Table 1.
An overview of converter control methods of UPQC.
| Control |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Reference Generation |
Converter Control |
PQ Issues |
Integration of Active Sources | |||||||
| Ref. | Year | Shunt & Series | Synchronization | Shunt | Series | Harmonics | Reactive Power | Sag/ Swell | Unbalance | |
| [37] | 2018 | p − q theory | SMC | SMC | ✓ | ✓ | ✓ | ✓ | ||
| [35] | 2020 | SRF | PLL | Linear | Linear | ✓ | ✓ | ✓ | ✓ | |
| [8] | 2020 | Dual Compensation Strategy | 1-Φ PLL | SF-MR | PI-MR and SF-MR | ✓ | ✓ | |||
| [21] | 2020 | SRF | PLL | FCS - MPC | FCS - MPC | ✓ | ✓ | ✓ | ✓ | |
| [36] | 2020 | ICCS, LUnCS | 1-Φ PLL | Linear | Linear | ✓ | ✓ | ✓ | ✓ | |
| [22] | 2020 | Load Equivalent Conductance | - | HCC | HVC | ✓ | ✓ | ✓ | ✓ | |
| [13] | 2020 | improved SRF | Negative Feedback PLL | HCC | HVC | ✓ | ✓ | ✓ | ✓ | |
| [33] | 2021 | SRF | - | Linear | Linear | ✓ | Wind, SMES | |||
| [18] | 2023 | ESOGI-mFLL | ESOGI- mFLL | HCC | HVC | ✓ | ✓ | ✓ | ✓ | PV |
| [34] | 2024 | SOGI+PR | SOGI | Linear- PR | Linear- PR | ✓ | ✓ | |||
| [10] | 2024 | Shunt- pq-theory, Series- UVT | PLL | Linear | Linear | ✓ | ✓ | Battery, PV | ||
| Proposed Work | pq-theory with adaptive estimation | SMC-DPC | SMC-DPC | ✓ | ✓ | ✓ | ✓ | |||