Basler Electric DECS-250N - Manual (Page 122)

106 9440500990 Rev D
Stability Tuning DECS-250N
Other Modes and Functions
BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Gain, var, PF, OEL, UEL,
SCL, VAR Limiter
HMI Navigation Path: Settings, Operating Settings, Gains, Other Gains
Settings for stability tuning of the Var and Power Factor modes are provided in the DECS-250N along
with settings for stability tuning of limiters, the voltage matching function, and main field voltage response.
Figure 102 illustrates these settings as they appear in BESTCOMSPlus.
Var Mode
The integral gain (Ki) A adjusts the Var mode integral gain which determines the characteristic of the
DECS-250N dynamic response to a changed var setpoint.
The loop gain (Kg) B adjusts the coarse loop-gain level of the PI algorithm for var control.
Power Factor Mode
The integral gain (Ki) C adjusts the integral gain which determines the characteristic of the DECS-250N
dynamic response to a changed power factor setpoint.
The loop gain (Kg) D adjusts the coarse loop-gain level of the PI algorithm for power factor control.
Overexcitation Limiter (OEL)
The integral gain (Ki) E adjusts the rate at which the DECS-250N responds during an overexcitation
condition.
The integral loop gain (Kg) F adjusts the coarse loop-gain level of the PI algorithm for the overexcitation
limiter function.
Underexcitation Limiter (UEL)
The integral gain (Ki) G adjusts the rate at which the DECS-250N responds during an underexcitation
condition.
The loop gain (Kg) H adjusts the coarse loop-gain level of the PI algorithm for the underexcitation limiter
function.
Stator Current Limiter (SCL)
The integral gain (Ki) I adjusts the rate at which the DECS-250N limits stator current.
The loop gain (Kg) J adjusts the coarse loop-gain level of the PI algorithm for the stator current limiter
function.
Var Limiter
The integral gain (Ki) K adjusts the rate at which the DECS-250N limits reactive power.
The loop gain (Kg) L adjusts the coarse loop-gain level of the PID algorithm for the reactive power limiter
function.
Voltage Matching
The integral gain (Ki) M adjusts the rate at which the DECS-250N matches the generator voltage to the bus
voltage.