Synchronous Machine Field Circuit
Excitation circuit of synchronous machine with voltage input and current output.
Description
Unit Synchronous Machine Field Circuit supplies the specified voltage and measures the current through the field circuit of the synchronous machine to which it is connected. The unit converts the values in SI units that you enter in the dialogue box into values for simulation in relative units (o.u.).
The block includes an electrical ground. The physical signal input Efd_si defines voltage and the physical signal output Ifd_pu defines current, both in r.u. The physical signal input Efd defines voltage, in V, and the physical signal output Ifd provides current, in A. The physical signal input Efd defines voltage, in V, and the physical signal output Ifd provides current, in A.
The o.e. bases are a nonreciprocal system, Efd and Ifd, not a reciprocal system, efd and ifd.
The figure below shows the block model Synchronous Machine Field Circuit in the o.e.:
The following figure shows the block model Synchronous Machine Field Circuit in SI:
Ports
Conserving
#
fd+
—
positive terminal of field winding
electricity
Details
An electrical port connected to the positive terminal of the field winding.
| Program usage name |
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#
fd-
—
negative terminal of field winding
electricity
Details
An electrical port connected to the negative terminal of the field winding.
| Program usage name |
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Input
#
Efd_si
—
excitation voltage
scalar
Details
The physical input port associated with the field voltage.
Dependencies
This port is used when the parameters are set to Input and output unit is set to SI.
| Data types |
|
| Complex numbers support |
No |
#
Efd_pu
—
excitation voltage in o.u.
scalar
Details
The physical input port associated with the field voltage, in o.u.
Dependencies
This port is used when the parameters are set to Input and output unit is set to Per unit.
| Data types |
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| Complex numbers support |
No |
Output
#
Ifd_si
—
excitation current
scalar
Details
The physical input port associated with the field current.
Dependencies
This port is used when the parameters are set to Input and output unit is set to SI.
| Data types |
|
| Complex numbers support |
No |
#
Ifd_pu
—
excitation current in o.u.
`scalar
Details
Physical input port associated with the field current, in o.u.
Dependencies
This port is used if the parameter Input and output unit is set to Per unit.
| Data types |
|
| Complex numbers support |
No |
Parameters
Main
#
Input and output unit —
system of units for measuring physical signals
Per unit | SI
Details
A system of units for measuring physical signals. Choose one of the options:
-
SI- international system of units (SI). -
Per unit- system of relative units (R.U.).
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
No |
#
Rated apparent power —
rated full power
W | GW | MW | kW | mW | uW | HP_DIN | A*V
Details
Rated power.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Rated electrical frequency —
rated electrical frequency
Hz | GHz | MHz | kHz
Details
The rated electrical frequency at which the rated total power is indicated.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Specify field circuit input required to produce rated terminal voltage at no load by —
Specify the excitation circuit required to obtain the rated voltage when no load is applied
Field circuit voltage | Field circuit current
Details
Method of parameterization of the field circuit. The following options are possible:
-
Field circuit voltage- the excitation circuit voltage is used. -
Field circuit current- field circuit current is used. This method is the By default method.
This parameter affects the visibility of the parameters Field circuit voltage и Field circuit current.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
No |
#
Field circuit voltage —
field circuit voltage
V | MV | kV | mV
Details
The field circuit voltage that produces the rated voltage at the machine outputs.
Dependencies
This parameter is used when the parameters are set to Specify field circuit input required to produce rated terminal voltage at no load by is set to Field circuit voltage.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Field circuit current —
field current
A | MA | kA | mA | nA | pA | uA
Details
The field circuit current that produces the rated voltage at the machine outputs.
Dependencies
This parameter is used if the parameters are set to Specify field circuit input required to produce rated terminal voltage at no load by is set to Field circuit current.
| Values |
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| Default value |
|
| Program usage name |
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| Evaluatable |
Yes |
Machine Parameters
#
Specify parameterization by —
block parameterization method
Fundamental parameters | Standard parameters
Details
Block parameterization method. The following options are possible:
-
Fundamental parameters- adjust the impedance by usage of fundamental parameters. -
Standard parameters- set the impedance using the fundamental parameters and specify the time constants on the and axes.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
No |
# Stator d-axis mutual inductance (unsaturated) Ladu — mutual inductance of the stator d axis (unsaturated)
Details
Unsaturated mutual inductance in the d axis of the stator. This parameter must be greater than 0.
Dependencies
This parameter is used if the parameter is Specify parameterization by is set to Fundamental parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Rotor field circuit resistance Rfd — rotor excitation resistance
Details
The resistance of the rotor excitation circuit. This parameter must be greater than 0.
Dependencies
This parameter is used if the parameters are set to Specify parameterization by is set to Fundamental parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# Stator leakage reactance Xl — stator dissipation reactance
Details
Stator Reactive Dissipation. This parameter must be greater than 0.
Dependencies
This parameter is used when the parameters are set to Specify parameterization by is set to Standard parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# d-axis synchronous reactance Xd — synchronous inductive resistance in the d axis
Details
Synchronous inductive resistance along the d axis. This parameter must be greater than 0.
Dependencies
This parameter is used when the parameters are set to Specify parameterization by is set to Standard parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# d-axis transient reactance Xd' — transient reactance in the d axis
Details
Transient reactance on the d axis. This parameter must be greater than 0.
Dependencies
This parameter is used if the parameters are set to Specify parameterization by is set to Standard parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
# d-axis subtransient reactance Xd" — super transient reactance along the d axis
Details
Super transient reactance along the d axis. This parameter must be greater than 0.
Dependencies
This parameter is used if the parameters are set to Specify parameterization by is set to Standard parameters.
| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
Specify d-axis time constant —
setting the time constant for the d axis
Open circuit | Short circuit
Details
Select between Open circuit и Short circuit.
Dependencies
This parameter is used if the parameters are Specify parameterization by is set to Standard parameters.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
No |
#
d-axis transient open-circuit Td0' —
transient time constant of the open-circuit excitation circuit in the d axis
d | s | hr | ms | ns | us | min
Details
Transient time constant of the open field circuit. This parameters must be:
-
Greater than
0. -
Greater than d-axis transient open-circuit Td0".
Dependencies
This parameter is used if the parameters are Specify parameterization by is set to Standard parameters and the parameters Specify d-axis time constant is set to Open circuit.
| Values |
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| Default value |
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| Program usage name |
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| Evaluatable |
Yes |
#
d-axis transient open-circuit Td0" —
over-transient time constant of the open-circuit excitation circuit along the d axis
d | s | hr | ms | ns | us | min
Details
Super transient time constant of the open-circuit excitation circuit in the d axis. This parameter must be greater than 0.
Dependencies
This parameter is used when the parameters are set to Specify parameterization by is set to Standard parameters and the parameters Specify d-axis time constant is set to Open circuit.
| Values |
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| Default value |
|
| Program usage name |
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| Evaluatable |
Yes |
#
d-axis transient short-circuit Td' —
transient time constant of the closed excitation circuit in the d axis
d | s | hr | ms | ns | us | min
Details
Transient time constant of the closed field circuit in the d axis. This parameters must be:
-
Greater than
0. -
Greater than the value of the parameters d-axis transient short-circuit Td".
Dependencies
This parameter is used when the parameters are set to Specify parameterization by is set to Standard parameters and the parameters Specify d-axis time constant is set to Short circuit.
| Values |
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| Default value |
|
| Program usage name |
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| Evaluatable |
Yes |
#
d-axis transient short-circuit Td" —
super transient time constant of the closed excitation circuit along the d axis
d | s | hr | ms | ns | us | min
Details
Super transient time constant of the closed field circuit in the d axis. This parameter must be greater than 0.
Dependencies
This parameter is used when the parameters are set to Specify parameterization by is set to Standard parameters and the parameters Specify d-axis time constant is set to Short circuit.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |