Brushless Exciter
Excitation system without compounding.
Description
The Brushless Exciter unit is an electro-machine brushless and high frequency modernised exciter. The modernisation of the high frequency exciter consists in the elimination of the sub exciter and the elimination of the series exciter excitation winding from the excitation system [1]. The excitation current feedback is also taken into account.
The Brushless Exciter unit can be used as an exciter in a synchronous generator model with a control system, which is shown in the schematic.
The Brushless Exciter mathematical model is shown in the diagram.
In this diagram
-
- is the equivalent lag time constant of the exciter;
-
- equivalent exciter advance time constant;
-
- design parameter;
-
- output voltage of the automatic excitation regulator;
-
- excitation voltage;
-
- rotor excitation current;
-
- rotor speed of the generator rotor in relative units.
Ports
Input
#
Vr
—
input voltage value from the excitation regulator
scalar
Details
Input voltage value from the excitation regulator in relative units.
| Data types |
|
| Complex numbers support |
No |
#
ω
—
input value of generator rotor speed
scalar
Details
The input value of the generator rotor speed in relative units.
| Data types |
|
| Complex numbers support |
No |
#
Ifd
—
generator excitation current input value
scalar
Details
Input value of the generator excitation current.
| Data types |
|
| Complex numbers support |
No |
Output
#
Efd
—
excitation voltage output
scalar
Details
The output value of the excitation voltage applied to the excitation circuit of a synchronous machine in relative units.
| Data types |
|
| Complex numbers support |
No |
Parameters
Main
# Field current coefficient K — design excitation current factor
Details
Calculated field current coefficient.
Calculation methodology is presented in [1] p.107.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
# Transient gain reduction lead and lag time constants [T1 T2], s — calculated equivalent exciter time constants
Details
Calculated equivalent exciter time constants, in seconds.
Calculation methodology is presented in [1] p.107.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
# Maximum exciter voltage output Efdmax, pu — maximum output value of the excitation voltage
Details
The maximum output value of the excitation voltage applied to the excitation circuit of a synchronous machine, in relative units.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Initial Values
# Initial condition of field voltage Efd0, pu — initial value of excitation voltage
Details
Initial value of the excitation voltage in relative units.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Limits regulator
# Voltage regulator input limits [VRmax VRmin], pu — regulator voltage input value limits
Details
The maximum and minimum input voltage value of the regulator.
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |