Setting Guidelines - ABB REB670 Applications Manual

1MRK 505 337-UUS -
7.8.3
Application manual
protection (reference angle set to 0) to trip if the active power from the generator is less
than about 2%. One should set the overpower protection (reference angle set to 180) to trip
if the power flow from the network to the generator is higher than 1%.
Underpower protection
Q
Operate
Line
Margin
P
Operating point
without
turbine torque
IEC09000019 V2 EN
Figure 92: Reverse power protection with underpower or overpower protection

Setting guidelines

GlobalBaseSel: Selects the global base value group used by the function to define (IBase),
(VBase) and (SBase).
Operation: With the parameter Operation the function can be set Enabled/Disabled.
Mode: The voltage and current used for the power measurement. The setting possibilities
are shown in table 33.
Table 33: Complex power calculation
Mode
Set value
A, B, C
Arone
PosSeq
Table continues on next page
Overpower protection
Q
Operate
Line
Margin
P
Operating point
without
turbine torque
IEC09000019-2-en.vsd
Formula used for complex power calculation
=
S V
A
EQUATION2055-ANSI V1 EN
=
S V
AB
EQUATION2056-ANSI V1 EN
= ×
S 3 V
EQUATION2057-ANSI V1 EN
Current protection
* *
× + × + ×
I V I V I
A B B C C
* *
× - ×
I V I
A BC C
*
×
I
PosSeq PosSeq
Section 7
*
(Equation 45)
(Equation 46)
(Equation 47)
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