Synchronous Machine Field Circuit
Synchronous machine field circuit per-unit interface with voltage input and current output
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Simscape / Electrical / Electromechanical / Synchronous
Description
The Synchronous Machine Field Circuit block applies specified voltage to, and measures current through, the field circuit of the synchronous machine that it is connected to.
The SI model converts the SI values that you enter in the dialog box to per-unit values for simulation. For information on the relationship between SI and per-unit machine parameters, see Per-Unit Conversion for Machine Parameters. For information on per-unit parameterization, see Per-Unit System of Units.
The block includes an electrical reference. The physical signal input Efd_pu defines the voltage and the physical signal output Ifd_pu provides the current, both in per-unit. The physical signal input Efd defines the voltage, in V, and the physical signal output Ifd provides the current, in A.
The per-unit bases are the nonreciprocal per-unit system, Efd and Ifd, rather than the reciprocal per-unit system, efd and ifd.
This figure shows the pu model of the Synchronous Machine Field Circuit block.
This figure shows the SI model of the Synchronous Machine Field Circuit block.
Ports
Input
Efd — Field voltage
physical
Physical input port associated with the field voltage.
Dependencies
This port is visible only when you set the PS input and
output unit parameter to
SI.
Efd_pu — Per unit field voltage
physical
Physical input port associated with the field voltage, in per-unit..
Dependencies
This port is visible only when you set the PS input and
output unit parameter to Per
unit.
Output
Ifd — Field current
physical
Physical input port associated with the field current.
Dependencies
This port is visible only when you set the PS input and
output unit parameter to
SI.
Ifd_pu — Per-unit field current
physical
Physical input port associated with the field current, in per-unit..
Dependencies
This port is visible only when you set the PS input and
output unit parameter to Per
unit.
Conserving
fd+ — Field winding positive terminal
electrical
Electrical conserving port associated with the field winding positive terminal.
fd- — Field winding negative terminal
electrical
Electrical conserving port associated with the field winding negative terminal.
Parameters
The additional parameters for this block are visibile only if you set the PS
input and output unit parameter to Per
unit.
Main
PS input and output unit — Unit-system configuration
SI (default) | Per unit
Unit-system configuration for the block.
Selecting:
SIexposes the SI ports.Per unitexposes the per-unit ports and parameters.
Rated apparent power — Rated apparent power
555e6
V*A (default)
Rated apparent power of the connected machine.
Rated electrical frequency — Nominal electrical frequency
60
Hz (default)
Nominal electrical frequency at which rated apparent power of the connected machine is quoted.
Specify field circuit input required to produce rated terminal voltage at no load by — Specify field circuit input required to produce rated terminal voltage
at no load by
Field circuit
current (default) | Field circuit voltage
Choose between Field circuit voltage and
Field circuit current.
Field circuit current — Field circuit current
1300
A (default)
This value is used to calculate the per-unit bases for the field circuit (nonreciprocal per-unit system).
Dependencies
This parameter is visible only when you set the Specify
field circuit input required to produce rated terminal voltage
at no load by parameter to Field circuit
current.
Field circuit voltage — Field circuit voltage
92.95
V (default)
This value is used to calculate the per-unit bases for the field circuit (nonreciprocal per-unit system).
Dependencies
This parameter is visible only when you set the Specify
field circuit input required to produce rated terminal voltage
at no load by parameter to Field circuit
voltage.
Machine Parameters
Specify parameterization by — Machine parameterization
Fundamental
Parameters (default) | Standard Parameters
Choose between Fundamental Parameters and
Standard Parameters.
Stator d-axis mutual inductance (unsaturated), Ladu — Stator d-axis mutual inductance (unsaturated)
1.66 (default)
Unsaturated stator d-axis mutual inductance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Fundamental Parameters.
Rotor field circuit resistance, Rfd — Rotor field circuit resistance
0.0006 (default)
Rotor field-circuit resistance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Fundamental Parameters.
Stator leakage reactance, Xl — Stator leakage reactance
0.15 (default)
Stator leakage reactance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters.
d-axis synchronous reactance, Xd — d-axis synchronous reactance
1.81 (default)
The d-axis synchronous reactance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters.
d-axis transient reactance, Xd' — d-axis transient reactance
0.3 (default)
The d-axis transient reactance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters.
d-axis subtransient reactance, Xd'' — d-axis subtransient reactance
0.23 (default)
d-axis subtransient reactance.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters.
Specify d-axis time constant — d-axis time constant specification
Open-circuit value (default) | Short-circuit value
Choose between Open-circuit value and
Short-circuit value.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters.
d-axis transient open-circuit, Td0' — d-axis transient open-circuit
8
s (default)
The d-axis transient open-circuit time constant.
This parameter is visible only when Specify d-axis transient
time constant is set to Open-circuit
value.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters and the
Specify d-axis transient time constant to
Open-circuit value.
d-axis transient short-circuit, Td' — d-axis transient short-circuit
1.3260
s (default)
The d-axis transient short-circuit time constant.
This parameter is visible only when Specify d-axis transient
time constant is set to Short-circuit
value.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters and the
Specify d-axis transient time constant to
Short-circuit value.
d-axis subtransient open-circuit, Td0'' — d-axis subtransient open-circuit
0.03 (default)
d-axis subtransient open-circuit.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters and the
Specify d-axis transient time constant to
Open-circuit value.
d-axis subtransient short-circuit, Td'' — d-axis subtransient short-circuit
0.0230 (default)
d-axis subtransient short-circuit.
Dependencies
This parameter is visible only when you set the Specify
parameterization by parameter to
Standard Parameters and the
Specify d-axis transient time constant to
Short-circuit value.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
See Also
Synchronous Machine Measurement | Synchronous Machine Model 1.0 | Synchronous Machine Model 2.1 | Synchronous Machine Round Rotor | Synchronous Machine Salient Pole