ABB RELION 670 Series Commissioning Manual page 111

1MRK 511 366-UUS A
The trajectory of the impedance traverses the lens characteristic in zone 1
Preliminary steady state test at 50 Hz
• Go to Main menu/Test/Function status/Impedance protection/OutOfStep(78,Ucos)/
OOSPPAM(78,Ucos):1/Outputs to check the available service values of the function block
OOSPPAM.
• Apply the following three-phase symmetrical quantities (the phase angle is related to phase
L1):
V
=
ts
EQUATION14066 V1 EN-US
V
∠
ts
EQUATION14058 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
∠ I
50s
frequency of
It
fs
EQUATION14062 V1 EN-US
∠ I
tfs
frequency of
• Check that the service values (VOLTAGE, CURRENT, R(%), X(%)) are according to the injected
quantities and that ROTORANG is close to 3.14 rad. For this particular injection the service
values are:
•
•
•
•
•
Note that these values identify a point inside the lens characteristic in zone 1, that is close to
the boundary between zone 1 and zone 2. The START is issued, but no TRIP is performed.
Execution of the dynamic test
The test may be performed by using two states of a sequence tool that is a basic feature of test
sets.
• State 1: pre-test condition.
Steady voltage and current are applied in order to get a steady high impedance, that is a point
in the plane R-X which is far away from the lens characteristic. Define the following three-
phase symmetrical quantities (the phase angle is related to phase L1):
Commissioning manual
V
VT s ,
0 9 . V 0 9 1435 .
× × = ×
t RZ , 1
V
VT p ,
ForwardX
 
arctan arctan
=  =

ForwardR
 
= 50 Hz
ts
I 1
CTs
I 10459
= × = ×
50
I
9000
CTp
= 0º
I
= 50 Hz
50s
I 1
CTs
I 10459
= × = ×
tf
I
9000
CTp
= 0º
I
= 50 Hz
tf
VOLTAGE = 1.29 kV
CURRENT = 20918 A
R = 0.89%
X=6.42%
ROTORANG = -3.04 rad
0 1 .
9 36 . V
× =
13 8 .
59 33 .
 
82. . 14°
 =

8 19 .
 
= . 1 162 A
1 162 . A
=
Testing functionality by secondary injection
GUID-12F82DD8-A4CE-48C9-944B-0CF3B3F6C9F9 v1
GUID-AA953F5F-2389-4F05-8BBD-D8DC9AF3B0E4 v1
(Equation 47)
(Equation 48)
(Equation 49)
(Equation 50)
GUID-98707DB3-9A1A-4458-9704-25F8FCB94B79 v1
Section 11
105