Measurement of transmission line parameters in time domain
Measurement of transmission line parameters in time domain
(OP)
Hi folks,
We are planning to start a R&D Project to measure the parameters of transmission lines, using time domain (not frequence domain) approach.
We intend to use instuments of good accuracy synchronized by GPS such those used to synchrophasors.
We expect that the results of this Project could validate the TL parameters we normally use in our system studies (protection, load flow, etc.).
I wonder if somebody could help us in finding specific literature on this matter, or if know people that has worked in this field.
Thank you in advance!
Best regards,
Herivelto Bronzeado
We are planning to start a R&D Project to measure the parameters of transmission lines, using time domain (not frequence domain) approach.
We intend to use instuments of good accuracy synchronized by GPS such those used to synchrophasors.
We expect that the results of this Project could validate the TL parameters we normally use in our system studies (protection, load flow, etc.).
I wonder if somebody could help us in finding specific literature on this matter, or if know people that has worked in this field.
Thank you in advance!
Best regards,
Herivelto Bronzeado






RE: Measurement of transmission line parameters in time domain
RE: Measurement of transmission line parameters in time domain
Thank you for your reply.
We am not going to use synchrophasors (frequence domain)but the instruments used in that system due to their accuracy.
We intend to work with the waveforms in both normal and fault conditions. So we may get the zero sequence parameters (fault condition).
We will monitoring the both ends of the TL and will work with the voltage and current waveforms (time domain) to calculate the TL parameters.
We intend also to see how the TL parameters changes with the load and weather conditions. It seems to be a very interesting subject.
Best regards,
Herivelto Bronzeado
RE: Measurement of transmission line parameters in time domain
http:/
It may be worthwhile to investigate.
RE: Measurement of transmission line parameters in time domain
Thank you for the information. I will investigate to see if this device can help me.
Remember that we are looking for measuring the TL parameters in the time domain without de-energize the line.
Best regards,
Herivelto Bronzeado
RE: Measurement of transmission line parameters in time domain
RE: Measurement of transmission line parameters in time domain
Are you looking at using properties of wavelets?
RE: Measurement of transmission line parameters in time domain
What we really intend to do is to install two instruments with very good accuracy, one in each end of a TL, synchronizing them via GPS to get the same time window at every snapshot.
Then, from these "windows" we will try to get the "transfer function" of the transmission line, with the instruments remain on line and getting snapshot at:
a) every 10 minutes and,
b) during fault conditions.
In (a) we will try to get information on the TL parameters of positive and negative sequence and, also, how they vary with system conditions. Initially, the measurements will be done on a single TL (no others TL in parallel. Then, we will move to a TL in a corridor with more than 2 TL in parallel to verify the effect of mutual coupling.
In (b) we will try to get information on TL parameters of zero sequence and, also, see how it varies with system and weather conditions.
The time domain approach is used because we want to consider mutual couplings and voltage and current distortions.
I would apreciate your thoughts and literature on that. Thank you.
Herivelto Bronzeado
RE: Measurement of transmission line parameters in time domain
Mark