ABB Relion RES670, Техническое руководство

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ANSI06000567-2-en.vsd
Chosen current
phasors
Chosen voltage
phasors
Complex
power
calculation
P
Derivation of
S(composant)
in Char angle
S(angle)
S(angle) >
Power1
t TRIP1
PICKUP1
Q
P = POWRE
Q = POWIM
S(angle) >
Power2
t TRIP2
PICKUP2
ANSI06000567 V2 EN-US
Figure 85: Simplified logic diagram of the power protection function
The function will use voltage and current phasors calculated in the pre-processing
blocks. The apparent complex power is calculated according to chosen formula as
shown in table
146 .
Table 146: Complex power calculation
Set value:
Mode
Formula used for complex power calculation
A,B,C
* * *
A B C A B C
S V I V I V I
= × + × + ×
EQUATION2038 V1 EN-US
(Equation 38)
Arone
* *
A C AB BC
S V I V I
= × ×
-
EQUATION2039 V1 EN-US
(Equation 39)
PosSeq
*
PosSeq PosSeq
S 3 V I
= × ×
EQUATION2040 V1 EN-US
(Equation 40)
A,B
*
A B AB
*
S V (I I
)
= ×
-
EQUATION2041 V1 EN-US
(Equation 41)
B,C
*
B C BC
*
S V (I I
) = ×
-
EQUATION2042 V1 EN-US
(Equation 42)
Table continues on next page
1MRK 511 408-UUS A
Section 8
Current protection
Phasor measurement unit RES670 2.2 ANSI 265
Technical manual