Estimation of an unbalanced grid impedance using a three-phase power converter
| Autor: | Ville Pirsto, Mikko Routimo, Marko Hinkkanen, Jarno Kukkola |
|---|---|
| Přispěvatelé: | Electric Drives, Renewable Energy in Electrical Power, Department of Electrical Engineering and Automation, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Excitation signal 020209 energy 020208 electrical & electronic engineering Impedance measurement 02 engineering and technology Converter control Three-phase Control theory 0202 electrical engineering electronic engineering information engineering Point of common coupling Three-phase system Sliding discrete fourier transform Electrical impedance Voltage reference Estimation technique Grid impedance Voltage |
| Popis: | This paper proposes a real-time method for estimating an unbalanced grid impedance using a three-phase converter. In the method, a periodic single-frequency or multi-frequency excitation signal is added to the converter voltage reference. The converter measures currents and voltages at the point of common coupling. The impedance estimate is obtained from the measurements using sliding discrete Fourier transform (SDFT). The method is experimentally validated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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