Figure 156: Reactive Reach Settings; Psb Timer Setting Guidelines - GE MiCOM P40 Agile Technical Manual

P543i/P545i
The angle Alpha should be set equal to the angle of the total impedance Z
a = Ð Z
T
Resistive reverse (R')

Figure 156: Reactive reach settings

3.6.3

PSB TIMER SETTING GUIDELINES

The Setting PSB Time setting can be calculated as follows:
( ) f
θ θ
− ⋅
1 2
∆t =
f
PS
where
angles q and q
● are defined in the following figure
1 2
f is the nominal frequency
●
nom
● f is the maximum Power Swing frequency to be taken into account
PS
Since any power swing with f
swings with f < 0.5Hz Hz need to be considered for Slow Power Swing detection. We recommended setting f
PS
1Hz because this value provides sufficient security margin.
P54x1i-TM-EN-1
+jX
Z
R
Z
L
Z
T
Z
S
nom
>= 0.5Hz can be detected by the setting-free delta current algorithm, only power
PS
Chapter 10 - Power Swing Functions
:
T
Zone 8
Zone 7
α = ÐZ
T
Resistive forward (+R)
V02751
to
PS
281