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5.3
88
Power swing detection (PSD)
Figure 37:
Operating principle and characteristic of the PSD function
Function block
PSD--
PSD
BLOCK
START
BLKI01
ZIN
BLKI02
ZOUT
BLK1PH
REL1PH
BLK2PH
REL2PH
I0CHECK
TRSP
EXTERNAL
xx00000180.vsd
jX
⋅ 1
KX X IN
X IN
1
−
⋅
KR R IN
1
− R IN
1
− X IN
1
−
⋅
KX X IN
1
Impedance locus at power swing
tP1
99000159.vsd
Chapter 4
Line distance
R1
IN
R
⋅ 1
KR R IN
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