Journal articles: 'High Voltage Overhead Transmission Lines'

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Wadley, David, Jung Hoon Han, and Peter Elliott. "Regarding high voltage overhead transmission lines (HVOTLs)." Property Management 37, no. 2 (April 15, 2019): 178–96. http://dx.doi.org/10.1108/pm-04-2018-0024.

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Purpose Professionals’ market knowledge and business experience can facilitate transactions of residential property potentially impacted by stigmatised installations, such as large-scale public infrastructure. The purpose of this paper is to explore perceptions and assessments among homeowners, valuers (appraisers) and real estate agents (realtors) regarding infrastructure in general and high voltage overhead transmission lines (HVOTLs) in particular. Design/methodology/approach Informed by a literature review, separate surveys in Queensland, Australia, analyse via non-parametric and parametric means informational and perceptual variables concerning HVOTLs among 600 homeowners, 90 valuers and 90 real estate agents. Findings The findings reveal statistically significant differences in risk and valuation perceptions of homeowners, valuers and real estate agents relating to the placement of major linear forms of infrastructure. Research limitations/implications This study adds to a now-solid body of literature pertaining to property effects of HVOTLs. It extends the analysis among classes of real estate professionals and provides new comparisons for further analysis and commentary. Practical implications The results speak to property professionals, land use planning and electricity authorities. Prior research can be triangulated with that obtained here from valuers and real estate agents who act as informants, gatekeepers and confidants in the market place. Various hypotheses address specific points of professional practice. Social implications This study shows that property professionals’ disposition to HVOTLs and other large-scale infrastructure is likely to be a good deal more measured than that of homeowners, so that valuers and real estate agents might exercise a mediating influence in placement and installations decisions. Originality/value This research raises understanding of differences in market knowledge and perception of essential infrastructure among clients and property agents. As a point of difference, it concentrates on examining empirically what texts refer to as “information asymmetry” in residential real estate markets.

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Shishkov, Evgeny, Valery Goldstein, and Ivan Krivihin. "Open Overhead Transmission Lines." Applied Mechanics and Materials 792 (September 2015): 293–99. http://dx.doi.org/10.4028/www.scientific.net/amm.792.293.

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Ultra High-Voltage Overhead Lines (UHV OHL) currently are successfully applied for solving two problems. The first case is powerful interconnection of two or more electric power systems. The second one is transition of significant power flows from generation areas to consuming areas – densely populated urban agglomerations and industrial centers. Longitudinal compensation installations are integral part of long-distance UHV OHL. The possibility of designing self-compensated OHL is considered in the paper.

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SAIED, MOHAMED M., MONJI G. JABOORI, and DINA N. AL-NAKIB. "OPTIMAL DESIGN OF HIGH VOLTAGE OVERHEAD TRANSMISSION LINES." Electric Machines & Power Systems 18, no. 3 (May 1990): 293–311. http://dx.doi.org/10.1080/07313569008909474.

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Zyss, T. "Overhead High-Voltage Transmission Lines and Psychiatric Symptomatology." European Psychiatry 12, S2 (1997): 219s. http://dx.doi.org/10.1016/s0924-9338(97)80686-4.

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Zhang, Meng, Guifeng Zhao, and Jie Li. "Nonlinear Dynamic Analysis of High-Voltage Overhead Transmission Lines." Shock and Vibration 2018 (2018): 1–35. http://dx.doi.org/10.1155/2018/1247523.

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According to a generalized Hamilton’s principle, three-dimensional (3D) nonlinear vibration equations for overhead transmission lines that consider geometric nonlinearity are established. Based on the characteristics of an actual transmission line, the 3D equations are simplified to two-dimensional equations, and the nonlinear vibration behavior of transmission lines is investigated by combining theoretical analysis with numerical simulation. The results show that transmission lines have inherently nonlinear vibration characteristics. When in free vibration, a transmission line can undergo nonlinear internal resonance, even when its initial out-of-plane energy is relatively low; as its initial out-of-plane energy increases, the coupling of in-plane and out-of-plane vibration becomes stronger. When forced to vibrate by an external excitation, due to the combined action of internal and primary resonance, the vibration energy of a transmission line transfers from the out-of-plane direction to the in-plane direction that is not directly under the excitation, resulting in an increase in the dynamic tension and the displacement amplitude of the transmission line. Increasing damping can consume the vibration energy of a transmission line but cannot prevent the occurrence of internal resonance.

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Alameri, Ban M. "ELECTROMAGNETIC INTERFERENCE (EMI) PRODUCED BY HIGH VOLTAGE TRANSMISSION LINES." EUREKA: Physics and Engineering 5 (September 30, 2020): 43–50. http://dx.doi.org/10.21303/2461-4262.2020.001398.

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Electromagnetic interference in high voltage transmission lines has been an interest topic due to its effect on human health, plants, electrical and telecommunication equipment. Extremely high voltages (EHV) in transmission lines are reasons of electrostatic effects, while short circuit currents and line loading currents are responsible for electromagnetic effects. The aim of this research is to analyze electromagnetic fields in high voltage transmission lines in theoretical study and calculating its level in overhead T. L and therefore estimated the EMI produced, by employing a mathematical model of 230 KV tower double circuit configurations of high voltage transmission lines. The calculation is based on computer aided analysis (CAA) by using fields and corona effects software (FACE). It's found that the overhead power lines of general frequency (50 Hz) generates a highly intense magnetic field, the electromagnetic fields depends on the distance from sources and the type of line configuration. They decrease as the distance increase from the tower and conductors and increase with a high current. The strength of an electric field is proportional to the voltage of the line and the magnetic field strength is proportional to the current in the high voltage transmission lines. Distribution line with a high current load may produce a magnetic field that is as high as those produced by some high voltage transmission lines. Some techniques of reduction of the effects of electromagnetic interference have suggested such as rearrangement conductors of transmission line, and distance from phase conductor and grounding system. The study recommended to keep safety distance operation in high voltage transmission lines with the necessity for engineer to take into account the effect of electromagnetic interference in the design stage of high voltage transmission power system, and to avoid any addition cost may be occur due to neglected effects of electromagnetic interference that produces by high voltage transmission lines

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Jayaratne, E. R., F. O. J-Fatokun, and L. Morawska. "Air ion concentrations under overhead high-voltage transmission lines." Atmospheric Environment 42, no. 8 (March 2008): 1846–56. http://dx.doi.org/10.1016/j.atmosenv.2007.11.017.

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Lazaropoulos, Athanasios G. "Broadband Transmission and Statistical Performance Properties of Overhead High-Voltage Transmission Networks." Journal of Computer Networks and Communications 2012 (2012): 1–16. http://dx.doi.org/10.1155/2012/875632.

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This paper considers broadband signal transmission and statistical performance properties of high-voltage/broadband over power lines (HV/BPL) channels associated with overhead power transmission. The overhead HV/BPL transmission channel is investigated with regard to its spectral behavior, its end-to-end signal attenuation, and its statistical performance metrics. It is found that the above features depend critically on the frequency, the overhead HV power grid type (150 kV, 275 kV, or 400 kV and single- or double-circuit), the coupling scheme applied, the physical properties of the cables used, the MTL configuration, and the type of branches existing along the end-to-end BPL signal propagation. The contribution of this paper is threefold. First, the significant broadband transmission potential of overhead HV lines is revealed. The results demonstrate that, regardless of overhead HV power grid type, the overhead HV grid is a potentially excellent communications medium, offering low-loss characteristics, flat-fading features, and low multipath dispersion over a 25 km repeater span well beyond 100 MHz. Second, regarding the statistical properties of various overhead HV/BPL transmission channels, two fundamental correlations of several wireline systems, for example, coaxial cables and xDSL, are also validated in the case of overhead HV/BPL transmission channels, namely, (i) end-to-end channel attenuation in relation with root-mean-square delay spread (RMS-DS) and (ii) coherence bandwidth (CB) in relation with RMS-DS. Third, fitting the numerical results and other field trial measurements, two regression distributions suitable for each fundamental correlation are proposed.

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Sun, Dong Mei, and Jun Wen. "Researches on Reactive Compensation for Long-Distance and Highcapacity Hybrid Submarine Cable Lines." Advanced Materials Research 433-440 (January 2012): 2406–10. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.2406.

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In order to balance reactive power, reduce line losses, prevent excessive power frequency and switching over-voltage and adjust and control the line voltage etc. The long-distance and high voltage transmission lines are needed reactive power compensation. High voltage overhead transmission lines and high voltage submarine cable (including mixed-submarine) transmission lines are different, for example, the capacitance in the submarine cable lines is larger than in the conventional overhead lines. Therefore, the reactive power compensation on the EHV transmission lines which contains submarine cable lines is focus on the compensation of submarine cable lines. The reactive power compensation in 500 kV AC submarine cable interconnection project for Hainan power grid and Guangdong power grid[1], which is the first 500 kV long-distance and high-capacity sea trails interconnection project in China and which is just completed soon, is researched by Electro-Magnetic Transient Program——PSCAD/EMTDC (Power System Computer Aided Design/ Electro Magnetic Transient in DC System in this paper). The simulation results verifies that the role of shunt reactor which could absorb charging power and suppress the power frequency overvoltage for the long-distance and high-capacity hybrid submarine cable lines. The conclusions can offer references to suppress power frequency overvoltage and the reactive power compensation in extra high voltage transmission lines which is the mixed mode of overhead transmission lines and submarine cables.

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Al-Kharsan, Ibrahim Hasan, Ameer Al-khaykan, and Hassan Falah Fakhruldeen. "Expansion of high-voltage overhead transmission lines to remote areas." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 4 (December 1, 2022): 2488. http://dx.doi.org/10.11591/ijpeds.v13.i4.pp2488-2497.

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<span>Delivering electrical energy to remote areas is one of the essential things in our modern world. Choosing the optimal route is one of the most critical factors contributing to reducing the power transmission system's cost. Other influencing factors such as the optimum alloy of the conductor wires are difficult to change, so only the aforementioned factor was adopted. In this paper, the optimized potential field algorithm is employed to determine the sub-optimum path that the transmission line should be installed. The best line for the towers is not necessarily the shortest or the cheapest one. Sometimes the best locations for the towers of the transmission lines coming according to the safety regards. It can be said that the best trajectory is a combination of several factors, including the length of the track in addition to other influencing factors depending on the work environment.</span>

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Christodoulou, C. A., L. Ekonomou, G. P. Fotis, N. Harkiolakis, and I. A. Stathopulos. "Optimization of Hellenic overhead high-voltage transmission lines lightning protection." Energy 34, no. 4 (April 2009): 502–9. http://dx.doi.org/10.1016/j.energy.2009.02.002.

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Houicher, Salah-Eddine, Rabah Djekidel, and Sid-Ahmed Bessidik. "Simple Approximation of the Magnetic Induction Inside High Voltage Overhead Transmission Lines." E3S Web of Conferences 336 (2022): 00076. http://dx.doi.org/10.1051/e3sconf/202233600076.

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With the development of electrical power transmission networks, are resulted the increase and continuous consumption of various power production sources, this is what requires the large quantities of energy construction. The increased demand in electric power employment has generated an raised of operating voltage for transmission lines (HV and VHV). The high voltage overhead transmission lines create electric and magnetic fields, and therefore have elevated serious concern questions about their possible potential effects in human body and environmental great associated with the resulting higher levels of electromagnetic fields strength around these power lines. The accurate evaluation of extremely low frequency electromagnetic fields influences produced by the high voltage overhead power lines on human health and the environment are well very known and analysed in several research works and simulation study projects. In this paper we precise examine and present a methodology for plot the lateral profile of magnetic field distribution in close a three-phase overhead transmission line in single circuit flat horizontal configuration at height 1m above the ground level, In order show the essentials factors affecting in the magnetic fields intensity under and in the vicinity of high voltage overhead transmission line in any point of space surface and ground plane, the analytique calculation results of the lateral profile of magnetic flux density behaviour are obtained by program MATLAB software, which makes it possible better analyser and easy represent the transverse profile of the magnetic field around electric power transmission lines, the numerique simulation results are based in image method and the superposition theorem.

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Callanan, Judith. "Is the effect of high voltage transmission lines undervalued?" International Journal of Housing Markets and Analysis 10, no. 2 (April 3, 2017): 221–30. http://dx.doi.org/10.1108/ijhma-04-2016-0028.

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Purpose The purpose of this paper is to determine whether the discount placed on high voltage overhead transmission lines is underestimated. Design/methodology/approach A quantitative analysis was undertaken, using a high voltage overhead transmission line (HVOTL) case study, to determine the effect on property values prior and post removal of the HVOTL structure. Sales data and demographics are compared to determine the change in neighbourhood characteristics. Findings The results show that while the HVOTL is in place, the impact on value is confined to those properties in close proximity. This is in contradiction to the findings, where on removal of the HVOTL, the property values of the whole neighbourhood improve significantly. Research limitations/implications The implication of this research is that property valuers (appraisers) need to change the way they take into account the presence of HVOTLs when valuing property, with more emphasis, being placed on the neighbourhood rather than just the properties in close proximity. While the HVOTL was in place, only properties in close proximity were negatively affected, but on removal of the HVOTL the whole neighbourhood increased in value. Originality/value Results expand on current knowledge by demonstrating the difference between the discount rate that the valuers apply to the presence of the HVOTL, as compared to the positive impact to the whole neighbourhood on removal of the HVOTL.

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Ashraf Balametov, Ashraf Balametov, and Tarana Isaeva Tarana Isaeva. "SOFTWARE FOR MONITORING AC CORONA EFFECTS OF OVERHEAD LINES." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 20, no. 09 (September 14, 2022): 04–14. http://dx.doi.org/10.36962/pahtei20092022-04.

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The issues of environmental impact of high-voltage transmission lines are becoming relevant in connection with the development of electrical networks of high voltage 110, 220, 330 kV, extra-high voltage (EHV) 500-750 kV and ultra-high voltage 1150 kV. The harmful effect of electric and magnetic fields on living organisms and, first of all, on humans, manifests itself only at very high voltages in the wires of the overhead line (OH) phases, and is dangerous when working under voltage. The direct influence of the electromagnetic field of lines on a person is associated with an effect on the cardiovascular, central nervous systems and other organs. The harmful effects of a person's stay in a strong electric field depend on the strength of the field and on the duration of its exposure. Software has been developed for modeling electromagnetic compatibility, characteristics of power losses to the corona from the voltage impact on the environment. The results of simulation of corona losses are presented on the example of a 500 kV overhead line, electric field voltage and active energy losses due to radio interference. Keywords: environmental impact, overhead power lines, electric field strength, corona losses, radio interference, acoustic noise, electromagnetic compatibility

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Orlov, Aleksandr I., Sergei V. Volkov, Ilsur Kh Garipov, and Sergey G. Nikiforov. "ANALYSIS OF POSSIBILITY OF LOW POWER TAKE-OFF FROM MEDIUM VOLTAGE OVERHEAD TRANSMISSION LINES." Vestnik Chuvashskogo universiteta, no. 1 (March 30, 2022): 100–106. http://dx.doi.org/10.47026/1810-1909-2022-1-100-106.

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The paper considers the possibility of using capacitive power take-off from medium voltage overhead power lines with isolated neutral. Direct scaling of the designs of the known 1-phase capacitive power take-off devices intended for high voltage overhead power lines is impractical for several reasons: the impossibility of obtaining significant power, violation of the operating conditions of protection against single-phase earth faults, the creation of asymmetry of phase voltages relative to the ground. As a power take-off device, it is proposed to use a 3-phase symmetrical circuit of a capacitive voltage divider with a voltage converter at the output, which makes it possible to minimize the indicated disadvantages. On the basis of computer simulation of the equivalent circuit of an overhead line section with a power take-off device, its external characteristics were obtained for various values of the capacitance of the voltage divider capacitors. The simulation results confirm the technical feasibility and feasibility of using the proposed power take-off method for feeding low-power 1- and 3-phase consumers.

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Astapov, A. Y., I. P. Krivolapov, D. V. Akishin, A. S. Gordeev, and A. A. Naydenov. "Improvement of energy efficiency of agricultural enterprises through the survey of high-voltage transmission lines using unmanned aerial vehicles." IOP Conference Series: Earth and Environmental Science 845, no. 1 (November 1, 2021): 012156. http://dx.doi.org/10.1088/1755-1315/845/1/012156.

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Abstract The paper studies the reliability of transmission lines of Michurinsk district electric lines in Tambov Region. It evaluates the quality of overhead power transmission lines in the support-insulator-wire system and determines the reliability factor of overhead lines. The paper proposes methodological approaches to the survey of power transmission lines using unmanned aerial vehicles. Their use seems quite promising and profitable, since the cost of such work is an order of magnitude lower.

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Vinogradov, A. V., A. A. Lansberg, and A. V. Vinogradova. "Analysis of the technical condition and service life of 35-110 kV overhead power transmission lines in the Oryol Region." Vestnik MGTU 25, no. 4 (December 22, 2022): 324–33. http://dx.doi.org/10.21443/1560-9278-2022-25-4-324-333.

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The assessment of the technical and operational characteristics of overhead transmission lines of voltage classes 35-110 kV in the Oryol Region has been carried out in accordance with the methodology presented in the order of the Ministry of Energy of the Russian Federation dated July 26, 2017 No. 676; their service life was determined according to STO 56947007-29.240.01.053-2010. The analysis of the length of overhead lines and the types of conductors used has taken place using support-by-support schemes. In the construction of 35 kV lines, steel-aluminum wire (sectional area - 70 mm) is mainly used, the length of which is 1,358,456 km, and 110 kV overhead lines are made using an AS-120 conductor (1,094 km). Overhead transmission lines are characterized by high indicators of technical condition, since 40 % of lines of voltage class 35 kV and 53 % of lines of voltage class 110 kV are in very good technical condition with a wear rate of no more than 15 %. The study has found that 71 % of overhead lines with a voltage of 35 kV and 85 % of lines with a voltage of 110 kV have been in operation for more than 35 years; at the same time, due to the implementation of a timely strategy for maintenance and repair, the lines are characterized by high indicators of technical condition.

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Ekonomou, L., G. P. Fotis, and T. I. Maris. "Cost related optimum design method for overhead high voltage transmission lines." European Transactions on Electrical Power 18, no. 5 (July 2008): 437–47. http://dx.doi.org/10.1002/etep.185.

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Nie, Jing. "A New High Voltage Transmission Lines Deicer Based on Vibrations Principle." Advanced Materials Research 772 (September 2013): 604–7. http://dx.doi.org/10.4028/www.scientific.net/amr.772.604.

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In recent years, for the high voltage transmission lines suffered serious Icing lead wire dancing, break and tower collapsed, domestic and foreign strengthened the study of high-voltage overhead line deicing methods and put forward a variety of line deicing methods. This paper first introduced thermal ice-melting method, mechanical deicing method, natural deicing method and several common deicing methods and analyzed the pros and cons of various deicing program. Based on the analysis of deicing methods for the high voltage transmission lines, a new and simple high voltage transmission line deicer is brought forward. This paper briefly discussed the basic principles and advantages of the device, providing a new way of thinking for the high voltage transmission lines deicing and having a certain value and social benefits.

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Fahad, Jabbar Qasim, and Riyadh Kamil Chillab. "Design aspects of high voltage transmission line." Bulletin of Electrical Engineering and Informatics 9, no. 3 (June 1, 2020): 853–61. http://dx.doi.org/10.11591/eei.v9i3.2062.

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The transmission lines are very important in the transmitted of electrical power, and the process of selecting the voltage of the line is an important task in the design and implementation process. The process of transferring electrical power from one side then onto the next place for long away. While maintaining the percentage regulation within the permissible limits is an important problem in the transfer of energy. In electrical transmission line there are important elements are resistance, inductance and capacitance. The purpose of this paper is to study and calculate economic high-tension voltage and selection of overhead line conductor ACSR.

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Zhang, Xiu Bin, Ding Jun Wen, Ya Ming Sun, and Hong Gang Chen. "Lightning Overvoltage Analysis and Calculation of 330kV Overhead Transmission Line." Applied Mechanics and Materials 556-562 (May 2014): 1588–91. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1588.

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Lighting is one of the important reasons of transmission line trip accident. For 330kV and above ultra high voltage transmission line, lighting flashover more frequently occur. To reduce tripping rate effectively and fundamentally, lightning over voltage level should be analyzed besides anti-pollution flashover. In this paper, a simplified equivalent circuit model of a 330kV overhead transmission lines is established. The lightning over voltage of the transmission is analyzed and calculated. Method to reduce the lightning overvoltage is discussed.

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Lu, Di, and Jian Xin Wang. "The Analysis and Research on Electromagnetic Radiation Pollution of High Voltage Transmission Line." Advanced Materials Research 374-377 (October 2011): 8–13. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.8.

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With the development of China's power industry, many cities had renovated, expanded electricity power network ,110、220 kV and above the high voltage overhead transmission lines all around the urban areas and residential areas. As the electromagnetic radiation of high-voltage transmission lines inevitability pollute on urban environment, according to the Investigation, monitoring and analysis of high voltage, based on national standard of electromagnetic radiation, this paper proposed the controlling measures and recommendations of electromagnetic radiation. Therefore, the research that the electromagnetic radiation impact on the environmental has a very high value and academic significance.

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Yaroslavsky, D. A. "Analytical models of movement of wires of air high-voltage power transmission lines." Power engineering: research, equipment, technology 24, no. 4 (August 17, 2022): 154–64. http://dx.doi.org/10.30724/1998-9903-2022-24-4-154-164.

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The article PURPOSE with the problem of monitoring the state of high-voltage overhead power lines in order to ensure uninterrupted and reliable supply of consumers with electricity. METHODS. As parameters of the state, the sag, the tensile force and the mass per unit length of the wire hanging in the span are defined. IT IS STRESSED that a complete picture of the state of an overhead line can be established by determining the spectral composition of the wire vibrations using mounted automated multi-parameter sensors with accelerometers as sensors. It is shown that the currently used dynamic models for describing the motion of a wire as a pendulum and as a tightly stretched string are not complete enough to represent the vibrations of the wire in all three spatial coordinates, do not cover vibrations with odd harmonics and symmetrical vibrations. A system of equations has been OBTAINED that makes it possible to describe the spatial oscillations of the wire along all three axes, taking into account the difference in heights of the wire suspension points. IT IS SHOWN that the analysis of the higher harmonics of the spectrum of vibrations of the wire makes it possible to determine all the main mechanical parameters of the wires of overhead power lines.

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Straumann, Ueli. "Mechanism of the tonal emission from ac high voltage overhead transmission lines." Journal of Physics D: Applied Physics 44, no. 7 (January 28, 2011): 075501. http://dx.doi.org/10.1088/0022-3727/44/7/075501.

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Wadley, David, Peter Elliott, and Jung Hoon Han. "Modelling homeowners’ reactions to the placement of high voltage overhead transmission lines." International Planning Studies 22, no. 2 (August 2, 2016): 114–27. http://dx.doi.org/10.1080/13563475.2016.1202100.

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Furgał, Jakub. "Influence of Lightning Current Model on Simulations of Overvoltages in High Voltage Overhead Transmission Systems." Energies 13, no. 2 (January 7, 2020): 296. http://dx.doi.org/10.3390/en13020296.

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The analysis of lightning overvoltages generated in electrical power systems has a great meaning for the designers and exploitation engineers because it creates bases for the optimization of construction overhead transmission lines and high voltage substations, reducing costs and increasing reliability of the transmission and distribution of electrical energy. Lightning overvoltages generated in electrical power systems with overhead transmission lines are a result of complex, nonlinear, and surge phenomena occurring in the structure of line towers and electrical substation when the lightning current is flowing through them. Methods of overvoltage stress analysis are intensely developed, and one of the directions is working out models of high voltage electrical devices and phenomena in electrical networks, which influence the shape and values of overvoltage risks. The model of lightning current has a significant influence on the courses of overvoltages in high voltage transmission systems. The paper is focused on the analysis of the influence of the model of lightning current making use of simulations of the shape, and maximal values of overvoltages generated in high voltage transmission systems during a direct lightning strike to the overhead lines. Two models of lightning current used in simulations with the Electromagnetic Transients Program/Alternative Transient Program (EMTP/ATP) were analyzed, i.e., the Heidler model and CIGRE (Conseil International des Grands Réseaux Électriques) model. The EMTP/ATP computer program is very often used in simulations of overvoltages in electrical networks. Unfortunately, the users get no information on the criterion to be used when selecting the model of lightning current used in the simulations. The analysis presented in the paper gives practical knowledge about the effect of the use of a particular kind of lightning current model on the results of simulations of lightning overvoltage propagation in electrical networks, overvoltage protection, as well as on theoretical and practical aspects of the insulation coordination in high voltage transmission systems.

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Tomislav Barić, Hrvoje Glavaš, and Lajos Jozsa. "CAPACITIVE INFLUENCE OF HIGH VOLTAGE OVERHEAD TRANSMISSION LINES ON THE MEASUREMENT OF SOIL RESISTIVITY." Journal of Energy - Energija 56, no. 2 (November 16, 2022): 232–49. http://dx.doi.org/10.37798/2007562354.

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In this article, an analysis is presented of the impact of high voltage overhead transmission lines on the measurement of soil resistivity. Through analysis, the measurement noise level due to the vicinity of the phase conductors of a high voltage overhead transmission line is determined. The soil is modeled as an anisotropic homogeneous half-space of finite resistivity. In order for the article to be of practical use to engineers, simple mathematical instrumentation has been used. Detailed expressions and the physically objective hypotheses under which the cited model is valid have been derived. For the simplicity and generality of the presentation, analysis was performed using a practical example of the measurement of soil resistivity by the Wenner method. The example refers to a single system high voltage transmission line with a steel tower. The results obtained by the theory presented are compared to the results obtained with the software package CDEGS (Current Distribution, Electromagnetic Fields, Grounding and Soil Structure Analysis). The results obtained are presented analytically, graphically and are discussed.

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Quan, Yu Sheng, En Ze Zhou, Hua Gui Chen, and Xin Zhao. "New Methodology of On-Line Monitoring for High Voltage Overhead Transmission Line Icing." Advanced Materials Research 805-806 (September 2013): 871–75. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.871.

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In recent years,transmission lines icing leads to failure and accidents,such as large area ice flashover, fittings damaged, line dancing, pole (tower) failure, lines breakage even large-scale power outage, causing serious threat to grid. Nowadays, icing monitoring system mainly relies on detecting the meteorological parameters and the changes of dynamic characteristics for early warning, but the methodologies need additional equipment for data collection. In order to ensure the security and reliability of the grid, a safe, effective and economical methodology of monitoring transmission lines icing has great significance. The project proposed a Transmission Line Icing monitoring principle and algorithm, the method based only on the voltage and current from both ends of transmission lines can be generated dynamically monitoring criterion line icing. According to the criterion maximum, line icing center area, extent and severity can be recognized. The criterion of the method is used as a mathematical scanner, swept from one end of the line to the other end, comprehensive judgments are made on the basis of comprehensive criteria for integrated maximum value, thus the method has a high diagnostic accuracy and reliability. The methodology proposed in this paper is different from the current monitoring methodology; additional hardware devices are not required, and the methodology is simple and practical, has strong operability and enormous economic benefits, adapting to the requirements of the development of the smart grid.

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Abu-Khasan, Makhmud, Valentina Soloviova, and Dmitry Soloviov. "High-strength concrete with new organic mineral complex admixture." MATEC Web of Conferences 265 (2019): 01003. http://dx.doi.org/10.1051/matecconf/201926501003.

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There are the great problems of the concrete for high voltage the transmission lines obtaining. One of them is the creation of reinforced concrete centrifugally spun transmission towers with enhanced reliability and durability for high-voltage transmission lines having voltage of 110-750 kV. The second problem is the creation of high-quality reinforced concrete foundations to fix overhead electric line lattice towers in the ground because more than 50% of operated reinforced concrete towers and foundations are in need of repair or were put into repair. A complex high-performance organic mineral admixture for tower bodies of high-voltage transmission lines is developed. The main components of the admixture are polycarboxylate polymere and silica sol. It insures increased compressive strength and tensile strength in bending, freeze resistance, waterproofing and corrosive resistance. The obtained positive results allow to reduce a compression zone width and a crack growth width. The paper can be useful for not only the transport construction but and for concrete obtaining with special properties at any fields.

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Abu-Khasan, Mahmud, Valentina Solovyova, and Dmitry Solovyov. "High-strength Concrete with new organic mineral complex admixture." MATEC Web of Conferences 193 (2018): 03019. http://dx.doi.org/10.1051/matecconf/201819303019.

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There are the great problems of the concrete for high voltage the transmission lines obtaining. One of them is the creation of reinforced concrete centrifugally spun transmission towers with enhanced reliability and durability for high-voltage transmission lines having voltage of 110-750 kV. The second problem is the creation of high-quality reinforced concrete foundations to fix overhead electric line lattice towers in the ground because more than 50% of operated reinforced concrete towers and foundations are in need of repair or were put into repair. A complex high-performance organic mineral admixture for tower bodies of high-voltage transmission lines is developed. The main components of the admixture are polycarboxylate polymere and silica sol. It insures increased compressive strength and tensile strength in bending, freeze resistance, waterproofing and corrosive resistance. The obtained positive results allow to reduce a compression zone width and a crack growth width. The paper can be useful for not only the transport construction but and for concrete obtaining with special properties at any fields.

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Lazaropoulos, Athanasios G. "Review and Progress towards the Common Broadband Management of High-Voltage Transmission Grids: Model Expansion and Comparative Modal Analysis." ISRN Electronics 2012 (December 27, 2012): 1–18. http://dx.doi.org/10.5402/2012/935286.

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The need of bridging the digital gap between underdeveloped/developed areas and promoting smart grid (SG) networks urges the deployment of broadband over power lines (BPL) systems and their further integration. The contribution of this paper is fourfold. First, based on the well-established hybrid model of (Lazaropoulos and Cottis 2009, 2010, Lazaropoulos, 2012) and the generic multidimensional network analysis tool presented in (Lazaropoulos 2012, Sartenaer 2004, Sartenaer and Delogne 2006, 2001) an exact multidimensional chain scattering matrix method, which is suitable for overhead high-voltage/broadband over power lines (HV/BPL) networks, is proposed and is evaluated against other theoretical and experimental proven models. Second, the proposed method investigates the overhead HV/BPL transmission grids (overhead 150 kV single-circuit, 275 kV double-circuit, and 400 kV double-circuit multiconductor structures) with regard to their end-to-end signal attenuation. It is found that the above features depend drastically on the overhead power grid type, the frequency, the MTL configuration, the physical properties of the cables used, the end-to-end distance, and the number, the length, and the terminations of the branches encountered along the end-to-end BPL signal propagation. Third, the impact of the multiplicity of the branches at the same junction in overhead HV grids is first examined. Based on the inherent long-branch structure and the quasi-static behavior of single/multiple branches with matched terminations of overhead HV grid, a simple approach suitable for overhead HV/BPL channel estimation is presented. Fourth, identifying the similar characteristics among different overhead HV/BPL configurations, an additional step towards the common overhead HV/BPL analysis is demonstrated; the entire overhead HV/BPL grid may be examined under a common PHY framework regardless of the overhead HV/BPL grid type examined. Finally, apart from the presentation of broadband transmission potential of the entire overhead transmission power grid, a consequence of this paper is that it helps towards: (i) the better broadband monitoring and management of overhead HV transmission power grids in an interactive SG network; and (ii) the intraoperability/interoperability of overhead HV/BPL systems under the aegis of a unified transmission/distribution SG power network.

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Alexandrov, G. N., V. A. Kashina, T. V. Lisochkina, and G. V. Podporkin. "Ecological Problems Associated with Overhead Electric Power Transmission and Possible Solutions." Energy Exploration & Exploitation 10, no. 6 (December 1992): 429–36. http://dx.doi.org/10.1177/014459879201000606.

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It is possible to use designs of overhead high voltage electricity lines which minimise environmental damage. The designs proposed from studies at St. Petersburg Technical University are outlined and the benefits given.

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Alexandrov, G. N., V. A. Kashina, T. V. Lisochkina, and G. V. Podporkin. "Tract of Vegetation as Means of Ensuring the Ecological Safety of Overhead Transmission Lines." Energy Exploration & Exploitation 12, no. 6 (December 1994): 439–65. http://dx.doi.org/10.1177/014459879401200606.

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It is possible to design ecological safe environments under high voltage overhead transmission lines. The experiments carried out in the USSR are described with considerable supporting technical detail.

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Rianna, Martha. "Management of Electric Field under the Sag of High Voltage Overhead Transmission Lines." Journal of Technomaterials Physics 2, no. 1 (February 28, 2020): 15–24. http://dx.doi.org/10.32734/jotp.v2i1.5261.

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There have been many methods used to determine the electric field strength under the 150 KV overhead transmission lines (OHTL). Since it is simple and can be used for a homogeneous and multilayer medium, the method chosen for modeling the electric field under the OHTL is the complex image method (CIM). The results obtained show that the electric field strength obtained by the CIM is in agreement with that obtained by Complex Determine Method (CDM). Furthermore, the results obtained from the CIM model fit well with the field data. The OHTL height that must be raised so that the electric field strength under the OHTL will meet the WHO quality standards is 3 m at location A and 2 m at location B. These results show that modelling the electric field under the OHTL using CIM is exellent.

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Elliott, Peter, David Wadley, and Jung Hoon Han. "Determinants of homeowners' attitudes to the installation of high-voltage overhead transmission lines." Journal of Environmental Planning and Management 59, no. 4 (May 26, 2015): 666–86. http://dx.doi.org/10.1080/09640568.2015.1035776.

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Deltuva, Ramūnas, and Robertas Lukočius. "Distribution of Magnetic Field in 400 kV Double-Circuit Transmission Lines." Applied Sciences 10, no. 9 (May 8, 2020): 3266. http://dx.doi.org/10.3390/app10093266.

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A high-voltage AC double-circuit 400 kV overhead power transmission line runs from the city of Elk (Poland) to the city of Alytus (Lithuania). This international 400 kV power transmission line is potentially one of the strongest magnetic field-generating sources in the area. This 400 kV voltage double-circuit overhead transmission line and its surroundings were analyzed using the mathematical analytical methods of superposition and reflections. This research paper includes the calculation of the numerical values of the magnetic field and its distribution. The research showed that the values of the magnetic field strength near the international 400 kV power transmission line exceed the threshold values permitted by relevant standards. This overhead power line is connected to the general (50 Hz) power system and generates a highly intense magnetic field. It is suggested that experimental trials should be undertaken in order to determine the maximum values of the magnetic field strength. For the purpose of mitigating these values, it is suggested that the height of the support bars should be increased or that any individual and commercial activities near the object under investigation should be restricted.

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Olivieri, Carlo, Francesco de Paulis, Antonio Orlandi, Giorgio Giannuzzi, Roberto Salvati, Roberto Zaottini, Carlo Morandini, and Lorenzo Mocarelli. "Remote Monitoring of Joints Status on In-Service High-Voltage Overhead Lines." Energies 12, no. 6 (March 14, 2019): 1004. http://dx.doi.org/10.3390/en12061004.

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This work presents the feasibility study of an on-line monitoring technique aimed to discover unwanted variations of longitudinal impedance along the line (also named “impedance discontinuities”) and, possibly, incipient faults typically occurring on high voltage power transmission lines, like those generated by oxidated midspan joints or bolted joints usually present on such lines. In this paper, the focus is placed on the application and proper customization of a technique based on the time-domain reflectometry (TDR) technique when applied to an in-service high-voltage overhead line. An extensive set of numerical simulations are provided in order to highlight the critical points of this particular application scenario, especially those that concern the modeling of both the TDR signal injection strategy and the required high-voltage coupling devices, and to plan a measurement activity. The modeling and simulation approach followed for the study of either the overhead line or the on-line TDR system is fully detailed, discussing three main strategies. Furthermore, some measurement data that were used to characterize the specific coupling device selected for this application at high frequency—that is, a capacitive voltage transformer (CVT)—are presented and discussed too. This work sets the basic concepts underlying the implementation of an on-line remote monitoring system based on reflectometric principles for in-service lines, showing how much impact is introduced by the high-voltage coupling strategy on the amplitude of the detected reflected voltage waves (also named “voltage echoes”).

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Рубцова, N. Rubcova, Токарский, A. Tokarskiy, Рябченко, V. Ryabchenko, Коновалов, and A. Konovalov. "Residual Voltage as a Possible Cause of Equipment Damage and Personnel Occupational Risk under Overhead Transmission Lines Outage. Part 1." Safety in Technosphere 6, no. 2 (August 21, 2017): 36–47. http://dx.doi.org/10.12737/article_598d793a1fdf59.44082216.

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To prevent substation equipment damage and to ensure safety of substation personnel under high voltage and extremely high voltage (EHV) overhead transmission line (TL) outage on the example of 500 kV TL outage voltages between switchable phase switch contacts are calculated. It is shown that under operating in the idle mode EHV TL outage, after arc clearing between switch contact connected to the phase at TL beginning and earth aperiodic voltage with the highest value exceeding the peak value of nominal phase voltage is created.The switch contact connected to the mains voltage, relative to the ground remains periodic nominal phase voltage. The resulting voltage between open contacts of the switch becomes aperiodic shifted periodic voltage with highest value exceeding the double peak value of nominal phase voltage that can cause breakdown of the switch. If there is a break switch phase, it will light the arc and switch under arc will go idle mode operating current, the voltage will recover to idle mode value, the current will stop, the arc goes out, aperiodic voltage will appear, etc. Such a process in a closed cycle can last a long time. Thus, output voltages high values can cause breakdown along the switches surface, damage to switches and health risk factor for the staff performing the bypass substation.

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E., OLUBAKINDE. "Reduction of corona losses on overhead power lines due to the use of modern wire designs." Journal of Electrical and power engineering 27, no. 2 (November 28, 2022): 58–62. http://dx.doi.org/10.31474/2074-2630-2022-2-58-62.

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The analysis of the conducted studies of the operation of high-voltage power lines (LEP) showed that the maximum power losses per corona are characteristic of increased voltages on high-voltage power lines with their low load, as well as in bad weather. Thus, a 5% increase in voltage at low line load leads to an increase in power losses per corona up to 30%. When it rains, power losses per corona for a 330 kV transmission line increase by 10 times compared to losses in good weather, for a 500 kV transmission line, the increase in losses is 12 times, and for a 750 kV transmission line - 13 times. During frost, the maximum power losses per crown are observed, which for a 330 kV transmission line increase by 23 times compared to losses in good weather, for a 500 kV transmission line, the increase in losses is 25 times, and for a 750 kV transmission line - 21 times. It should be noted that deterioration of weather conditions, in which there is an increase in corona power losses, is observed for more than 20% of the entire period of operation of the transmission lines during the year. Under such conditions, more than 80% of the total power losses per corona in the transmission line occur. The development and implementation of organizational and technical measures aimed at reducing power losses at the crown of power lines is an important practical task, the solution of which will contribute to increasing the efficiency of the electrical networks of Ukraine. Studying the possibility of influencing the amount of power losses due to the use of modern wire designs is an urgent task at the stage of designing power lines. The use of innovative brands of wires can lead to an increase in power losses per corona, due to their design features. Heat-shrinking films can be used to apply an insulating layer to sections of power lines, which will prevent corona and reduce losses associated with it. It is necessary to study the distribution of electric field strength along the span of the transmission line to determine the quantitative indicators of power losses per corona

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Lebedev, V. D., and Yu D. Kutumov. "Mathematical simulation of extra-high voltage overhead transmission lines for travelling-wave-based relay protection devices." Vestnik IGEU, no. 2 (2020): 40–50. http://dx.doi.org/10.17588/2072-2672.2020.2.040-050.

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The complexity of transient processes during travelling-wave propagation in extra high voltage overhead lines is deter-mined by the fact that many frequency components are presented in the electromagnetic wave front. For the correct analysis of the aforementioned transient processes and for further development of travelling-wave-based relay protec-tion and fault location devices, it is necessary to take into account the parameters of the environment where electromagnetic wave propagation occurs. For the transmission line, these parameters are longitudinal inductance, longitudinal resistance, shunt capacitance and shunt resistive conductance. It is worth mentioning that for a variety of reasons unit-area longitudinal inductance and resistance are the parameters which depend on frequency, thus travelling wave velocity is different for different frequency components of the electromagnetic wave front. The popular researches which address this problem either fail to consider the dependence of overhead line inductance and resistance on frequency or this dependence is considered approximately for the high-frequency range, which can cause significant errors in the transient processes analysis during travelling wave propagation. In view of this, the development of the approach to overhead transmission lines simulation, which will allow both determining the line parameters in a wide frequency range and evaluating steady-state behaviour and transient processes in long-distance transmission lines, arrears relevant. The main research method to establish extra-high voltage transmission line parameters employs the simulation study in COMSOL Multiphysics. A number of assumptions were made in the simulation process: homogeneous soil layer, entire transmission line section and absence of transmission line conductor sag. The usage of finite elements method (FEM) for differential equation solution in the above-mentioned software is also seen as an assumption. The approach to extra-high voltage transmission lines simulation has been offered. This approach consists of the usage of Maxwell’s equations in combination with numerical integration with finite elements method (FEM). Frequency response for transmission line parameters and travelling-wave propagation velocity rate for different frequency components have been obtained. The results obtained can be used in updating of electrical power system models for further research in the relay protection field. The suggested approach will allow evaluating line parameters of other voltage types and obtaining more accurate values of transmission line parameters and travelling wave propagation speed along transmission lines for high-frequency range. The use of these transmission line models will enable to formulate approaches to improve the existing algorithms of travelling-wave-based relay protection and fault location devices.

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Liu, Jiayang, Gongping Wu, Fei Fan, and Yuxin Li. "A Robot Hybrid Hierarchical Network for Sensing Environmental Variables of a Smart Grid." Sensors 20, no. 19 (September 26, 2020): 5521. http://dx.doi.org/10.3390/s20195521.

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With the rapid development of the social economy, high-voltage transmission lines as power supply infrastructure are increasing, subsequently presenting a new challenge to the effective monitoring of transmission lines. The dynamic sensor network integrated with robots can effectively solve the elastic monitoring of transmission lines, but the problems of real-time performance, energy consumption and economy of the network need to be solved. To solve this problem, a dynamic network deployment method based on the hybrid hierarchical network (HHN) is proposed to realize a low-cost, energy-saving and real-time dynamic sensing system for overhead high-voltage transmission lines. Through case analysis and simulation, combined with the vague set multi-attribute decision-making method (MADM) with scheme preference, the network deployment and optimization results under multi-parameter constraints are obtained.

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Dementyev, Sergei, and Pavel Kuteynikov. "Intelligent system for ice damage prevention on EHV overhead power lines." Energy Safety and Energy Economy 2 (April 2022): 5–11. http://dx.doi.org/10.18635/2071-2219-2022-2-5-11.

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Most of the damage on overhead transmission lines happens due to ice accumulation on conductors. This paper is devoted to ice damage prevention on extra high voltage split-phase overhead power lines. The key idea is using high-frequency heat up of wires instead of de-icing with power supply interruption. It is proven that keeping wire temperature at 0 °C is enough for the damage prevention purpose. The authors demonstrate the structure and description of the developed damage prevention system with adaptive control depending on climate conditions.

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Nassereddine, Mohamad, Jamal Rizk, Mahmood Nagrial, and Ali Hellany. "Counterpoise Mutual Voltage and Its Impacts on the HV Transmission UGOH Pole Earth Potential Rise." International Journal of Emerging Electric Power Systems 16, no. 3 (June 1, 2015): 233–41. http://dx.doi.org/10.1515/ijeeps-2014-0010.

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Abstract High-voltage earthing system design is required to ensure safety compliance and adequate operation of the high-voltage infrastructures. The transmission lines form a solid part of the high-voltage infrastructure. The underground to overhead (UGOH) pole earth grid is one of the main challenges when it comes to transmission line earthing system design. To ensure safety compliance at low cost, counterpoise earthing is used at the UGOH pole for the underground lines. The counterpoise aids in lowering the UGOH pole earth grid resistance. This paper addresses the counterpoise analysis as currently being studied. Furthermore, it introduces the counterpoise mutual voltage between the faulted phase and the counterpoise and its impact at the UGOH pole earth potential rise. Case study is included.

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Yamazaki, Shin, Shigeru Sokejima, Tetsuya Mizoue, Akira Eboshida, Michinori Kabuto, Naohito Yamaguchi, Suminori Akiba, Shunichi Fukuhara, and Hiroshi Nitta. "Association between high voltage overhead transmission lines and mental health: A cross-sectional study." Bioelectromagnetics 27, no. 6 (September 2006): 473–78. http://dx.doi.org/10.1002/bem.20227.

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Huang, Weibo, Guomin Luo, Mengxiao Cheng, Jinghan He, Zhao Liu, and Yuhong Zhao. "Protection Method Based on Wavelet Entropy for MMC-HVDC Overhead Transmission Lines." Energies 14, no. 3 (January 28, 2021): 678. http://dx.doi.org/10.3390/en14030678.

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Recent technological developments in modular multilevel converter-based high-voltage direct current (MMC-HVDC) transmission systems have shown significant advantages over the traditional HVDC and two-level voltage source converter (VSC) transmission systems. However, there are a lack of studies on the protection methods for MMC-HVDC overhead lines where the protection method should be able to provide a fast and accurate response and be able to identify lightning strikes. In this paper, a wavelet entropy-based protection method is proposed. Due to the capability of revealing time–frequency distribution features, the proposed protection method combines wavelet and entropy to identify the time–frequency characteristics of different faults. Simulation results show that the proposed method can accurately and quickly determine the types of faults or disturbances with appropriate noise tolerance. In addition, the impact of the ground resistor and fault distance on the performance of the proposed method is studied.

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Liao, Chunhui, Yinghu Yi, Tao Chen, Chen Cai, Zhiyang Deng, Xiaochun Song, and Cheng Lv. "Detecting Broken Strands in Transmission Lines Based on Pulsed Eddy Current." Metals 12, no. 6 (June 15, 2022): 1014. http://dx.doi.org/10.3390/met12061014.

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High-voltage transmission lines are the main facilities for power transmission, and they are mainly composed of aluminum conductor steel-reinforced (ACSR). Over long-term outdoor use, overhead transmission lines will encounter lightning strikes, chemical pollutant corrosion, deicing, wind vibration, and other external forces. This often results in a series of potential failures, such as breakage, for the strands. In order to ensure the safe operation of the power grid and avoid fatal accidents, such as line breaks, it is necessary to identify and repair line faults. Among them, the main basis for the regular detection and replacement of high-voltage transmission lines is whether a broken strand defect appears. In this paper, a type of pulsed eddy current (PEC) sensor is developed to detect the broken strand defect in transmission lines. The simulation and experimental results showed that the designed PEC sensor could effectively and accurately identify the fault.

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Wang, Hong Liang, Min Cao, Da Da Wang, Peng Li, and Shao Quan Zhang. "The Research and Design of Overhead Transmission Line Temperature Monitoring Technology Based on ZigBee." Advanced Materials Research 846-847 (November 2013): 578–82. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.578.

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Overhead transmission line temperature monitoring system for the protection of the safe operation of the transmission line is important, this paper introduces the ZigBee protocol level and the network topology, using the existing hardware platform designed and implemented programming ZigBee protocol stack, and then studied and designed based on ZigBee technologies overhead Transmission Lines temperature wireless data collection, gives the overall system architecture and hardware circuits, software systems, and do the experiment. After the unified information platform and experiment, the method is proved to be effective and feasible. The technology has high reliability, scalability, and low operating costs, especially for remote areas of Yunnan, China's high-voltage transmission line temperature monitoring.

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Xu, Ke Ju, Lei Yang, Da Da Wang, Chao Zhou, Shao Quan Zhang, Qing Jun Peng, and Xiao Ming Rui. "Parametrical Finite Element Modeling of Overhead Transmission Line-Towers System." Applied Mechanics and Materials 313-314 (March 2013): 809–12. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.809.

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With large-scale development of ultra high-transmission network, the structure of transmission line-towers system tends to the tower higher, the cross-section of transmission lines larger and span between towers longer. As the increasing of transmission lines voltage grade, transmission line-towers system has higher requirements on static and dynamic stability. It is difficult for traditional design method to meet the demands of new transmission line-towers, not to mention shorten the design cycle, improve design quality. In this paper, we establish overhead transmission line-towers system model based on parameterized finite element method, by gradually increasing the thickness of the icing, iced load, wind load, weight, mechanical properties under the action of the load and the conductor tension. The analysis results show that the model can effectively reflect the mechanical properties of the transmission towers, and improve the quality of the design, greatly shortening the design cycle.

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Ivanov, Dmitry, Marat Sadykov, Aleksandr Golenishchev-Kutuzov, Danil Yaroslavsky, Tatyana Galieva, and Amir Arslanov. "The application of the technology of sensor networks for the intellectualization of the overhead power transmission lines." E3S Web of Conferences 220 (2020): 01071. http://dx.doi.org/10.1051/e3sconf/202022001071.

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The length of overhead power transmission lines in the Russian Federation is over 2.8 million kilometers. Power grids are rapidly becoming obsolete. The level of deterioration of the equipment achieves 70% [1]. This leads to breakdowns on overhead power transmission lines and reduce the quality of electricity supply. One of the focus areas towards improving the situation is a deep modernization of the power grid with an orientation on energy efficiency. The purpose of this work is the creation a system for operative monitoring of the technical condition of high-voltage power-transmission lines based on modular devices. The modular device is configured depending on the issues at hand: control of ice formation; control of ice melting; localization of the place of short circuit, breakage, lightning strike; determination of electrical loads on the wire or control of the load of overhead power transmission lines; determination of mechanical loads at the wire suspension point; determination of conditions for the occurrence of ice formation, determination of defects in insulators. This will equip the overhead line diagnostic systems without serious financial costs by simple installation on the wire of the developed device which design allows to change the configuration of the equipment and solve a wide range of tasks.

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Tarko, Rafał, Konrad Kochanowicz, Wiesław Nowak, Waldemar Szpyra, and Tadeusz Wszołek. "Reduction of the Environmental Impact of Electric Field Generated by High Voltage Power Transmission Lines." Energies 14, no. 19 (October 6, 2021): 6388. http://dx.doi.org/10.3390/en14196388.

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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).

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Journal articles on the topic 'High Voltage Overhead Transmission Lines'

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