Load Sharing Improvement for Parallel-Connected Distributed Generation Inverters Using Gain Regulator Design

This paper presents a simple, effective control strategy applied to parallel- connected of single- phase voltage source inverters of distributed generations. This strategy is based on changing the gains of the controller that controls the output voltage of the inverter. With this approach, the output current of the inverter is change when the load dynamics or line impedance is change. The effectiveness of the proposed strategy is confirmed through simulation results.

[1]  Yun Wei Li,et al.  An Enhanced Microgrid Load Demand Sharing Strategy , 2012, IEEE Transactions on Power Electronics.

[2]  Arindam Ghosh,et al.  Improvement of Stability and Load Sharing in an Autonomous Microgrid Using Supplementary Droop Control Loop , 2010, IEEE Transactions on Power Systems.

[3]  Po-Tai Cheng,et al.  Control strategies for distributed energy resources interface converters in the low voltage Microgrid , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[4]  Po-Tai Cheng,et al.  A new droop control method for the autonomous operation of distributed energy resource interface converters , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[5]  Charles Sao,et al.  Control and Power Management of Converter Fed Microgrids , 2008 .

[6]  Felix A. Farret,et al.  Integration of alternative sources of energy , 2006 .

[7]  Prasad N. Enjeti,et al.  Design of a wide input range DC-DC converter with a robust power control scheme suitable for fuel cell power conversion , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[8]  Soon-Ryul Nam,et al.  Power-Sharing Method of Multiple Distributed Generators Considering Control Modes and Configurations of a Microgrid , 2010, IEEE Transactions on Power Delivery.

[9]  Tsai-Fu Wu,et al.  3C strategy for inverters in parallel operation achieving an equal current distribution , 2000, IEEE Trans. Ind. Electron..

[10]  Qing-Chang Zhong,et al.  Robust Droop Controller for Accurate Proportional Load Sharing Among Inverters Operated in Parallel , 2013, IEEE Transactions on Industrial Electronics.

[11]  Robert H. Lasseter.  Microgrids and Distributed Generation , 2007 .

[12]  A. Keyhani,et al.  Control of a Fuel Cell Based Z-Source Converter , 2007, IEEE Transactions on Energy Conversion.

[13]  Yan Li,et al.  Power Management of Inverter Interfaced Autonomous Microgrid Based on Virtual Frequency-Voltage Frame , 2011, IEEE Transactions on Smart Grid.

[14]  T.C. Green,et al.  Modeling, Analysis and Testing of Autonomous Operation of an Inverter-Based Microgrid , 2007, IEEE Transactions on Power Electronics.

[15]  Arindam Ghosh,et al.  Enhancing the Stability of an Autonomous Microgrid Using DSTATCOM , 2008 .

[16]  J. Miret,et al.  A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems , 2004, IEEE Transactions on Power Electronics.

[17]  Hans B. Puttgen,et al.  Distributed generation: Semantic hype or the dawn of a new era? , 2003 .