Among the options currently under consideration is the use of a multi-terminal High Voltage Direct Current (HVDC) link to provide additional capacity across transmission boundaries in the onshore transmission system and potentially to be used in the connection of offshore generation. Such a multi-terminal High Voltage Direct Current (HVDC) link might prove to be the most overall economic and efficient solution available when wider developments are taken into account. National Grid has not previously implemented Voltage Source Converter (VSC) HVDC converters on the transmission system and no multi-terminal VSC HVDC system has been implemented anywhere in the world. The introduction of this technology onto the transmission system must be managed in a manner that takes due consideration of any potential technology risks.
The simulation will fulfil the role of a phantom trial in accordance with National Grid's policy for the introduction of new technology. The work aims to demonstrate that a multi-terminal VSC HVDC system as proposed is feasible, to identify potential problems with application of the technology, areas of further research and to inform specifications.
The use of the RTDS will allow for the simulation and evaluation of any converter topologies or control strategies that have been made public by suppliers or proposed by other parties.
Further to the primary objective of this research is the added benefit of developing the UK research capability in the field of HVDC. It is the aim of industry and academia to establish significant expertise in HVDC in the UK in order to ensure that the rapid expansion of complex HVDC systems across the UK and Europe occurs as smoothly as possible. This project supports this aim and will be followed by further proposals in the future.