VariableImpedance

Single phase variable impedance

    VariableImpedance

Library

Modelica/Electrical/QuasiStationary/SinglePhase/Basic

Description

The impedance model represents a series connection of a resistor and either an inductor or capacitor.

The linear impedance connects the complex voltage v with the complex current i by i*Z = v. The impedance Z_ref = R_ref + j*X_ref is given as complex input signal, representing the resistive and reactive component of the input impedance. The resistive component is modeled temperature dependent, so the real part R_actual = real(Z) is determined from the actual operating temperature and the reference input resistance real(Z_ref). The reactive component X_actual = imag(Z) is equal to imag(Z_ref) if frequencyDependent = false. Frequency dependency is considered by frequencyDependent = true, distinguishing two cases:

(a) imag(Z_ref) > 0: inductive case
The actual reactance X_actual is proportional to f/f_ref
(b) imag(Z_ref) < 0: capacitive case
The actual reactance X_actual is proportional to f_ref/f

Note

A zero crossing of the real or imaginary part of the impedance signal Z_ref could cause singularities due to the actual structure of the connected network.

See also

Resistor, Conductor, Capacitor, Inductor, Impedance, Admittance, Variable resistor, Variable conductor, Variable capacitor, Variable inductor, Variable admittance

Parameters

VariableImpedance_0

NameLabelDescriptionData TypeValid Values

mo_T_ref

T_ref

Reference temperature

Scalar

mo_alpha_ref

alpha_ref

Temperature coefficient of resistance (R_actual = R_ref*(1 + alpha_ref*(heatPort.T - T_ref))

Scalar

mo_useHeatPort

useHeatPort

=true, if heatPort is enabled

Number

0
1

mo_T

T

Fixed device temperature if useHeatPort = false

Scalar

mo_frequencyDependent

frequencyDependent

Consider frequency dependency, if true

Scalar

true
false

mo_f_ref

f_ref

Reference frequency, if frequency dependency is considered

Scalar

VariableImpedance_1

NameLabelDescriptionData TypeValid Values

mo_abs_v

abs_v

abs_v

Structure

mo_abs_v/fixed

fixed

Cell of scalars

true
false

mo_abs_v/start

start

Cell of scalars

mo_arg_v

arg_v

arg_v

Structure

mo_arg_v/fixed

fixed

Cell of scalars

true
false

mo_arg_v/start

start

Cell of scalars

mo_abs_i

abs_i

abs_i

Structure

mo_abs_i/fixed

fixed

Cell of scalars

true
false

mo_abs_i/start

start

Cell of scalars

mo_arg_i

arg_i

arg_i

Structure

mo_arg_i/fixed

fixed

Cell of scalars

true
false

mo_arg_i/start

start

Cell of scalars

mo_P

P

P

Structure

mo_P/fixed

fixed

Cell of scalars

true
false

mo_P/start

start

Cell of scalars

mo_Q

Q

Q

Structure

mo_Q/fixed

fixed

Cell of scalars

true
false

mo_Q/start

start

Cell of scalars

mo_S

S

S

Structure

mo_S/fixed

fixed

Cell of scalars

true
false

mo_S/start

start

Cell of scalars

mo_pf

pf

pf

Structure

mo_pf/fixed

fixed

Cell of scalars

true
false

mo_pf/start

start

Cell of scalars

mo_omega

omega

omega

Structure

mo_omega/fixed

fixed

Cell of scalars

true
false

mo_omega/start

start

Cell of scalars

mo_LossPower

LossPower

LossPower

Structure

mo_LossPower/fixed

fixed

Cell of scalars

true
false

mo_LossPower/start

start

Cell of scalars

mo_T_heatPort

T_heatPort

T_heatPort

Structure

mo_T_heatPort/fixed

fixed

Cell of scalars

true
false

mo_T_heatPort/start

start

Cell of scalars

mo_R_actual

R_actual

R_actual

Structure

mo_R_actual/fixed

fixed

Cell of scalars

true
false

mo_R_actual/start

start

Cell of scalars

mo_X_actual

X_actual

X_actual

Structure

mo_X_actual/fixed

fixed

Cell of scalars

true
false

mo_X_actual/start

start

Cell of scalars

mo_R_ref

R_ref

R_ref

Structure

mo_R_ref/fixed

fixed

Cell of scalars

true
false

mo_R_ref/start

start

Cell of scalars

mo_X_ref

X_ref

X_ref

Structure

mo_X_ref/fixed

fixed

Cell of scalars

true
false

mo_X_ref/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

pin_p

implicit

Positive quasi-static single-phase pin

input

1

pin_n

implicit

Negative quasi-static single-phase pin

output

1

Z_ref

implicit

Variable complex impedance

input

2

Port 4

implicit

Conditional heat port

input

mo_useHeatPort