Parallel Voltage Regulation - ABB RELION REG670 Commissioning Manual

Section 12
Testing functionality by secondary injection
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 118.
¦ 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.
12.10.3.8

Parallel voltage regulation

Master follower voltage regulation
216
, 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.
×
,
×
,
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
1MRK 502 067-UEN B
(Equation 115)
(Equation 116)
(Equation 117)
are according to
L
(Equation 118)
USet and
that is slightly
B
| and confirm
L
SEMOD175185-714 v2
SEMOD175185-716 v6
Commissioning manual
is
L