Abstract
The rapid growth of renewable energy production increases the number of grid-connected inverters in the power system. The interface between the inverter and the grid may face stability issues, which can be assessed using impedance-based stability criterion. The frequency-dependent grid impedance is often an unknown parameter, and vastly simplified grid impedance models are widely used. Most common modeling approach is to use series-connected inductor as the grid impedance. However, measurements on real grids have shown the grid to be more complex, resonant, and time-variant. This paper introduces a grid-impedance model based on aggregation of sub-models, which drastically simplifies complex grid modeling, while still accurately captures resonances and possible time-variant behavior. Numerical sensitivity analysis is carried out for grid parameters to illustrate the significance of separate grid elements. Lastly, impedance measurements are shown for emulated full-order and aggregated impedance models in an experimental power hardware-in-the-loop setup.
| Original language | English |
|---|---|
| Title of host publication | The 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018) |
| Subtitle of host publication | September 23-27, 2018, Portland, Oregon, USA |
| Publisher | IEEE |
| Pages | 4179-4186 |
| Number of pages | 8 |
| ISBN (Electronic) | 978-1-4799-7312-5 |
| DOIs | |
| Publication status | Published - 6 Dec 2018 |
| Publication type | A4 Article in conference proceedings |
| Event | IEEE Energy Conversion Congress and Exposition - Portland, United States Duration: 23 Sept 2018 → 27 Sept 2018 |
Publication series
| Name | |
|---|---|
| ISSN (Electronic) | 2329-3748 |
Conference
| Conference | IEEE Energy Conversion Congress and Exposition |
|---|---|
| Country/Territory | United States |
| City | Portland |
| Period | 23/09/18 → 27/09/18 |
Publication forum classification
- Publication forum level 1
Access to Document
- Aggregated Modeling and Power Hardware-in-the-Loop Emulation of Grid Impedance
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