scholarly journals Analysis of power frequency electric field distortion caused by substation inspection robot

2021 ◽  
Vol 2121 (1) ◽  
pp. 012017
Author(s):  
Quanquan Gong ◽  
Yunqi Li ◽  
Zhongju Yang ◽  
Dandan Dou ◽  
Fan Yang ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Three Dimensional ◽  
Inspection Robot ◽  
Distortion Coefficient ◽  
Field Distortion ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
Inspection Robots

Abstract In the era of intellectualization, many substation inspection robots are being put into operation, but they will cause electric field distortion in the surrounding space during operation. This paper establishes a three-dimensional simplified simulation calculation model for 500kV substations and inspection robots. Based on the boundary element method, we simulate the power frequency electric field of the substation switchyard and analysis the distortion electric field when the inspection robot is in the station. The results show that when the electric field intensity is strong, the distortion coefficient caused by the robot will be larger, and the maximum can reach 2.25 times, and when the electric field intensity is small, the distortion coefficient will be smaller, and the distortion coefficient is 1.42 times on average.

Influence of temperature and humidity on power frequency electric field intensity

2018 ◽  
Vol 191 (1) ◽  
pp. 104-110
Author(s):  
Chunping Yang ◽  
Wenbin Zhang ◽  
Nianrong Zhou ◽  
Lijun Tang ◽  
Tianwen Li
Keyword(s):  
Electric Field ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Influence Of Temperature ◽  
Temperature And Humidity ◽  
Power Frequency ◽  
Frequency Electric Field

Prediction Model of Power Frequency Electric Field Intensity of Typical Transmission Line

2013 ◽  
Vol 448-453 ◽  
pp. 328-331
Author(s):  
Xin Zhao ◽  
Tao Chen ◽  
Wei Wang ◽  
Yan Hong Huang Fu
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Field Intensity ◽  
High Voltage ◽  
Electric Field Intensity ◽  
Electromagnetic Compatibility ◽  
High Voltage Transmission Line ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
High Voltage Transmission

The power frequency electric field and Electric radiation generated by high voltage transmission line have a great impact on the surrounding environment, which is one of the important research topic on environmental protection and electromagnetic compatibility technology field. In this paper, the information database of typical transmission line and tower established,and the prediction of power frequency electric field intensity of high voltage transmission line has been given by using the 3-D computational method.Then, the major factors affecting the calculation results of electric field is discussed based on the measured data and the error analysis is given.

Analysis and Calculation of Substation’s Internal Electric Field Intensity Caused by Incoming and Outgoing Lines

2013 ◽  
Vol 291-294 ◽  
pp. 2428-2431
Author(s):  
Hui Lan Jiang ◽  
Kai Zeng ◽  
Jian Min Liu ◽  
Chao Li
Keyword(s):  
Genetic Algorithm ◽  
Electric Field ◽  
Field Intensity ◽  
High Voltage ◽  
Electric Field Intensity ◽  
Transmission System ◽  
Three Phase ◽  
Power Frequency ◽  
Limited Length ◽  
Frequency Electric Field

In ultra-high voltage transmission system, the electrostatic induction generated by power frequency electric field will exerts negative effects on the electrical automation equipment within the substation and, in particular, will leads long-term harm to staffs’ health. However, researches of electric field environment in ultra-high voltage transmission system merely concentrate on calculating the electric field intensity caused by three-phase limited length wire or three-phase infinite wire within the transmission, without considering the method of calculating half-infinite wire which represents “one end is fixed, while the other end is infinite length’s wire”. Consequently, a new method named “Charge Simulation-Genetic Algorithm (CS-GA) method” which can efficiently calculate power frequency electric field inside of the substation is proposed in the paper. In CS-GA method, the effective calculating length is determined by genetic algorithm method’s optimization, which in other words, half-infinite length wire is substituted for limited length wire in calculating the electric field intensity. The simulation results indicate that CS-GA method is a relatively accurate, efficient and reasonable way on calculating the power frequency electric field inside of the substation.

The Experimental Study on the Influence of Human Body to Measurement of High Voltage Power Frequency Electric Field

2013 ◽  
Vol 303-306 ◽  
pp. 482-488
Author(s):  
Kai Mao ◽  
Jin Gang Wang ◽  
Xu Dong Deng ◽  
Wei He ◽  
Zuo Peng Zhang
Keyword(s):  
Electromagnetic Field ◽  
Electric Field ◽  
Electric Fields ◽  
High Voltage ◽  
Human Body ◽  
Enhancement Factor ◽  
Electric Field Distribution ◽  
Field Distortion ◽  
Power Frequency ◽  
Frequency Electric Field

Based on the basic theory of electromagnetic field, the Electric Field Distortion (EFD) in power frequency electric field caused by induced current of human body has been analyzed. The enhancement factor of the electric field distortion is introduced to reduce the influences caused by human body in the measurement of high voltage electric fields. The Ansoft Maxwell is used to simulate and calculate the electric field distribution under the influence of the human body to have the value of enhancement factor. In addition, the enhancement factor has been corrected by experiment with the electromagnetic field analyzer EFA300. With the enhancement factor introduced in this paper, the measurement error can be reduced.

The Electromagnetic Environmental Impact of High-Voltage Transmission Line and its Prevention Methods

2013 ◽  
Vol 726-731 ◽  
pp. 4013-4016
Author(s):  
Jian Zhao Qi ◽  
Jun Guo
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Field Intensity ◽  
Transmission Lines ◽  
Electric Field Intensity ◽  
Parameters Optimization ◽  
Electromagnetic Environment ◽  
Minimal Impact ◽  
Phase Sequence ◽  
Frequency Electric Field

This paper calculates frequency electric field intensity by the equivalent charge method, and analyzes the main factors affecting the electromagnetic environment of the 500kV Double Circuit Transmission Lines. In the same electromagnetic transmission line calculation parameters, optimization of phase sequence can effectively reduce the frequency electric field intensity; with the increase of the distance, the line frequency electric field intensity significantly reduces away from the center line within 25m. Finally, the paper obtains the phase sequence arrangement with minimal impact on the electromagnetic environment and the minimum ground clearance meeting the environmental requirements.

scholarly journals ASSESSMENT OF LEVELS OF ELECTROMAGNETIC FIELDS WITH POWER-FREQUENCY OF 50 HZ FROM VARIOUS SOURCES IN INDOORS AND OFFICE ENVIRONMENT

2019 ◽  
Vol 96 (11) ◽  
pp. 1045-1048
Author(s):  
Yu. D. Gubernskiy ◽  
Mikhail E. Goshin ◽  
I. M. Banin
Keyword(s):  
Electric Field ◽  
Electromagnetic Fields ◽  
Field Intensity ◽  
Magnetic Induction ◽  
Electric Field Intensity ◽  
Living Room ◽  
Simultaneous Operation ◽  
Office Environment ◽  
Power Frequency ◽  
Different Sources

The article gives an assessment of levels of the power of 50Hz frequency electromagnetic fields from different sources in the places of a person’s longest indoor and office environment stay - a workplace equipped with a personal computer, a desktop in the kitchen, a sofa in the living room. An electric field intensity and magnetic induction from different sources by their simultaneous operation were shown to be not added arithmetically; at the same time total indices of electromagnetic impact on a person are maximum at a workplace. The average evaluation of electric field intensity in this case can reach 160.5 V/m, the average evaluation of the level of magnetic induction is 0.3 mT.

Effect of Electrical Trees on the Distribution of Electric Field and Space Charge in Cross-linked Polyethylene Cables

2020 ◽  
Vol 13 ◽  
Author(s):  
Yasha Li ◽  
Huiyao Wang ◽  
Kai Chen ◽  
Jiamao Chen
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Three Dimensional ◽  
Trunk Length ◽  
Xlpe Cable ◽  
Insulation Aging ◽  
Electrical Trees ◽  
Distribution Of Electric Field

Background: Electrical trees can affect the distribution of electric field and space charge in cross-linked polyethylene (XLPE) cables, and play an important role in insulation aging and breakdown of cables. Therefore, it is important to study the influence of electrical trees in cables. Methods: In this study, the finite element method of second-order tetrahedral element and electromagnetic theory method are used for calculation. A model of XLPE cable with three-dimensional electrical trees is taken as an example for calculation. Results: The results shows that the longer the trunk length is, the greater the electric field intensity at the end of the branch is; the farther the electrical trees are from the insulation side of the high voltage, the more the electric field intensity of each location decreases. Conclusion: With the increase of the resistivity of the trees, the electric field intensity and charge density tend to be stable at the end of the tree.

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