Chapter 9 – TW Fault Locator
6 THREE TERMINAL LINE APPLICATION
The figure below shows a line of three-terminal. The Terminal A, B and C (sources X, Y and Z respectively).
Figure 73 - Typical Circuit Three-Terminal Application
To use TWFL in the case above 3 sets of equipment are necessary: 3(RPV311 + RA333). One set for each
terminal (Figure 74).
In this application, it is necessary to configure two transmission lines in the TW Fault Locator tool, which
means to create two powerline configuration files. The first powerline configuration file is regarding line A ->
B with length and k1 equal to L1 = L1’ + L1’’ (Figure 74), and the second powerline file configuration
regarding the section C -> B with length and k1 equal L1’’ + L2 (Figure 74).
In order to locate the fault is necessary to combine the fault location of both situations describe above.
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