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Section 11
Testing functionality by secondary injection
Verifying the settings by secondary injection
It is advised to connect the analog output channels of the function block OOSPPAM to the internal
disturbance recorder (and in particular to the function block A4RADR) in order to perform a better
analysis of the tests.
If the device is in test mode, the recording of the disturbances are enabled by the setting in Main
menu /Settings /IED Settings /Monitoring /Disturbance report /DisturbanceReport /
DRPRDRE:1: set the parameter OpModeTest to On.
1.
Check the Application Configuration: verify that hardware voltage and current channels of the
IED are properly connected to SMAI function blocks, and that the proper analog outputs of
SMAI's are connected to the analog inputs of the function block OOSPPAM.
2.
Connect three-phase voltage channels of the test set to the appropriate IED terminals.
3.
Connect in parallel two groups of three-phase currents of the test set to the appropriate IED
terminals.
4.
Connect the appropriate trip output of the IED to the input channel of the test set that monitors
the trip.
5.
Go to Main menu /Settings /IED Settings /Impedance protection /OutOfStep(78,Ucos) /
OOSPPAM(78,Ucos):1 , and make sure that the function is enabled, that is, Operation is set to
On.
11.4.12.2
Test of point RE (R
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
EQUATION14057 V1 EN-US
∠
V
EQUATION14058 V1 EN-US
frequency of V
138
When the trajectory of the impedance, that is seen by the protection function,
traverses the lens characteristic then a pole slipping is detected. The present
procedure avoids tests of points of the line SE-RE that are too close to the R-axis
because in that case the voltage is close to zero and, therefore, the impedance may
approach a non-defined quantity 0/0.
The accuracy of the impedance reach is ±2% of the base impedance; that is
considered while evaluating the test results.
For the test as motor the frequency current may have 50.5 Hz in the quadrant 1 and
2 of the R-X plane and 49.5 Hz in the quadrant 3 and 4.
, X
FwdR
V
VT s
,
1 1
.
V
1 1 11931
.
=
×
×
=
×
t FwdZ
,
V
VT p
,
ForwardX
=
=
arctan
ts
ForwardR
= 50 Hz
ts
© 2017 - 2022 Hitachi Energy. All rights reserved
)
FwdX
0 1
.
95 1
.
V
×
=
13 8
.
59 33
.
=
arctan
82. . 14°
8 19
.
1MRK 505 378-UEN Rev. K
GUID-1752CE04-7C0F-4D37-9602-B22D8096DD2D v1
GUID-911D370F-8767-4D6C-9621-8663DD26006C v1
GUID-5C5E9BEB-AA60-474E-ACEC-B972ACFE6FA2 v1
GUID-8F95CCCC-3282-48E8-9F5E-3F3E77CCCAAE v1
(Equation 20)
(Equation 21)
Line differential protection RED670
Commissioning manual
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