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Content Provider | IET Digital Library |
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Author | Wu, Jinn Chang Jou, Hurng Liahng Huang, Pei Hsuan |
Abstract | This study proposes a seven-level power conversion system for a solar power generation system. This seven-level power conversion system consists of a DC–DC power converter and a cascade DC–AC inverter. The cascade DC–AC inverter comprises a full-bridge inverter and a T-type inverter. The T-type inverter generates a three-level quasi-square-wave voltage and the full-bridge inverter provides a three-level high-frequency pulse voltage. The amplitude of the three-level quasi-square-wave voltage is double that of the three-level high-frequency pulse voltage, so seven levels of AC voltage are synthesized. Only the full-bridge inverter with lower DC bus voltage uses high-frequency switching so switching losses are effectively reduced. The novelty of the proposed cascade DC–AC inverter is that the output power of T-type inverter is controlled by regulating the DC bus voltage, so no real power is supplied from the full-bridge inverter and an independent power source is not required to provide power to the full-bridge inverter. The negative terminal voltage for solar cell array keeps almost constant to reduce the leakage current of proposed seven-level power conversion system. A hardware prototype with a digital signal processor controller is developed to verify the performance of seven-level power conversion system for a solar power generation system. |
Starting Page | 1387 |
Ending Page | 1394 |
Page Count | 8 |
ISSN | 17521416 |
Volume Number | 14 |
e-ISSN | 17521424 |
Issue Number | Issue 8, Jun (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/14/8 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.1439 |
Journal | IET Renewable Power Generation |
Publisher Date | 2020-03-02 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Bridge Circuit Cascade DC–AC Inverter Control of Electric Power System DC Bus Voltage Regulation DC-DC Power Converter DC–DC Power Converter Full-bridge Inverter High-frequency Pulse Voltage Leakage Current Photovoltaic Power System Power Generation Control Power System Protection Pulse Width Modulation PWM Invertors Seven-level Power Conversion System Solar Cell And Array Solar Cell Array Solar Power Generation System Solar Power Stations Switching Converter T-type Inverter Three-level Quasisquare Wave Voltagwe Voltage Control |
Content Type | Text |
Resource Type | Article |
Subject | Renewable Energy, Sustainability and the Environment |
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