Optimal Decentralized Economical-sharing Scheme in Islanded AC Microgrids with Cascaded Inverters

To address the economical dispatch problem without communications in islanded AC microgrids consisting of cascaded inverters, this paper proposes an optimal decentralized economical-sharing scheme. In proposed scheme, optimal sharing function of the current is applied to generate the reference voltages. And the frequency is used to drive all distributed generators (DGs) synchronize operation in microgrids. When the microgrid is in steady state, DGs share a single common frequency and current in terms of the proposed scheme. Thus the potential advantages of simplicity and decentralized manner are retained. The AC microgrid model has been developed through simulations and experiments to verify the effectiveness and performance of the proposed scheme.

[1]  Javad Mohammadpour,et al.  Accurate reactive power control of autonomous microgrids using an adaptive virtual inductance loop , 2015 .

[2]  Josep M. Guerrero,et al.  An Improved Droop Control Strategy for Reactive Power Sharing in Islanded Microgrid , 2015, IEEE Transactions on Power Electronics.

[3]  Yun Liu,et al.  A Center-Free Control Strategy for the Coordination of Multiple Photovoltaic Generators , 2014, IEEE Transactions on Smart Grid.

[4]  Josep M. Guerrero,et al.  Distributed cooperative synchronization strategy for multi-bus microgrids , 2017 .

[5]  Jian-Xin Xu,et al.  Consensus Based Approach for Economic Dispatch Problem in a Smart Grid , 2013, IEEE Transactions on Power Systems.

[6]  Josep M. Guerrero,et al.  Dynamic Phasors-Based Modeling and Stability Analysis of Droop-Controlled Inverters for Microgrid Applications , 2014, IEEE Transactions on Smart Grid.

[7]  Mariusz Malinowski,et al.  A Survey on Cascaded Multilevel Inverters , 2010, IEEE Transactions on Industrial Electronics.

[8]  Francesco Bullo,et al.  Synchronization and power sharing for droop-controlled inverters in islanded microgrids , 2012, Autom..

[9]  Ahmed Al-Durra,et al.  Multifunctional control strategy for asymmetrical cascaded H-Bridge Inverter in microgrid applications , 2015, 2015 IEEE Industry Applications Society Annual Meeting.

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

[11]  R. Iravani,et al.  Microgrids management , 2008, IEEE Power and Energy Magazine.

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

[13]  Sajad Najafi Ravadanegh,et al.  Optimal Power Dispatch of Multi-Microgrids at Future Smart Distribution Grids , 2015, IEEE Transactions on Smart Grid.

[14]  L. H. Fink,et al.  Understanding automatic generation control , 1992 .

[15]  Frank L. Lewis,et al.  Droop-Free Distributed Control for AC Microgrids , 2016, IEEE Transactions on Power Electronics.

[16]  Ali Elrayyah,et al.  Plug and play nonlinear droop construction scheme to optimize microgrid operations , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[17]  Jin Jiang,et al.  A load-sharing control scheme for a microgrid with a fixed frequency inverter , 2010 .

[18]  Fei Wang,et al.  Grid-Interfacing Converter Systems With Enhanced Voltage Quality for Microgrid Application—Concept and Implementation , 2011, IEEE Transactions on Power Electronics.

[19]  Juan C. Vasquez,et al.  A New Way of Controlling Parallel-Connected Inverters by Using Synchronous-Reference-Frame Virtual Impedance Loop—Part I: Control Principle , 2016, IEEE Transactions on Power Electronics.

[20]  R.H. Lasseter,et al.  Autonomous control of microgrids , 2006, 2006 IEEE Power Engineering Society General Meeting.

[21]  T.C. Green,et al.  Energy Management in Autonomous Microgrid Using Stability-Constrained Droop Control of Inverters , 2008, IEEE Transactions on Power Electronics.

[22]  Po-Tai Cheng,et al.  A new droop control method for the autonomous operation of distributed energy resource interface converters , 2010 .

[23]  Frede Blaabjerg,et al.  Linear Decentralized Power Sharing Schemes for Economic Operation of AC Microgrids , 2016, IEEE Transactions on Industrial Electronics.

[24]  Oriol Gomis-Bellmunt,et al.  Trends in Microgrid Control , 2014, IEEE Transactions on Smart Grid.

[25]  Mo-Yuen Chow,et al.  Convergence Analysis of the Incremental Cost Consensus Algorithm Under Different Communication Network Topologies in a Smart Grid , 2012, IEEE Transactions on Power Systems.

[26]  E.F. El-Saadany,et al.  Adaptive Decentralized Droop Controller to Preserve Power Sharing Stability of Paralleled Inverters in Distributed Generation Microgrids , 2008, IEEE Transactions on Power Electronics.

[27]  Nikos D. Hatziargyriou,et al.  Centralized Control for Optimizing Microgrids Operation , 2008 .

[28]  Seyed Hossein Hosseinian,et al.  Distributed cooperative control system for smart microgrids , 2016 .

[29]  Juan C. Vasquez,et al.  Distributed Secondary Control for Islanded Microgrids—A Novel Approach , 2014, IEEE Transactions on Power Electronics.

[30]  Frank L. Lewis,et al.  Droop-Free Distributed Control for AC Microgrids , 2016 .

[31]  F. Blaabjerg,et al.  Droop Scheme With Consideration of Operating Costs , 2014, IEEE Transactions on Power Electronics.

[32]  Juan C. Vasquez,et al.  Secondary Frequency and Voltage Control of Islanded Microgrids via Distributed Averaging , 2015, IEEE Transactions on Industrial Electronics.

[33]  Raghavendra Reddy Karasani,et al.  A Three-Phase Hybrid Cascaded Modular Multilevel Inverter for Renewable Energy Environment , 2017, IEEE Transactions on Power Electronics.

[34]  Josep M. Guerrero,et al.  Control of Distributed Uninterruptible Power Supply Systems , 2008, IEEE Transactions on Industrial Electronics.

[35]  Fernando Briz,et al.  An improved control scheme based in droop characteristic for microgrid converters , 2010 .

[36]  Ali Mehrizi-Sani,et al.  Distributed Control Techniques in Microgrids , 2014, IEEE Transactions on Smart Grid.