Hierarchical Cooperative Control for Islanded DC Microgrid Cluster *Note: Sub-titles are not captured in Xplore and should not be used

This paper proposes a hierarchical cooperative control scheme to ensure stable operation of islanded dc microgrid (MG) clusters in high renewable energy sources (RES) penetration scenarios. This scheme can be divided into two levels. In the primary level, a cooperative method based on the local bus voltage information is presented, by which the distribution generators (DGs) and the energy storage system (ESS) in each MG can be coordinated together to regulate the local bus voltage within a certain range. In the secondary level, an adaptive droop method for each MG is introduced to control the power flow of the tie-line among the multiple MGs. Moreover, the reference for the operation of the ESS is automatically adjusted to accommodate the changes of DGs’ droop characteristics, which are caused by the adaptive droop control. The effectiveness of the hierarchical cooperative control scheme for MG clusters is verified by MATLAB/Simulink simulations.

[1]  Juan C. Vasquez,et al.  Hierarchical control for multiple DC-microgrids clusters , 2014, 2014 IEEE 11th International Multi-Conference on Systems, Signals & Devices (SSD14).

[2]  Juan C. Vasquez,et al.  A Distributed Control Strategy for Coordination of an Autonomous LVDC Microgrid Based on Power-Line Signaling , 2014, IEEE Transactions on Industrial Electronics.

[3]  Juan C. Vasquez,et al.  Modeling, stability analysis and active stabilization of multiple DC-microgrid clusters , 2014, 2014 IEEE International Energy Conference (ENERGYCON).

[4]  Zhao Mi.  Characteristic Analysis of Multi-Microgrids and a Pilot Project Design , 2015 .

[5]  ch vijay chandar,et al.  Coordinated Control and Energy Management of Distributed Generation Inverters in a Microgrid , 2016 .

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

[7]  Juan C. Vasquez,et al.  Distributed consensus-based control of multiple DC-microgrids clusters , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.

[8]  Robert Lasseter,et al.  CERTS Microgrid Demonstration With Large-Scale Energy Storage and Renewable Generation , 2014, IEEE Transactions on Smart Grid.

[9]  Hossein Lotfi,et al.  State of the Art in Research on Microgrids: A Review , 2015, IEEE Access.

[10]  T. M. Haileselassie,et al.  Impact of DC Line Voltage Drops on Power Flow of MTDC Using Droop Control , 2012, IEEE Transactions on Power Systems.

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

[12]  Tushar Kanti Roy,et al.  Control of islanded DC microgrids using nonlinear adaptive decentralized controllers , 2017, 2017 IEEE Industry Applications Society Annual Meeting.

[13]  Reza Iravani,et al.  Potential-Function Based Control of a Microgrid in Islanded and Grid-Connected Modes , 2010, IEEE Transactions on Power Systems.

[14]  Lexuan Meng,et al.  Hierarchical control with virtual resistance optimization for efficiency enhancement and State-of-Charge balancing in DC microgrids , 2015, 2015 IEEE First International Conference on DC Microgrids (ICDCM).

[15]  Yang Xinf.  Overview on Micro-grid Technology , 2014 .

[16]  K. T. Tan,et al.  Coordinated Control and Energy Management of Distributed Generation Inverters in a Microgrid , 2013, IEEE Transactions on Power Delivery.

[17]  Michael Z. Q. Chen,et al.  Centralized Control for Parallel Operation of Distributed Generation Inverters in Microgrids , 2012, IEEE Transactions on Smart Grid.