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Comparison of voltage unbalance detection and measurement methods_
| Article | Signals used | Amount of sensors required | Sampling frequency | Tested for DC-link capacitance change | Uncontrolled rectifier specific |
|---|---|---|---|---|---|
| Widagdo et al. (2024) | Load phase currents | 3 | Unknown | No | No |
| Li et al. (2022) | Phase voltages | 3 | 8,000 Hz | No | No |
| Al-Naimi et al. (2021) | Phase voltages | 3 | 1,000 Hz | No | No |
| Sun et al. (2013) | Phase voltages | 3 | 600 Hz | No | No |
| Bogarra et al. (2022) | DC-link voltage ripple | 1 | 50,000 Hz | No | Yes |
| This paper | DC-link voltage ripple | 1 | 10,000 Hz | Yes | Yes |
Simulation model parameters
| Parameters | Value |
|---|---|
| Stator single phase resistance | 2.875 Ω |
| Stator single phase inductance | 9.5 mH |
| Generator voltage frequency | 50 Hz |
| DC-link capacitance | 4.7 mF |
| Load inductance | 1 mH |
| Load resistance | 100 Ω |
DC-link capacitance values under the test
| Case number | Total capacitance (μF) |
|---|---|
| 1 | 1175 |
| 2 | 1044 |
| 3 | 940 |
| 4 | 881 |
| 5 | 705 |