Abstract
The phase-shifting full-bridge converter is applied in the design of ESU (Energy Storage Unit) for DC microgrid and the batteries are adopted as its energy storage devices. The architecture of DC microgrid and the system operating mode switching based on the DC-bus voltage signal are introduced. The single-and dual- side phase-shifting principles of phase-shifting full-bridge converter are analyzed and the ESU control strategies in constant-voltage droop mode and constant-current mode are designed respectively. By combining the DC microgrid operating mode with the ESU control strategy, an ESU operating mode switching scheme based on the DC-bus voltage signal together with the command of DC microgrid central controller is proposed. An experiment platform is established and the experimental results of an ESU prototype demonstrate the switching between constant-voltage and constant-current operating modes based on the DC-bus signal and current command, verifying the effectiveness of the proposed ESU control strategy and switching scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 67-72 |
| Number of pages | 6 |
| Journal | Dianli Zidonghua Shebei/Electric Power Automation Equipment |
| Volume | 36 |
| Issue number | 3 |
| DOIs | |
| State | Published - 10 Mar 2016 |
| Externally published | Yes |
Keywords
- DC microgrids
- Electric batteries
- Energy storage
- Operating mode switching
- Phase-shifting control
- Phase-shifting full-bridge converter
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