Over Excitation Limiters

 Name for Identification

Text

Optional text parameter for identification of the component.

 OEL Type?

Choice

Select None, OEL2C, OEL3C, OEL4C, or OEL5C as described in Over Excitation Limiter Transfer Functions.

 Summation or Takeover?

Choice

Select either Summation or Takeover mode. The available options for each mode are as follows:

• Summation: None, OEL2C, OEL3C, or OEL4C
• Takeover: None, OEL2C, or OEL5C
  

OEL Status: 0-Initialize;1-Release

INTEGER

Variable

A variable name can be used. This variable controls the status of the OEL component.

OEL Input

Choice

Select from None, Field Current (IF), Generator Field Voltage (EF), or Exciter Field Current (VFE), based on your requirement.

OEL Input Signal Scaling Factor [KSCALE]

REAL

Constant

Enter a value for the OEL input signal scaling factor [pu].

OEL Input Signal Filter Time Constant [TRoel]

REAL

Constant

Enter a value for the OEL input signal filter time constant [s].

OEL Reference for Inverse Time Calculations [ITFpu]

REAL

Constant

Enter a value for the OEL reference for inverse time calculations [pu].

OEL Actual Value Scaling Factor [Kact]

REAL

Constant

Enter a value for the OEL actual value scaling factor [pu].

 OEL Gain for Calculation of IERRinv2 [K2]

REAL

Constant

Enter a value for the OEL gain for calculation of IERRinv2 [pu].

OEL Exponent for Calculation of IERRinv2 [c2]

REAL

Constant

Enter a value for the OEL exponent for calculation of IERRinv2 [pu].

OEL Maximum Inverse Time Output [VINVmax]

REAL

 Constant

Enter a value for the OEL maximum inverse time output [pu].

OEL Minimum Inverse Time Output [VINVmin]

REAL

Constant

Enter a value for the OEL minimum inverse time output [pu].

OEL Fixed Delay Time Output [Fixedru]

REAL

Constant

Enter a value for the OEL fixed delay time output [pu].

OEL Fixed Cooling-down Time Output [Fixedrd]

REAL

Constant

Enter a value for the OEL fixed cooling-down time output [pu].

 OEL Gain for Calculation of IERRinv1 [K1]

REAL

Constant

Enter a value for the OEL gain for calculation of IERRinv1 [pu].

Ramp Rate Selector: Fixed or Function of Field Current Error? [SW1]

Choice

Select from Fixed or Function of Field Current Error.

OEL Exponent for Calculation of IERRinv1 [c1]

REAL

 Constant

Enter a value for the OEL exponent for calculation of IERRinv1 [pu].

OEL Timer Maximum Level [Tmax]

REAL

Constant

Enter a value for the OEL timer maximum level [pu].

OEL Timer Minimum Level [Tmin]

REAL

Constant

Enter a value for the OEL timer minimum level [pu].

OEL Timer Feedback Gain [KFB]

REAL

Constant

Enter a value for the OEL timer feedback gain [pu].

OEL Timer Reference [TFCL]

REAL

Constant

Enter a value for the OEL timer reference [pu].

OEL Ramp-down Rate [Krd]

REAL

Constant

Enter a value for the OEL ramp-down rate [pu].

OEL Ramp-up Rate [Kru]

REAL

Constant

Enter a value for the OEL ramp-up rate [pu].

OEL Thermal Reference Release Threshold [KZRU]

REAL

Constant

Enter a value for the OEL thermal reference release threshold [pu].

OEL Instantaneous Field Current Limit [Iinst]

REAL

Constant

Enter a value for the OEL instantaneous field current limit [pu].

OEL Thermal Field Current Limit [Ilim]

REAL

Constant

Enter a value for the OEL thermal field current limit [pu].

OEL Reference Filter Time Constant [TAoel]

REAL

Constant

Enter a value for the OEL reference filter time constant [s].

OEL Reset Reference, if OEL is inactive [Ireset]

REAL

Constant

Enter a value for the OEL reset reference [pu].

OEL Activation Delay Time [Ten]

REAL

Constant

Enter a value for the OEL activation delay time [s].

OEL Reset Delay Time [Toff]

REAL

Constant

Enter a value for the OEL reset delay time [s].

OEL Reset Delay Threshold [ITHoff]

REAL

Constant

Enter a value for the OEL reset delay threshold [pu].

OEL Output Compensation Type

Choice

Select from Gain, PID Controller, Two Lead/Lag Compensators or All.

OEL PID Regulator Proportional Gain [KPoel]

REAL

Constant

Enter a value for the OEL PID regulator proportional gain [pu].

This parameter should be set accordingly based on the compensation type.

OEL PID Regulator Integral Gain [KIoel]

REAL

 Constant

Enter a value for the OEL PID regulator integral gain [pu/s].

This parameter should be set accordingly based on the compensation type.

OEL PID Regulator Differential Gain [KDoel]

REAL

Constant

Enter a value for the OEL PID regulator differential gain [s].

This value is available when OEL Output Compensation Type | PID Controller or All is selected.

OEL PID Regulator Differential Time Constant [TDoel]

REAL

Constant

Enter a value for the OEL PID regulator differential time constant [s].

This value is available when OEL Output Compensation Type | PID Controller or All is selected.

Maximum OEL PID Output Limit [VOELmax3]

REAL

Constant

Enter a value for the maximum OEL PID output limit [pu].

This value is available when OEL Output Compensation Type | PID Controller or All is selected.

Minimum OEL PID Output Limit [VOELmin3]

REAL

Constant

Enter a value for the minimum OEL PID output limit [pu].

This value is available when OEL Output Compensation Type | PID Controller or All is selected.

OEL Regulator Numerator (Lead) Time Constant 2 [TC2oel]

REAL

Constant

Enter a value for the OEL regulator numerator (lead) time constant 2 [s].

This value is available when OEL Output Compensation Type | PID Controller or All is selected.

OEL Regulator Denominator (Lag) Time Constant 2 [TB2oel]

REAL

Constant

Enter a value for the OEL regulator denominator (lag) time constant 2 [s].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

Maximum OEL Lead-lag 1 Output Limit [VOELmax2]

REAL

Constant

Enter a value for the maximum OEL lead-lag 1 output limit [pu].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

Minimum OEL Lead-lag 1 Output Limit [VOELmin2]

REAL

Constant

Enter a value for the minimum OEL lead-lag 1 output limit [pu].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

OEL Regulator Numerator (Lead) Time Constant 1 [TC1oel]

REAL

Constant

Enter a value for the OEL regulator numerator (lead) time constant 1 [s].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

OEL Regulator Denominator (Lag) Time Constant 1 [TB1oel]

REAL

Constant

Enter a value for the OEL regulator denominator (lag) time constant 1 [s].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

Maximum OEL Output Limit [VOELmax1]

REAL

Constant

Enter a value for the maximum OEL output limit [pu].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

Minimum OEL Output Limit [VOELmin1]

REAL

Constant

Enter a value for the minimum OEL output limit [pu].

This value is available when OEL Output Compensation Type| Two Lead/Lag Compensators or All is selected.

OEL Input

Choice

Select from None, Field Current (IF), Generator Field Voltage (EF), or Exciter Field Current (VFE), based on your requirement.

 OEL Timed Field Current Limiter Pickup Level [ITFpu]

REAL

Constant

Enter a value for the OEL timed field current limiter pickup level [pu].

OEL Input Signal Scaling Factor [KSCALE]

REAL

Constant

Enter a value for the OEL input signal scaling factor [pu].

OEL Field Current Measurement Time Constant [TF]

REAL

Constant

Enter a value for the OEL field current measurement time constant [s].

Exponent for OEL Error Calculation [K1]

Choice

Select from Linear or Quadratic.

OEL Gain [KOEL]

REAL

Constant

Enter a value for the OEL gain [pu].

 OEL Proportional Gain [KPOEL]

REAL

Constant

Enter a value for the OEL proportional gain [pu].

OEL Integral Time Constant [TOEL]

REAL

 Constant

Enter a value for the OEL integral time constant [s].

OEL Integrator Maximum Output [VOELmax1]

REAL

Constant

Enter a value for the OEL integrator maximum output [pu].

OEL Integrator Minimum Output [VOELmin1]

REAL

Constant

Enter a value for the OEL integrator minimum output [pu].

OEL Maximum Output [VOELmax2]

REAL

Constant

Enter a value for the OEL maximum output [pu].

ROEL Minimum Output [VOELmin2]

REAL

Constant

Enter a value for the OEL minimum output [pu].

 OEL Timed Reactive Power Limiter Pickup Level [QREF]

REAL

Constant

Enter a value for the OEL timed reactive power limiter pickup level [pu].

OEL Fixed Time Delay [Tdelay]

REAL

Constant

Enter a value for the OEL fixed time delay [s].

OEL Proportional Gain [KP]

REAL

Constant

Enter a value for the OEL proportional gain [pu].

OEL Integral Gain [KI]

REAL

Constant

Enter a value for the OEL integral gain [pu/s].

OEL Minimum Output [Vmin]

REAL

Constant

Enter a value for the OEL minimum output [pu].

OEL Input

Choice

Select from None, Field Current (IF), Generator Field Voltage (EF), or Exciter Field Current (VFE), based on your requirement.

 OEL Reference 1 [IFDref1]

REAL

Constant

Enter a value for the OEL reference 1 [pu].

OEL Reference 2 [IFDref2]

REAL

Constant

Enter a value for the OEL reference 2 [pu].

Scale Factor for OEL Input [KSCALE1]

REAL

Constant

Enter a value for the scale factor for OEL input [pu].

OEL Input Transducer Time Constant [TF1]

REAL

Constant

Enter a value for the OEL input transducer time constant [s].

OEL Lead-Lag Gain [K]

REAL

Constant

Enter a value for the OEL lead-lag gain [pu].

OEL Lead Time Constant [TCoel]

REAL

Constant

Enter a value for the OEL lead time constant [s].

OEL Lag Time Constant [TBoel]

REAL

Constant

Enter a value for the OEL lag time constant [s].

OEL Proportional Gain [KPoel]

REAL

Constant

Enter a value for the OEL proportional gain [pu].

OEL Integral Gain [KIoel]

REAL

Constant

Enter a value for the OEL integral gain [pu/s].

OEL PI Controller Upper Limit [VOELmax]

REAL

Constant

Enter a value for the OEL PI controller upper limit [pu].

OEL PI Controller Lower Limit [VOELmin]

REAL

Constant

Enter a value for the OEL PI controller lower limit [pu].

 OEL Reference Logic Switch [SW1]

Choice

Select from Pos. A (Ibias) or Pos. B (VFE).

OEL Reference Bias [Ibias]

REAL

Constant

Enter a value for the OEL reference bias [pu].

Exciter Field Current Reference Setpoint [VFEref]

REAL

Constant

Enter a value for the exciter field current reference setpoint [pu].

This value is available when OEL Reference Logic Switch | Pos. A (Ibias) is selected.

Scale Factor (IFEbase/IFErated) [KSCALE2]

REAL

Constant

Enter a value for the scale factor (IFEbase/IFErated) [pu].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

Exciter Field Current Transducer Time Constant [TF2]

REAL

Constant

Enter a value for the exciter field current transducer time constant [s].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

Exciter Field Current Regulator Proportional Gain [KPVfe]

REAL

Constant

Enter a value for the exciter field current regulator proportional gain [pu].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

Exciter Field Current Regulator Integral Gain [KIVfe]

REAL

Constant

Enter a value for the exciter field current regulator integral gain [pu/s].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

Exciter Field Current Regulator Upper Limit [VVFEmax]

REAL

Constant

Enter a value for the exciter field current regulator upper limit [pu].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

Exciter Field Current Regulator Lower Limit [VVFEmin]

REAL

Constant

Enter a value for the exciter field current regulator lower limit [pu].

This value is available when OEL Reference Logic Switch | Pos. B (VFE) is selected.

OEL Activation Logic Pickup Level [IFDpulev]

REAL

Constant

Enter a value for the OEL activation logic pickup level [pu].

OEL Activation Logic Timer Setpoint [TIFDlev]

REAL

Constant

Enter a value for the OEL activation logic timer setpoint [s].

Exponent for Inverse Time Function [K1]

Choice

Select from Linear or Quadratic.

OEL Inverse Time Integrator Pickup Level [IFDpu]

REAL

Constant

Enter a value for the OEL inverse time integrator pickup level [pu].

OEL Inverse Time Limit Active Level [IFDlim]

REAL

Constant

Enter a value for the OEL inverse time limit active level [pu.s].

OEL Inverse Time Upper Limit [VOELmax1]

REAL

Constant

Enter a value for the OEL inverse time upper limit [pu.s].

OEL Inverse Time Integrator Time Constant [TOEL]

REAL

Constant

Enter a value for the OEL inverse time integrator time constant [s].

OEL Inverse Time Leak Gain [KIFDT]

REAL

Constant

Enter a value for the OEL inverse time leak gain [pu].