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arXiv · 2404.19625

Dual-Port Grid-Forming Interconnecting Power Converters in Hybrid AC/DC Grids

Josep Arévalo-Soler·Mehrdad Nahalparvari·Dominic Gross·Eduardo Prieto-Araujo·Staffan Norrga·Oriol Gomis-Bellmunt
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Abstract

Interconnecting power converters (IPC) are the main elements enabling the interconnection of multiple high-voltage alternating current (HVAC) and high-voltage direct current (HVDC) subgrids. These converters can be classified either as grid-forming or grid-following. These roles can be assigned to both ac and dc terminals. This work compares state-of-the-art single-port grid-forming and grid-following control schemes with a dual-port grid-forming control scheme, which can simultaneously form a stable voltage on the ac and the dc sides. The dual-port grid-forming small-signal stability and dynamic behavior under fluctuations in the power flow are studied and compared against state-of-the-art control architectures. Moreover, the dual-port control scheme is validated and tested on a down-scaled laboratory platform with several transient events.

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Josep Arévalo-Soler, Mehrdad Nahalparvari, Dominic Gross, Eduardo Prieto-Araujo, Staffan Norrga, Oriol Gomis-Bellmunt. 2024-04-30. Dual-Port Grid-Forming Interconnecting Power Converters in Hybrid AC/DC Grids. https://doi.org/10.1109/jestpe.2024.3454992

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