ABB Relion 670 series - Completing the Test; Out-Of-Step Protection OOSPPAM

0.2 £ f(Ucos) £ 8Hz
AND
AND
PICKUP
Z cross line ZA - ZC
Z cross line ZC - ZB
AND
AND
ZONE1
ZONE2
Counter
N1Limit
a
b
a ³ b
AND
TRIP1
Counter
N2Limit
a
b
a ³ b
AND
TRIP2
OR
TRIP
ANSI07000100_2_en.vsd
Imin > 0.10 IBase
Vmax < 0.92 VBase
d ³ PickupAngle
d £ TripAngle
ANSI07000100 V2 EN-US
Figure 42: Logic diagram of the pole slip protection PSPPPAM (78)
11.4.11.2 Completing the test
SEMOD175096-39 v2
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.12 Out-of-step protection OOSPPAM
GUID-BF2F7D4C-F579-4EBD-9AFC-7C03296BD5D4 v8
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-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.
Two current channels I3P1 and I3P2 are available in OOSPPAM function to allow the direct connection of
two groups of three-phase currents; that may be needed for very powerful generators, with stator
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
144 Transformer protection RET670
Commissioning manual
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