Effect of Shielding Lines on Power Frequency Electric Field under Overhead Lines

2013 ◽  
Vol 732-733 ◽  
pp. 999-1004
Author(s):  
Yu Ze Jiang ◽  
Zhen Guang Liang ◽  
Wei Jie Ma ◽  
Hong Chuan Wang
Keyword(s):  
Electric Field ◽  
Analytical Method ◽  
Simulation Method ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Three Phase ◽  
Power Frequency ◽  
Frequency Electric Field

This paper discusses effect of shielding lines on reduction of electric field produced by overhead lines. Charge simulation method is used. Influences of height, space and number of shielding lines on electric field are calculated. Space between shielding lines has reverse roles on influencing area and maximal electric field. Number and space of shielding lines should be carefully selected to shielding a certain area. Analytical method is also used to express induced electric field by shielding lines. Result of comparison with charge simulation method shows that it is suitable for area outside of three phase lines.

Calculation of Power Frequency Electric Field under Overhead Lines with Complex Ground

2013 ◽  
Vol 441 ◽  
pp. 212-216
Author(s):  
Zhen Guang Liang ◽  
Yu Ze Jiang ◽  
Di Wen Jiang ◽  
Zong Jie Liu
Keyword(s):  
Electric Field ◽  
Surface Charge ◽  
Simulation Method ◽  
Three Dimension ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Straight Line ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
Distribution Of Electric Field

This paper studied influence of three dimension complex ground on electric field under overhead lines. Surface charge method is discussed and planar triangle surface charge elements are used to represent complex ground. Electric field of overhead lines is analyzed by charge simulation method. Finite straight line charges are used to represent conductors. Then electric field of 220kV double circuit overhead lines over a three dimension small hill is calculated and distribution of electric field 1.5m above the ground is analyzed.

The Whole Simulation Analysis and Measurement of the Power Frequency Electric Field in 500kV Substation

2014 ◽  
Vol 672-674 ◽  
pp. 837-841
Author(s):  
Luo Peng ◽  
Li Yong Ming
Keyword(s):  
Electric Field ◽  
Electric Field Distribution ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Rapid Analysis ◽  
Charge Simulation Method ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
Distribution Of Power ◽  
Good Agreement

An improved Charge Simulation Method (CSM) is proposed in this paper. Based on this method, the model of the overall 500kV substation is established, and then the power frequency electric field in substation at the height of the 1.5mabovethegroundis simulated and calculated. Specifically, these on 500kV switch yard in the station are simulated and analysis. The results show that the simulation results are in good agreement with the actual substation measured results, which is proved the correctness of the model and the algorithm. This paper provides an effective method for the rapid analysis of the distribution of power frequency electric field in ultra-high-voltage substation, and also can use the method to study the effects of electric field distribution factors in substation.

Effect of Transmission Tower on Electric Field under Overhead Lines

2014 ◽  
Vol 668-669 ◽  
pp. 767-770
Author(s):  
Zhen Guang Liang ◽  
Yu Ze Jiang ◽  
Zong Jie Liu
Keyword(s):  
Electric Field ◽  
Simulation Method ◽  
Shielding Effect ◽  
Closed Region ◽  
Transmission Tower ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Straight Line ◽  
Distortion Effect ◽  
Calculation Results

This paper discusses effect of transmission tower on electric field under overhead lines. Charge simulation method is used. Transmission tower is taken into account by using a simplified frame. Segments of tower frame are represented by finite straight line charges. Overhead lines with conductor sag determined by catenary equation are also represented by finite straight line charges. Calculation results show that transmission tower has shielding effect on closed region and distortion effect nearby tower leg.

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.

Study on Distribution Model of Electric Field for 220 kV Transmission Lines and Implement

2013 ◽  
Vol 860-863 ◽  
pp. 2315-2319
Author(s):  
Guang Zhou Zhang ◽  
Mu Li ◽  
Gong Da Zhang ◽  
Hu Zhang ◽  
Shu Bo Fang
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Transmission Line ◽  
Electric Field Strength ◽  
Transmission Lines ◽  
Simulation Method ◽  
Distribution Model ◽  
Charge Simulation Method ◽  
Power Frequency ◽  
Made In

For studying the environment of power frequency electric field near the transmission line, the electric field model of 220kV transmission line was made in charge simulation method. Using the model, the electric field strength nearby the ground that under the lines was calculated and the distribute curves were drew in MATLAB language. The results showed that increasing the height of the conductors to ground, the electric field strength at the same point becomes lower.

Effect of Phase Sequence Layout on Electric Field under Overhead Lines

2014 ◽  
Vol 960-961 ◽  
pp. 921-924
Author(s):  
Yu Ze Jiang ◽  
Zhen Guang Liang ◽  
Can Li ◽  
Bin Xiang Du
Keyword(s):  
Electric Field ◽  
Simulation Method ◽  
Major Influence ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Phase Sequence ◽  
Phase Arrangement

This paper discusses effect of phase sequence layout on electric field under overhead lines. Charge simulation method is used. Examples of two circuit overhead lines and four circuit overhead lines show that phase arrangment of lowest height conductors has major influence and phase arrangment of middle height conductors has lesser influence on electric field under overhead lines. Interlacing placed lowest height conductors with different phase and phase arrangement of middle height conductors different from that of lowest height conductors help to reduce electric field.

Calculation of Electric Field under Overhead Lines with a Human Body Existing

2014 ◽  
Vol 1070-1072 ◽  
pp. 1159-1162
Author(s):  
Zhen Guang Liang ◽  
Can Li ◽  
Yu Ze Jiang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Field ◽  
Human Body ◽  
Simulation Method ◽  
The Body ◽  
Charge Simulation Method ◽  
Overhead Lines ◽  
Calculation Results ◽  
Element Method

In the paper, electric field under overhead lines with human body existing is studied. The mixed method coupling finite element method with charge simulation method is constructed. Linkage of the finite element method domain and the charge simulation method domain is done by use of surface charge at interface. A simplified model with basic figure of human body is used. Calculation results show that human body has distortion effect on electric field nearby. Electric field at region very close to human body is greatly enhanced, while there’s little influence at region far away from the body. Head and upper side of human body play main roles of induction.

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