DC Microgrid with Wind Energy Conversion System Based on Switched Reluctance Generator Operating in Grid Connected Mode

This article presents a proposal to control a DC microgrid with distributed wind energy conversion system (WECS) based on switched reluctance generator (SRG) operation in the grid connected mode. SRG is recommended to be used in applications with a wide range of speed, such as WECS. On the other hand, DC microgrids are gaining importance as an alternative for AC microgrids because DC grids are more reliable, efficient and simple to control. Since SRG generates direct current, these machines are natural candidates to operate in DC microgrids. In this paper, direct power control is applied to generate the maximum output power from a wind turbine with SRG. Proper distinction between low and high speeds of operation is presented. A bidirectional DC-DC converter is used to connect the wind turbine in the DC microgrid in order to achieve the SRG optimal excitation voltage while the DC bus is kept constant. A voltage source converter is employed to build up the DC bus from the AC grid. Energy storage system and customer loads are included in the simulation. The simulation results have shown that the proposed DC microgrid control with SRG penetration is feasible, reliable and achieve high performance in the grid connected mode, while the DC bus voltage is kept stable with the power flow working properly.

[1]  K. T. Tan,et al.  Control and Operation of a DC Grid-Based Wind Power Generation System in a Microgrid , 2016, IEEE Transactions on Energy Conversion.

[2]  T. Wang,et al.  Power balance control for switched reluctance generator integrated in DC microgrid , 2015, 2015 International Conference on Advanced Mechatronic Systems (ICAMechS).

[3]  Eneko Unamuno,et al.  Hybrid ac/dc microgrids—Part I: Review and classification of topologies , 2015 .

[4]  Josep M. Guerrero,et al.  Advanced Control Architectures for Intelligent Microgrids—Part I: Decentralized and Hierarchical Control , 2013, IEEE Transactions on Industrial Electronics.

[5]  Yunjie Gu,et al.  Mode-Adaptive Decentralized Control for Renewable DC Microgrid With Enhanced Reliability and Flexibility , 2014, IEEE Transactions on Power Electronics.

[6]  I. Boldea Switched Reluctance Generators and Their Control , 2015 .

[7]  Chang-Ming Liaw,et al.  A Switched-Reluctance Generator With Interleaved Interface DC–DC Converter , 2015, IEEE Transactions on Energy Conversion.

[8]  Dong Chen,et al.  Control and Operation of a DC Microgrid With Variable Generation and Energy Storage , 2011, IEEE Transactions on Power Delivery.

[9]  Graeme Burt,et al.  Validation of fast and selective protection scheme for an LVDC distribution network , 2017 .

[10]  Juan C. Vasquez,et al.  Hierarchical Control of Droop-Controlled AC and DC Microgrids—A General Approach Toward Standardization , 2009, IEEE Transactions on Industrial Electronics.

[11]  Dong Wang,et al.  A novel protection scheme for an LVDC distribution network with reduced fault levels , 2017, 2017 IEEE Second International Conference on DC Microgrids (ICDCM).

[12]  Ernesto Ruppert Filho,et al.  Design of Computational Experiment for Performance Optimization of a Switched Reluctance Generator in Wind Systems , 2018, IEEE Transactions on Energy Conversion.

[13]  Reza Iravani,et al.  Voltage-Sourced Converters in Power Systems: Modeling, Control, and Applications , 2010 .

[14]  Chang-Ming Liaw,et al.  Establishment of a Switched-Reluctance Generator-Based Common DC Microgrid System , 2011, IEEE Transactions on Power Electronics.

[15]  Kenneth J. Christensen,et al.  DC Local Power Distribution: Technology, Deployment, and Pathways to Success , 2016, IEEE Electrification Magazine.

[16]  Amin Khodaei,et al.  Hybrid AC/DC microgrid planning , 2017 .

[17]  F. Blaabjerg,et al.  Direct torque control of sensorless induction motor drives: a sliding-mode approach , 2004, IEEE Transactions on Industry Applications.

[18]  Paulo Sergio Nascimento Filho,et al.  An Approach for Switched Reluctance Generator in a Wind Generation System With a Wide Range of Operation Speed , 2017, IEEE Transactions on Power Electronics.

[19]  Li Wang,et al.  Integration of Wind Power and Wave Power Generation Systems Using a DC Microgrid , 2015, IEEE Transactions on Industry Applications.

[20]  Arindam Ghosh,et al.  DC Microgrid Technology: System Architectures, AC Grid Interfaces, Grounding Schemes, Power Quality, Communication Networks, Applications, and Standardizations Aspects , 2017, IEEE Access.

[21]  J. Clare,et al.  Control of a switched reluctance generator for variable-speed wind energy applications , 2005, IEEE Transactions on Energy Conversion.

[22]  Vassilios G. Agelidis,et al.  Unified Distributed Control for DC Microgrid Operating Modes , 2016, IEEE Transactions on Power Systems.