On advanced control strategies for DFIG-based wind energy conversion systems during voltage unbalance

The penetration level of decentralized power generation plants based on renewable energy sources are continuously increasing with wind energy having a significant share. Considering present developments towards a purely renewable energy based electricity supply, Wind Energy Conversion Systems (WECS) play an important role in securing a stable, reliable and continuous supply of energy. Particularly in weak distribution grids with frequent power quality implications, WECS need to reliably operate and stable the grid. This paper presents advanced control strategies for DFIG-type WECS during unbalanced voltage conditions Applying resonant controllers, negative sequence components are well-controlled, contributing to an improved operation behavior particularly during less severe but persistent unbalanced grid voltages.

[1]  Constantinos Sourkounis,et al.  Control of a doubly-fed induction generator under grid faults using a d-q hysteresis current regulator , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.

[2]  Roberto Cárdenas,et al.  Overview of control systems for the operation of DFIGs in wind energy applications , 2013, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society.

[3]  Peng Zhou,et al.  Improved Direct Power Control of a DFIG-Based Wind Turbine During Network Unbalance , 2009, IEEE Transactions on Power Electronics.

[4]  M. Yamamoto,et al.  Active and reactive power control of doubly-fed wound rotor induction generator , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[5]  Jon Clare,et al.  Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation , 1996 .

[6]  M. Liserre,et al.  Multiple harmonics control for three-phase grid converter systems with the use of PI-RES current controller in a rotating frame , 2006, IEEE Transactions on Power Electronics.

[7]  J.A. Ferreira,et al.  Operation of Grid-Connected DFIG Under Unbalanced Grid Voltage Condition , 2009, IEEE Transactions on Energy Conversion.

[8]  Constantinos Sourkounis,et al.  Evaluation of state-based controlled STATCOM for DFIG-based WECS during voltage sags , 2016, 2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA).

[9]  Constantinos Sourkounis,et al.  Grid Code Requirements for Wind Power Integration in Europe , 2013 .

[10]  Constantinos Sourkounis,et al.  Hysteresis-based PI state control of grid-connected voltage source converter with LCL filter for power conditioning , 2017, 2017 IEEE Industry Applications Society Annual Meeting.

[11]  Constantinos Sourkounis,et al.  Mitigation of oscillations in DFIG-based WECS operating in unbalanced networks , 2015, 2015 23rd Mediterranean Conference on Control and Automation (MED).

[12]  Barry W. Williams,et al.  Improved Control of DFIG Systems During Network Unbalance Using PI–R Current Regulators , 2009, IEEE Transactions on Industrial Electronics.

[13]  Lie Xu,et al.  Dynamic Modeling and Control of DFIG-Based Wind Turbines Under Unbalanced Network Conditions , 2007, IEEE Transactions on Power Systems.

[14]  Ahmadreza Tabesh,et al.  Control of DFIG Wind Power Generators in Unbalanced Microgrids Based on Instantaneous Power Theory , 2017, IEEE Transactions on Smart Grid.

[15]  Heng Nian,et al.  Direct Power Control of DFIG System Without Phase-Locked Loop Under Unbalanced and Harmonically Distorted Voltage , 2018, IEEE Transactions on Energy Conversion.

[16]  G. Abad,et al.  Direct Power Control of Doubly-Fed-Induction-Generator-Based Wind Turbines Under Unbalanced Grid Voltage , 2010, IEEE Transactions on Power Electronics.