ExcIEEEAC7B

Class Description

IEEE 421.5-2005 type AC7B model. The model represents excitation systems which consist of an AC alternator with either stationary or rotating rectifiers to produce the DC field requirements. It is an upgrade to earlier AC excitation systems, which replace only the controls but retain the AC alternator and diode rectifier bridge.
Reference: IEEE 421.5-2005, 6.7. Note, however, that in IEEE 421.5-2005, the [1 / sTE] block is shown as [1 / (1 + sTE)], which is incorrect.

Attributes

Name Type Description
kc PU Rectifier loading factor proportional to commutating reactance (KC) (>= 0). Typical value = 0,18.
kd PU Demagnetizing factor, a function of exciter alternator reactances (KD) (>= 0). Typical value = 0,02.
kdr PU Voltage regulator derivative gain (KDR) (>= 0). Typical value = 0.
ke PU Exciter constant related to self-excited field (KE). Typical value = 1.
kf1 PU Excitation control system stabilizer gain (KF1) (>= 0). Typical value = 0,212.
kf2 PU Excitation control system stabilizer gain (KF2) (>= 0). Typical value = 0.
kf3 PU Excitation control system stabilizer gain (KF3) (>= 0). Typical value = 0.
kia PU Voltage regulator integral gain (KIA) (>= 0). Typical value = 59,69.
kir PU Voltage regulator integral gain (KIR) (>= 0). Typical value = 4,24.
kl PU Exciter field voltage lower limit parameter (KL). Typical value = 10.
kp PU Potential circuit gain coefficient (KP) (> 0). Typical value = 4,96.
kpa PU Voltage regulator proportional gain (KPA) (> 0 if ExcIEEEAC7B.kia = 0). Typical value = 65,36.
kpr PU Voltage regulator proportional gain (KPR) (> 0 if ExcIEEEAC7B.kir = 0). Typical value = 4,24.
seve1 Float Exciter saturation function value at the corresponding exciter voltage, VE1, back of commutating reactance (SE[VE1]) (>= 0). Typical value = 0,44.
seve2 Float Exciter saturation function value at the corresponding exciter voltage, VE2, back of commutating reactance (SE[VE2]) (>= 0). Typical value = 0,075.
tdr Seconds Lag time constant (TDR) (>= 0). Typical value = 0.
te Seconds Exciter time constant, integration rate associated with exciter control (TE) (> 0). Typical value = 1,1.
tf Seconds Excitation control system stabilizer time constant (TF) (> 0). Typical value = 1.
vamax PU Maximum voltage regulator output (VAMAX) (> 0). Typical value = 1.
vamin PU Minimum voltage regulator output (VAMIN) (< 0). Typical value = -0,95.
ve1 PU Exciter alternator output voltages back of commutating reactance at which saturation is defined (VE1) (> 0). Typical value = 6,3.
ve2 PU Exciter alternator output voltages back of commutating reactance at which saturation is defined (VE2) (> 0). Typical value = 3,02.
vemin PU Minimum exciter voltage output (VEMIN) (<= 0). Typical value = 0.
vfemax PU Exciter field current limit reference (VFEMAX). Typical value = 6,9.
vrmax PU Maximum voltage regulator output (VRMAX) (> 0). Typical value = 5,79.
vrmin PU Minimum voltage regulator output (VRMIN) (< 0). Typical value = -5,79.

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