, , , ,ul re ub re rline il re xline il im= - × + ×
EQUATION2082 V1 EN-US (Equation 11)
, , , ,ul im ub im xline il re rline il im= - × - ×
EQUATION2084 V1 EN-US (Equation 12)
where:
ub is the complex value of the busbar voltage
il is the complex value of the line current (secondary side)
rline is the value of the line resistance
xline is the value of the line reactance
For comparison with the set-point value, the modulus of U
L
are according to
equation 13.
¦ U
L
¦ = (ul , re)
2
+ (ul , im)
2
EQUATION2086 V2 EN-US (Equation 13)
4. Inject voltage for U
B
equal to setting USet.
5. Inject current equal to rated current I2Base.
6. Confirm on the local HMI that service values for bus voltage and load current
are equal to injected quantities.
7. Confirm that the calculated value for load voltage, displayed on the local
HMI, is equal to that derived through hand calculations.
8. When setting OperationLDC set to On, the voltage regulation algorithm uses
the calculated value for load voltage as the regulating quantity to compare
against USet and the voltage deadband limits UDeadband and
UDeadbandInner.
9. While injecting rated current I2Base into the IED, inject a quantity for U
B
that is slightly higher then USet + |(Rline+jXLine) · I
L
|. This will ensure that
the regulating voltage U
L
is higher than USet, and hence no tap change
command should be issued from the IED.
10. Reduce the injected voltage for U
B
slightly below USet + |(Rline+jXLine) · I
L
|
and confirm that the calculated value for load voltage is below USet and a tap
change command is issued from the IED.
10.9.4.8 Parallel voltage regulation
SEMOD175185-714 v2
Master follower voltage regulation
SEMOD175185-716 v7
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 147
Commissioning manual
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