Simple Approximation of the Magnetic Induction Inside High Voltage Overhead Transmission Lines (original) (raw)
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Effect on Human Body of the Magnetic Field Induced by the High Voltage Transmission Line
European Journal of Electrical Engineering, 2021
The quality of electrical energy and the fight against energy losses are a crucial issue for electricity companies. The use of high voltage lines can limit energy losses for the transmission of electricity over long distances. But this solution has the disadvantage of the propagation of the electromagnetic wave which has a great influence on human health. The work presented in this study mainly deals with modelling problems that may be encountered by the community working in the field of low frequency electromagnetic fields. In order to model a power line, we are based on geometric data as well as phase and earth conductor data.
Experimental and Modeling of Electromagnetic Environment in the Vicinity of High Voltage Power Lines
Safety and Health at Work, 2015
Background: This work presents an experimental and modeling study of the electromagnetic environment in the vicinity of a high voltage substation located in eastern Algeria (Annaba city) specified with a very high population density. The effects of electromagnetic fields emanating from the coupled multilines high voltage power systems (MLHV) on the health of the workers and people living in proximity of substations has been analyzed. Methods: Experimental Measurements for the Multi-lines power system proposed have been conducted in the free space under the high voltage lines. Field's intensities were measured using a referenced and calibrated electromagnetic field meter PMM8053B for the levels 0 m, 1 m, 1.5 m and 1.8 m witch present the sensitive's parts as organs and major functions (head, heart, pelvis and feet) of the human body. Results: The measurement results were validated by numerical simulation using the finite element method and these results are compared with the limit values of the international standards. Conclusion: We project to set own national standards for exposure to electromagnetic fields, in order to achieve a regional database that will be at the disposal of partners concerned to ensure safety of people and mainly workers inside high voltage electrical substations.
The purpose of this study was to investigate potential health concerns linked to electromagnetic field (EMF) exposure from high-voltage power lines and develop a thorough knowledge of the underlying mechanisms causing these effects. The study looks into how Specific Absorption Rate (SAR) varies, how temperatures are distributed, and how these things affect people's health when they are close to electricity grid lines. The discretization finite difference approach was employed in this study to describe the electromagnetic waves, absorption rate, and temperature. The findings show that there is a considerable variation in SAR values, from 0.0000 to 0.0072 W/kg, and that as distance from the grid increases, SAR decreases from 1.0 to 0.0 W/kg. The study also shows that stronger electric fields cause temperatures to rise close to grid lines. These results highlight the significance of comprehending and reducing possible health concerns related to electromagnetic field exposure close to electricity infrastructure. To reduce exposure and safeguard public health, it is advised that regulatory rules, public awareness campaigns, and urban planning efforts be implemented in light of the observed variability of surface radiation and temperature swings. Effective solutions to safeguard the safety of people living and working near electrical grid lines must be implemented in concert with government agencies, utility companies, healthcare providers, and community groups. Stakeholders can create knowledgeable policies and practices to encourage safer living conditions and lessen the possible negative impacts of electromagnetic field exposure on human health by considering these findings.
Facta universitatis - series: Electronics and Energetics, 2005
In this paper the analytical calculus and the experimental measurements of the electric and magnetic field around a high voltage 400KV electrical overhead lines has been analyzed. There have been analyzed the possible influences of the electromagnetic field on the health of the human beings. The calculus has been done using the MatLab medium, the experimental measurements of the electric strength have been done using a spherical dipole.
Evaluation and measurement of magnetic field exposure over human body near EHV transmission lines
Electric Power Systems Research, 2005
Power frequency (50/60 Hz) magnetic field exposure still draws the attention of many researchers worldwide to investigate its harmful effects on living bodies. In light of this attention, as the population increases, the overlap between the power transmission lines and the settlement areas causes a problem (as in the case of exposure in random, residential, commercial and other areas, which lie very near or under the power transmission lines). In this paper, the power frequency magnetic fields, over a human body, at different positions, near extra high voltage (EHV) transmission lines are demonstrated, both analytically and practically. For the analytical part, the human body is approximately simulated as a parallelepiped. Two different positions for a human are selected near 500 and 220 kV power transmission lines. The magnetic field intensity along the vertical center line of the human is calculated. The effects of two different line configurations (for 220 and 500 kV power systems) and human positions, with respect to the transmission line, are considered. The paper also presents the actual practical magnetic field values measured near actual power transmission lines (220 and 500 kV) using a magnetic field measuring instrument. These transmission lines represent parts of the transmission network of the Egyptian united power system, near Cairo and El-Asher of Ramadan, under the actual loads. The results obtained, from the analytical studies and practical measurements, are compared with the international standards of the magnetic field exposures.
Environmental pollution by magnetic field associated with power transmission lines
Energy Conversion and Management, 2002
Power frequency (50/60 Hz) magnetic field exposure still draws the attention of many researchers worldwide to investigate its harmful effects on living bodies. In light of this attention, as the population increases, the overlap between the power transmission lines and the settlement areas causes a problem (as in the case of exposure in random, residential, commercial and other areas, which lie very near or under the power transmission lines). In this paper, the power frequency magnetic fields, over a human body, at different positions, near extra high voltage (EHV) transmission lines are demonstrated, both analytically and practically. For the analytical part, the human body is approximately simulated as a parallelepiped. Two different positions for a human are selected near 500 and 220 kV power transmission lines. The magnetic field intensity along the vertical center line of the human is calculated. The effects of two different line configurations (for 220 and 500 kV power systems) and human positions, with respect to the transmission line, are considered. The paper also presents the actual practical magnetic field values measured near actual power transmission lines (220 and 500 kV) using a magnetic field measuring instrument. These transmission lines represent parts of the transmission network of the Egyptian united power system, near Cairo and El-Asher of Ramadan, under the actual loads. The results obtained, from the analytical studies and practical measurements, are compared with the international standards of the magnetic field exposures.
Numerical Calculation of Internal Induced Fields in Humans Due to High Voltage Transmission Lines
Acta Electrotechnica et Informatica, 2014
Interaction of extremely low frequency (ELF) electromagnetic fields (EMF) with human has been a great concern over the previous years for researchers. ELF EMFs emanating from high voltage transmission lines interact with human by inducing electric fields internally in body. Various studies have shown the ill effects of this interaction on human organism. In this paper, numerical calculations of internally induced electric field and current density in human of different gender and age are done. Maximum values of external electric and magnetic fields are estimated from the detailed survey carried out on 132 kV high voltage transmission line. Human body is a complex structure comprising of several tissues with varying values of conductivity and relative permittivity. It is very difficult to describe the interaction of external fields with every single tissue and no direct method is available for measurement of internally induced fields. Internal fields are estimated with the help of homogeneous ellipsoid model. The total induced electric field and current density due to combined effect of external electric and magnetic field is calculated. Results obtained are compared with recommended exposure levels.
The increase in electricity consumption, population, and land use has now forced high voltage transmission lines (HVTLs) either to pass or be installed around or through urban cities. This increases the level of human exposure to electromagnetic field radiation as this field produced around the HVTLs extends outwards covering some distance. This may cause a number of health hazards. It is even dangerous to a human who touch any metallic object in proximity of the HVTL, as it may have an appreciable voltage induced on it due to inductive, capacitive or resistive interference from the line. This paper evaluates the magnetic field produced at mid-span by a 132kV, and a 330kV, 50Hz adjacent HVTLs with horizontal and vertical configuration in Akure, a city in South Western Nigeria using analytical method from electromagnetic field theory. This is then compared to the recommended standard limit of public exposure to magnetic field. The results of the computation showed that currently, the general public exposure to the magnetic field along the HVTLs is safe. However, right of way (ROW) along the power lines is being violated as buildings and work places exist within the ROW. Keywords-health hazard, high voltage transmission lines, limit of public exposure, magnetic flux density, right of way.
Experimental Study of Electromagnetic Environment in the Vicinity of High Voltage Lines
American Journal of Engineering and Applied Sciences, 2011
Problem statement: Several studies have investigated the impact of electromagnetic field generated by high voltage power lines on environment. The evaluation of electric and magnetic field quantities are of paramount interest in the characterization of electromagnetic environment of the proposed line. The purpose of this study was to analyze the behavior of electromagnetic fields generated by power lines in an area of strong population. Approach: The method applied in this study was gradual; examined the effects of different couplings between the different neighboring lines on behavior of electric and magnetic fields. Later, these lines will be used as a source of disturbance applied to the auditory implants EMC. Results: The implications of experimental results were also compared and discussed with new standard. Conclusion: The maximum intensities of electric and magnetic fields measured for the circuit of three lines close to each other, within the El-HADJAR substation were significantly lower than the ICNIRP reference levels for occupational and no occupational exposures.
Journal of Electrical and Electronic Engineering, 2014
In this paper we present a modeling and simulation, the methodology for calculating the electromagnetic field radiated by the high voltage (HV) lines and for selection of analytical models that interpret the electric and magnetic fields as a function of the distance to the target object. The results were compared with measurements carried out on site where the HV lines are present through a neighborhood of a large agglomeration in the city of Tebessa, for over 50 years. Following published standards establishing the human to HV power line distances for professional exposure or in the case of low frequency field exposure the results obtained by calculations /simulation and measurement in this work, enable us to recommend possible solutions for the electromagnetic pollution issues in the town of Tebessa and thus to reduce the permanent danger to the public considering also the legislative vacuum and the poor preoccupation of official authorities.