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| Content Provider | IET Digital Library |
|---|---|
| Author | Pérez, Javier Roldán Cabero, Alberto Rodríguez Prodanovic, Milan |
| Abstract | The emulation of synchronous machines is becoming an attractive solution to provide virtual inertia and voltage support to weak grids and microgrids, representing an alternative to conventional current-injection control strategies. However, synchronverters operate as voltage sources and this makes it difficult to limit the current when an event like voltage sag takes place. Here, a method to limit the output current of synchronverters in parallel connection is proposed. First of all, a fictitious reference current is generated, and its value is then followed by an internal current controller. A method to avoid the loss of synchronism when the current saturates is proposed and studied in detail. Also, the implementation of the controller is addressed carefully. All the control system improvements are tested on a prototype consisting of two 15 kVA synchronverters connected in parallel to a configurable weak grid. |
| Starting Page | 3516 |
| Ending Page | 3520 |
| Page Count | 5 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 17, Jun (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/17 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8218 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2019-01-22 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Control of Electric Power System Control System Improvements Current Control Current Saturates Electric Current Control Frequency Control Frequency Regulation Internal Current Controller Parallel Connection Parallel Current-controlled Synchronverters Power Converter Power Grid Power Supplies to Apparatus Power System Control Reference Current Synchronous Machine Virtual Inertia Voltage Control Voltage Regulation Voltage Sag Voltage Source Voltage Support Voltage-source Converter Weak Grid |
| Content Type | Text |
| Resource Type | Article |
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