Grid simulator

Description of the Grid Simulator component in Schematic Editor

The Grid Simulator is a component which consists of three single phase voltage sources, series resistances and inductances. It is used to simulate a three phase symmetric or asymmetric grid.

Figure 1. Component Icon

The internal structure of the Grid Simulator, with phase voltage, line voltage and phase current measurements included is shown in Figure 2.

Figure 2. Schematic diagram of the Grid Simulator component

The list of measurements available in the grid simulator is shown in Internal analog measurements of the grid simulator.

Calculation from S-U to R-L

R = p f V b 2 S b

L = V b 2 S b ( 1 - p f 2 ) 0.5 2 π f

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

R = V b 2 S b ( 1 + ( X / R ) 2 ) 0.5

L = R X / R 2 π f

  • R - resistance
  • L - inductance
  • Vb - nominal line voltage
  • f - frequency
  • Sb - short circuit capacity
  • pf - inductive power factor
  • X/R - x/r ratio

Internal analog measurements of the grid simulator

Analog output variable name Description
(name).I_phase_A Phase A current.
(name).I_phase_B Phase B current.
(name).I_phase_C Phase C current.
(name).V_phase_A Phase A voltage.
(name).V_phase_B Phase B voltage.
(name).V_phase_C Phase C voltage.
(name).V_source_phase_A Phase A source voltage.
(name).V_source_phase_B Phase B source voltage.
(name).V_source_phase_C Phase C source voltage.
(name).V_AB A-B line voltage.
(name).V_BC B-C line voltage.
(name).V_CA C-A line voltage.

Ports

  • A (electrical)
    • AC side port - phase A
  • B (electrical)
    • AC side port - phase B
  • C (electrical)
    • AC side port - phase C
  • N (electrical)
    • Neutral point port

Parameters

  • Model definiton
    • Specifies the set of parameters by choosing between R-L, S-U, and S-U and X/R.
  • Nominal line voltage
    • Specifies nominal line voltage.
  • Nominal frequency
    • Specifies nominal frequency.
  • Resistance per phase
    • Available only if Model definition is set to R-L.
    • Specifies resistance per phase.
  • Inductance per phase
    • Available only if Model definition is set to R-L.
    • Specifies inductance per phase.
  • Short circuit capacity
    • Available if Model definition is set to S-U or S-U and X/R.
    • Specifies short circuit capacity.
  • Inductive power factor
    • Available only if Model definition is set to S-U.
    • Specifies inductive power factor.
  • X/R ration
    • Available only if Model definition is set to S-U and X/R.
    • Specifies ratio between X and R values.