TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Aggregated Modeling and Power Hardware-in-the-Loop Emulation of Grid Impedance

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoThe 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018)
AlaotsikkoSeptember 23-27, 2018, Portland, Oregon, USA
KustantajaIEEE
Sivut4179-4186
Sivumäärä8
ISBN (elektroninen)978-1-4799-7312-5
DOI - pysyväislinkit
TilaJulkaistu - 6 joulukuuta 2018
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIEEE Energy Conversion Congress and Exposition - Portland, Yhdysvallat
Kesto: 23 syyskuuta 201827 syyskuuta 2018

Julkaisusarja

Nimi
ISSN (elektroninen)2329-3748

Conference

ConferenceIEEE Energy Conversion Congress and Exposition
MaaYhdysvallat
KaupunkiPortland
Ajanjakso23/09/1827/09/18

Tiivistelmä

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.