ABB Relion 670 Series Applications Manual page 107

1MRK 511 407-UUS Rev. J
Section 7
7.1 Power swing detection, blocking and unblocking
ZMBURPSB(68)
7.1.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
7.1.2 Identification
Function description
Power swing detection, blocking and
unblocking
7.1.3 Application
7.1.3.1 Power swing blocking
Various changes in power system may cause oscillations of rotating units. The most typical
reasons for these oscillations are big changes in load or changes in power system configuration
caused by different faults and their clearance. As the rotating masses strive to find a stable
operate condition, they oscillate with damped oscillations until they reach the final stability.
The extent of the oscillations depends on the extent of the disturbances and on the natural
stability of the system.
The oscillation rate depends also on the inertia of the system and on the total system impedance
between different generating units. These oscillations cause changes in phase and amplitude of
Phasor measurement unit RES670
Application manual
Impedance protection
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 Power swing unblocking feature is made available to have phase selection and thereby,
releasing distance measuring loops for faults during power swing. Added new outputs
FLTL1, FLTL2, FLTL3, FLT1PH, FLT2PH, FLT3PH, STCND, and RELCND. IEC 61850 LN is
renamed as ZMBURPSB.
IEC 61850
identification
ZMBURPSB
© Copyright 2017 Hitachi Power Grids. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
68
Zpsb
SYMBOL-EE V1 EN-US
Section 7
Impedance protection
GUID-9EA1D091-D5FF-45B1-86E6-E9CDE3DD29BF v1
GUID-519970E3-BC9F-4DB7-9608-4CBD4E2ACB30 v1
GUID-69401D58-00EB-4560-8C35-72AF417E5441 v1
GUID-183E7EEC-F41A-4219-A430-F206C952552D v1
101