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
146
Imin > 0.10 IBase
Umax < 0.92 UBase
0.2 £ f(Ucos) £ 8Hz
d ³ StartAngle
Z cross line ZA - ZC
Z cross line ZC - ZB
N1Limit
d £ TripAngle
N2Limit
IEC07000100 V2 EN-US
Figure 39: Logic diagram of the pole slip protection PSPPPAM

Completing the test

Continue to test another function or end the test by changing the TESTMODE
setting to Off. 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 ) function in the IED can be used for both
generator protection and as well for line protection applications.
The main purpose of the OOSPPAM function is to detect, evaluate, and take the
required action during pole slipping occurrences in the power system.
The OOSPPAM 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-slip is usually allowed before the generator-transformer unit is
disconnected. A parameter setting is available to take into account the circuit
breaker opening time. If there are several out-of-step relays in the power system,
then the one which finds the center of oscillation in its zone 1 should operate first.
AND
AND
AND
AND
Counter
a
b a ³ b
Counter
a
b a ³ b
Transformer protection RET670 2.2 IEC
1MRK 504 165-UEN A
START
ZONE1
ZONE2
TRIP1
AND
TRIP
OR
TRIP2
AND
IEC07000100_2_en.vsd
SEMOD175096-39 v2
GUID-BF2F7D4C-F579-4EBD-9AFC-7C03296BD5D4 v8
Commissioning manual