ABB REG650 User Manual

7.4.7.5 Design
When the complex impedance Z(R, X) enters the limit-of-reach region, the algorithm
determines the direction impedance Z moves, that is, the direction the lens is traversed
and measures the time taken to traverse the lens from one side to the other. If the
traverse time is more than the limit 40 or 50 ms, a pole-slip is declared. If the complex
impedance Z(R, X) exits the lens on the same side it entered, then it is a stable case and
the protected machine is still in synchronism. If a pole-slip has been detected, then it
is determined in which zone the centre of oscillation is located. If the number of actual
pole-slips exceeds the maximum number of allowed pole-slips in either of the zones,
a trip command is issued taking care of the circuit breaker safety.
IEC10000116-2-en.vsd
GENMODE
Calculation o
f
R and X parts
of the complex
positive -
sequence
impedance
Z(R, X)
UPSRE
UPSIM
UPSMAG
R
IPSRE
IPSIM
Z(R,X)
Z(R,X)
within limit o
f
reach?
X
NO
Return
YES
Z(R,X)
within lens
characteristic?
NO
YES
Z(R,X)
entered lens
from?
Function aler
t
RIGHT
LEFT
Z(R,X)
exited lens
on the lef
t
-hand
side?
NO
YES
YES (pole-slip!)
Was
traverse time
more than
50 ms?
Motor losing
step ?
Generator losing
step ?
NO
X
R
Calculation o
f
positive -sequence
active power P,
reactive power Q,
roto
r
angle
ROTORANG
and
UCOSPHI
P
Q
ROTORANG
>= 1
Numbe
r
of pole-slips
exceeded in
a zone?
ZONE 1
ZONE 2
Open
circuit
breake
r
safely
TRIP
TRIPZ1
TRIPZ2
UCOSPHI
P
Q
UCOSPHI
ROTORANG
SLIPFREQ
GENMODE
MOTMODE
NO
Calculation o
f
R and X parts
of the complex
positive -
sequence
impedance
Z(R, X)
UPSRE
UPSIM
UPSMAG
R
IPSRE
IPSIM
Z(R,X)
Z(R,X)
within limit o
f
reach?
X
NO
Return
YES
Z(R,X)
within lens
characteristic?
NO
YES
Z(R,X)
entered lens
from?
Function aler
t
RIGHT
LEFT
Z(R,X)
exited lens
on the lef
t
-hand
side?
NO
YES
YES (pole-slip!)
Was
traverse time
more than
50 ms?
Motor losing
step ?
Generator losing
step ?
NO
X
R
Calculation o
f
positive -sequence
active power P,
reactive power Q,
roto
r
angle
ROTORANG
and
UCOSPHI
P
Q
ROTORANG
>= 1
Numbe
r
of pole-slips
exceeded in
a zone?
ZONE 1
ZONE 2
Open
circuit
breake
r
safely
TRIP
TRIPZ1
TRIPZ2
UCOSPHI
P
Q
UCOSPHI
ROTORANG
SLIPFREQ
MOTMODE
NO
IEC10000116 V2 EN
Figure 83: OOSPPAM Simplified function block
7.4.8 Technical data
Table 77: OOSPPAM technical data
Function
Range or value Accuracy
Impedance reach (0.00–1000.00)% of Zbase ± 2.0% of Ur/Ir
Characteristic angle (72.00–90.00) degrees ± 5.0 degrees
Start and trip angles (0.0–180.0) degrees ± 5.0 degrees
Zone 1 and Zone 2 trip counters (1-20) -
Section 7 1MRK 502 048-UEN A
Impedance protection
172
Technical manual

ABB REG650 Specifications

General

Brand	ABB
Model	REG650
Category	Protection Device
Language	English