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1MRK 502 071-UUS A
9.10.3
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
Underpower protection
Q
Operate
Line
Margin
P
Operating point
without
turbine torque
IEC09000019 V2 EN-US
Figure 195:
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 41.
Table 41:
Complex power calculation
Mode
Set value
A, B, C
Arone
PosSeq
AB
BC
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
=
S
V
BC
EQUATION2059-ANSI V1 EN-US
Current protection
*
*
×
+
×
+
×
I
V
I
V
I
A
B
B
C
C
(Equation 206)
*
*
×
-
×
I
V
I
A
BC
C
(Equation 207)
*
×
I
PosSeq
PosSeq
(Equation 208)
*
*
×
-
(
I
I
)
A
B
(Equation 209)
*
*
×
-
(
I
I
)
B
C
(Equation 210)
Section 9
SEMOD172134-4 v7
*
407
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