DC Exciter Transfer Functions (2016)

As indicated previously, each of the exciter models have a unique transfer function. The schematic diagram of each is given below.

For more details, see IEEE Standard 421.5-2016.

IEEE DC Exciter Type DC1C

DC1C is an extended version of DC1A, to include appropriate connections for summation point, over- and under-excitation limiters, and lower limit EFDmin.

Where,

IEEE DC Exciter Type DC2C

DC2C is an extended version of DC2A, to include appropriate connections for summation point, over- and under-excitation limiters, and lower limit EFDmin. It also differs from DC2A in the voltage regulator output limits, as it incorporates terminal voltage magnitude VT.

Where,

IEEE DC Exciter Type DC3A

Where,

	Exciter voltage for SE1 [pu]
	Exciter voltage for SE2 [pu]
	Exciter constant related to self-excited field [pu]
	Fast raise/lower setting [pu]
	Saturation at EFD1 [pu]
	Saturation at EFD2 [pu]
	Exciter time constant [s]
	Rheostat travel time [s]
	Output of terminal voltage transducer and load compensation elements [pu]
	Voltage error signal [pu]
	Signal proportional to exciter field current [pu]
	Voltage regulator output [pu]
	Voltage regulator reference (determined to satisfy initial conditions) [pu]
	Maximum and minimum regulator outputs [pu]
	Signal proportional to exciter saturation [pu]

IEEE DC Exciter Type DC4C

DC4C is an extended version of DC4B, to include appropriate connections for summation point, over- and under-excitation limiters, and lower limit EFDmin.

Where,