Hitachi Relion 670 Series Commissioning Manual page 146

Section 11
Testing functionality by secondary injection
Expected result: start of the protection function and trip in zone 1 when trip conditions are fulfilled.
11.4.12.4 Test of the point SE (R
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
EQUATION14067 V1 EN-US
Ð
V
EQUATION14068 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
∠I
50s
frequency of I
It
fs
EQUATION14062 V1 EN-US
∠I
tfs
frequency of I
• 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
point SE. 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.
140
RvsR
V
VT s ,
0 9 . V 0 9 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
= 50 Hz
50s
I 1
CTs 10459
I
= × = ×
tf
I 9000
CTp
= 0º
= 50 Hz
tf
VOLTAGE = 5.31 kV
CURRENT = 20918 A
R = -0.26%
X = -26.65%
ROTORANG = -3.06 rad
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, X )
RvsX
0 1 .
38 47 . V
× =
13 8 .
æ ö
29.60
° = -
ç ÷
arctan 180
è ø
0.29
= . 1 162 A
1 162 .
A
=
1MRK506371-UUS Rev. M
GUID-335F54E6-52DE-4BF1-A34B-0C2DB8059CC1 v1
GUID-2DD20D2E-6188-4631-A584-5E68B212E011 v1
GUID-7BCF3D7B-1B84-46D4-B9E3-066894A878E8 v1
° = - °
90.56
GUID-FF6DCD5B-96AA-4255-8740-B85C8C7148F5 v1
Line distance protection REL670
Commissioning manual
(Equation 57)
(Equation 58)
(Equation 59)
(Equation 60)