Grid Systems

The following example shows how to utilize the predefined systems. The available systems are listed after the examples.

Example — Using a predefined grid system

from pars.grid_config import get_default_system

config = get_default_system(name='Weak_LV_Grid_LCL_Filter_2L_conv')

The user can also create custom grid systems by combining individual components in examples/grid/pars/grid_parameter_sets.json, under parameter_sets as shown below

Example — Creating a grid system from components

"Weak_LV_Grid_LCL_Filter_2L_conv": {
  "description": [
      "2-level converter connected to a weak low voltage grid via an LCL filter"
  ],
  "grid": "Weak_LV_Grid",
  "filter": "LCL_Filter_fr_1300",
  "converter": "2L_LV_Converter"
}

The components are defined in the same file, and predefined components can be found in the components section.

Predefined Grid Systems

2-level converter connected to a weak low-voltage grid via an \(\textrm{LCL}\) filter

Component	Link	Details
Grid	Weak low-voltage grid	\(V_R = 400\,\textrm{V}\), \(I_R = 18\,\textrm{A}\)
Filter	LCL filter	\(f_R = 1300\,\textrm{Hz}\)
Converter	2-Level converter	\(V_{\textrm{dc}} = 750\,\textrm{V}\)

2-level converter connected to a strong low-voltage grid via an \(\textrm{LCL}\) filter

Component	Link	Details
Grid	Strong low-voltage grid	\(V_R = 400\,\textrm{V}\), \(I_R = 18\,\textrm{A}\)
Filter	LCL filter	\(f_R = 1300\,\textrm{Hz}\)
Converter	2-Level converter	\(V_{\textrm{dc}} = 750\,\textrm{V}\)

3-level converter connected to a strong medium-voltage grid via an \(\mathrm{L}\) filter

Component	Link	Details
Grid	Strong medium-voltage grid	\(V_R = 3300\,\textrm{V}\), \(I_R = 1575\,\textrm{A}\)
Filter	L filter	\(L_{\mathrm{fc}} = 0.19\,\mathrm{mH}\), \(R_{\mathrm{fc}} = 0.5\,\mathrm{m}\Omega\)
Converter	3-Level converter	\(V_{\textrm{dc}} = 5200\,\textrm{V}\)

3-level converter connected to a strong medium-voltage grid via an \(\textrm{LCL}\) filter

Component	Link	Details
Grid	Strong medium-voltage grid	\(V_R = 3300\,\textrm{V}\), \(I_R = 1575\,\textrm{A}\)
Filter	LCL filter	\(f_R = 380\,\textrm{Hz}\)
Converter	3-Level converter	\(V_{\textrm{dc}} = 5200\,\textrm{V}\)