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| Content Provider | IET Digital Library |
|---|---|
| Author | Sefa, Ibrahim Ozdemir, Saban Komurcugil, Hasan Altin, Necmi |
| Abstract | This study deals with various Lyapunov-function-based control (LFBC) schemes proposed for a single-phase grid-connected voltage source inverter with LCL filter. Use of LCL filter causes resonance which may adversely affect the controller's stability. The conventional (CLFBC) scheme employing the inverter-side current guarantees the asymptotic global stability, but it is not able to damp the resonance. As a remedy to the poor resonance damping, the adoption of grid-current and capacitor-voltage feedback schemes have been investigated. Although the former offers a globally asymptotically stable system, it cannot improve the poor resonance damping. However, the CLFBC with capacitor-voltage feedback scheme not only preserves the global stability, but also improves the resonance damping substantially. The analytical equations of the closed-loop poles for each control scheme are provided which can be used to compute the pole positions and the damping ratio needed for a desired response. Furthermore, the effect of changing controller gains on the loci of closed-loop poles is also studied. Simulation and experimental results obtained from 3.3 kW system demonstrate that the CLFBC with capacitor-voltage feedback scheme not only offers a global stability, but also leads to good quality sinusoidal grid current with reasonable total harmonic distortion and fast dynamic response. |
| Starting Page | 1473 |
| Ending Page | 1482 |
| Page Count | 10 |
| ISSN | 17521416 |
| Volume Number | 11 |
| e-ISSN | 17521424 |
| Issue Number | Issue 11, Sep (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/11/11 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2016.0566 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2017-07-03 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Asymptotic Global Stability Capacitor Capacitor-voltage Feedback Scheme CLFBC Scheme Closed Loop System Closed-loop Pole System Control of Electric Power System Conventional Lyapunov-function Based Control Scheme Dynamic Response Feedback Grid-current Feedback Scheme Harmonic Distortion Harmonics Inverter Side Current Invertors LC Circuit LCL Filter Lyapunov Method Power 3.3 KW Power Electronics Power Grid Power Harmonic Filter Power Supply Power Supply Quality Resonance Damping Single-phase Grid Connected Voltage-source Inverter Stability Stability in Control Theory Supervisory Circuit Total Harmonic Distortion Voltage-source Converter |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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