VariableImpedance

Multiphase variable impedance

VariableImpedance

Library

Modelica/Electrical/QuasiStationary/MultiPhase/Basic

Description

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

The linear impedance connects the complex voltage v with the complex current i by i*Z = v in each phase, using m variable singlephase impedances. The impedances Z_ref = R_ref + j*X_ref are given as complex input signals, representing the resistive and reactive components of the input impedances. The resistive components are modeled temperature dependent, so the real part R_actual = real(Z) are determined from the actual operating temperatures and the reference input resistances real(Z_ref). Conditional heat ports are considered. The reactive components X_actual = imag(Z) are 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 reactances X_actual are proportional to f/f_ref
(b) imag(Z_ref) < 0: capacitive case: The actual reactances X_actual are proportional to f_ref/f

Note

Zero crossings of the real or imaginary parts of the impedance signals Z_ref could cause singularities due to the actual structure of the connected network.

Parameters

VariableImpedance_0

Name	Label	Description	Data Type	Valid Values
mo_m	m	Number of phases	Scalar
mo_T_ref	T_ref	Reference temperatures	Vector
mo_alpha_ref	alpha_ref	Temperature coefficient of resistance (R_actual = R_ref(1 + alpha_ref(heatPort.T - T_ref))	Vector
mo_mh	mh	Number of heatPorts=number of phases	Scalar
mo_useHeatPort	useHeatPort	=true, if all heat ports are enabled	Number	0 1
mo_T	T	Fixed device temperatures if useHeatPort = false	Vector
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

Name	Label	Description	Data Type	Valid Values
mo_abs_v	abs_v	abs_v	Structure
mo_abs_v/fixed	fixed		Cell of vectors	true false
mo_abs_v/start	start		Cell of vectors
mo_arg_v	arg_v	arg_v	Structure
mo_arg_v/fixed	fixed		Cell of vectors	true false
mo_arg_v/start	start		Cell of vectors
mo_abs_i	abs_i	abs_i	Structure
mo_abs_i/fixed	fixed		Cell of vectors	true false
mo_abs_i/start	start		Cell of vectors
mo_arg_i	arg_i	arg_i	Structure
mo_arg_i/fixed	fixed		Cell of vectors	true false
mo_arg_i/start	start		Cell of vectors
mo_P	P	P	Structure
mo_P/fixed	fixed		Cell of vectors	true false
mo_P/start	start		Cell of vectors
mo_P_total	P_total	P_total	Structure
mo_P_total/fixed	fixed		Cell of scalars	true false
mo_P_total/start	start		Cell of scalars
mo_Q	Q	Q	Structure
mo_Q/fixed	fixed		Cell of vectors	true false
mo_Q/start	start		Cell of vectors
mo_Q_total	Q_total	Q_total	Structure
mo_Q_total/fixed	fixed		Cell of scalars	true false
mo_Q_total/start	start		Cell of scalars
mo_S	S	S	Structure
mo_S/fixed	fixed		Cell of vectors	true false
mo_S/start	start		Cell of vectors
mo_S_total	S_total	S_total	Structure
mo_S_total/fixed	fixed		Cell of scalars	true false
mo_S_total/start	start		Cell of scalars
mo_pf	pf	pf	Structure
mo_pf/fixed	fixed		Cell of vectors	true false
mo_pf/start	start		Cell of vectors
mo_omega	omega	omega	Structure
mo_omega/fixed	fixed		Cell of scalars	true false
mo_omega/start	start		Cell of scalars

Ports

Name	Type	Description	IO Type	Number
plug_p	implicit	Positive quasi-static polyphase plug	input	1
plug_n	implicit	Negative quasi-static polyphase plug	output	1
Z_ref	implicit	Variable complex impedances	input	2
Port 4	implicit	Conditional heat ports	input	mo_useHeatPort

VariableImpedance

Library

Description

Note

See also

Parameters

Ports

See Also