Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
System parameters
| System parameter | Symbol | Value |
|---|---|---|
| DC link voltage | Vd | 600 V |
| Grid voltage | Vg | 230 V (RMS) |
| Grid frequency | fg | 50 Hz |
| Sampling rate | 0.2 μs | |
| Inverter-side inductance | L1 | 1.74 mH |
| Grid-side inductance | L2 | 0.68 mH |
| Filter capacitance | C | 10 μF |
| Inductor’s resistance | r1,2 | 0.2 Ω |
| Coefficient of NFTSMC | α, β, k1, k2 | 1.8, 1.3, 300, 1 |
| PMR gains | Kp, Kr, k5, k7 | 10, 2,000, 2,000, 2,000 |
| Bands of the hysteresis function | h | 2,000 |
Comparison of the proposed system with other works
| Reference | Huang et al. (2023) | Zhang and Fei (2023) | Sozanski and Szczesniak (2023) | Proposed |
|---|---|---|---|---|
| Transient response performance | Very high | Very high | Medium | Very high |
| Robustness | High | High | High | Very high |
| PWM method | PWM | PWM | PWM | Hysteresis |
| Switching frequency | 20 Khz | Not reported | 25.6 Khz | Not fixed |
| Non-linear load performance | Very high | Very high | Very high | Very high |
| Complexity | High | High | High | Low |
| Computational burden | Very high | High | High | Low |
| Best grid THD | 0.98 | 1.56 | Not reported | 0.33 |