Directional Overpower Protection Goppdop (32) - ABB RELION RET670 Applications Manual

1MRK 504 163-UUS A
9.13
9.13.1
9.13.2
Transformer protection RET670 2.2 ANSI
Application manual
The value of k=0.92 is recommended in generator applications as the trip delay is
normally quite long.
The calibration factors for current and voltage measurement errors are set % of rated
current/voltage:
IMagComp5, IMagComp30, IMagComp100
VMagComp5, VMagComp30, VMagComp100
IMagComp5, IMagComp30, IMagComp100
The angle compensation is given as difference between current and voltage angle
errors.
The values are given for operating points 5, 30 and 100% of rated current/voltage. The
values should be available from instrument transformer test protocols.

Directional overpower protection GOPPDOP (32)

Identification
Function description
Directional overpower protection
Application
The task of a generator in a power plant is to convert mechanical energy available as a
torque on a rotating shaft to electric energy.
Sometimes, the mechanical power from a prime mover may decrease so much that it
does not cover bearing losses and ventilation losses. Then, the synchronous generator
becomes a synchronous motor and starts to take electric power from the rest of the
power system. This operating state, where individual synchronous machines operate as
motors, implies no risk for the machine itself. If the generator under consideration is
very large and if it consumes lots of electric power, it may be desirable to disconnect it
to ease the task for the rest of the power system.
IEC 61850 IEC 60617
identification identification
GOPPDOP
P >
2
DOCUMENT172362-IMG158942 V2 EN-US
Section 9
Current protection
SEMOD172360-1 v4
SEMOD176574-2 v4
ANSI/IEEE C37.2
device number
32
SEMOD172358-4 v2
585