Journal articles: 'HV overhead lines'

1

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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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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Lazaropoulos, Athanasios G. "Wireless Sensor Network Design for Transmission Line Monitoring, Metering, and Controlling: Introducing Broadband over Power Lines-Enhanced Network Model (BPLeNM)." ISRN Power Engineering 2014 (June 4, 2014): 1–22. http://dx.doi.org/10.1155/2014/894628.

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This paper introduces the broadband over power lines-enhanced network model (BPLeNM) that is suitable for efficiently delivering the generated data of wireless sensor networks (WSNs) of overhead high-voltage (HV) power grids to the substations. BPLeNM exploits the high data rates of the already installed BPL networks across overhead HV grids. BPLeNM is compared against other two well-verified network models from the relevant literature: the linear network model (LNM) and the optimal arrangement network model (OANM). The contribution of this paper is threefold. First, the general mathematical framework that is necessary for describing WSNs of overhead HV grids is first presented. In detail, the general mathematical formulation of BPLeNM is proposed while the existing formulations of LNM and OANM are extended so as to deal with the general case of overhead HV grids. Based on these general mathematical formulations, the general expression of maximum delay time of the WSN data is determined for the three network models. Second, the three network models are studied and assessed for a plethora of case scenarios. Through these case scenarios, the impact of different lengths of overhead HV grids, different network arrangements, new communications technologies, variation of WSN density across overhead HV grids, and changes of generated WSN data rate on the maximum delay time is thoroughly examined. Third, to assess the performance and the feasibility of the previous network models, the feasibility probability (FP) is proposed. FP is a macroscopic metric that estimates how much practical and economically feasible is the selection of one of the previous three network models. The main conclusion of this paper is that BPLeNM defines a powerful, convenient, and schedulable network model for today’s and future’s overhead HV grids in the smart grid (SG) landscape.

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Ahmed, Y., and S. M. Rowland. "U.K. Linesmen's Experience of Microshocks on HV Overhead Lines." Journal of Occupational and Environmental Hygiene 6, no. 8 (June 17, 2009): 475–82. http://dx.doi.org/10.1080/15459620902966737.

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5

Rabah, Djekidel, Sid Ahmed, and Samar Akef. "Accurate computation of magnetic induction generated by HV overhead power lines." Facta universitatis - series: Electronics and Energetics 32, no. 2 (2019): 267–85. http://dx.doi.org/10.2298/fuee1902267r.

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This paper proposes a 3D quasi-static numerical model for the magnetic induction calculation produced by the high voltage overhead power lines by using the Current Simulation Technique (CST) combined with the Particle Swarm Optimization Algorithm (PSO), in order to determine the appropriate position and number of the filamentary current loops for an accurate computation. The exact form of the catenary of the power line conductors is taken into account in this calculation. From the simulation results, the effect of the conductor sag is largely noticed on the magnetic induction distribution, especially at the mid-span length of the power line where the magnetic induction becomes very significant, the maximum magnetic induction strength at 1 m above the ground level recorded at mid-span point is 8.87 ?T, at the pylon foot, the maximum value is significantly reduced to 3.94 ?T. According to these values, we note that the limits set by the ICNIRP guidelines for magnetic induction strength are respected for occupational and public exposure. The simulation results of magnetic induction are compared with those obtained from the 3-D Integration method, a fairly good agreement is found.

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Rowland, Simon M., Konstantinos Kopsidas, and Ian Cotton. "Modeling of Currents on Long Span, Dielectric Cables on HV Overhead Lines." IEEE Transactions on Power Delivery 22, no. 2 (April 2007): 1138–44. http://dx.doi.org/10.1109/tpwrd.2007.893434.

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Djurić, M., K. Zorić, and N. Jejina. "Neural-network-based approach for secondary arc recognition on HV overhead lines." European Transactions on Electrical Power 9, no. 5 (September 1999): 309–12. http://dx.doi.org/10.1002/etep.4450090505.

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8

Krajewski, W. "3-D model of the electric field excited by overhead HV lines." Electrical Engineering 81, no. 1 (February 1998): 55–63. http://dx.doi.org/10.1007/bf01233057.

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9

Djekidel, Rabah, Sid Bessedik, and Abdechafik Hadjadj. "Assessment of electrical interference on metallic pipeline from HV overhead power line in complex situation." Facta universitatis - series: Electronics and Energetics 34, no. 1 (2021): 53–69. http://dx.doi.org/10.2298/fuee2101053d.

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Sharing corridors between high voltage alternating current (HVAC) power lines and metallic pipelines has become quite common. Voltages can be induced on pipelines from HV power lines, which may cause a risk of electric shock to the operator and serious corrosion damage on metallic pipelines. This paper aims to examine the capacitive coupling between aerial metallic pipelines and HV power lines in perfect parallelism case and in general situation which is formed by parallelism, approaches and crossings, using a combination of charge simulation method and Artificial Bee Colony (ABC) algorithm. The electric field at the pipeline's surface and the induced voltage on the pipeline are strongly affected by the pipeline separation distance. The presented simulation results are compared with those obtained from the admittance matrix analysis, a good agreement has been obtained.

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10

Pylarinos, D. "Overhead Transmission Line Easement and Right-of-Way Cases in Crete, Greece: A Statistical Analysis of 1220 Cases from 1974 to 2019." Engineering, Technology & Applied Science Research 10, no. 3 (June 7, 2020): 5581–89. http://dx.doi.org/10.48084/etasr.3591.

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Overhead Transmission Lines (OTLs) are used to carry High Voltage (HV) between HV substations, usually constructed at long distances from each other, thus spanning across numerous different properties. Easements, a legal term for nonpossessory rights, are essential to the utilities in order to maintain a Right-Of-Way (ROW) for construction and maintenance purposes in a corridor of land underneath the lines, and also to enforce certain restrictions within that corridor, in order to ensure the safety of both the OTLs and the public. The exact details of ROW corridors’ management vary between countries as the legislation and each utility’s approach may differ. This paper focuses on 1220 easements/ROW cases regarding the isolated HV Transmission System of the Greek island of Crete from 1974 to 2019. The various related factors are discussed and a statistical analysis of the records is performed.

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11

Krajewski, W. "BEM analysis of electric field excited by overhead HV lines erected in built-up areas." IEE Proceedings - Science, Measurement and Technology 144, no. 2 (March 1, 1997): 81–86. http://dx.doi.org/10.1049/ip-smt:19970858.

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12

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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Nassereddine, Mohamad, Jamal Rizk, Mahmood Nagrial, and Ali Hellany. "Induced Voltage Behavior on Pipelines Due to HV AC Interference: Effective Length Concept." International Journal of Emerging Electric Power Systems 16, no. 2 (April 1, 2015): 131–39. http://dx.doi.org/10.1515/ijeeps-2014-0009.

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Abstract High-voltage infrastructure upgrade is expending due to the growth in populations. To save on easement cost and to reduce the environmental impact of these projects, HV transmission lines occupy the same easement as pipelines in many cases. This joint easement introduces the AC interference between transmission lines and pipelines. The induced voltage can reach a limit which will jeopardize the human safety. The cited research studies the induced voltage under the presence of the overhead earth wire (OHEW) using the shielding factor. The work in this paper studies the induced voltage using the OHEW section current along with the superposition theorem. The simulations are compared to the existing research methods. The case study along with the theoretical study discusses the advance accuracy of the proposed method over the existing shield factor used in the presence research. Furthermore, they introduce the effective length along with the effective shielding factor, which aids in computing the additional effect that the OHEW has on the induced voltage.

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14

Joedo, Lolita Adhyana. "Peningkatan Batas Aman Induksi Elektromagnetik Saluran Udara Tegangan Ekstra Tinggi (SUTET) 500 kV Bagi Kesehatan Manusia Berdasarkan Peraturan Menteri ESDM No. 18 Tahun 2015 Juncto No. 2 Tahun 2019." KILAT 9, no. 1 (April 25, 2020): 49–56. http://dx.doi.org/10.33322/kilat.v9i1.780.

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The Development of Extra High Voltage (EHV) overhead power lines ( SUTET 500 kV) has become a national issue because based on several studies worldwide that shown residents who living next to power lines could increase the risk of their health problems. Therefore, there were huge protests from residents in Singosari and Gresik in 1991. The protest also happened in 2004, in which residents from Sumedang, Bogor, Cianjur, and Majalengka marching to Presidential Palace in Jakarta altogether. As a consequence, PLN and Faculty of Engineering of Gajah Mada University in 2005 developed collaborative research to identify HV and EHV required clearance of distance. This research refers to the WHO standard which determines the maximum of magnetic and electric field allowed, also refers to the Ministry of Mineral and Energy Resources Regulation No.01.P/47/M.PE/1992 which determines the minimum clearance distance between HV/ EVH bottom conductor with the ground as the safety levels concerning human exposure to electromagnetic fields. As the enactment regulation of the Ministry of Mineral and Energy Resources No. 18 of 2018 and its amendment No.2 of 2019, the regulation of HV, EHV, and also HVDC (High Voltage – Direct Current) free space and required clearance distance is determined. This research describes the comparison between PLN-UGM collaborative research with both Ministry regulation mentioned above.

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Ippolito, Mariano, Fabio Massaro, and Rossano Musca. "Improving Angle Stability by Switching Shunt Reactors in Mixed Overhead Cable Lines. An Italian 400 kV Case Study." Energies 12, no. 7 (March 27, 2019): 1187. http://dx.doi.org/10.3390/en12071187.

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Stringent environmental constraints make the construction of new transmission overhead lines more and more difficult. Alternatively, today it is possible to use cable lines for high (HV) and extra-high (EHV) voltage systems. The configuration of the so-called mixed lines can create some problems in the operation of the electrical system, both during steady-state and transient conditions. In particular, the system stability is one of the main concerns when analyzing the dynamic response of power systems. In this paper, the study of angular stability of a system containing a mixed line is presented: a specific control logic applied to the shunt reactors of the mixed line is proposed as improvement of the overall system stability. The proposed switching logic is first discussed from a theoretical point of view and validated with two different testing systems. Then, the existing overhead-cable lines connecting Sicily to the rest of continental Europe 400 kV power system are taken as case study for the application of the proposed switching strategy. Several simulations are performed in the power system analysis software NEPLAN360: the results show the fundamental role of the timing of the control actions applied on the shunt reactors in helping the system to keep the stability. The proposed control proves to be an effective support to the system subjected to critical contingencies, contributing decisively to avoid the angular separation between areas and therefore to preserve the stability of the system.

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16

Djekidel, R., and S. A. Bessedik. "ASA Algorithm Combined with Current Simulation Method (CSM) for the Magnetic Induction under HV Power Lines in 3D Analysis Model." Advanced Electromagnetics 9, no. 2 (August 28, 2020): 7–18. http://dx.doi.org/10.7716/aem.v9i2.1345.

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In this paper, a new hybrid approach to modeling the magnetic induction produced by HV overhead power line which combines the current simulation method (CSM) and adaptive simulated annealing algorithm (ASA) is discussed. The aim of the ASA algorithm is to find the optimal position and number of current loops used in bundles conductors for an accurate magnetic induction. Several parameters affecting the magnetic induction have been studied; it is observed that, taking into account the effect of conductor sag is much more interesting particularly at the mid-span length where the magnetic induction becomes very significant, the results also indicated that the maximum magnetic induction levels are less than the limits recommended by the ICNIRP standard for general public and occupational exposure. The calculated results are compared with those obtained from the COMSOL 4.3a Multiphysics software. A good agreement has been reached.

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17

Lazaropoulos, Athanasios G. "Towards Modal Integration of Overhead and Underground Low-Voltage and Medium-Voltage Power Line Communication Channels in the Smart Grid Landscape: Model Expansion, Broadband Signal Transmission Characteristics, and Statistical Performance Metrics (Invited Paper)." ISRN Signal Processing 2012 (October 16, 2012): 1–17. http://dx.doi.org/10.5402/2012/121628.

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The established statistical analysis, already used to treat overhead transmission power grid networks, is now implemented to examine the factors influencing modal transmission characteristics and modal statistical performance metrics of overhead and underground low-voltage/broadband over power lines (LV/BPL) and medium-voltage/broadband over power lines (MV/BPL) channels associated with power distribution in smart grid (SG) networks. The novelty of this paper is threefold. First, a refined multidimensional chain scattering matrix (TM2) method suitable for overhead and underground LV/BPL and MV/BPL modal channels is evaluated against other relative theoretical and experimental proven models. Second, applying TM2 method, the end-to-end modal channel attenuation of various LV/BPL and MV/BPL multiconductor transmission line (MTL) configurations is determined. The LV/BPL and MV/BPL transmission channels are investigated with regard to their spectral behavior and their end-to-end modal channel attenuation. It is found that the above features depend drastically on the frequency, the type of power grid, the mode considered, the MTL configuration, the physical properties of the cables used, the end-to-end distance, and the number, the electrical length, and the terminations of the branches encountered along the end-to-end BPL signal propagation. Third, the statistical properties of various overhead and underground LV/BPL and MV/BPL modal channels are investigated revealing the correlation between end-to-end modal channel attenuation and modal root-mean-square delay spread (RMS-DS). Already verified in the case of overhead high-voltage (HV) BPL systems, this fundamental property of several wireline systems is also modally validated against relevant sets of field measurements, numerical results, and recently proposed statistical channel models for various overhead and underground LV/BPL and MV/BPL channels. Based on this common inherent attribute of either transmission or distribution BPL networks, new unified regression trend line is proposed giving a further boost towards BPL system intraoperability. A consequence of this paper is that it aids in gaining a better understanding of the range and coverage that BPL solutions can achieve; a preliminary step toward the system symbiosis between BPL systems and other broadband technologies in an SG environment.

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18

Krajewski, W. "3-D model of the electric field excited by overhead HV lines (Dreidimensionales Modell des von Hochspannungs-Freileitungen erzeugten elektrischen Feldes)." Electrical Engineering (Archiv fur Elektrotechnik) 81, no. 1 (February 26, 1998): 55–63. http://dx.doi.org/10.1007/s002020050022.

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19

Lech, Michał. "DISASSEMBLABLE VACUUM CHAMBER AS AN INNOVATIVE TEST STAND DESIGNED FOR RESEARCH ON IMPROVING THE OPERATIONAL PARAMETERS OF POWER SWITCHING APPARATUS." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 10, no. 3 (September 30, 2020): 66–69. http://dx.doi.org/10.35784/iapgos.1922.

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Polish power industry is characterized by outdated elements and in poor technical condition. This applies mainly to overhead lines operating at medium and high voltage (MV and HV) levels. Moreover, the Energy Regulatory Office (ERO) requires the Distribution System Operators to supply electricity with specified parameters, ensuring uninterrupted electricity supply to end users. Failure to meet these conditions results in specific financial penalties. In connection with with the above, there is a strong need to upgrade the existing electricity grids using modern equipment. The article presents an innovative, original research position based on the so-called dismountable vacuum chamber, which allows to conduct research on improving the performance of modern switching equipment used in Smart Grid networks. The article also presents the results of the electric strength tests of the inter-contact break in order to confirm the correctness of operation of the described test stand.

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20

Frigura-Iliasa, Mihaela, Felicia Ioana Baloi, Flaviu Mihai Frigura-Iliasa, Attila Simo, Sorin Musuroi, and Petru Andea. "Health-Related Electromagnetic Field Assessment in the Proximity of High Voltage Power Equipment." Applied Sciences 10, no. 1 (December 29, 2019): 260. http://dx.doi.org/10.3390/app10010260.

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With respect to health issues, this paperpresents the results of an electromagnetic field (EMF) assessment in the proximity of a high voltage power station located in South Transylvania, Romania. The main parameters taken into account are, according to all standards and recommendations, the RMS (Root Mean Square) value of low frequency (0–300 Hz) electrical field strength E (in kV/m) and magnetic flux density B (in µT). Measurements were performed near all critical pieces of equipment (transformers, switches, busbars, overhead lines), according to the EMF European Directive. Some measurements were made as a function of distance from the HV (high-voltage) equipment, others as a time variation. The main objective was to verify that specific limits are met and, if necessary, to identify protective measures. Finally, safe exposure times for personnel operating at these sites were determined. In the future, detailed maps of EMF variations will be made available to the power companies.

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Journal articles on the topic 'HV overhead lines'

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