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TRANSMISSION LINE FAULT MONITORING


Posted by: seminar class
Created at: Thursday 03rd of March 2011 10:10:52 PM
Last Edited Or Replied at :Sunday 13th of January 2013 10:59:59 AM
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In an electric power system, a fault is any abnormal flow of electric current. For example a short circuit is a fault in which current flow bypasses the normal load. An open circuit fault occurs if a circuit is interrupted by some failure. In three phase systems, a fault may involve one or more phases and ground, or may occur only between phases. In a ground fault or earth fault, current flows into the earth. The prospective short circuit current of a fault can be calculated for power systems. In power systems, protective devices detect fault conditions and operate circuit breakers and ot..................[:=> Show Contents <=:]



IDENTIFICATION OF ACCURATE TRANSMISSION LINE FAULT LOCATOR USING GPS SATELLITE


Posted by: dhanavidya
Created at: Wednesday 01st of February 2012 03:57:41 AM
Last Edited Or Replied at :Wednesday 01st of February 2012 03:57:41 AM
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DHANA VIDYA.K
B.E(EEE)-FINAL YEAR
NEED OF DETA..................[:=> Show Contents <=:]



distance protection on Transmission lines


Posted by: grp_prabhagaran
Created at: Saturday 27th of August 2011 04:26:29 AM
Last Edited Or Replied at :Saturday 27th of August 2011 04:26:29 AM
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Dear Members
Can any one send ..................[:=> Show Contents <=:]



ICING OF POWER TRANSMISSION lines


Posted by: smart paper boy
Created at: Thursday 14th of July 2011 04:22:23 AM
Last Edited Or Replied at :Wednesday 12th of December 2012 03:08:59 AM
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POWER TRANSMISSION lines during winter storms are a persistent problem that causes outages and costs millions of dollars in repair expenses. High-frequency excitation at approximately 8-200 kHz has been proposed as a method to melt ice. The method works by a combination of two mechanisms. At these frequencies, ice is a lossy dielectric, causing heating directly in the ice. In addition skin effect causes current to flow only in a thin layer on the surface of the line, causing resistive losses and consequent heating.In this article, we describe the design of systems to implement this method ..................[:=> Show Contents <=:]



TRANSMISSION LINE FAULT MONITORING


Posted by: seminar class
Created at: Thursday 03rd of March 2011 10:10:52 PM
Last Edited Or Replied at :Sunday 13th of January 2013 10:59:59 AM
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poles, birds, line breaks, etc. A fault involving all the three phases is known as symmetrical fault while one involving only one or two phases is known as unsymmetrical fault .we are working on monitoring these faults during occurring on transmission line. In this project we indicate the fault on LCD. These faults are monitoring by using microcontroller.
We used 16*2 LCD display to indicate fault. We used Microcontroller 8051. 8051 is 8 bit single chip CPU. It contains inbuilt 8 kb ROM and 256 byte RAM.
8051 is 40 pin IC having four ports p0, p1, p2 and p3. ..................[:=> Show Contents <=:]



Transmission Line Fault Detection Phase Selection using ANN


Posted by: project topics
Created at: Wednesday 14th of April 2010 02:49:11 PM
Last Edited Or Replied at :Tuesday 03rd of May 2011 11:30:55 PM
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ce is experienced once the neural network is trained sufficiently and suitably, thus performing correctly when faced with different system..................[:=> Show Contents <=:]



protection of transmission lines using gps full report


Posted by: computer science technology
Created at: Thursday 21st of January 2010 12:41:50 AM
Last Edited Or Replied at :Tuesday 16th of October 2012 02:55:02 AM
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¢ phase to ground
fault occurring at the point F2 in fig. In this case , the time
difference between Tp and Tq , Tp and Tr correspond to the wave travel
time from P to Q and P to R respectively, and therefore the fault is
onside the area considered in the study.
Tp - Tq = Lpq/V
Tp - Tr = Lpr/V
The relays therefore restrain the circuit breakers associated with
sections PQR from tripping.

The relay installed at bus bar ËœSâ„¢ will detect the time tag the fault
generated transient wave together with the time tag data received from
the relay at bus bar ËœPâ„..................[:=> Show Contents <=:]



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