Parallel Voltage Regulation - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
V
L
EQUATION2081-ANSI V2 EN-US
where:
V
L
When all secondary phase-to-ground voltages are available, use the positive-sequence
components of voltage and current. By separation of real and imaginary parts:
vl re vb re rline il re ,
EQUATION2083-ANSI V1 EN-US
vl im vb im ,
EQUATION2085-ANSI V1 EN-US
where:
vb
il
rline
xline
For comparison with the set-point value, the modulus of U
¦ V
EQUATION2087-ANSI V2 EN-US
4. Inject voltage for V
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
voltage deadband limits
9. While injecting rated current
then
VSet , and hence no tap change command should be issued from the IED.
10. Reduce the injected voltage for V
the calculated value for load voltage is below
the IED.
10.10.3.8

Parallel voltage regulation

Commissioning manual
= VB - (Rline + jXline) . I
, I = Re(I ) + jlm(I ) are complex phase quantities
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
¦ = (vl , re) + (vl , im)
L
equal to setting
B
OperationLDC set to Enabled , the voltage regulation algorithm uses the
VDeadband and VDeadbandInner .
VSet + |( Rline +j XLine ) · I
L
×
,
×
,
VSet .
I2Base .
I2Base into the IED, inject a quantity for V
|. This will ensure that the regulating voltage V
L
slightly below VSet + |( Rline +j XLine ) · I
B
VSet and a tap change command is issued from
Testing functionality by secondary injection
(Equation 113)
(Equation 114)
(Equation 115)
are according to equation 116.
L
(Equation 116)
VSet and the
that is slightly higher
B
is higher than
L
| and confirm that
L
Section 10
SEMOD175185-714 v2
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