The device of claim 20, wherein the device is an intelligent electronic device associated with the first terminal.Ģ2. A device for fault location in a power transmission line connecting first and second terminals, the device comprising: a travelling wave detector configured to obtain arrival times of a first peak and a second peak of travelling waves detected from measurements carried out at the first and second terminals a faulty half identifier for identifying one of a first half, a second half, and a mid-point of the power transmission line as having the fault, based on a comparison of the arrival times obtained for the travelling wave detected from the measurements carried out at the first terminal, and the arrival times obtained for the travelling wave detected from the measurements carried out at the second terminal and a fault locator for estimating the fault location based on the identification of the first half, the second half or the mid-point as having the fault, the arrival times of the first and second peaks of the travelling waves detected from the measurements carried out at the first and second terminals, and a length of the power transmission line.Ģ1. The method of claim 18, wherein the fault location is estimated by taking an average of first and second fault locations, wherein the first fault location is estimated for a fault in the first half of the line and the second fault location is estimated for a fault in the second half of the line.Ģ0. The method of claim 12, wherein the mid-point of the power transmission line is identified as having the fault when the difference between (tn2−tm1) and (tm2−tn1) is less than a threshold value.ġ9. The method of claim 12, wherein the fault location in the second half of the line is estimated from ( L - ( ( tm 2 - tm 1 ) + ( tn 2 - tn 1 ) ) × L 4 ( tm 2 - tn 1 ) ), wherein L is the length of the power transmission line.ġ8. The method of claim 12, wherein the fault location in the first half of the line is estimated from ( ( ( tm 2 - tm 1 ) + ( tn 2 - tn 1 ) ) × L 4 ( tn 2 - tm 1 ) ), wherein L is the length of the power transmission line.ġ7.
The method of claim 13, wherein the mid-point of the power transmission line is identified as having the fault when the difference between (tn2−tm1) and (tm2−tn1) is less than a threshold value.ġ6. The method of claim 13, wherein the fault location in the first half of the line is estimated from ( ( ( tm 2 - tm 1 ) + ( tn 2 - tn 1 ) ) × L 4 ( tn 2 - tm 1 ) ) and wherein the fault location in the second half of the line is estimated from ( L - ( ( tm 2 - tm 1 ) + ( tn 2 - tn 1 ) ) × L 4 ( tm 2 - tn 1 ) ), wherein L is the length of the power transmission line.ġ5. The method of claim 12, wherein the fault is identified as being in the first half when (tn2−tm1) is greater than (tm2−tn1) and the fault is identified as being in the second half when (tm2−tn1) is greater than (tn2−tm1).ġ4. The method of claim 11, wherein identifying the rough location comprises comparing (tn2−tm1) with (tm2−tn1), wherein tm1 and tm2 are the arrival times of the first and second peaks obtained for the travelling wave detected from the measurements carried out at the first terminal, and tn1 and tn2 are the arrival times of the first and second peaks obtained for the travelling wave detected from the measurements carried out at the second terminal.ġ3.
A method for fault location in a power transmission line connecting a first terminal with a second terminal, wherein the method is implemented with a processor of a device associated with the power transmission line, the method comprising: obtaining arrival times of a first peak and a second peak of travelling waves detected from measurements carried out at the first and second terminals identifying a rough location of a fault based on a comparison of the arrival times obtained for the travelling waves detected from the measurements carried out at the first terminal, and the arrival times obtained for the travelling waves detected from the measurements carried out at the second terminal, the rough location being one of a first half, a second half, or a mid-point of the power transmission line and estimating the fault location based the rough location, the arrival times of the first and second peaks of the travelling waves detected from measurements carried out at the first and second terminals, and a length of the power transmission line.ġ2.
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