MICROGRID AND DISTRIBUTED ENERGY RESOURCES

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This research topic aims to develop microgrid solutions for integrating renewable energy resources into modern distribution networks and promote multi-energy (electric and thermal) systems.

Covering the whole spectrum of the microgrid research, we have been developing high-performance controllers, robust operation methods, and multi-stage coordinated planning frameworks for the microgrid. Supported by NTU’s two flagship microgrid demonstration projects “Renewable Energy Integration Demonstrator – Singapore (REIDS)” in Semakau Island and “Smart Multi-Energy System (SMES)” in Jurong Port, our group is focusing on decentralized and distributed control for plug-and-play, robust optimization against uncertainty, multi-timescale coordination of different distributed resources, and hardware-in-the-loop (HiL) experimental tests. Besides, our developed methods have also been extended to “mobile” microgrids (in contrast to land-based microgrids), such as more-electric aircrafts and all-electric-ships.

This research work has been funded by Australia-Indonesia Centre (AIC), Macau Electric Company (CEM), National Research Foundation (NRF) of Singapore, Energy Market Authority (EMA) of Singapore, Rolls-Royce-NTU Corp Lab, Energy Research Institute @ NTU (ERI@N).

Selected publications in this topic:

  1. Z. Li, Y. Xu*, S. Fang, X. Zheng, and X. Feng, “Robust Coordination of A Hybrid AC/DC Multi-Energy Ship Microgrid with Flexible Voyage and Thermal Loads,” IEEE Trans. Smart Grid, 2019.
  2. Q. Xu, T. Zhao, Y. Xu*, Z. Xu, P. Wang, and F. Blaabjerg, “A Distributed and Robust Energy Management System for Networked Hybrid AC/DC Microgrids,” IEEE Trans. Smart Grid, 2019.
  3. S. Sharma, A. Verma, Y. Xu*, and B.K. Panigrahi, “Robustly Coordinated Bi-level Energy Management of a Multi-Energy Building under Multiple Uncertainties,” IEEE Trans. Sustainable Energy, 2019.
  4. Z. Li, Y. Xu*, S. Fang, Y. Wang, and X. Zheng, “Multi-objective Coordinated Energy Dispatch and Voyage Scheduling for a Multi-energy Ship Microgrid,” IEEE Trans. Industry Applications, 2019.
  5. Y. Wang, T. Zhao, C. Ju, Y. Xu*, and P. Wang, “Two-Level Distributed Volt/Var Control using Aggregated PV Inverters in Distribution Networks,” IEEE Trans. Power Del., 2019.
  6. Y. Wang, M.H. Syed, E. Guillo-Sansano, Y. Xu*, and G.M. Burt, “Inverter-based Voltage Control of Distribution Networks: A Three-Level Coordinated Method and Power Hardware-in-the-Loop Validation,” IEEE Trans. Sustainable Energy, 2019.
  7. C. Zhang, Y. Xu*, et al, “Robustly Coordinated Operation of a Multi-Energy Micro-Grid in Grid-Connected and Islanded Modes under Uncertainties,” IEEE Trans. Sustainable Energy, 2019.
  8. Z. Li and Y. Xu*, “Temporally-Coordinated Optimal Operation of a Multi-energy Microgrid under Diverse Uncertainties,” Applied Energy, 2019.
  9. Y. Wang, Y. Xu, and Y. Tang, “Distributed Aggregation Control of Grid-Interactive Smart Buildings for Power System Frequency Support,” Applied Energy, 2019.
  10. S. Sharma, Y. Xu*, et al, “Time-Coordinated Multi-Energy Management of Smart Buildings under Uncertainties,” IEEE Trans. Industrial Informatics, 2019.
  11. Y. Chen, Y. Xu*, et al, “Optimally Coordinated Dispatch of Combined-Heat-and-Electrical Network,” IET Gen. Trans. & Dist., 2019.
  12. S. Fang, Y. Xu*, et al, “Two-Step Multi-Objective Management of Hybrid Energy Storage System in All-Electric Ship Microgrids,” IEEE Trans. Vehicular Technology, 2019.
  13. Y. Wang, Y. Tang, Y. Xu*, et al, “A Distributed Control Scheme of Thermostatically Controlled Loads for Building-Microgrid Community,” IEEE Trans. Sustainable Energy, 2019.
  14. R. Xu, C. Zhang, Y. Xu*, et al, “Rolling Horizon Based Multi-Objective Robust Voltage/VAR Regulation with Conservation Voltage Reduction in High PV-Penetrated Distribution Networks,” IET Gen. Trans. & Dist., 2019.
  15. Y. Xu*, et al, “Multi-timescale coordinated voltage/var control of high renewable-penetrated distribution networks,” IEEE Trans. Power Syst., 2018.
  16. Y. Wang, Y. Xu*, et al, “Decentralized-Distributed Hybrid Voltage Regulation of Power Distribution Networks Based on Power Inverters,” IET Gen. Trans. & Dist., 2018.
  17. Y. Wang, Y. Xu*, et al, “Aggregated Energy Storage for Power System Frequency Control: A Finite-Time Consensus Approach,” IEEE Trans. Smart Grid, 2018.
  18. B.S.H. Chew, Y. Xu* et al, “Voltage Balancing for Bipolar DC Distribution Grids: A Power Flow based Binary Integer Multi-Objective Optimization Approach,” IEEE Trans. Power Systems, 2018.
  19. Z. Li and Y. Xu*, “Optimal coordinated energy dispatch for a multi-energy microgrid in grid-connected and islanded modes,” Applied Energy, 2018. – Web-of-Science Highly Cited Paper
  20. S. Fang and Y. Xu*, “Multi-objective coordinated scheduling of energy and flight of hybrid electric unmanned aircrafts,” IEEE Trans. Industrial Electronics, 2018.
  21. C. Zhang, Y. Xu*, et al, “Probability-Weighted Robust Optimization for Distributed Generation Planning in Microgrids,” IEEE Trans. Power Syst., 2018.
  22. C. Zhang, Y. Xu*, et al, “Robustly Coordinated Operation of A Multi-Energy Microgrid with Flexible Electric and Thermal Loads,” IEEE Trans. Smart Grid, 2018.
  23. C. Zhang, Y. Xu*, et al “Three-Stage Robust Inverter-Based Voltage/Var Control for Distribution Networks with High PV,” IEEE Trans. Smart Grid, 2017. – Web-of-Science Highly Cited Paper
  24. C. Zhang, Y. Xu*, et al, “Robust operation of Microgrids via two-stage coordinated energy storage and direct load control,” IEEE Trans. Power Syst., 2017.
  25. C. Zhang, Y. Xu, et al, “Robust Coordination of Distributed Generation and Price-Based Demand Response in Microgrids,” IEEE Trans. Smart Grid, 2017. – Web-of-Science Highly Cited Paper
  26. W. Zhang, Y. Xu*, et al, “Robust SCOPF using multiple microgrids for corrective control under uncertainty,” IEEE Trans. Industrial Informatics, 2017.
  27. C. Li, Y. Xu, et al, “Risk-Averse Energy Trading in Multi-Energy Microgrids: A Two-stage Stochastic Game Approach,” IEEE Trans. Industrial Informatics, 2017.
  28. J. Li, C. Li, Y. Xu, et al, “Noncooperative game-based distributed charging control for plug-in electric vehicles in distribution networks,” IEEE Trans. Industrial Informatics, 2017.
  29. C. Ju, P. Wang, L. Goel, and Y. Xu*, “A two-layer energy management system for microgrids with hybrid energy storage considering degradation costs,” IEEE Trans. Smart Grid, 2017.
  30. Y. Zheng, Z.Y. Dong, Y. Xu, et al, “Electric vehicle battery charging/swap stations in distribution systems: comparison study and optimal planning,” IEEE Trans. Power Systems, 2014. – Web-of-Science Highly Cited Paper
  31. Y. Xu, Z.Y. Dong, et al, “Optimal capacitor placement to distribution transformers for power loss reduction in radial distribution systems,” IEEE Trans. Power Systems, 2013.