Setting Guidelines - ABB Relion 670 Series Applications Manual

Section 7
Current protection
Operate
Line
Margin
Operating point
without
turbine torque
IEC06000315 V2 EN-US
Figure 86: Reverse power protection with underpower IED and overpower IED
7.14.3

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 22.
Table 22:
Set value
A,B,C
Arone
PosSeq
A,B
B,C
C,A
Table continues on next page
186
Underpower IED
Q
Operate
Line
Margin
P
Operating point
without
turbine torque
Complex power calculation
Mode
Overpower IED
Q
P
IEC06000315-2-en.vsd
Formula used for complex power calculation
*
= × +
S V I V
A A
EQUATION2038 V1 EN-US
*
-
= ×
S V I
AB A
EQUATION2039 V1 EN-US
= × ×
S 3 V I
PosSeq PosSeq
EQUATION2040 V1 EN-US
*
-
= ×
S V (I
AB A
EQUATION2041 V1 EN-US
*
-
= ×
S V (I
BC B
EQUATION2042 V1 EN-US
*
-
= ×
S V (I
CA C
EQUATION2043 V1 EN-US
* *
× + ×
I V I
B B C C
*
×
V I
BC C
*
*
)
I
B
*
)
I
C
*
)
I
A
1MRK 511 358-UUS A
SEMOD172150-4 v7
(Equation 78)
(Equation 79)
(Equation 80)
(Equation 81)
(Equation 82)
(Equation 83)
Application manual