high-voltage power lines, which makes it possible to improve the accuracy of diagnostics of geomagnet-ic-induced currents by reducing the influence of the network's own harmonics. The choice of the optimal even harmonic number for diagnostics is theoretically shown and experimentally confirmed. A contactless method for obtaining information about variations of higher harmonic components in high-voltage power lines is pro-posed and tested. The degree of the 6th harmonics correlation in 220 kV power transmission lines of Mutnovskaya Geothermal Power Plant with the Earth's magnetic field variations obtained at the observatory “Paratunka” (Paratunka village, Kamchatsky Krai) was experimentally investigated.

scholarly journals Estimating the electric field response to the Halloween 2003 and September 2017 magnetic storms across Scotland using observed geomagnetic fields, magnetotelluric impedances and perturbation tensors

2020 ◽  
Vol 10 ◽  
pp. 48 ◽  
Author(s):  
Fiona Simpson ◽  
Karsten Bahr
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Electric Field ◽  
Electric Fields ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Impedance Tensor ◽  
Power Transmission Lines ◽  
Peak Electric Field

Geomagnetic storms generate heightened magnetovariational activity, which induces electric fields that drive hazardous currents known as geomagnetically induced currents (GICs) through man-made technological conductors including power transmission lines, railway networks and gas pipelines. We multiply magnetotelluric (MT) impedances from 23 sites in Scotland and northern England with measured geomagnetic field spectra from the Halloween 2003 and September 2017 storms to estimate maximum peak-to-peak, electric field magnitudes and directions for these storms, which we present as hazard maps. By sampling these electric fields in the direction of the longest (>50 km), high-voltage (275 and 400 kV) Scottish power transmission lines and integrating along their lengths, we estimate their associated transmission-line voltages. Lateral electrical conductivity variations in the Earth generate horizontal magnetic field gradients. We investigate the effect of these gradients on electric field estimates obtained using remote magnetic fields by applying a correction to the impedance tensor derived from the magnetic perturbation tensor between the local MT site and the remote magnetic field site. For the September 2017 storm, we also compare our estimated electric fields with a unique dataset comprising measured storm-time electric fields from 7 MT sites. We find that peak-to-peak, electric field magnitudes may have reached 13 V/km during the Halloween storm in some areas of the Scottish Highlands, with line-averaged electric fields >5 V/km sustained along a number of long-distance, high-voltage power transmission lines; line-averaged electric fields for the September 2017 storm are 1 V/km or less. Our surface electric fields show significant site-to-site variability that arises due to Earth’s internal 3D electrical conductivity structure, as characterised by the MT impedance tensors.

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