A modified MoM-AOM approach for the analysis of lightning strike effects on transmission lines terminated by nonlinear loads

2010 ◽  
Author(s):  
V. Mashayekhi ◽  
R. Moini ◽  
S. H. H. Sadeghi ◽  
H. R. Karami
Keyword(s):  
Transmission Lines ◽  
Lightning Strike ◽  
Nonlinear Loads

scholarly journals Effect of indirect lightning strike to 66kV transmission line in Java-Bali system

2018 ◽  
Vol 197 ◽  
pp. 11001
Author(s):  
Aristo Adi Kusuma ◽  
Putu Agus Aditya Pramana ◽  
Brian Bramantyo S.D.A. Harsono ◽  
Buyung Sofiarto Munir
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Lightning Strike ◽  
Actual Condition ◽  
Peak Current ◽  
Lightning Strikes ◽  
Detection Systems ◽  
Current Magnitude ◽  
Lightning Detection ◽  
Insulator Flashover

Based on Java-Bali grid disturbance data, the 66kV transmission lines that is close to or intersect with 150kV or 500kV transmission line is often experienced earth fault due to insulator flashover. The insulator flashover can be caused by indirect lightning strike since lightning strikes tend to strike higher structure. Therefore, this paper will determine the effect of indirect lightning strike on 150kV or 500kV transmission line to 66kV transmission line by modeling and simulation using application of transient analysis. Variation of lightning peak current magnitude and gap between 66kV transmission line and transmission line with higher voltage is performed during simulation. The range of peak current magnitude follows the data from lightning detection systems, while the value of gap follows the data from actual condition. It is found that higher current peak and closer gap will cause higher transient overvoltage on insulator of 66kV transmission line thus insulator flashover may occur more frequent. Addition of earth wire on 66kV transmission line and gap between each transmission by organizing the sag of conductor can be performed to minimize the insulator flashover.

scholarly journals Analysis of Lightning Performance on 345 kV Transmission Lines Using Python Programming

2020 ◽  
Vol 3 (3) ◽  
pp. 65-76
Author(s):  
Fri Murdiya ◽  
Rofi Hariadi
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Electrical Power ◽  
Object Oriented Programming ◽  
Computer Application ◽  
Lightning Strike ◽  
Percentage Error ◽  
Power Transmission Lines ◽  
Shielding Failure ◽  
Python Programming

One of main causes of interruption of electrical power supply is the lightning strike on overhead power transmission lines. The lightning performance of transmission line can be determined by value of shielding failure flashover rate (SFFOR) and back flashover rate (BFOR). The object of this study is to create a computer application to compute lightning performance on the transmission lines using Python programming. Pythons package tkinter used for program interface window. Application programming is done by using the concept of object-oriented programming (OOP) using Pythons keyword class. Validation shows that the application has applied the method correctly with a percentage error 0 % for SFFOR and 3.14 % for BFOR. The application can do analysis on the factors that affecting SFFOR and BFOR such as the effect of thunder day, tower foot resistance, and number of isolator disk. The results obtained in this study is computer application that can perform lightning performance analysis and analysis of factors that can affect it, such as thunder day, tower foot resistance and the number of isolator disk.

Analysis on Lightning Withstand Level of Back Striking Flashover for Double-Circuit Transmission Line

2014 ◽  
Vol 1070-1072 ◽  
pp. 1050-1055 ◽  
Author(s):  
Shi Jun Xie ◽  
Jian Ming Li ◽  
Yu Han Jiang ◽  
Yu Zhang
Keyword(s):  
Power System ◽  
Simulation Model ◽  
Transmission Lines ◽  
Physical Mechanism ◽  
Transient Simulation ◽  
Lightning Strike ◽  
Significant Component ◽  
The Earth ◽  
Model Combining ◽  
The Stability

The double-circuit transmission lines have already been the significant component of power system. Because of the symmetric insulation of the two circuits, the case that both circuits trip out often happens when the tower suffer lightning strike. And it harms the stability of power system and causes serious impacts to power equipments. In this paper, an electric-magnetic transient simulation model was established. Using this model, combining the analysis of physical mechanism of back striking trip-out, the influences of earth resistance, height of tower and length of insulator on the lightning withstand level of back striking (LWLBS) were clarified. The LWLBS of high tower is much low, therefore the relative high tower should be paid more attention to defense the back striking. Reducing the earth resistance and increasing the length of insulator can both upgrade the LWLBS observably. Especially, reducing the earth resistance can enhance the effect of upgrading the LWLBS by increasing the length of insulator.

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