The IEEE Chile Section in collaboration with Chile PES Chapter are pleased to host a Virtual Distinguished Lecture (VDL) on “Flexible LCC HVDC for Energy Integration”. This pilot VDL is supported by Energy Center of Universidad de Chile and Solar Energy Research Center Chile.

  • Date: 26 May 2020
  • Time: 11:00 AM to 12:01 PM

Link DL:

Host: Chile Section Chapter, PE31

Centro de Energía

Universidad de Chile

Plaza Ercilla 847, Santiago, Chile

Co-sponsored by



Dr. Xiao-Ping Zhang

Dr. Xiao-Ping Zhang
Topic: Flexible LCC HVDC for Energy Integration

Abstract: It is well-known that traditional LCC (Line Commutated Converter) HVDC system is the key technology for long distance bulk power transmission.  However, the LCC HVDC has two serious shortcomings (a) not being able to control its reactive power and terminal AC voltages; and (b) vulnerable to commutation failures. This presentation will discuss the recent developments in LCC HVDC, which for the first time provides a new solution with a novel topology for Line-Commutated-Converter (LCC) HVDC, referred to as Flexible LCC HVDC, which can eliminate a very fundamental reliability problem, i.e. commutation failures of LCC HVDC, leading to blackouts, since its creation in 1950s.

We will show how in the concept of Flexible LCC HVDC we can transform the technology to Flexible LCC HVDC with controllable capacitors. The Flexible LCC HVDC, which is considered to be the next generation LCC HVDC, will be able to provide fast dynamic reactive power support for the AC systems and eliminate completely the commutation failures and hence support the energy integration and even global energy integration.  The Flexible LCC HVDC system with controllable capacitors will have the system’s ability of operating under negative extinction angle so as to achieve a wide range of reactive power control and, in particular, the ability of exporting reactive power to the AC grids. Some simulations on RTDS will be shown to demonstrate the effectiveness of the reactive power and voltage control, and commutation failure elimination method.


Professor Zhang is currently Chair in Electrical Power Systems, Director of Smart Grid, Birmingham Energy Institute, Co-Director of Birmingham Energy Storage Centre at the University of Birmingham, UK. He was an Alexander-von-Humboldt Fellow with the University of Dortmund, Germany from 1999 to 2000. He co-authored 5 books including the monograph “Flexible AC Transmission Systems: Modelling and Control” (New York: Springer, 2006 and 2012) and “Restructured Electric Power Systems: Analysis of Electricity Markets with Equilibrium Models” (IEEE Press/Wiley in 2010).

Prof Zhang is an IEEE PES Distinguished Lecturer on HVDC, FACTS and Wave Energy Generation. Professor Zhang is Chair of the IEEE WG on Test Systems for Economic Analysis. Prof Zhang is also Secretary of IFAC Technical Committee on Power and Energy Systems Control. He is advisor to the IEEE PES UK & Ireland Chapter. He has been appointed as a panel member of the International Exchanges Committee of Royal Society since Jan 2018. He is co-founder of the UK-China Strategic Workshop Series on Smart Grid. Professor Zhang has been made an IEEE Fellow for his contributions to “modeling and control of high-voltage DC and AC transmission systems.” He is also a Fellow of IET and Chinese Society for Electrical Engineering.


Address:Birmingham Energy Institute,, University of Birmingham, Birmingham, England, United Kingdom