ComAp IG-NT - Page 100

IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
100
Description
The setpoint is used for selection of the power factor control mode in parallel to
mains operation.
 BASEPF: Gen-set power factor is maintained at constant level adjusted
by the setpoint Base PF.
 PF-IM/EX: Gen-set power factor is controlled so, that the mains power
factor is maintained constant at the level adjusted by setpoint Import PF.
 ANEXT BASEPF: Gen-set power factor is maintained at constant level
given by the analog input PFCtrl:AnExBPF. This option is available in IS-
NT only.
 ANEXT PF-IM/EX: Gen-set load is controlled so, that the mains power
factor is maintained constant at the level given by the analog input
PFCtrl:AnExI/E. This option is available in IS-NT only.
Setpoint: I/E-Pm meas
Group
Process Control
Range [units]
NONE, IM3 CT INPUT, ANALOG INPUT [-]
Related FW
3.0
Description
This setpoint is used to select, which method is used for measurement of the
active power (P) imported from the mains.
 NONE: Active power from the mains is not measured.
 IM3 CT INPUT: Active power from the mains is calculated from the mains
L3-N voltage and the current measured at the controller Im3 terminal and
then multiplied by 3.
 ANALOG INPUT: Active power from the mains is measured by an
external device and passed the controller via analog input LdCtrl:I/E-Pm.
NOTE:
If the mains import is not measured or measured externally, the Im3 terminal can
be used for Earth fault current protection This protection is present in default
archive and should be removed in GenConfig (Protections tab) if the Im3 input is
used for mains import measurement.
Setpoint: I/E-Qm meas
Group
Process Control
Range [units]
NONE, IM3 CT INPUT, ANALOG INPUT [-]
Related FW
3.0
Description
This setpoint is used to select, which method is used for measurement of the
reactive power (Q) imported from the mains.
 NONE: Reactive power from the mains is not measured.
NOTE:
It is possible to perform import/export load control without reactive power
measurement, i.e. based on active power measuement only. The gen-set
power factor will be maintained at constant level given by Base PF
setpoint. However, this kind of operation may lead in certain conditions to
bad power factor values at the mains.