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Section 11
Testing functionality by secondary injection
4.
Change the magnitude and angle of three phase voltages to achieve the impedances at test
points P1, P2,...., P28.
5.
For test points P1 to P14, observe the operation value for the signal ZOUT and compare the
operation value with the set value.
6.
For test points P15 to P28, observe the operation value for the signal ZIN and compare the
operation value with the set value.
Testing the power swing detection logic ZMBURPSB
Preconditions
The following output signals shall be configured to binary outputs: ZOUT, measured impedance
within outer impedance boundary and ZIN, measured impedance within inner impedance boundary
and START, power swing detection.
1.
Set X1InFw, R1LIn, X1InRv, R1FInFw, R1FInRv, ArgLd, RLdOutFw, RLdOutRv, kLdRFw and
kLdRRv to values that are in accordance with the selectivity plan and the corresponding
operating characteristic is shown in Figure 38.
2.
Set OperationLdCh to On and set timers tP1, tP2, tW and tH to their default values.
3.
Enable the input signal REL1PH to detect the power swing in one of the three phases.
4.
The test points that are to be considered for the power swing detection are shown in Figure 38.
IEC18000100 V1 EN-US
Figure 38:
Where,
φ =
5.
Inject voltage in one of the three phases in accordance with the test point P1 by keeping
constant current in three phases throughout testing and maintaining rated voltage for the other
two phases.
126
X1OutFw
X1InFw
X1InRv
X1OutRv
Proposed test points to detect power swing conditions
-1
tan
(X1InFw/R1LIn)
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P3
P2
RLdInRv
RLdInFw
RLdOutFw
RLdOutRv
1MRK 505 378-UEN Rev. K
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IEC18000100-2-en.vsdx
Line differential protection RED670
Commissioning manual
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