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| Content Provider | IET Digital Library |
|---|---|
| Author | Zare, Mohammad Hadi Mohamadian, Mustafa Beiranvand, Reza |
| Abstract | In single-phase grid-connected photovoltaic inverters, the input power is constant during the grid period, whereas the output power oscillates at double-line frequency. Therefore, electrolytic capacitors are widely used to handle the input and output power differences. However, these capacitors have short lifetime which degrade the inverter reliability. This paper proposes a control strategy to turn a conventional four-switch flyback-based inverter to an inverter equipped with a series power decoupling circuit. Therefore, a long lifetime film capacitor can be used as the main energy storage. The modified inverter has an inherent snubber circuit, which can restore energy of the transformer leakage inductance and improves its overall efficiency. The control strategy can realise maximum power point tracking and inject a sinusoidal low total harmonic distortion current to the grid. A 100 W prototype inverter has been built to verify operation and feasibility of the proposed control strategy. |
| Starting Page | 517 |
| Ending Page | 524 |
| Page Count | 8 |
| ISSN | 17554535 |
| Volume Number | 10 |
| e-ISSN | 17554543 |
| Issue Number | Issue 5, Apr (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/10/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0349 |
| Journal | IET Power Electronics |
| Publisher Date | 2016-12-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Capacitor Control of Electric Power System Control Strategy Double-line Frequency Electrolytic Capacitor Four-switch Flyback-based Inverter Grid Period Harmonic Distortion Inherent Snubber Circuit Inverter Reliability Invertors Long Lifetime Film Capacitor Main Energy Storage Maximum Power Point Trackers Photovoltaic Power System Power 100 W Power Electronics Power Grid Power Supply Series Power Decoupling Capability Series Power Decoupling Circuit Single-phase Grid-connected Photovoltaic Inverter Single-phase Power Grid Single-stage AC Module Sinusoidal Low Total Harmonic Distortion Current Snubbers Solar Power Stations Supervisory Circuit Transformer Leakage Inductance |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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