ABB REG670 Applications Manual page 392

Section 9
Current protection
386
Operate
IEC06000557 V2 EN
Figure 200: For reverse power the set angle should be 180° in the overpower
function
TripDelay1(2) is set in seconds to give the time delay for trip of the stage after pick up.
Hysteresis1(2) is given in p.u. of generator rated power according to equation 236.
= × ×
S 3 UBase IBase
N
EQUATION1708 V1 EN
The drop out power will be Power1(2) - Hysteresis1(2).
The possibility to have low pass filtering of the measured power can be made as shown
in the formula:
( )
= × + - ×
S k S 1 k S
Old Calculated
EQUATION1893 V1 EN
Where
S is a new measured value to be used for the protection function
S is the measured value given from the function in previous execution cycle
old
S is the new calculated value in the present execution cycle
Calculated
k is settable parameter
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Q
Angle1(2 ) = 180
Power 1(2)
IEC06000557-2-en.vsd
1MRK 502 071-UEN -
o
P
(Equation 236)
(Equation 237)
Application manual