Electronic power transformer to secure the power supply of a mission critical microgrid

The increasing penetration of distributed renewable energy resources and increasing in participation of demand response from consumers make the microgrid become a favorable option for future power system development. Since some loads are mission critical and require 24/7 uninterruptable supply, a smart microgrid is expected as an effective architecture to serve this purpose. This paper proposes the application of electronic power transformer (EPT) to improve the controllability and reliability of a mission critical microgrid. The application scenarios of EPT in the microgrids are analyzed in detailed. Some case studies including applying the EPTs into a grid connected microgrid, among autonomous microgrids, and between two microgrids are analyzed. The simulation results demonstrate the potential of the EPT in enhancing the controllability and reliability of the microgrid.

[1]  Pravin Varaiya,et al.  Smart Operation of Smart Grid: Risk-Limiting Dispatch , 2011, Proceedings of the IEEE.

[2]  A Q Huang,et al.  The Future Renewable Electric Energy Delivery and Management (FREEDM) System: The Energy Internet , 2011, Proceedings of the IEEE.

[3]  Alex Q. Huang,et al.  Voltage and Power Balance Control for a Cascaded H-Bridge Converter-Based Solid-State Transformer , 2013, IEEE Transactions on Power Electronics.

[4]  Yasser Abdel-Rady I. Mohamed,et al.  Optimum Microgrid Design for Enhancing Reliability and Supply-Security , 2013, IEEE Transactions on Smart Grid.

[5]  Chengxiong Mao,et al.  Auto-balancing transformer based on power electronics , 2010 .

[6]  Prasad Enjeti,et al.  Analysis and design of electronic transformers for electric power distribution system , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[7]  R. Ayyanar,et al.  A DC–DC Multiport-Converter-Based Solid-State Transformer Integrating Distributed Generation and Storage , 2013, IEEE Transactions on Power Electronics.

[8]  Michael G. Rosenfield,et al.  The smart grid and key research technical challenges , 2010, 2010 Symposium on VLSI Technology.

[9]  James L Brooks,et al.  Solid State Transformer Concept Development. , 1980 .

[10]  Shu Fan,et al.  Theory and application of distribution electronic power transformer , 2007 .

[11]  S. D. Sudhoff,et al.  A Power Electronic-Based Distribution Transformer , 2002, IEEE Power Engineering Review.

[12]  John D. McDonald.  Microgrids beyond the hype: Utilities need to see a benefit [Technology Leaders] , 2014 .

[13]  Chengxiong Mao,et al.  Operation and control mode of electronic power transformer , 2009, 2009 IEEE PES/IAS Conference on Sustainable Alternative Energy (SAE).

[14]  M. Shahidehpour,et al.  Microgrid-Based Co-Optimization of Generation and Transmission Planning in Power Systems , 2013, IEEE Transactions on Power Systems.

[15]  Chengxiong Mao,et al.  Electronic power transformer with supercapacitors storage energy system , 2009 .

[16]  V. Ramanarayanan,et al.  Control of high-frequency AC link electronic transformer , 2005 .

[17]  Leon M. Tolbert,et al.  Control and protection of power electronics interfaced distributed generation systems in a customer-driven microgrid , 2009, 2009 IEEE Power & Energy Society General Meeting.

[18]  Seyed Hossein Hosseini,et al.  Flexible Power Electronic Transformer , 2010, IEEE Transactions on Power Electronics.