Testing The Synchrocheck Functionality - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Testing the frequency difference
The frequency difference test should verify that operation is achieved when the frequency
difference between bus and line is less than set value of
FreqDiffMin . The test procedure below will depend on the settings used. Input STARTSYN
must be activated during the test.
FreqDiffMax = 50.2 Hz
FreqDiffMin = 50.01 Hz
tBreaker = 0.080 s
1. Apply voltages
1.1.
1.2.
2. Check that a closing pulse is submitted at a closing angle equal to calculated phase angle
value from the formula below. Modern test sets will evaluate this automatically.
Closing Angle = |( (f
f
Bus
f
Line
tBreaker = Set closing time of the breaker
3. Repeat with
3.1.
4. Verify that the closing command is not issued when the frequency difference is less than
the set value
11.9.1.2

Testing the synchrocheck functionality

During the test of SESRSYN for a single bay arrangement, these voltage inputs are used:
U-Line
U-Bus
Testing the voltage difference
Set the voltage difference to 0.15 p.u. on the local HMI, and the test should check that
operation is achieved when the voltage difference
The settings used in the test shall be final settings. The test shall be adapted to site setting
values instead of values in the example below.
Test with no voltage difference between the inputs.
Test with a voltage difference higher than the set
1. Apply voltages U-Line (for example) = 80%
GblBaseSelBusGblBaseSelBus with the same phase-angle and frequency.
2. Check that the AUTOSYOK and MANSYOK outputs are activated.
3. The test can be repeated with different voltage values to verify that the function
operates within the set
than the other.
4. Increase the U-Bus to 110%
also the opposite condition.
5. Check that the two outputs for manual and auto synchronism are not activated.
144
UBaseLine and f-Line = 50.0 Hz
U-Line = 100%
UBaseBus and f-Bus = 50.15Hz
U-Bus = 100%
– f
Bus Line
= Bus frequency
= Line frequency
UBaseBus and f-bus = 50.25 Hz, to verify that the function does not
U-Bus = 100%
operate when frequency difference is above limit.
FreqDiffMin .
UL1, UL2 or UL3 line 1 voltage input on the IED according to the connection in
SMT
Bus voltage input on the IED according to the connection in SMT
UDiffSC . Check with both U-Line and U-Bus respectively lower
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) * tBreaker * 360 degrees) |
UDiffSC is lower than 0.15 p.u.
UDiffSC .
GblBaseSelLine and U-Bus = 80%
GblBaseSelBus , and the U-Line = 90% GblBaseSelLine and
FreqDiffMax and above set value of
Bay control REC670
Commissioning manual
1MRK 511 403-UEN E
M2377-116 v11
M2377-132 v9
M2377-194 v8