Review Article
A Review of Control Techniques and Energy Storage for Inverter-Based Dynamic Voltage Restorer in Grid-Integrated Renewable Sources
Table 18
Comparison of various multilevel inverter topologies in DVR.
| | Ref. no. | Inverter topology | Energy storage | Injection transformer | Compensation technique | Compensation capabilities | Switches/phase | No. of levels | Modulation technique | THD |
| | [77] | Buck-boost AC/AC converter | Without DC-link | Not present | IPC | Both | 5 | 5 | Pulse width modulation | — | | [78] | Three leg AC/AC converter | Without DC-link | Not present | IPC | Both | 6 | — | High frequency PWM | 2.02 | | [203] | Direct AC–AC converter | Without DC-link | Present | PSC | Only sag | 4 | — | | — | | [163] | Diode clamped | Constant source | Present | — | Only sag | 24 | 5 | Multicarrier PWM | — | | [164] | Flying-capacitor | Constant source | Present | — | Only sag | 24 | 5 | Phase shifted PWM | — | | [144] | CHB MLI | DC-link | Present | Zero energy | Only sag | 24 | 13 | Pulse width modulation | — | | [261] | CHB MLI | DC-link | Not present | MEC | Only sag | 8 | 7 | Phase shift PWM | — | | [160] | CHB MLI | Constant source | Present | — | Only sag | 16 | 9 | Fundamental frequency modulation | 2.8 | | [165] | 3 − ϕ phase inverters | Constant source | Present | — | Only sag | — | 5 | Level shifted PWM | — | | [263] | T-type MLI | Without DC-link | Not present | IPC | Both | 8 | 5 | Reduced carrier PWM | 2.77 | | [264] | CHB MLI | Constant source | Present | MEC | Only sag | 12 | 7 | Phase shifted carrier based PWM | — | | [159] | 3 − ϕ phase six switch inverter | Constant source | Present | IPC | Both | - | 3 | Space vector PWM | — | | [265] | CHB MLI | DC-link | Present | Hybrid | Only sag | 12 | 7 | Phase shift PWM | — | | [157] | CHB MLI | DC-link | Present | Positive and negative sequence | Only sag | 40 | - | Carrier phase shifting sine Wave PWM | 1.94 | | [266] | CHB MLI | DC-link | Not present | Hybrid | Both | 16 | 9 | Multicarrier PWM | — | | [259] | TCHB MLI | DC-link | Present | IPC, PSC | Only sag | 5 | 5 | Pulse width modulation | 4.78 | | [168] | CHB MLI | DC-link | Not present | Postsag | Only sag | — | 17 | Discontinuous multilevel space vector modulation | — | | [260] | Simplified four level inverter | DC-link | Not present | — | Only sag | 8 | 7 | — | 1.23 | | [267] | CHB MLI | Constant source | Present | MEC | Only sag | 12 | 7 | Phase shifted carrier PWM | 1.73 | | [158] | HB MLI | DC-link | Present | Hybrid | Only sag | — | — | SPWM | | | [268] | CHB MLI | Constant source | Not present | — | Only sag | 20 | 11 | — | — | | [269] | RC MLI | Constant source | Present | PSC | Only sag | 12 | 23 | Nearest level voltage control | 1.28 |
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