Time-Delay Stability Analysis for Hybrid Energy Storage System With Hierarchical Control in DC Microgrids

Hybrid energy storage system (HESS) plays an important role in the operation of dc microgrids which have attracted significant research attention recently. The hierarchical control is widely adopted for the coordination of multiple energy storages in a HESS. As the hierarchical control comprises the centralized and the decentralized control levels, the time delays during signal transfer processes between two control levels may significantly affect HESS operation and may lead to instability. In this paper, considering the multiple delays in the hierarchical control processes, the maximum delayed time (MDT) is defined to assess the stability margin for a HESS. An accurate and effective method based on small signal stability model is then proposed to determine the MDT of a HESS to maintain its stability. The effectiveness and correctness of the proposed method are verified using a lab-scale dc microgrid.

[1]  Juan C. Vasquez,et al.  Modeling and Sensitivity Study of Consensus Algorithm-Based Distributed Hierarchical Control for DC Microgrids , 2016, IEEE Transactions on Smart Grid.

[2]  Alireza Khaligh,et al.  A Novel Integrated Magnetic Structure Based DC/DC Converter for Hybrid Battery/Ultracapacitor Energy Storage Systems , 2012, IEEE Transactions on Smart Grid.

[3]  Jiang Tao,et al.  A novel LMI criterion for power system stability with multiple time-delays , 2014 .

[4]  D. V. Senthilkumar,et al.  Dynamics of Nonlinear Time-Delay Systems , 2011 .

[5]  Debapriya Das,et al.  An Enhanced Droop Control Method for Accurate Load Sharing and Voltage Improvement of Isolated and Interconnected DC Microgrids , 2016, IEEE Transactions on Sustainable Energy.

[6]  Xinghuo Yu,et al.  Droop-Based Distributed Cooperative Control for Microgrids With Time-Varying Delays , 2016, IEEE Transactions on Smart Grid.

[7]  G.T. Heydt,et al.  Evaluation of time delay effects to wide-area power system stabilizer design , 2004, IEEE Transactions on Power Systems.

[8]  Andrey Polyakov,et al.  Implicit Lyapunov-Krasovski Functionals for Stability Analysis and Control Design of Time-Delay Systems , 2015, IEEE Transactions on Automatic Control.

[9]  Yongli Li,et al.  An Active Damping Method Based on a Supercapacitor Energy Storage System to Overcome the Destabilizing Effect of Instantaneous Constant Power Loads in DC Microgrids , 2017, IEEE Transactions on Energy Conversion.

[10]  Chika O. Nwankpa,et al.  An Exact Method for Computing Delay Margin for Stability of Load Frequency Control Systems With Constant Communication Delays , 2016, IEEE Transactions on Power Systems.

[11]  Li Wang,et al.  Small-Signal Stability Analysis of an Autonomous Hybrid Renewable Energy Power Generation/Energy Storage System Part I: Time-Domain Simulations , 2008, IEEE Transactions on Energy Conversion.

[12]  Juan C. Vasquez,et al.  Small-Signal Analysis of the Microgrid Secondary Control Considering a Communication Time Delay , 2016, IEEE Transactions on Industrial Electronics.

[13]  N. L. Narasamma,et al.  Design and Analysis of Novel Control Strategy for Battery and Supercapacitor Storage System , 2014, IEEE Transactions on Sustainable Energy.

[14]  Zhengming Zhao,et al.  Transmission Loss Optimization-Based Optimal Power Flow Strategy by Hierarchical Control for DC Microgrids , 2017, IEEE Transactions on Power Electronics.

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

[16]  K. Gu.  An integral inequality in the stability problem of time-delay systems , 2000, Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187).

[17]  Lalit Goel,et al.  A Two-Layer Energy Management System for Microgrids With Hybrid Energy Storage Considering Degradation Costs , 2018, IEEE Transactions on Smart Grid.

[18]  Peng Wang,et al.  Hierarchical Control of Hybrid Energy Storage System in DC Microgrids , 2015, IEEE Transactions on Industrial Electronics.

[19]  Juan C. Vasquez,et al.  Stability Enhancement Based on Virtual Impedance for DC Microgrids With Constant Power Loads , 2015, IEEE Transactions on Smart Grid.

[20]  Yi Tang,et al.  Implementation of Hierarchical Control in DC Microgrids , 2014, IEEE Transactions on Industrial Electronics.

[21]  Yong He,et al.  Delay-dependent stability criteria for linear systems with multiple time delays , 2006 .

[22]  Hongjie Jia,et al.  A Simple Approach to Determine Power System Delay Margin , 2007, 2007 IEEE Power Engineering Society General Meeting.

[23]  Josep M. Guerrero,et al.  Multiagent System-Based Distributed Coordinated Control for Radial DC Microgrid Considering Transmission Time Delays , 2017, IEEE Transactions on Smart Grid.

[24]  Jianhui Wang,et al.  Optimal Operation Mode Selection for a DC Microgrid , 2016, IEEE Transactions on Smart Grid.

[25]  Yunjie Gu,et al.  Frequency-Coordinating Virtual Impedance for Autonomous Power Management of DC Microgrid , 2015, IEEE Transactions on Power Electronics.

[26]  Changyun Wen,et al.  A Decentralized Dynamic Power Sharing Strategy for Hybrid Energy Storage System in Autonomous DC Microgrid , 2017, IEEE Transactions on Industrial Electronics.

[27]  Vassilios G. Agelidis,et al.  Cooperative Multi-Agent Control of Heterogeneous Storage Devices Distributed in a DC Microgrid , 2016, IEEE Transactions on Power Systems.