Single-stage buck–boost inverter with feedforward control
The off-grid inverter with the inverter side voltage as the feedback parameter has the advantages of a single voltage loop, simple control parameter design, and low cost. But the output voltage accuracy is not enough. A single-stage off-grid inverter with feedforward control is recommended to improv...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472300896X |
| Summary: | The off-grid inverter with the inverter side voltage as the feedback parameter has the advantages of a single voltage loop, simple control parameter design, and low cost. But the output voltage accuracy is not enough. A single-stage off-grid inverter with feedforward control is recommended to improve the output voltage accuracy. It has a higher voltage regulation rate compared to the proportional–integral (PI) control and it can track a given AC signal at any frequency compared to the proportional-resonant (PR) control. Bus capacitors can employ thin-film capacitors for improved reliability and higher power density and the voltage stress on power devices can be decreased by controlling the intermediate bus voltage to a non-constant value. The working principle is explained. The design principles of the parameters are provided and the external characteristics and stability of the system are analyzed. A simulation model was built to verify the control strategy for improving voltage accuracy and decreasing voltage stress. |
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| ISSN: | 2352-4847 |