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Impact of of multi-terminal HVDC grids on AC system stability and operation

pubblicazioni - Memoria

Impact of of multi-terminal HVDC grids on AC system stability and operation

La memoria presenta alcuni risultati della demo DC GRID del progetto europeo di ricerca (FP7) TWENTIES, riguardo all’impatto, che le reti HVDC possono avere sulla stabilità dei sistemi in corrente alternata (AC) cui esse sono collegate, ma anche ai servizi che possono essere forniti ai sistemi AC continentali.

High-Voltage Direct Current (HVDC) grids (DCG) based on Voltage Source Converters (VSC) are being widely investigated to integrate multiple offshore wind farms dispersed over wide areas into AC onshore networks. The paper presents some results of the « DC GRID » demo within the European research project (FP7) TWENTIES, regarding the impact of MTDC systems on the AC systems they are connected to: specific focus is devoted to provision of advanced ancillary services (primary frequency controls, Fault Ride Through capability to AC faults, reactive power support), and to the possible contribution of the MTDC grid in enhancing the operational security of AC systems and in restarting them after partial or complete blackouts.

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