Differential Protection; Impedance Protection - ABB Relion RES670 Product Manual

Phasor measurement unit RES670 2.1 IEC
Table 4. Basic IED functions, continued
IEC 61850 or function
name
CAMSTATUS
TOOLINF
SAFEFILECOPY
Table 5. Local HMI functions
IEC 61850 or function
name
LHMICTRL
LANGUAGE
SCREEN
FNKEYTY1–FNKEYTY5
FNKEYMD1–FNKEYMD5
LEDGEN
OPENCLOSE_LED
GRP1_LED1–
GRP1_LED15
GRP2_LED1–
GRP2_LED15
GRP3_LED1–
GRP3_LED15

3. Differential protection

4. Impedance protection

Power swing detection ZMRPSB
Power swings may occur after disconnection of heavy
loads or trip of big generation plants.
Power swing detection function ZMRPSB is used to
detect power swings and initiate block of all distance
protection zones. Occurrence of earth-fault currents
during a power swing inhibits the ZMRPSB function, to
allow fault clearance.
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.
ABB
Description
Central account management status
Tools Information component
Safe file copy function
ANSI Description
Local HMI signals
Local human machine language
Local HMI Local human machine screen behavior
Parameter setting function for HMI in PCM600
General LED indication part for LHMI
LHMI LEDs for open and close keys
Basic part for CP HW LED indication module
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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,
M13873-3 v11
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 windings split into
two groups per phase, when each group is equipped
with current transformers. The protection function
1MRK 511 367-BEN D
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