Setting Guidelines - ABB RELION 670 Series Applications Manual

Section 8
Current protection
synchronization may be higher. One should set the underpower 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
Operate
Line
Margin
Operating point
without
turbine torque
IEC09000019 V2 EN-US
Figure 266: Reverse power protection with underpower or overpower protection
8.11.3

Setting guidelines

GlobalBaseSel : Selects the global base value group used by the function to define ( IBase ),
UBase ) and ( SBase ).
(
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 41.
Table 41:
Set value
L1, L2, L3
Arone
PosSeq
L1L2
L2L3
L3L1
Table continues on next page
440
Overpower protection
Q
Operate
Line
Margin
P
Operating point
without
turbine torque
Complex power calculation
Mode
Q
P
IEC09000019-2-en.vsd
Formula used for complex power calculation
*
= × +
S U I U
L 1 L 1 L
EQUATION1697 V1 EN-US
*
= × -
S U I U
L L 1 2 L 1
EQUATION1698 V1 EN-US
= × ×
S 3 U I
PosSeq PosSeq
EQUATION1699 V1 EN-US
*
= × -
S U ( I
L L 1 2 L 1
EQUATION1700 V1 EN-US
*
= × -
S U ( I
L L 2 3 L 2
EQUATION1701 V1 EN-US
*
= × -
S U ( I
L L 3 1 L 3
EQUATION1702 V1 EN-US
1MRK 504 152-UEN B
* *
× + ×
I U I
2 L 2 L 3 L 3
(Equation 463)
*
×
I
L L 2 3 L 3
(Equation 464)
*
(Equation 465)
*
I )
L 2
(Equation 466)
*
I )
L 3
(Equation 467)
*
I )
L 1
(Equation 468)
Application manual
SEMOD172134-4 v7