Electric and magnetic fields near power transmission lines as the function of temperature of wires

2016 ◽  
Vol 1 (11) ◽  
pp. 197-200
Author(s):  
Olgierd MAŁYSZKO
Keyword(s):  
Magnetic Fields ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Electric And Magnetic Fields

scholarly journals Electric and Magnetic Field Minimization using Optimal Phase Arrangement Techniques for MEA Overhead Power Transmission Lines

2021 ◽  
Vol 19 (1) ◽  
pp. 51-58
Author(s):  
Suthasinee Nunchuen ◽  
Vuttipon Tarateeraseth
Keyword(s):  
Magnetic Fields ◽  
Transmission Lines ◽  
Power Transmission ◽  
World Health ◽  
Power Transmission Lines ◽  
Electric And Magnetic Fields ◽  
Overhead Power Transmission Lines ◽  
Health Organization ◽  
The Mathematical Model ◽  
Phase Arrangement

In order to minimize the electric and magnetic fields generated by Metropolitan Electricity Authority (MEA) overhead power transmission lines, the optimal phase arrangement techniques were applied for 3-circuits overhead power transmission lines (69/230 kV). In this paper, the mathematical model was formulated using a MATLAB program which validated by comparing the simulated results with the measured results where the South Thonburi power transmission lines at Rama 2 Road (outbound side) were evaluated with the same conditions. Finally, it can be concluded that the optimal phase arrangement techniques can minimize the generated electric and magnetic fields lowering than that of the limitation given by the World Health Organization.

ESTIMATION OF THERMAL POWER PLANT WORKERS EXPOSURE TO MAGNETIC FIELDS AND SIMULATION OF HAZARD ZONES

2020 ◽  
Vol 190 (3) ◽  
pp. 289-296
Author(s):  
Majid Bagheri Hosseinabadi ◽  
Narges Khanjani ◽  
Mohammad Hossein Ebrahimi ◽  
Jamal Biganeh
Keyword(s):  
Power Plant ◽  
Magnetic Fields ◽  
Transmission Lines ◽  
Thermal Power Plant ◽  
Power Transmission ◽  
Thermal Power ◽  
Low Frequency ◽  
Exposure Level ◽  
Power Transmission Lines ◽  
Indoor Space

Abstract Extremely low-frequency magnetic fields (ELF-MFs) have raised some concerns due to their possible effects on workers’ health. In this study ELF-MFs were measured in different units of the thermal power plant based on gridding the indoor space. The exposure level was measured by spot measurement based on the IEEE Std C95.3.1 and then simulated in units with the highest magnetic field intensity by using ArcGIS software. The operators and balance of plant (BOP) technicians (12.64 ± 9.74 μT) and office workers (2.41 ± 1.22 μT) had the highest and lowest levels of both measured and estimated ELF-MFs exposure. The highest measured ELF-MFs were in the vicinity of the power transmission lines in the transformers’ building (48.2 μT). Our simulation showed the high and low exposure areas and ranked exposure well; but, the actual measurements of ELF-MFs exposure were in all cases higher than the estimated values, which means we still need to improve our estimations.

scholarly journals Control of EMI in High-Technology Nano Fab by Exploitation Power Transmission Method with Ideal Permutation

2021 ◽  
Vol 11 (24) ◽  
pp. 11984
Author(s):  
Yu-Lin Song ◽  
Manoj Kumar Reddy ◽  
Hung-Yi Lin ◽  
Luh-Maan Chang
Keyword(s):  
Magnetic Fields ◽  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Power Transmission ◽  
High Technology ◽  
Power Cable ◽  
Power Transmission Lines ◽  
Transmission Method ◽  
Additional Energy ◽  
The Ideal

There are many high-power electrical cables around and within semiconductor foundries. These cables are the source of extremely low-frequency (ELF < 300 Hz) magnetic fields that affect the tools which operate by the function of electronic beams. Miss operation (MO) happens because the ELF magnetic fields induce beam shift during the measurement or process for cutting-edge chips below 40 nm. We present the optimal permutation of power transmission lines to reduce electromagnetic influence in high-technology nano fabs. In this study, the magnetic field was reduced using a mirror array power cable system, and simulation results predicted the best permutations to decrease the electromagnetic interference (EMI) value to below 0.4 mG in a working space without any shielding. Furthermore, this innovative method will lower the cost of high-technology nano fabs, especially for the 28 nm process. The motivation behind this paper is to find the ideal permutation of power transmission lines with a three-phase, four-cable framework to decrease the EMI in high-technology nano fabs. In this study, the electromagnetic interference was diminished using the ideal-permutation methodology without investing or using additional energy, labor, or apparatus. Moreover, this advanced methodology will help increase the effectiveness and reduce the costs of nano fabs. The mathematical and experimental results of the study are presented with analysis.

scholarly journals Assessing the Health Risk Due to Exposure to Non-ionizing Radiation in the Form of Magnetic Field from Electrical Power Lines

2021 ◽  
Vol 9 (3) ◽  
pp. 72-77
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Ionizing Radiation ◽  
Electric Power ◽  
Current Density ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Electric Power Transmission Lines

We are all exposed to electromagnetic fields from electrical appliances, electric power transmission lines, distribution lines and power substations. This study was focused on investigating the possible risks to human health due to exposure to extremely low frequency varying magnetic fields from 330 kV, 132 kV, 33 kV and 11kV power lines in southeastern Nigeria. To determine the risks, a magnetic field meter was used to take measurements of magnetic flux from these power lines. From which, the induced current density due to exposure to varying magnetic fields was obtained using a model of the human body known as the prolate spheroid model. The maximum mean magnetic field and current density induced as obtained from the study were 4.790 µT and 0.04214 mA/m², which were obtained from the 330 kV power line. The study results are well below the reference levels of the International Commission for Non-Ionizing Radiation Protection, which are used for comparison, indicating that there is very low exposure risk to people living near these electric power transmission lines.

Sign in / Sign up

Export Citation Format

Share Document