Gs evaluation for 2-level inverter

The optimal G_S parameter is obtained with the DC-Bus voltage and the nominal RMS AC-current.

Based on the obtained G_S and Ts_eHS, equivalent impedance for an open, or close switch can be calculated.

This should be considered to make sure their values will not have to much impact on the simulation result.

Gs evaluation for breakers

Choosing the right Gs result in finding the best trade off between the C_Open and the L_Close of a switch.

First, we need to identify nominal power of the circuit to find the nominal impedance of the circuit Z_Base.

If 1% leakage current is acceptable, Z_Open should be 100 times larger.

Using the network frequency, we can get C_Open value based on Z_Open and F_Grid.

Knowing C_Open, and Ts_eHS, G_S can be calculated

Finally, L_Close must be calculated to validate it will not impact simulation result. Furthermore, if there is an inductance in series with the breaker, L_Close can be subtracted from this inductance. This ensure the current value but may result in an error on the phase and amplitude the voltage measured near the breaker.

Having the largest Z_Open is desirable, but it will result in a larger L_Open. Again, this can be mitigated if there is a serial inductance with the breaker.