Engee documentation

Synchronous Machine Field Circuit

The excitation circuit of a synchronous machine with voltage Input and current output.

blockType: AcausalElectricPowerSystems.Electromechanical.Synchronous.FieldCircuit

synchronous machine field circuit

Path in the library:

/Physical Modeling/Electrical/Electromechanical/Synchronous/Synchronous Machine Field Circuit

Description

Block Synchronous Machine Field Circuit supplies the set voltage and measures the current through the excitation circuit of the synchronous machine to which it is connected. The block converts the values in SI units that you enter in the dialog box into values for modeling in relative units (OE).

The unit includes electrical grounding. The Input of the physical signal Efd_si determines the voltage, and the output of the physical signal Ifd_pu determines the current, both in O.E. The Input of the physical signal Efd determines the voltage in V, and the output of the physical signal Ifd provides the current in A.

The O.E. bases are a non-reciprocal system, Efd and Ifd, and not a reciprocal system, efd and ifd.

The figure below shows the block model Synchronous Machine Field Circuit in O.E.:

synchronous machine field circuit i 1

The following figure shows the block model Synchronous Machine Field Circuit in C:

synchronous machine field circuit i 2

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

fd_p

# fd- — negative terminal of field winding
electricity

Details

An electrical port connected to the negative terminal of the field winding.

Program usage name

fd_n

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

Float64.
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

Float64.
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

Float64.
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

Float64.
Complex numbers support

No

Parameters

Main

# Input and output unit — a system of units for measuring physical signals
Per unit | SI

Details

A system of units of measurement for physical signals. Choose one of the options:

  • SI — The International System of Units (SI).

  • Per unit — the system of relative units (OE).

Values

Per unit | SI
Default value

SI
Program usage name

parameter_units
Evaluatable

No

# Rated apparent power — Rated full power
W | uW | mW | kW | MW | GW | V*A | HP_DIN

Details

Rated power.

Units

W | uW | mW | kW | MW | GW | V*A | HP_DIN
Default value

555e6 V*A
Program usage name

S_rated
Evaluatable

Yes

# Rated electrical frequency — Rated electrical frequency
Hz | kHz | MHz | GHz

Details

The rated electrical frequency at which the rated total power is indicated.

Units

Hz | kHz | MHz | GHz
Default value

50 Hz
Program usage name

f_rated
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 in the absence of a load.
Field circuit voltage | Field circuit current

Details

Method of parameterization of the excitation circuit. The following options are possible:

  • Field circuit voltage — the voltage of the excitation circuit is used.

  • Field circuit current — the current of the excitation circuit is used. This method is the default method.

This parameter affects the visibility of the parameters Field circuit voltage and Field circuit current.

Values

Field circuit voltage | Field circuit current
Default value

Field circuit current
Program usage name

field_circuit_parameterization
Evaluatable

No

# Field circuit voltage — voltage of the excitation circuit
V | uV | mV | kV | MV

Details

The voltage of the excitation circuit that creates the rated voltage at the outputs of the machine.

Dependencies

This parameter is used if for the parameter Specify field circuit input required to produce rated terminal voltage at no load by the value is set Field circuit voltage.

Units

V | uV | mV | kV | MV
Default value

92.95 V
Program usage name

E_fd_base
Evaluatable

Yes

# Field circuit current — excitation circuit current
A | pA | nA | uA | mA | kA | MA

Details

The current of the excitation circuit, which creates the rated voltage at the outputs of the machine.

Dependencies

This parameter is used if for the parameter Specify field circuit input required to produce rated terminal voltage at no load by the value is set Field circuit current.

Units

A | pA | nA | uA | mA | kA | MA
Default value

1300.0 A
Program usage name

I_fd_base
Evaluatable

Yes

Machine Parameters

# Specify parameterization by — block parameterization method
Fundamental parameters | Standard parameters

Details

The block parameterization method. The following options are possible:

  • Fundamental parameters — Adjust the impedance using the fundamental parameters.

  • Standard parameters — adjust the impedance using fundamental parameters and specify time constants along the axes and .

Values

Fundamental parameters | Standard parameters
Default value

Fundamental parameters
Program usage name

parameterization_option
Evaluatable

No

# Stator d-axis mutual inductance (unsaturated) Ladu — mutual axis inductance stator (unsaturated)

Details

Unsaturated mutual inductance along the axis the stator. This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Fundamental parameters.

Default value

1.66
Program usage name

L_adu
Evaluatable

Yes

# Rotor field circuit resistance Rfd — resistance of the rotor excitation circuit

Details

Resistance of the rotor excitation circuit. This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Fundamental parameters.

Default value

0.0006
Program usage name

R_fd
Evaluatable

Yes

# Stator leakage reactance Xl — stator scattering reactance

Details

Reactive scattering of the stator. This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters.

Default value

0.15
Program usage name

X_l
Evaluatable

Yes

# d-axis synchronous reactance Xd — synchronous inductive resistance along the axis

Details

Synchronous inductive resistance along the axis . This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters.

Default value

1.81
Program usage name

X_d
Evaluatable

Yes

# d-axis transient reactance Xd' — transient reactance along the axis

Details

Transient reactance along the axis . This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters.

Default value

0.3
Program usage name

X_p_d
Evaluatable

Yes

# d-axis subtransient reactance Xd" — superconductive reactance along the axis

Details

Superconductive reactance along the axis . This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters.

Default value

0.23
Program usage name

X_pp_d
Evaluatable

Yes

# Specify d-axis time constant — setting the time constant for the axis
Open circuit | Short circuit

Details

Choose between Open circuit and Short circuit.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters.

Values

Open circuit | Short circuit
Default value

Open circuit
Program usage name

option_d
Evaluatable

No

# d-axis transient open-circuit Td0' — transient time constant of an open excitation circuit along the axis
s | ns | us | ms | min | hr | d

Details

The transient time constant of an open excitation circuit. This parameter should be:

  • More 0.

  • More than d-axis transient open-circuit Td0".

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters and for the parameter Specify d-axis time constant the value is set Open circuit.

Units

s | ns | us | ms | min | hr | d
Default value

8.0 s
Program usage name

T_p_d0
Evaluatable

Yes

# d-axis transient open-circuit Td0" — the hyper-transient time constant of an open-circuit excitation along the axis
s | ns | us | ms | min | hr | d

Details

The hyper-transient time constant of an open-circuit excitation along the axis . This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters and for the parameter Specify d-axis time constant the value is set Open circuit.

Units

s | ns | us | ms | min | hr | d
Default value

0.03 s
Program usage name

T_pp_d0
Evaluatable

Yes

# d-axis transient short-circuit Td' — transient time constant of a closed excitation circuit along the axis
s | ns | us | ms | min | hr | d

Details

Transient time constant of a closed excitation circuit along the axis . This parameter should be:

  • More 0.

  • More than the parameter value d-axis transient short-circuit Td".

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters and for the parameter Specify d-axis time constant the value is set Short circuit.

Units

s | ns | us | ms | min | hr | d
Default value

1.326 s
Program usage name

T_p_d
Evaluatable

Yes

# d-axis transient short-circuit Td" — the super-transient time constant of a closed excitation circuit along the axis
s | ns | us | ms | min | hr | d

Details

The super-transient time constant of a closed excitation circuit along the axis . This parameter should be higher. 0.

Dependencies

This parameter is used if for the parameter Specify parameterization by the value is set Standard parameters and for the parameter Specify d-axis time constant the value is set Short circuit.

Units

s | ns | us | ms | min | hr | d
Default value

0.023 s
Program usage name

T_pp_d
Evaluatable

Yes

Examples