Alstom Reason RPV311 - Examples; Figure 74 - Three Terminal Line Application

RPV311
Chapter 9 – TW Fault Locator
RPV311-TM-EN-6
181
Figure 74 – Three terminal line application
6.1 EXAMPLES
Consider the TAP point located at 50% of line A-B and 50% of line C-B. Consider the names and topology of
Figure 74.
Example 1:
If the result of the fault location of the line A-B returns more than 50% of the length of the line and the result
of the fault location of line C-B also returns more the 50% of the length, then we know the fault is in the L1’’
section, as in Figure 74 Figure 75.
Example 2
Now consider the result of fault location on line A-B being at more than 50% of the length and the result of
the fault location on line C-B at less than 50%, then we know the fault is in the L2 section, as in
Figure 75 and Figure 76 show the location of the faults in example 1 and 2, respectively.
L1=(L1’ + L1’’)
L2
L1’
L1’’