7.16
Pole slip protection PSPPPAM
SEMOD156709-1 v2
7.16.1
Identification
SEMOD158949-2 v4
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Pole slip protection
PSPPPAM
U
cos
78
7.16.2
Application
SEMOD143248-4 v3
Normally, the generator operates synchronously with the power system, that is, all the
generators in the system have the same angular velocity and approximately the same phase
angle difference. If the phase angle between the generators gets too large the stable
operation of the system cannot be maintained. In such a case the generator loses the
synchronism (pole slip) to the external power system.
The situation with pole slip of a generator can be caused by different reasons.
A short circuit occurs in the external power grid, close to the generator. If the fault clearance
time is too long, the generator will accelerate so much, so the synchronism cannot be
maintained. The relative generator phase angle at a fault and pole slip, relative to the external
power system, is shown in figure
Section 7
1MRK 505 343-UEN B
Impedance protection
378
Application manual
Содержание Relion 670 series
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