Professor Lie Xu

Electronic and Electrical Engineering


Personal statement

I joined the University in 2013 and is currently a Professor in the Department of Electronic and Electrical Engineering. I received my PhD in Electrical engineering from University of Sheffield in 2000 and started my career with ALSTOM, developing VSC based HVDC systems. My main research interests and experiences are in the areas of power electronics, converter control for grid connection of renewables, control and operation of HVDC systems and stability of power network with large converter penetration. I have published over 200 journal and conference papers and received the 2013 IET Renewable Power Generation Premium Award for my published paper “DC voltage control and power dispatch of a multi-terminal HVDC system for integrating large offshore wind farms”.

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Area of Expertise

  • Power electronic system modelling and control design
  • HVDC system modelling and control
  • Stability assessment and improvement of future power system
  • Renewable energy integration


PhD in Electrical Eneginnering from University of Sheffield, 2000

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The effect of grid-connected converter control topology on the diagonal dominance of converter output impedance
Henderson Callum, Egea-Alvarez Agusti, Fekriasl Sajjad, Knueppel Thyge, Amico Gabriele, Xu Lie
IEEE Open Access Journal of Power and Energy, pp. 1-11 (2023)
Modelling of a high-temperature superconductor HVDC cable under transient conditions
Chaganti Pavan, Yuan Weijia, Zhang Min, Xu Lie, Hodge Eoin, Fitzgerald John
IEEE Transactions on Applied Superconductivity Vol 33 (2023)
Chance-constrained optimization of storage and PFC capacity for railway electrical smart grids considering uncertain traction load
Chen Yinyu, Chen Minwu, Xu Lie, Liang Zongyou
IEEE Transactions on Smart Grid (2023)
Inertia and frequency support from Britain's AC powered trains
Henderson Callum, Egea-Alvarez Agusti, Rull-Duran Joan, Nedd Marcel, Papadopoulos Panagiotis N, Xu Lie
IEEE Transactions on Sustainable Energy Vol 14, pp. 1259-1268 (2023)
Grid strength impedance metric : an alternative to SCR for evaluating system strength in converter dominated systems
Henderson Callum, Egea-Alvarez Agusti, Knueppel Thyge, Yang Guangya, Xu Lie
IEEE Transactions on Power Delivery, pp. 1-10 (2023)
Analysis of multi-converter network impedance using MIMO stability criterion for multi-loop systems
Henderson Callum, Egea-Alvarez Agusti, Xu Lie
Electric Power Systems Research Vol 211 (2022)

More publications

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Research Interests

  • Power electronics for renewable power generation and integration
  • HVDC system for renewable energy integration and network connection
  • Stability of converter dominated power network
  • DC Microgrid


Pan Continental DC Grids
Xu, Lie (Principal Investigator) Egea Alvarez, Agusti (Co-investigator) Chen, Yin (Research Co-investigator)
01-Jan-2023 - 29-Jan-2024
Introduction to Power Electronics and Electric Machines
Ahmed, Khaled (Principal Investigator) Egea Alvarez, Agusti (Co-investigator) McNeill, Neville (Co-investigator) Xu, Lie (Co-investigator)
26-Jan-2023 - 08-Jan-2023
SIF Black start Demonstrator from offshore wind (SIF BLADE)
Egea Alvarez, Agusti (Principal Investigator) Ahmed, Khaled (Co-investigator) Dysko, Adam (Co-investigator) Tzelepis, Dimitrios (Co-investigator) Xu, Lie (Co-investigator)
01-Jan-2023 - 30-Jan-2023
Superconducting Direct Current for a Decarbonised 2050 Grid: PDRA 3
Xu, Lie (Principal Investigator) Egea Alvarez, Agusti (Co-investigator) Yuan, Weijia (Co-investigator) Chen, Yin (Research Co-investigator)
Linked to 180100 for overarching agreement
07-Jan-2022 - 31-Jan-2024
HVDC-based grid architectures for reliable and resilient WIdeSprEad hybrid AC/DC transmission systems
Egea Alvarez, Agusti (Principal Investigator) Ahmed, Khaled (Co-investigator) Bell, Keith (Co-investigator) Xu, Lie (Co-investigator)
01-Jan-2022 - 31-Jan-2026
Distributed multiport converters for integration of renewables, storage systems and loads while enhancing performance and resiliency of modern distributed networks (iPLUG)
Egea Alvarez, Agusti (Principal Investigator) Xu, Lie (Co-investigator)
01-Jan-2022 - 31-Jan-2025

More projects

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Professor Lie Xu
Electronic and Electrical Engineering

Tel: 548 2966