Cerca nel sito per parola chiave

pubblicazioni - Memoria

BEST PATHS Project: Real-Time Demonstrator for the Integration of Offshore Wind Farms using Multi-Terminal HVDC Grids

pubblicazioni - Memoria

BEST PATHS Project: Real-Time Demonstrator for the Integration of Offshore Wind Farms using Multi-Terminal HVDC Grids

Un’efficace analisi e comprensione dei futuri sistemi di trasmissione offshore multi-terminale HVDC (MTDC) richiede un’accurata modellizzazione e simulazione di tutti i componenti, tuttavia una pratica standard consiste nell’utilizzare modelli generici. Un tale approccio può portare a interazioni dinamiche indesiderate tra i componenti in caso di disturbi in rete o cambiamenti nelle condizioni operative.Il lavoro presentato in questa memoria promuove i risultati iniziali raggiunti nell’ambito del progetto BEST PATHS dell’UE, che consistono nella validazione dei risultati di simulazione attraverso un dimostratore in tempo reale che comprende una rete MTDC a quattro terminali basata su convertitori multilivello modulari da 60 kW, una rete in corrente alternata, un emulatore di rete in corrente alternata, un emulatore di turbina eolica e dei sistemi di controllo.

Voltage source converter (VSC) based HVDC links have been deployed to increase cross-country exchange capabilities and to transmit power from remote offshore wind farms. The delivery of smooth and reliable power to onshore AC grids may be further facilitated by connecting additional VSCs to form a multi-terminal HVDC (MTDC) grid. It is expected that an MTDC system will not only enable excess energy to be transferred between countries, but will also increase the functionality and reliability of the network. An effective analysis and understanding of future offshore MTDC systems requires accurate modelling and simulation of all components – ranging from wind turbines (WTs) to the DC grid.

Special attention should be dedicated to existing AC onshore grids and to the different available VSC topologies. Manufacturers normally develop detailed simulations of their equipment separately; however, a standard practice is to use generic models for the components that they do not manufacture. Such an approach may lead to unwanted dynamic interactions between components upon disturbances or changes in operating conditions.

To bridge this gap, partners within the European Commission-funded multi-demonstration project BEST PATHS are working towards removing technical barriers preventing the large scale penetration of renewable generation in Europe. The work presented in this paper furthers the initial outputs of the project by validating simulation results through a real-time demonstrator. This facility comprises a four-terminal MTDC grid based on 60 kW modular multilevel converters, an AC grid, an AC grid emulator, a WT emulator and control systems.

Progetti

Commenti