Parallel Voltage Regulation - ABB Relion 670 Series Commissioning Manual

1MRK 504 165-UEN E
EQUATION2080 V3 EN-US
where:
U
When all secondary phase-to-earth voltages are available, use the positive-sequence
components of voltage and current. By separation of real and imaginary parts:
ul re ub re rline il re
EQUATION2082 V1 EN-US
ul im ub im
EQUATION2084 V1 EN-US
where:
ub
il
rline
xline
For comparison with the set-point value, the modulus of U
equation 114.
¦ U
EQUATION2086 V2 EN-US
4. Inject voltage for U
5. Inject current equal to rated current
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
calculated value for load voltage as the regulating quantity to compare against
the voltage deadband limits
9. While injecting rated current
higher then
higher than
10. Reduce the injected voltage for U
that the calculated value for load voltage is below
issued from the IED.
11.10.3.8

Parallel voltage regulation

Master follower voltage regulation
Transformer protection RET670
Commissioning manual
, I = Re(I ) + jlm(I ) are complex phase quantities
L L L L
= - × +
, , , xline il im
= - × -
, , xline il re rline il im ,
is the complex value of the busbar voltage
is the complex value of the line current (secondary side)
is the value of the line resistance
is the value of the line reactance
2 2
¦ = (ul , re) + (ul , im)
L
equal to setting
B
OperationLDC set to On , the voltage regulation algorithm uses the
USet + |( Rline +j XLine ) · I
USet , and hence no tap change command should be issued from the IED.
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×
,
×
,
USet .
I2Base .
UDeadband and UDeadbandInner .
I2Base into the IED, inject a quantity for U
|. This will ensure that the regulating voltage U
L
USet + |( Rline +j XLine ) · I
slightly below
B
USet and a tap change command is
Testing functionality by secondary injection
(Equation 111)
(Equation 112)
(Equation 113)
are according to
L
(Equation 114)
USet and
that is slightly
B
| and confirm
L
SEMOD175185-714 v2
Section 11
is
L
SEMOD175185-716 v7
223