ExcIEEEAC2A

Class Description

IEEE 421.5-2005 type AC2A model. The model represents a high initial response field-controlled alternator-rectifier excitation system. The alternator main exciter is used with non-controlled rectifiers. The type AC2A model is similar to that of type AC1A except for the inclusion of exciter time constant compensation and exciter field current limiting elements.
Reference: IEEE 421.5-2005, 6.2.

Attributes

Name Type Description
ka PU Voltage regulator gain (KA) (> 0). Typical value = 400.
kb PU Second stage regulator gain (KB) (> 0). Typical value = 25.
kc PU Rectifier loading factor proportional to commutating reactance (KC) (>= 0). Typical value = 0,28.
kd PU Demagnetizing factor, a function of exciter alternator reactances (KD) (>= 0). Typical value = 0,35.
ke PU Exciter constant related to self-excited field (KE) (>= 0). Typical value = 1.
kf PU Excitation control system stabilizer gains (KF) (>= 0). Typical value = 0,03.
kh PU Exciter field current feedback gain (KH) (>= 0). Typical value = 1.
seve1 Float Exciter saturation function value at the corresponding exciter voltage, VE1, back of commutating reactance (SE[VE1]) (>= 0). Typical value = 0,037.
seve2 Float Exciter saturation function value at the corresponding exciter voltage, VE2, back of commutating reactance (SE[VE2]) (>= 0). Typical value = 0,012.
ta Seconds Voltage regulator time constant (TA) (> 0). Typical value = 0,02.
tb Seconds Voltage regulator time constant (TB) (>= 0). Typical value = 0.
tc Seconds Voltage regulator time constant (TC) (>= 0). Typical value = 0.
te Seconds Exciter time constant, integration rate associated with exciter control (TE) (> 0). Typical value = 0,6.
tf Seconds Excitation control system stabilizer time constant (TF) (> 0). Typical value = 1.
vamax PU Maximum voltage regulator output (VAMAX) (> 0). Typical value = 8.
vamin PU Minimum voltage regulator output (VAMIN) (< 0). Typical value = -8.
ve1 PU Exciter alternator output voltages back of commutating reactance at which saturation is defined (VE1) (> 0). Typical value = 4,4.
ve2 PU Exciter alternator output voltages back of commutating reactance at which saturation is defined (VE2) (> 0). Typical value = 3,3.
vfemax PU Exciter field current limit reference (VFEMAX) (> 0). Typical value = 4,4.
vrmax PU Maximum voltage regulator outputs (VRMAX) (> 0). Typical value = 105.
vrmin PU Minimum voltage regulator outputs (VRMIN) (< 0). Typical value = -95.

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