scholarly journals Optimal Design of 1200 kV UHV AC Transmission Lines in India using Newly Developed Standalone MATLAB GUI

2019 ◽  
Vol 8 (2) ◽  
pp. 6191-6197
Keyword(s):  
Electromagnetic Fields ◽  
Transmission Lines ◽  
Power Transmission ◽  
Electrical Power ◽  
Three Dimensional ◽  
Simulation Method ◽  
Technological Advancement ◽  
Power Transmission Lines ◽  
Actual Case ◽  
Potential Coefficient

Owing to tremendous growth in requirement of electrical power in the country, technological advancement in transmission systems is essential for transmission of bulk amount of power over long distances. Deciding value of corridor width for transmission lines are greatly influenced by magnitudes of electric and magnetic fields along its length. The precise evaluation of the electromagnetic fields and effects of corona like Radio Interference and Audible Noise generated by overhead transmission lines are thus of greater interest. This paper presents implementation of a novel GUI based technique to compute the fields generated by power transmission lines using three dimensional techniques. Actual case of Ultra High Voltage AC (UHVAC) line is considered for study. Transmission lines are analyzed by using newly developed software that facilitates computation and plotting of electromagnetic fields and corona effects in 3D coordinates. MATLAB is used as platform for development of GUI based software to analyze the fields along the entire length of transmission lines under study. It uses concept of charge simulation method (CSM) along with most fundamental Maxwell’s potential coefficient theory and 3D integration techniques.

scholarly journals Cancer cluster among young Indian adults living near power transmission lines in Bom Jesus do Tocantins, Pará, Brazil

1998 ◽  
Vol 14 (suppl 3) ◽  
pp. S161-S172 ◽  
Author(s):  
Sergio Koifman ◽  
Iara Ferraz ◽  
Trajano S. Viana ◽  
Carmen L. P. Silveira ◽  
Maria T. D. Carneiro ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Transmission Lines ◽  
Power Transmission ◽  
Organophosphorus Pesticides ◽  
Daily Activities ◽  
Blood Levels ◽  
Continuous Exposure ◽  
Power Transmission Lines ◽  
Cancer Cluster ◽  
Hair Samples

A case study was carried out to explore the occurrence of a cancer cluster in 1992 among young indian adults living in an Amazonian village near two 500 kV power transmission lines that began operating a decade ago. Current blood levels of DDT and organophosphorus pesticides and metal levels in hair samples were measured. Extremely low magnetic field exposure was determined during current daily activities carried out by the Indian villagers. Taking into account the cancer incidence rates in different Brazilian cities, the probability of the occurrence of this cluster by chance was considered remote (p< 0.003, Poisson distribution). High blood levels of p,p'-DDT (median levels ranging from 26 to 58 ppb) were observed. As a whole, this community showed a pattern of low exposure to organophosphorus pesticides, and high recent exposure was only observed in a few blood samples. Continuous exposure to extremely low electromagnetic fields originated in the power transmission lines (which reached 95.0 mG under the lines) was observed on several opportunities during daily activities carried out by Indian villagers. Further observational studies should evaluate the interaction between exposure to extremely low electromagnetic fields and prior exposure to tumor initiators in cancer development.

Development of Decision Support System for Protecting Distance between Power Lines and Trees

2013 ◽  
Vol 380-384 ◽  
pp. 3425-3428
Author(s):  
Guang Zu Ge ◽  
Bo Tang ◽  
Jian Xiong Zhu ◽  
Yin Huang ◽  
Zi Hang Qu
Keyword(s):  
Mathematical Model ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Three Dimensional ◽  
Spatial Distance ◽  
Power Transmission Lines ◽  
Tree Crown ◽  
Attribute Data ◽  
Spatial Coordinates

Resolving the contradiction between trees and power transmission lines in time is an important work to ensure the safety of transmission line operation. While it is difficult to decide the trees trimmed time during the transmission line operation and maintenance, the development of the management information system for protecting distance between transmission lines and trees, which is used to auxiliary predict the date of pruning, is a way to solve the problem. Collected attribute data of transmission lines and trees, the corresponding database is established. Therefore, Visual Basic 6.0 is adopted to develop the software system. Based on the spatial coordinates of line towers, conductors, and tree crown, the three-dimensional mathematical model is established to calculate the spatial distance between the conductor and tree crown. According to the mathematical model, the trees growth rate of year, month and day, respectively, and the protecting distance standard between conductor and tree crown, the system could calculate the actual spatial distance between conductor and tree crown, and auxiliary predict the pruning date.

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.

scholarly journals Corona Loss Minimization on High Voltage Transmission Line Network using Bundled Conductors.

2020 ◽  
Vol 9 (3) ◽  
pp. 887-891
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Hessian Matrix ◽  
Electrical Power ◽  
Power Transmission Lines ◽  
Long Distance ◽  
Power Stations ◽  
Line Network ◽  
Corona Losses

Electrical power generated and transmitted at a long distance away from the power stations is usually affected by inherent transmission line losses. The Ohmic and Corona losses which are predominantly common in power transmission lines are considered in this paper. These two losses are mathematically modeled with and without embedded bundled conductors. The resultant model which is a non-linear multivariable unconstrained optimized equation is minimized using the Hessian matrix determinant method for stability test purposes. The results obtained show that corona losses are minimized with embedded bundled conductors at a very low current value with large spacing distance between the bundled conductors. The decrease in the corona loss which is a consequence of spacing adjustment of the 2, 3, and 4 strands of bundled conductors was plotted using MATLAB 7.14. The plots obtained are in conformity with the inverse relation between corona loss and conductor spacing.

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