Description of the Split-phase Grid component in Schematic Editor.

The Split-phase Grid is a component which consists of two single phase voltage sources with series resistances and inductances. It is used to simulate a single-phase or split-phase symmetric or asymmetric grid.

The internal structure of the Split-phase grid is shown in Figure 1. Phase voltage, line voltage and phase current measurements are included, as shown in Figure 1. In Table 1 the schematic symbol and properties window of the Split-phase grid are shown.

Table 1. Split-phase Grid in the Residential Energy library
Component Component dialog window Component parameters

split phase grid 01

split phase grid 02

split phase grid 03

split phase grid 04

  • Model definition: R-L, S-U, or S-U and X/R

  • Nominal line voltage (Vrms)

  • Nominal frequency (Hz)

  • Resistance per phase (Ω)

  • Inductance per phase (mH)

  • Line short circuit capacity (VA)

  • Inductive power factor

  • X/R ratio
split phase grid 05
Figure 1. Schematic diagram of the Split-phase Grid component

The list of measurements available in the Split-phase Grid is shown in Internal analog measurements of the Split-phase Grid.

Calculation from S-U to R-L

\[R = \frac{pf \cdot V_b^{2}} {S_b}\] \[L = \frac{\frac{V_b^{2}} {S_b} \cdot \sqrt{1-pf^2}} {2 \cdot \pi \cdot f}\]

Calculation from S-U and X/R to R-L

\[R = \frac{V_b^{2}} {S_b\cdot\sqrt{1+(X/R)^2}}\] \[L = R\cdot\frac{X/R} {2 \cdot \pi \cdot f}\]

  • R - resistance (Ω)

  • L - inductance (H)

  • Vb - nominal line voltage (Vrms)

  • f - frequency (Hz)

  • Sb - line short circuit capacity (VA)

  • pf - inductive power factor

  • X/R - X/R ratio

Internal analog measurements of Split-phase Grid

Analog output variable name Description

(name).I_phase_A

Phase A current.

(name).I_phase_B

Phase B current.

(name).V_phase_A

Phase A voltage.

(name).V_phase_B

Phase B voltage.

(name).V_source_phase_A

Phase A source voltage.

(name).V_source_phase_B

Phase B source voltage.

(name).V_AB

A-B line voltage.