ABB RET670 Commissioning Manual page 136

Section 10
Testing functionality by secondary injection
The trajectory of the impedance does not enter the lens characteristic
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
EQUATION14069 V1 EN-US
Ð
V
EQUATION14068 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 0 rad. For this particular injection the service values
are:
•
•
•
•
•
Note that these values identify a point outside the lens characteristic, even if it is close to the
point SE. Neither START nor TRIP is issued.
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):
130
V
VT s ,
1 1 . V 1 1 5899 .
× × = ×
t RvsZ ,
V
VT p ,
æ ö
ReverseX
= ç ÷ -
arctan 180
è ø
ts
ReverseR
= 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= 6.49 kV
CURRENT= 20918 A
R= –0.32%
X=–32.57%
ROTORANG= 0.08 rad
0 1 .
47 02 . V
× =
13 8 .
æ ö
29.60
° = ç ÷ -
arctan 180
è ø
0.29
= . 1 162 A
1 162 . A
=
GUID-189FECED-12A7-4A41-BCCF-D93C0FF9FA41 v1
GUID-448D5357-6CC2-438E-83CA-25FD381B7DFF v1
° = - °
90.56
GUID-31EF4F76-8FC8-4952-896C-B3A8A5FD635A v1
Commissioning manual
1MRK 504 154-UUS B
(Equation 67)
(Equation 68)
(Equation 69)
(Equation 70)