Voltage–current characteristics of multiterminal HVDC-VSC for offshore wind farms

Voltage–current characteristics and equilibrium points for the DC voltages of multiterminal HVDC systems using voltage source converters are discussed. The wind farm rectifiers and grid connected inverters are analyzed through their operating modes, governing equations and graphical characteristics. Using the converter equations and the HVDC grid conductance matrix the equilibrium voltages and currents are found. Case studies are presented considering wind power generation, loss of a converter and voltage sags in the AC grid.

[1]  T. Ackermann.  Transmission Systems for Offshore Wind Farms , 2002, IEEE Power Engineering Review.

[2]  Jun Liang,et al.  Control of multi-terminal VSC-HVDC transmission for offshore wind power , 2009, 2009 13th European Conference on Power Electronics and Applications.

[3]  Jun Liang,et al.  Topologies of multiterminal HVDC-VSC transmission for large offshore wind farms , 2011 .

[4]  Lie Xu,et al.  Grid connection of large offshore wind farms using HVDC , 2006 .

[5]  M. Aberg,et al.  The Gotland HVDC Light project-experiences from trial and commercial operation , 2001 .

[6]  Takami Sakai,et al.  A New Control Method for Multiterminal HVDC Transmission Without Fast Communications Systems , 1983, IEEE Transactions on Power Apparatus and Systems.

[7]  D. Retzmann,et al.  A new Multilevel Voltage-Sourced Converter Topology for HVDC Applications , 2008 .

[8]  B. T. Ooi,et al.  Optimal Acquisition and Aggregation of Offshore Wind Power by Multiterminal Voltage-Source HVdc , 2002, IEEE Power Engineering Review.

[9]  Liangzhong Yao,et al.  Grid Integration of Large DFIG-Based Wind Farms Using VSC Transmission , 2007, IEEE Transactions on Power Systems.

[10]  Jos Arrillaga,et al.  High Voltage Direct Current Transmission , 2014 .

[11]  J. Reeve,et al.  Multiterminal HVDC Power Systems , 1980, IEEE Transactions on Power Apparatus and Systems.

[12]  R. Adapa,et al.  Expandable multiterminal DC systems based on voltage droop , 1993 .

[13]  X.I. Koutiva,et al.  Control of an HVdc Link Connecting a Wind Farm to the Grid for Fault Ride-Through Enhancement , 2007, IEEE Transactions on Power Systems.

[14]  H. Bjorklund,et al.  Challenges with Multi-Terminal UHVDC Transmissions , 2008, 2008 Joint International Conference on Power System Technology and IEEE Power India Conference.

[15]  I. Erlich,et al.  Enhanced Fault Ride-Through Method for Wind Farms Connected to the Grid Through VSC-Based HVDC Transmission , 2009, IEEE Transactions on Power Systems.

[16]  Nicholas Jenkins,et al.  Simulated Onshore-Fault Ride through of Offshore Wind Farms Connected through VSC HVDC , 2008 .

[17]  Xiao-Ping Zhang,et al.  Multiterminal voltage-sourced converter-based HVDC models for power flow analysis , 2004 .