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(reference angle set to 180) to trip if the power flow from the network to the
generator is higher than 1%.
Underpower protection
Overpower protection
Q
Q
P
P
Operating point
without
turbine torque
Margin
Margin
Operate
Line
Operate
Line
Operating point
without
turbine torque
IEC09000019-2-en.vsd
IEC09000019 V2 EN-US
Figure 65:
Reverse power protection with underpower or overpower
protection
8.6.3
Setting guidelines
SEMOD172134-4 v7
GlobalBaseSel
: Selects the global base value group used by the function to define
IBase
,
UBase
and
SBase
as applicable.
Operation
: With the parameter
Operation
the function can be set
On
/
Off
.
Mode
: The voltage and current used for the power measurement. The setting
possibilities are shown in table
.
Table 18:
Complex power calculation
Set value
Mode
Formula used for complex power calculation
L1, L2, L3
*
*
*
1
1
2
2
3
3
L
L
L
L
L
L
S
U
I
U
I
U
I
=
×
+
×
+
×
EQUATION1697 V1 EN-US
(Equation 56)
Arone
*
*
1 2
1
2 3
3
L L
L
L L
L
S
U
I
U
I
=
×
-
×
EQUATION1698 V1 EN-US
(Equation 57)
PosSeq
*
3
PosSeq
PosSeq
S
U
I
= ×
×
EQUATION1699 V1 EN-US
(Equation 58)
L1L2
*
*
1 2
1
2
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1700 V1 EN-US
(Equation 59)
L2L3
*
*
2 3
2
3
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1701 V1 EN-US
(Equation 60)
Table continues on next page
Section 8
1MRK 511 407-UEN C
Current protection
162
Phasor measurement unit RES670 2.2 IEC
Application manual
Содержание Relion RES670
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