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Figure 2-78
Operating range of the power swing detection for polygon and MHO characteristics
In Figure 2-78, a simplified logic diagram for the power swing function is given. This measurement is executed
per phase. A power swing signal will be generated if the measured impedance is inside the power swing
polygon (PPOL). The power swing signal remains active until a fault occurs or until the power swing has de-
cayed. The power swing detection can be blocked via the binary input No. 4160 „>Pow. Swing BLK".
Figure 2-79
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
Logic diagram of power swing detection
Functions
2.6 Power Swing Detection (optional)
183
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