scholarly journals Calculation of electric field of HVDC transmission lines using finite element method

2013 ◽  
Vol 16 (4) ◽  
pp. 43-52
Author(s):  
Tu Phan Vu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Transmission Lines ◽  
Power Transmission ◽  
Viet Nam ◽  
Hvdc Transmission ◽  
Hvdc Transmission Lines

The HVDC transmission lines have been building in many modern countries in all over the world, and it will be an important problem of Viet Nam power transmission. The important phenomena of operation of HVDC transmission lines is corona discharge around HVDC transmission lines that is a cause to increase significantly the electric field strength over ground surface and around lines. This paper presents the investigation and calculation of the electric field strength of many models of HVDC transmission lines such as monopolar, bipolar, single- and double-circuit using the finite element method based on COMSOL MULTIPHYSICS software. The calculation results have shown the strength and shape of the electric field strength at many positions over ground level. These results are also good datum to calculate and design HVDC transmission lines of Viet Nam power transmission in the near future.

scholarly journals Influence of Viet Nam climatic condition on ampacity of overhead power transmission lines

2016 ◽  
Vol 19 (1) ◽  
pp. 20-30
Author(s):  
Nam Nhat Nguyen ◽  
Tuong Thien Tran ◽  
Tu Phan Vu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Transmission Lines ◽  
Climatic Condition ◽  
Power Transmission ◽  
Viet Nam ◽  
Power Transmission Lines ◽  
The Finite Element Method ◽  
Maximum Current ◽  
Overhead Power Transmission Lines

Based on our previous paper –[1], in which we have computed the ampacity of overhead power transmission lines with considering the influence of environmental conditions such as wind velocity, wind direction, temperature, and radiation coefficient on the typical line of ACSR, we continue in this paper to investigating the influence of Viet Nam climatic condition on the ampacity of overhead power transmission lines in twelve months of the year. The results obtained by the finite element method are compared with those computed by the IEEE standard have been shown the high accuracy and applicability of the finite element method. In particular, the comparison between our calculated results and the maximum current given by the design standard has been shown that if we monitor well the climatic condition, we can operate the real overhead transmission lines with the maximum current that is higher than the original design about several hundred amperes.

Reduction of electric field strength by two species of trees under power transmission lines

2017 ◽  
Vol 29 (5) ◽  
pp. 1415-1422 ◽  
Author(s):  
Hongwei Zhou ◽  
Liping Sun ◽  
Yang Yang ◽  
Che Liu ◽  
Tianshi Liu ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines

scholarly journals Calculation of thermal field and ampacity of overhead power transmission lines using finite element method

2014 ◽  
Vol 17 (1) ◽  
pp. 16-29
Author(s):  
Long Van Hoang Vo ◽  
Tu Phan Vu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Thermal Fields ◽  
Overhead Power Transmission Lines ◽  
Transmission And Distribution ◽  
Element Method

The population explosion and development of the national economy are two main causes of increasing the power demand. Besides, the Distributed Generations (DG) connected with the power transmission and distribution networks increase the transmission power on the existing lines as well. In general, for solving this problem, power utilities have to install some new power transmission and distribution lines. However, in some cases, the install of new power lines can strongly effect to the environment and even the economic efficiency is low. Nowadays, the problem considered by scientists, researchers and engineers is how to use efficiently the existing power transmission and distribution lines through calculating and monitoring their current carrying capacity at higher operation temperature, and thus the optimal use of these existing lines will bring higher efficiency to power companies. Generally, the current carrying capacity of power lines is computed based on the calculation of their thermal fields illustrated in IEEE [1], IEC [2] and CIGRE [3]. In this paper, we present the new approach that is the application of the finite element method based on Comsol Multiphysics software for modeling thermal fields of overhead power transmission lines. In particular, we investigate the influence of environmental conditions, such as wind velocity, wind direction, temperature and radiation coefficient on the typical line of ACSR. The comparisons between our numerical solutions and those obtained from IEEE have been shown the high accuracy and applicability of finite element method to compute thermal fields of overhead power transmission lines.

Resultant Electric Field Reduction With Shielding Wires Under Bipolar HVDC Transmission Lines

2014 ◽  
Vol 50 (2) ◽  
pp. 221-224 ◽  
Author(s):  
Feng Tian ◽  
Zhanqing Yu ◽  
Rong Zeng ◽  
Han Yin ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Electric Field ◽  
Transmission Lines ◽  
Hvdc Transmission ◽  
Hvdc Transmission Lines
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