Stability Analysis of a PMSG-Based Large Offshore Wind Farm Connected to a VSC-HVDC

This paper presents modal analysis of a large offshore wind farm using permanent magnet synchronous generator (PMSG)-type wind turbines connected to a voltage source converter HVDC (VSC-HVDC). Multiple resonant frequencies are observed in the ac grid of offshore wind farms. Their control is crucial for the uninterrupted operation of the wind farm system. The characteristics of oscillatory modes are presented using modal analysis and participation factor analysis. Sensitivity of critical modes to wind turbine design parameters and their impact on closed loop stability of the system are discussed. A comparison between a full wind farm model and an aggregated model is presented to show differences in the characteristics of critical modes observed in the models, and implication of using the models for stability studies It is concluded that robust control design is important for reliable operation of the system.

[1]  S.V. Araujo,et al.  LCL filter design for grid-connected NPC inverters in offshore wind turbines , 2007, 2007 7th Internatonal Conference on Power Electronics.

[2]  I. Erlich,et al.  Overvoltage phenomena in offshore wind farms following blocking of the HVDC converter , 2016, 2016 IEEE Power and Energy Society General Meeting (PESGM).

[3]  Li Wang,et al.  Stability Analysis of Four PMSG-Based Offshore Wind Farms Fed to an SG-Based Power System Through an LCC-HVDC Link , 2013, IEEE Transactions on Industrial Electronics.

[4]  Matthias Luther,et al.  Investigation of harmonic interaction between VSCHVDC systems and offshore wind farms with DFIGs , 2016, 2016 IEEE Power and Energy Society General Meeting (PESGM).

[5]  Bikash C. Pal,et al.  Electrical Oscillations in Wind Farm Systems: Analysis and Insight Based on Detailed Modeling , 2016, IEEE Transactions on Sustainable Energy.

[6]  Marta Molinas,et al.  Oscillatory phenomena between wind farms and HVDC systems: The impact of control , 2015, 2015 IEEE 16th Workshop on Control and Modeling for Power Electronics (COMPEL).

[7]  Jian Sun,et al.  Voltage Stability and Control of Offshore Wind Farms With AC Collection and HVDC Transmission , 2014, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[8]  Marco Liserre,et al.  Grid Converters for Photovoltaic and Wind Power Systems , 2011 .

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

[10]  R. Takahashi,et al.  New controller design for PMSG based wind generator with LCL-filter considered , 2012, 2012 XXth International Conference on Electrical Machines.

[11]  Dong Huang,et al.  The Study of Control Strategy for VSC-HVDC Applied in Offshore Wind Farm and Grid Connection , 2011, 2011 Asia-Pacific Power and Energy Engineering Conference.

[12]  Se-Kyo Chung,et al.  A phase tracking system for three phase utility interface inverters , 2000 .

[13]  Hui Huang,et al.  Small-signal modelling and analysis of wind turbine with direct drive permanent magnet synchronous generator connected to power grid , 2012 .

[14]  E. Camm,et al.  Harmonics and resonance issues in wind power plants , 2012, PES T&D 2012.

[15]  Nick Jenkins,et al.  Electrical resonance instability study in HVDC-connected Offshore Wind Power Plants , 2016, 2016 IEEE Power and Energy Society General Meeting (PESGM).