ABB Relion 650 Series Technical Manual page 231

1MRK 506 326-UUS B
6.15.3.5 Monitored data
Table 155: GUPPDUP (37) Monitored data
Name
P
PPERCENT
Q
QPERCENT
6.15.4 Operation principle
A simplified scheme showing the principle of the power protection function is shown in figure 119.
The function has two stages with individual settings.
Chosen current
phasors
Chosen voltage
phasors
ANSI06000438 V2 EN-US
Figure 119: 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 156.
Line distance protection REL650
Technical manual
Type Values (Range)
REAL -
REAL -
REAL -
REAL -
P
Complex Derivation of
S( composant)
power
in Char angle
calculation
Q
© Copyright 2011 ABB Power Grids. All rights reserved
Unit Description
MW Active Power
% Active power in % of calculated power
base value
MVAr Reactive power
% Reactive power in % of calculated power
base value
S( angle)
S( angle ) <
Power1
S( angle ) <
Power2
ANSI06000438-2-en.vsd
Section 6
Current protection
PID-2724-MONITOREDDATA v5
SEMOD172136-4 v4
t TRIP 1
0
PICKUP1
t TRIP2
0
PICKUP2
P = POWRE
Q = POWIM
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