New converter technology and inter-operability of offshore HVDC

  • Supervisors: Prof. Stephen Finney (University of Strathclyde), Dr Lie Xu (University of Strathclyde),
    Dr. Olimpo Anaya-Lara,  (University of Strathclyde), Dr. Ewen Macpherson, (University of Edinburgh)
  • Sponsoring Company: Det Norske Veritas (DNV)
  • PhD Student: Ioannis Antoniou

Over the coming decades the European electricity transmission network will have to adapt to accommodate the large-scale deployment of offshore wind turbines and rapidly increasing transnational power flows.  These changes will require a massive increase in the use of High voltage DC as a means of power transmission 
Although conventional, current source, thyristor based, LCC HVDC is well established it is poorly suited to both the connection of offshore generation and the development of HVDC networks. Voltage source HVDC provides can provide the necessary functionality but early implementations were limited in terms or ratings and efficiency. The advent of high voltage multi-level voltage converters technology has reduced conversion losses to levels that are now comparable with that of convention thyristor based LCC systems. However significant advances are still to be achieved in fault tolerance, loss reduction, reduced footprint, inter-operability and flexibility of control.

As VSC technology continues to evolve, HVDC networks will have to operate with a range of converter designs and legacy installations. The interaction and control of different converter designs will be a key feature to achieving extendable HVDC networks.  

The major aim is to investigate new VSC designs/topologies to make them more robust, reliable efficient and cost effective in wind turbine application and bulk power transmission in offshore HVDC application.