IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
NOTE:
This option can be used e.g. for elimination of the droop at
governors that do not support isochronous mode.
MINT, COX: This option activates the frequency regulation loop
also while the gen-set is running without load The controller
maintains frequency at it's nominal value adjusted by the system
frequency (Nominal Freq + Nom frq offset).
The P and I factors of the frequency regulation loop are adjusted by setpoints
Freq gain and Freq int.
Setpoint: Angle Gain
This setpoint is used for adjusting of the gain factor (P-factor) of the phase angle
P-control loop.
The synchronizing process contains two following steps:
1. The first step is to match the generator frequency to the mains frequency.
In this step the frequency regulation loop (Freq reg loop) is active.
2. The following step is to match the phase angle difference of the mains
and generator voltages to the setpoint GtoM AngleReq. The angle
regulation loop is active in this step.
As soon as the phase angle difference stays within the window adjusted by Phase
window and the voltage difference stays in the Voltage window, both for period
Dwell time, the circuit breaker closing command is issued.
NOTE:
See the chapter Regulation loops overview for general information about
regulation loops and their adjustment.
Setpoint: Speed gov bias
SpeedGovLowLim .. SpeedGovHiLim [V]
This setpoint adjusts the initial voltage level for the speed governor output, which
is present on the output, if no speed or power regulation loop is active.
Setpoint: SpdGovPWM rate
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