Simulator 16 User Guide - PowerWorld

Mutual Impedance Records
The Mutual Impedance Records table is a Case Information Display and can be customized like any
other case information display. The zero sequence mutual impedance records displayed in this table
can be either read from a sequence data file, or created manually by choosing Insert… from the local
menu.
The common fields displayed on the Mutual Impedance Records display are:
L1 From Bus, L1 To Bus, and L1 Ckt ID
These fields represent the from bus number, to bus number, and circuit identifier for the first
mutually coupled line.
L2 From Bus, L2 To Bus, and L2 Ckt ID
These fields represent the from bus number, to bus number, and circuit identifier for the second
mutually coupled line.
Mutual R, Mutual X
The mutual impedance, in terms of the resistance and reactance (per unit). The dot convention of
the mutual impedance assumes the From bus of each line to be the dotted terminal, with the sign of
the mutual impedance values being set according to this convention.
L1 Mut. Start, L1 Mut. End
The starting point and ending point of the mutually coupled portion of the first mutually coupled
line. The values are between 0 and 1, and represent a position on the line as a percentage of the
total line length. These fields are only used when evaluating an in-line fault to determine the affect
of the mutual impedance on each side of the fault point on the line.
L2 Mut. Start, L2 Mut. End
The starting point and ending point of the mutually coupled portion of the second mutually coupled
line. The values are between 0 and 1, and represent a position on the line as a percentage of the
total line length. These fields are only used when evaluating an in-line fault to determine the affect
of the mutual impedance on each side of the fault point on the line.
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