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Virtual Impedance-based Grid Synchronization for Converters Connected Through Long Cables | IEEE Conference Publication | IEEE Xplore

Virtual Impedance-based Grid Synchronization for Converters Connected Through Long Cables


Abstract:

This paper proposes a synchronization scheme for grid-connected Voltage Source Inverters (VSI) without physical interface inductors, voltage sensing or conventional PLL a...Show More

Abstract:

This paper proposes a synchronization scheme for grid-connected Voltage Source Inverters (VSI) without physical interface inductors, voltage sensing or conventional PLL algorithms. Especially, issues with converters connected trough long cables are addressed. These cables present non-negligible LC characteristics that can lead to resonance peaks degrading current or voltage waveforms. A virtual impedance is used as grid coupling element, providing a virtualized synchronization point within software using only already available current-sensor information. Also, virtual resistance is used to actively dampen resonance peaks caused by cable characteristics. Theoretical analysis and simulation results are presented to verify the proposed strategy.
Date of Conference: 11-15 October 2020
Date Added to IEEE Xplore: 30 October 2020
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Conference Location: Detroit, MI, USA

References

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