Table of Contents
Advertisement
Section 11
Testing functionality by secondary injection
Set value: Mode
L1
L2
L3
2.
Adjust the injected current and voltage to the set values in % of IBase and UBase (converted to
secondary current and voltage). The angle between the injected current and voltage shall be
set equal to the set direction Angle1, angle for stage 1 (equal to 0° for low forward power
protection and equal to 180° for reverse power protection). Check that the monitored active
power is equal to 100% of rated power and that the reactive power is equal to 0% of rated
power.
3.
Change the angle between the injected current and voltage to Angle1 + 90°. Check that the
monitored active power is equal to 0% of rated power and that the reactive power is equal to
100% of rated power.
4.
Change the angle between the injected current and voltage back to 0°. Decrease the current
slowly until the START1 signal, start of stage 1, is activated.
5.
Increase the current to 100% of IBase.
6.
Switch the current off and measure the time for activation of TRIP1, trip of stage 1.
7.
If a second stage is used, repeat steps
11.5.13.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.14
Directional overpower protection GOPPDOP
Prepare the IED for verification of settings as outlined in section
section
11.5.14.1
Verifying the settings
The overpower protection shall be set to values according to the real set values to be used. The test
is made by means of injection of voltage and current where the amplitude of both current and voltage
and the phase angle between the voltage and current can be controlled. During the test the analog
outputs of active and reactive power shall be monitored.
1.
Connect the test set for injection of voltage and current corresponding to the mode to be used
in the application. If a three phase test set is available this could be used for all the modes. If a
single phase current/voltage test set is available the test set should be connected to a selected
input for one phase current and voltage.
2.
Adjust the injected current and voltage to the set rated values in % of IBase and UBase
(converted to secondary current and voltage). The angle between the injected current and
voltage shall be set equal to the set direction Angle1, angle for stage 1 (equal to 0° for low
forward power protection and equal to 180° for reverse power protection). Check that the
180
"Preparing for test"
in this chapter.
© 2017 - 2022 Hitachi Energy. All rights reserved
Formula used for complex power calculation
*
= ×
×
S
3
U
I
L
1
L
1
EQUATION1703 V1 EN-US
*
= ×
×
S
3
U
I
L
2
L
2
EQUATION1704 V1 EN-US
*
= ×
×
S
3
U
I
L
3
L
3
EQUATION1705 V1 EN-US
2
to
6
for the second stage.
1MRK 504 165-UEN Rev. K
"Requirements"
and
Transformer protection RET670
Commissioning manual
(Equation 90)
(Equation 91)
(Equation 92)
SEMOD175027-15 v4
SEMOD175058-3 v5
SEMOD175058-7 v6
Advertisement
Table of Contents
