scholarly journals Electric Field and Potential Distribution in a 420 kV Novel Unibody Composite Cross-Arm

2017 ◽  
Author(s):  
Tohid Jahangiri ◽  
Claus Leth Bak ◽  
Faria Da Silva ◽  
Brian Endahl
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Transmission Lines ◽  
Potential Distribution ◽  
Electric Field Distribution ◽  
The Novel ◽  
Hollow Core ◽  
Element Analysis ◽  
Power Frequency ◽  
Analysis Package

<p>The use of uni-body composite cross-arm in a fully composite-based pylon is a new concept for the next generation of overhead transmission lines. The crossarm is stressed by phase-to-phase voltages except in two regions, which are stressed by phase-to-ground voltages caused by installation of shield wires. Due to a major difference between the novel cross-arm structure and traditional composite cross-arms, the electric field distribution in the uni-body composite cross-arm is of considerable interest. This paper presents and analyses the electric field distribution around and inside the hollow core uni-body cross-arm through which ground cable passes to connect the shield wires. Two different shed profiles are considered on the cross-arm and evaluated based on the guidelines of IEC 60815-3. </p><p>The 2D geometry of pylon is modeled in ANSYS Finite Element Analysis package. The electric field and potential distribution along the pylon is graphically depicted and the effectiveness of assigned shed profiles in controlling the power frequency stresses are investigated in the areas with high field intensities.</p>

Electric Field Analysis of 220 kV Composite Material Tower Lines

2012 ◽  
Vol 516-517 ◽  
pp. 1517-1520
Author(s):  
Jian Xun Hu ◽  
Gong Da Zhang ◽  
Hong Yu Zhang ◽  
Xiao Qin Zhang
Keyword(s):  
Composite Material ◽  
Electric Field ◽  
Field Distribution ◽  
Transmission Lines ◽  
Electric Field Distribution ◽  
Field Analysis ◽  
Electric Field Effect ◽  
Transmission Tower ◽  
Element Analysis ◽  
Electric Field Analysis

Using the finite element analysis, this work analyzed the electric field distribution of 220kV transmission steel tower with double-circuit and composite material transmission tower with the same size, and compared the electric field effect of two materials transmission tower for surroundings. And this work compared the vertical and axial electric field distribution along transmission line of the two materials transmission tower. The results indicate the composite material tower can improve the environment of electric field near the transmission lines.

scholarly journals Simulation Research on Electric Field Distribution of Insulator String in ULTRA High Voltage Transmission Line

2021 ◽  
Vol 2108 (1) ◽  
pp. 012024
Author(s):  
Weihao Shen
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Field Distribution ◽  
Field Intensity ◽  
Transmission Lines ◽  
Potential Distribution ◽  
Electric Field Distribution ◽  
Stable Operation ◽  
Three Dimensional Model ◽  
Initial Field

Abstract Insulators are one of the important components of overhead transmission lines. Because of their excellent characteristics, insulators have obvious advantages in the selection of external insulation in UHV AC transmission projects. The potential distribution of insulator string is not even due to the shape characteristics of insulator string, the structure of metal tool, the low conductivity of silicon rubber material and the stray capacitance between insulator string and wire, iron tower and metal tool. When the surface field intensity of insulators and fittings exceeds the initial field intensity, corona discharge will occur, which will affect the electromagnetic environment and the operation characteristics of insulating materials. Therefore, it is of great significance to determine the potential distribution of insulator strings of UHV transmission lines for detecting low and zero value insulators, implementing voltage equalization measures effectively, and ensuring the safe and stable operation of transmission lines. Based on Ansys software of 500kv transmission line insulator string, this paper establishes a three-dimensional model, the method of using finite element numerical simulation respectively with no equalizing ring and equalizing ring in both cases the umbrella skirt on simulation, the distribution of electric field along the roots, and further studies the equalizing ring the effect of different parameters on the electric field distribution. Finally, an optimal solution is established.

Electric Field Distribution Analysis of ±1000kV DC Wall Bushing during Polarity Reversal

2012 ◽  
Vol 229-231 ◽  
pp. 807-810
Author(s):  
Li Zhang ◽  
Qing Min Li ◽  
Li Na Zhang ◽  
Yu Di Cong
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Potential Distribution ◽  
Electric Field Distribution ◽  
Polarity Reversal ◽  
Distribution Analysis ◽  
The Finite Element Method ◽  
Insulation System ◽  
The Moment ◽  
Short Time

±1000kV DC wall bushing under planning is a complex insulation system which bears the effects imposed by different working conditions. The electric field distribution is concentrated at the bushing outlet terminal, which might result in breakdown discharge especially when short-time abrupt conditions such as polarity reversal occur. In this paper, the finite element method is utilized to analyze electric field distribution and potential distribution of wall bushing during polarity reversal. Electric field distribution and potential distribution at the moment of polarity reversal are obtained, which provides value reference for the study of polarity reversal process.

Design of Terraced Spinneret Based on Simulation of Electric Field Distribution in Electrospinning

2013 ◽  
Vol 690-693 ◽  
pp. 3132-3135 ◽  
Author(s):  
Guo Jun Jiang ◽  
Sai Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Electric Field ◽  
Field Distribution ◽  
Large Scale ◽  
Electric Field Distribution ◽  
Special Design ◽  
Electrospinning Technique ◽  
Element Analysis ◽  
The Finite Element Analysis

The low productivity of conventional single-needle electrospinning inhibits the application of nanofibers to a commercial level. In order to improve the productivity of the electrospinning technique, a terraced spinneret has been designed based on the finite element analysis in this paper. The electric field distribution was modeled with the use of Ansoft Maxwell software. The experiment results demonstrated this special design spinneret has the potential to produce smooth nanofibers on a large scale.

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