modelForcedCommSwitch

Forced commuting switch, 3-phase dq0

Extends from Ports.PortBase (base model adapting Spot to PowerSystems), PowerSystems.Common.Nominal.NominalVI (Nominal values).

Information

Switching by forced change of current-voltage ratio.

Does not allow single-phase switching. This model acts directly on the current vector in the chosen reference frame and avoids any transformation of variables. To be used, if details of the switching process are not of interest.

'closed' and 'open' determine the mechanical switch-position.
Electrically the switch is on, if it is 'closed', whereas the currents start decreasing exponentially, when it is opened.

A single scalar control-input is sufficient.

The transition between the 'off' conductivity (epsG) and the 'on' resistivity (epsR) is continuous with an exponential relaxation function

  f = (exp(-dt^p/2) - exp(-1/2))/(1 - exp(-1/2))

with

  dt          relative time measured from switching instant
  t_relax     relaxation time
  p           power of exponent

Parameters

Type	Name	Default	Description
Real	eps	{1e-4, 1e-4}	{resistance 'closed', conductance 'open'}
SI.Time	t_relax	10e-3	switch relaxation time
Integer	p_relax	4	power of relaxation exponent
Nominal
SI.Voltage	V_nom (from NominalVI)	1	nom Voltage
SI.Current	I_nom (from NominalVI)	1	nom Current
Initialization
Types.Dynamics	dynType	system.dynType	transient or steady-state model

Connectors

Type	Name	Description
Ports.ACdq0_p	term_p	positive terminal
Ports.ACdq0_n	term_nt	negative terminal 'true'
Ports.ACdq0_n	term_nf	negative terminal 'false'
Modelica.Blocks.Interfaces.BooleanInput	control	true: p - nt closed, false: p - nf closed

Components

Type	Name	Default	Description
PS.Voltage	v_t
PS.Voltage	v_f
PS.Current	i_t
PS.Current	i_f

Name	Description
relaxationprotected

modelForcedCommSwitch

Information

Parameters

Connectors

Components

Contents