i want the report on transmission line protection against lightning using arrestors. its urgent ....etc

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Abstract
Recently proposed concept of simultaneous ac-dc power transmission enables the long EHV ac lines to be loaded close to their thermal limits. The conductors are allowed to carry certain amount of dc current superimposed on usual ac. This paper presents the power up gradation of existing EHV ac line corridor by converting it into composite ac-dc power transmission line. No alterations of conductors, insulator strings or towers of the original line are needed. Simulation study is carried out on PSCAD/EMTDC software package. Ind ....etc

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Abstract:
This paper deals with the application of artificial neural networks (ANNs) to fault detection and location in extra high voltage (EHV) transmission lines for high speed protection using terminal line data. The proposed neural fault detector and locator were trained using various sets of data available from a selected power network model and simulating different fault scenarios (fault types, fault locations, fault resistances and fault inception angles) and different power system data (source capacities, source voltages, source angle ....etc

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Upgradation of Existing EHVAC Line by Composite AC-DC Transmission

H. Rahman



Abstract--


Recently proposed concept of simultaneous ac-dc power transmission enables the long EHV ac lines to be loaded close to their thermal limits. The conductors are allowed to carry certain amount of dc current superimposed on usual ac. This paper presents the power up gradation of existing EHV ac line corridor by converting it into composite ac-dc power transmission line. No alterations of conductors, insulator ....etc

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ABSTRACT
Transmission lines are considered one of the major sources of magnetic field. In recent years great public concern has arisen because of reports on adverse health effects due to Magnetic fields. The rapid increase of electric energy utilization and ascending geographical growth in the Gulf Cooperation Council (GCC) region led to the reality that utilities need to upgrade and develop existing and new transmission and distribution lines which resulted in the transmission lines to become inside the urban areas. This project is directed ....etc

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pls post me the above cited topic as power point presentation ....etc

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APPLICATION OF CURRENT DIFFERENTIAL PROTECTION TO TAPPED TRANSMISSION LINES
1. Introduction
Microprocessor-based current differential relays offer superior protection for power transmission lines. The key advantages over distance relays include better sensitivity for high resistance faults, 100% line protection, and better performance in the single-pole-tripping mode, particularly during evolving and cross-country faults. Besides the well-known requirements of high-speed communication and sampling synchronization, a microp ....etc

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ABSTRACT
This is a new technique for the protection of transmission systems by
using the global positioning system (GPS) and fault generated
transients. In this scheme the relay contains a fault transient
detection system together with a communication unit, which is connected
to the power line through the high voltage coupling capacitors of the
CVT. Relays are installed at each bus bar in a transmission network.
These detect the fault generated high frequency voltage transient
signals and record the time ....etc

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INTRODUCTION
Composed of pipes that houses conductors in SF6
Invented in 1974
Both overhead & underground system
Drawbacks of XLPE lead to GIL
Most economic, environment friendly & maintenance free alternative



WHY GIL
Installation expense is less
XLPE needs extra cooling arrangement
Allowe ....etc

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seminar report on 
gas insulated transmission lines ....etc

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