| Title | Virtual Admittance PLL Structure for Grid-forming Power Converters in Microgrids |
|---|---|
| Authors | Tarraso, Andres , Ignacio Candela, Jose , LAI, NGOC BAO, BALTAS, NICHOLAS-GREGORY, RODRÍGUEZ CORTÉS, PEDRO |
| External publication | No |
| Means | Ieee Energy Conversion Congress And Exposition |
| Scope | Proceedings Paper |
| Nature | Científica |
| Publication date | 01/01/2020 |
| ISI | 000645593605058 |
| Abstract | Synchronization plays a fundamental role in connecting power electronic converters with the grid. Conventionally, the synchronous reference frame phase-locked loop (SRF-PLL) has been widely used to estimate the grid phase angle. Though SRF-PLL is effective under normal grid voltage conditions, its performance degrades drastically under weak grid conditions. This paper presents a control strategy for current controller of grid-connected power converters that contributes in the reduction of the negative effects of SRF-PLL during grid disturbances. The main control concept is based on virtual admittance. This approach is capable of operating effectively power converters when connected to weak grids and permit grid-forming operation. Simulation and experimental results are provided to validate the proposed controller. |
| Keywords | Microgrid; synchronization system; synchronous reference frame; power converter control |
| Universidad Loyola members |