Completing The Test; Out-Of-Step Protection Oosppam - ABB RET670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.11.2
11.4.12
150
Imin > 0.10 IBase
Vmax < 0.92 VBase
0.2 £ f(Ucos) £ 8Hz
d ³ PickupAngle
Z cross line ZA - ZC
Z cross line ZC - ZB
N1Limit
d £ TripAngle
N2Limit
ANSI07000100 V2 EN
Figure 39: Logic diagram of the pole slip protection PSPPPAM (78)

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were changed
for testing purposes.

Out-of-step protection OOSPPAM

The out-of-step protection (OOSPPAM (78)) function in the IED can be used for both
generator protection and as well for line protection applications.
The main purpose of the OOSPPAM (78) function is to detect, evaluate, and take the
required action during pole slipping occurrences in the power system.
The OOSPPAM (78) function detects pole slip conditions and trips the generator as fast
as possible, after the first pole-slip if the center of oscillation is found to be in zone 1,
which normally includes the generator and its step-up power transformer. If the center of
oscillation is found to be further out in the power system, in zone 2, more than one pole-
AND
AND
AND
AND
Counter
a
b a ³ b
Counter
a
b a ³ b
Transformer protection RET670 2.2 ANSI
1MRK 504 165-UUS -
PICKUP
ZONE1
ZONE2
TRIP1
AND
TRIP
OR
TRIP2
AND
ANSI07000100_2_en.vsd
Commissioning manual