Setting Guidelines - ABB REC670 Applications Manual

Section 8
Current protection
8.12.3
216
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-US
Figure 86: 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 as applicable.
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 26.
Table 26: Complex power calculation
Set value Mode
A, B, C
Arone
PosSeq
AB
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-US
=
S V
AB
EQUATION2056-ANSI V1 EN-US
= ×
S 3 V
EQUATION2057-ANSI V1 EN-US
=
S V
AB
EQUATION2058-ANSI V1 EN-US
1MRK 511 401-UUS A
* *
× + × + ×
I V I V I
A B B C C
* *
× - ×
I V I
A BC C
*
×
I
PosSeq PosSeq
* *
× -
( I I )
A B
Bay control REC670 2.2 ANSI
Application manual
SEMOD172134-4 v7
*
(Equation 64)
(Equation 65)
(Equation 66)
(Equation 67)