The model treats the GCT as a time-varying resistance: (R_on = 0.001\ \Omega), (R_off = 1\ M\Omega). 3.1 AC Side Harmonics (Without Filtering) DFT Pro computed the following characteristic harmonics for a 12-pulse converter (p=12):

| Harmonic Order | Magnitude (% of fundamental) | Phase (deg) | |----------------|------------------------------|-------------| | 11th | 8.2% | -142 | | 13th | 6.9% | +158 | | 23rd | 3.1% | -88 | | 25th | 2.5% | +94 |

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Where (V_GK) is gate-cathode voltage and (L_G) is gate inductance. DFT Pro models non-linear components using harmonic Norton equivalents. Our model parameters:

| Parameter | Value | |-----------|-------| | V_DC (link) | 500 kV | | I_L (load) | 2 kA | | GCT snubber cap | 0 µF (snubberless) | | Switching freq | 50/60 Hz | | Analysis window | 100 ms |

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Dft Pro Gct May 2026

The model treats the GCT as a time-varying resistance: (R_on = 0.001\ \Omega), (R_off = 1\ M\Omega). 3.1 AC Side Harmonics (Without Filtering) DFT Pro computed the following characteristic harmonics for a 12-pulse converter (p=12):

| Harmonic Order | Magnitude (% of fundamental) | Phase (deg) | |----------------|------------------------------|-------------| | 11th | 8.2% | -142 | | 13th | 6.9% | +158 | | 23rd | 3.1% | -88 | | 25th | 2.5% | +94 | dft pro gct

(Your Name/Institution)

Where (V_GK) is gate-cathode voltage and (L_G) is gate inductance. DFT Pro models non-linear components using harmonic Norton equivalents. Our model parameters: The model treats the GCT as a time-varying

| Parameter | Value | |-----------|-------| | V_DC (link) | 500 kV | | I_L (load) | 2 kA | | GCT snubber cap | 0 µF (snubberless) | | Switching freq | 50/60 Hz | | Analysis window | 100 ms | Our model parameters: | Parameter | Value |