Electromagnetic Field, in a High Frequency Range, of High-Voltage Transmission Lines and Its Effects on the Response of a Terminated One-Wire Transmission Line Set Near the Ground

1976 ◽  
Author(s):  
J.M. Fontaine ◽  
J.L. Faure ◽  
C. Gary
Keyword(s):  
Electromagnetic Field ◽  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
High Frequency ◽  
High Frequency Range ◽  
Frequency Range ◽  
High Voltage Transmission

scholarly journals Usage of low-energy electromagnetic fields of marginal high-frequency range for reconstruction of the injured by infectious microorganisms animal skin

2019 ◽  
Vol 10 (7) ◽  
pp. 739
Author(s):  
Taras Hutsol ◽  
Volodymyr Ivanyshyn ◽  
Serhii Yermakov ◽  
Serhii Komarnitskyi
Keyword(s):  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
High Frequency ◽  
Theoretical Aspect ◽  
Mathematic Model ◽  
Low Energy ◽  
High Frequency Range ◽  
Frequency Range ◽  
Skin Cover ◽  
Animal Skin

The paper is concerned with the mechanism of interaction between the electromagnetic field and the microorganisms. Currently the issue for usage of low-energy electromagnetic fields of marginal high-frequency range for reconstruction of the injured by infectious microorganisms animal skin is of great interest. The use of low-energy electromagnetic fields for restoring animal skin cover is significantly different from the existing physical and therapy procedures.The authors made the theoretical and the experimental research on updating and developing the low-energy electromagnetic technology and hardware of the electromagnetic field of high-frequency range to restore animal skin cover of infected wounds.The process of interaction between low-energy electromagnetic fields of high-frequency range in terms of infected animal skin cover is examined on the basis of the mathematic model. Particular attention was paid to theoretical aspect and cellular level analysis of the biotronic parameters of electromagnetic fields for the oppression of infectious microorganisms in wounds of animal skin cover and its effective reunion.

Development of C.B.T Hot End Yoke Device for Hot Line Insulator Replacement of 230-kV Double Suspension String for Two Bundles with Arcing Horn

2014 ◽  
Vol 931-932 ◽  
pp. 862-866
Author(s):  
Charoenchai Kajonwattanakul ◽  
Wanwisa Skolpap
Keyword(s):  
Power Plant ◽  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
Electrical Energy ◽  
Initial Letter ◽  
Corrective Maintenance ◽  
Maintenance Time ◽  
Central Regions ◽  
High Voltage Transmission

Electrical energy generating from power plant is transmitted to electrical substations via high-voltage transmission lines. After a certain period time of use, the transmission line is required for maintenance such as insulator replacement. To avoid power interruption during insulator replacement, a corrective maintenance, hot line maintenance, is performed. This research focused on the hot line insulator replacement of 230 kV Bangsapan-Chumporn and 230 kV Chumporn-Suratthani transmission lines transferring power between southern and central regions of Thailand. The maintenance of 230 kV double suspension string for two bundles with arcing horn required developed C.B.T. hot end yoke tool to enhance stability and availability of electrical energy during hot line insulator replacement. C.B.T was named by the initial letter of the name of Chumporn Bandon and Takuapa transmission lines under authorization of the maintenance section in responsible maintaining service of transmission lines in upper southern provinces. The developed C.B.T hot end yoke device for hot line insulator replacement could save about 2.67 million bahts during 7-hour of maintenance time of EGAT payment.

Research on Electromagnetic Energy Absorbed by Human Body in the Vicinity of High-Voltage Transmission Line

2014 ◽  
Vol 1022 ◽  
pp. 155-158
Author(s):  
Ao Wang ◽  
Zi Wei Chen ◽  
Rui Guan ◽  
Yu Hui Zhu ◽  
Lian Qing Zhao
Keyword(s):  
Electromagnetic Field ◽  
High Voltage ◽  
Transmission Lines ◽  
Field Energy ◽  
High Voltage Transmission Line ◽  
The People ◽  
High Voltage Transmission ◽  
Ac Transmission ◽  
Electromagnetic Field Energy ◽  
Uhv Transmission Lines

When the building is located near high-voltage transmission lines, the people working or living in the building will absorb a certain amount of electromagnetic field energy. When the limit is exceeded, it will have an impact on human health. We studied people in surrounding buildings of 500kV EHV AC transmission lines and 1000kV AC UHV transmission lines and discussed electromagnetic field energy they absorbed.

scholarly journals A Time-Domain Explicit Integration Algorithm for Fast Overvoltage Computation of High-Voltage Transmission Line

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Lei Zhang ◽  
Zhongyi Xu ◽  
Jing Ye
Keyword(s):  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
Multiple Time ◽  
Explicit Integration ◽  
Time Step ◽  
Integration Algorithm ◽  
High Voltage Transmission Line ◽  
High Voltage Transmission ◽  
Explicit Integration Algorithm

This paper presents a multiple time-step solver based on a time-domain explicit integration algorithm for improving the computational speed of high-voltage transmission line electromagnetic transient (EMT) simulation. For weakly rigid EMT models of high-voltage transmission lines, the previous precise Runge-Kutta integration method with a small time step is adopted; for strongly rigid nonlinear EMT models of high-voltage transmission lines, a an improved precise integration method using a large time step is used for the solver of EMT simulation. Practical simulations for overvoltages of high-voltage transmission line show that multiple time-step EMT solver can be applied to different cases of EMT simulation for transmission line.

Research and Application of Optical Fiber Sensing Technology on High Voltage Transmission Line Monitoring

2013 ◽  
Vol 462-463 ◽  
pp. 59-63 ◽  
Author(s):  
Hong Lei Yang ◽  
Shi Bin Liang ◽  
Xue Peng Miao ◽  
Min Cao ◽  
Ming Chang
Keyword(s):  
Optical Fiber ◽  
Transmission Line ◽  
High Voltage ◽  
Transmission Lines ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
On Line ◽  
High Voltage Transmission ◽  
Transmission Line Monitoring

On-line monitoring of high voltage transmission lines can prevent or reduce the accidents of transmission reduced by icing,wave,breeze vibrations of electric wires and the dropping of electrical insulators.An on-line monitoring system of high voltage transmission lines based on optical fiber sensing technology is setted in this paper.Fiber optic signal demodulation instrument in the transformer substation receives the signal sent by the optical fiber Bragg grating sensors fitted on transmission lines and electric power towers,and then the signal was sent to the transmission line monitoring center by the power system network.Field hang net experiments shows that the system can monitor the high voltage transmission lines accurately for a long time.

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