In practical electricity, people use the trial and error method to detect the fault location (Line to line fault / line to ground fault) of a transmission line. They feed supply at the single end at a time by dividing that transmission line into two parts and check the fault up to that section. These processes go on until they find the fault area. After checking if they found anything, then it is ok to go forward.
This process is done from both ends and they sort out the exact location. For finding out the fault phase, they use megger (check the value of resistance between the line to ground and Line to Line for each phase). These technologies take more human effort and consume more time.
Is there any easy technology to solve these kinds of problems?
At present we are solving this problem as an employees of TSECL, 33KV Line from Panisagar to Pacarthol, North Tripura, India.
Power Grid Corporation of India Ltd., had arranged for an exhibition cum students' project contest. It was called ‘Live Power Line Inspecting Robot - GRIDTECH 2013’. When I was with Vel Tech University, we motivated few students to participate in the contest. They got First Prize of 5 lakh was shared by VTU and IIT, Kanpur. For further details you may contact Prof. Dr. Balasubramanian Esakki over his e-mail ID ([email protected]).
Regards,
Dr.S.Ravindran
Most modern microprocessor relays have a fault location function that use an algorithm to determine the location of a fault based on the fault current and the line impedances entered in the relay settings.
Thanks @James Ghrist ,
It will be helpful for us if you give the following information...
1. brief specification about that relay
2. Any information to purchase those relay
3. Any information where this relay has been already been implemented and the address of those authority.
Thanks and Regards
Suman Debnath
Manager, TSECL, Tripura, India
One example, Schweitzer SEL-351S. See https://www.selinc.com/SEL-351S/ where you can download specifications.
Fault Locator. The relay includes a fault locating algorithm to calculate fault location without communications channels, special instrument transformers, or prefault information.
Fault locator functions are available on many relays that have directional overcurrent or distance functions from SEL, ABB, Seimens, GE, etc. See the appropriate websites for details.
Various algorithms are available to calculate fault location in medium and high voltage transmission lines. The following books may be very helpful in this regard.
http://samples.sainsburysebooks.co.uk/9780470747575_sample_382362.pdf
http://www.shirazedc.co.ir/DorsaPax/userfiles/file/Ebook/Power%20System%20Relaying%20-%20Horowitz.pdf
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