Decentralized Adaptive Energy-Shaping for Integrated Voltage Regulation With Large-Signal Stability in DC Microgrids

Authors

Ningyi Liang, Donghui Li, Yifeng Wang, Xiaoyong Ma, Jian Zhou, Long Tao

Abstract

Maintaining bus voltage stability is a central challenge in dc microgrids (MGs). This article introduces a decentralized adaptive energy-shaping approach (DEC) that seamlessly merges constant voltage and droop mode (DM) controls, ensuring the comprehensive large-signal stability of the MG. Central to the DEC’s architecture is its stratification of the MG into autonomous distributed unit (DU) subsystems. Using a nonlinear observer, this strategy effectively recognizes the electrical interactions among individual DU subsystems, obviating auxiliary output current sensors. This structured approach breaks down the intricate stability challenges of the MG into more manageable sections. These sections are carefully designed to address estimated couplings and reinforce each DU subsystem’s resilience. The introduced stabilization method, inspired by the passivity-based port-controlled Hamiltonian (pcH) system theory, adopts a passive control damping mechanism coupled with a dynamically adjusted interconnection coefficient. This ensures a smooth stability of DU subsystems, even when faced with significant disturbances. Rigorous theoretical analyses, underpinned by the Lyapunov theorem, corroborate the systemic stability conferred by the DEC design. Furthermore, it demonstrates robustness against unforeseen input voltage variations. Simulations and experiments demonstrate that the proposed control approach accelerates system recovery and broadens the stability margin.

Citation

• Journal: IEEE Journal of Emerging and Selected Topics in Power Electronics
• Year: 2024
• Volume: 12
• Issue: 4
• Pages: 4025–4037
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• DOI: 10.1109/jestpe.2024.3420397

BibTeX

@article{Liang_2024,
  title={{Decentralized Adaptive Energy-Shaping for Integrated Voltage Regulation With Large-Signal Stability in DC Microgrids}},
  volume={12},
  ISSN={2168-6785},
  DOI={10.1109/jestpe.2024.3420397},
  number={4},
  journal={IEEE Journal of Emerging and Selected Topics in Power Electronics},
  publisher={Institute of Electrical and Electronics Engineers (IEEE)},
  author={Liang, Ningyi and Li, Donghui and Wang, Yifeng and Ma, Xiaoyong and Zhou, Jian and Tao, Long},
  year={2024},
  pages={4025--4037}
}

Download the bib file

References

• Baidya S, Nandi C (2022) A comprehensive review on DC Microgrid protection schemes. Electric Power Systems Research 210:108051. https://doi.org/10.1016/j.epsr.2022.10805 – 10.1016/j.epsr.2022.108051
• Lin P, Zhang C, Wang P, Xiao J (2019) A Decentralized Composite Controller for Unified Voltage Control With Global System Large-Signal Stability in DC Microgrids. IEEE Trans Smart Grid 10(5):5075–5091. https://doi.org/10.1109/tsg.2018.287516 – 10.1109/tsg.2018.2875165
• Dragicevic T, Lu X, Vasquez J, Guerrero J (2015) DC Microgrids–Part I: A Review of Control Strategies and Stabilization Techniques. IEEE Trans Power Electron :1–1. https://doi.org/10.1109/tpel.2015.247885 – 10.1109/tpel.2015.2478859
• Dragicevic T, Lu X, Vasquez JC, Guerrero JM (2016) DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues. IEEE Trans Power Electron 31(5):3528–3549. https://doi.org/10.1109/tpel.2015.246427 – 10.1109/tpel.2015.2464277
• Nguyen D-L, Lee H-H (2022) A survey on cooperative control strategies for DC microgrids. Neurocomputing 486:225–236. https://doi.org/10.1016/j.neucom.2021.11.03 – 10.1016/j.neucom.2021.11.036
• Gui Y, Han R, M. Guerrero J, C. Vasquez J, Wei B, Kim W (2021) Large-Signal Stability Improvement of DC-DC Converters in DC Microgrid. IEEE Trans Energy Convers 36(3):2534–2544. https://doi.org/10.1109/tec.2021.305713 – 10.1109/tec.2021.3057130
• Gao F, Bozhko S, Costabeber A, Patel C, Wheeler P, Hill CI, Asher G (2017) Comparative Stability Analysis of Droop Control Approaches in Voltage-Source-Converter-Based DC Microgrids. IEEE Trans Power Electron 32(3):2395–2415. https://doi.org/10.1109/tpel.2016.256778 – 10.1109/tpel.2016.2567780
• Li P, Guo L, Li X, Wang H, Zhu L, Gao F, Zhu J, Wang C (2021) Reduced-Order Modeling and Comparative Dynamic Analysis of DC Voltage Control in DC Microgrids Under Different Droop Methods. IEEE Trans Energy Convers 36(4):3317–3333. https://doi.org/10.1109/tec.2021.307643 – 10.1109/tec.2021.3076438
• Xie W, Han M, Cao W, Guerrero JM, Vasquez JC (2021) System-Level Large-Signal Stability Analysis of Droop-Controlled DC Microgrids. IEEE Trans Power Electron 36(4):4224–4236. https://doi.org/10.1109/tpel.2020.301931 – 10.1109/tpel.2020.3019311
• Liu J, Lu X, Wang J (2019) Resilience Analysis of DC Microgrids Under Denial of Service Threats. IEEE Trans Power Syst 34(4):3199–3208. https://doi.org/10.1109/tpwrs.2019.289749 – 10.1109/tpwrs.2019.2897499
• Cespedes M, Xing L, Sun J (2011) Constant-Power Load System Stabilization by Passive Damping. IEEE Trans Power Electron 26(7):1832–1836. https://doi.org/10.1109/tpel.2011.215188 – 10.1109/tpel.2011.2151880
• WU M, LU DD-C (2014) Active stabilization methods of electric power systems with constant power loads: a review. J Mod Power Syst Clean Energy 2(3):233–243. https://doi.org/10.1007/s40565-014-0066- – 10.1007/s40565-014-0066-y
• Jeung Y-C, Lee D-C, Dragicevic T, Blaabjerg F (2021) Design of Passivity-Based Damping Controller for Suppressing Power Oscillations in DC Microgrids. IEEE Trans Power Electron 36(4):4016–4028. https://doi.org/10.1109/tpel.2020.302471 – 10.1109/tpel.2020.3024716
• Lenz E, Pagano DJ (2013) Nonlinear Control for Bidirectional Power Converter in a dc Microgrid. IFAC Proceedings Volumes 46(23):359–364. https://doi.org/10.3182/20130904-3-fr-2041.0012 – 10.3182/20130904-3-fr-2041.00121
• Hassan M, Su C-L, Chen F-Z, Lo K-Y (2022) Adaptive Passivity-Based Control of a DC–DC Boost Power Converter Supplying Constant Power and Constant Voltage Loads. IEEE Trans Ind Electron 69(6):6204–6214. https://doi.org/10.1109/tie.2021.308672 – 10.1109/tie.2021.3086723
• Ding S, Zheng WX, Sun J, Wang J (2018) Second-Order Sliding-Mode Controller Design and Its Implementation for Buck Converters. IEEE Trans Ind Inf 14(5):1990–2000. https://doi.org/10.1109/tii.2017.275826 – 10.1109/tii.2017.2758263
• Cao Z, Wen H, Bu Q, Shi H, Xu P, Yang Y, Du Y (2024) Constant Power Load Stabilization With Fast Transient Boundary Control for DAB-Converters-Based Electric Drive Systems. IEEE Trans Ind Electron 71(2):1863–1874. https://doi.org/10.1109/tie.2023.325394 – 10.1109/tie.2023.3253947
• He J, Zhang X (2020) An Ellipse-Optimized Composite Backstepping Control Strategy for a Point-of-Load Inverter Under Load Disturbance in the Shipboard Power System. IEEE Open J Power Electron 1:420–430. https://doi.org/10.1109/ojpel.2020.301694 – 10.1109/ojpel.2020.3016942
• Karami Z, Shafiee Q, Sahoo S, Yaribeygi M, Bevrani H, Dragicevic T (2021) Hybrid Model Predictive Control of DC–DC Boost Converters With Constant Power Load. IEEE Trans Energy Convers 36(2):1347–1356. https://doi.org/10.1109/tec.2020.304775 – 10.1109/tec.2020.3047754
• Jiang W, Zhang X, Guo F, Chen J, Wang P, Koh LH (2020) Large-Signal Stability of Interleave Boost Converter System With Constant Power Load Using Sliding-Mode Control. IEEE Trans Ind Electron 67(11):9450–9459. https://doi.org/10.1109/tie.2019.295540 – 10.1109/tie.2019.2955401
• Pang S, Nahid-Mobarakeh B, Pierfederici S, Phattanasak M, Huangfu Y, Luo G, Gao F (2019) Interconnection and Damping Assignment Passivity-Based Control Applied to On-Board DC–DC Power Converter System Supplying Constant Power Load. IEEE Trans on Ind Applicat 55(6):6476–6485. https://doi.org/10.1109/tia.2019.293814 – 10.1109/tia.2019.2938149
• Chen W-H, Yang J, Guo L, Li S (2016) Disturbance-Observer-Based Control and Related Methods—An Overview. IEEE Trans Ind Electron 63(2):1083–1095. https://doi.org/10.1109/tie.2015.247839 – 10.1109/tie.2015.2478397
• Xu Q, Xu Y, Zhang C, Wang P (2020) A Robust Droop-Based Autonomous Controller for Decentralized Power Sharing in DC Microgrid Considering Large-Signal Stability. IEEE Trans Ind Inf 16(3):1483–1494. https://doi.org/10.1109/tii.2019.295020 – 10.1109/tii.2019.2950208
• Khalil, Nonlinear Systems (2002)
• Michel A, Miller R, Wang Tang (1978) Lyapunov stability of interconnected systems: Decomposition into strongly connected subsystems. IEEE Trans Circuits Syst 25(9):799–809. https://doi.org/10.1109/tcs.1978.108453 – 10.1109/tcs.1978.1084537
• Mayo-Maldonado JC, Ruiz-Martinez OF, Escobar G, Maupong TM, Valdez-Resendiz JE, Rosas-Caro JC (2020) Power shaping control of DC–DC converters with constant power loads. Control Engineering Practice 105:104639. https://doi.org/10.1016/j.conengprac.2020.10463 – 10.1016/j.conengprac.2020.104639
• Jeltsema D, Ortega R, M.A. Scherpen J (2004) An energy-balancing perspective of interconnection and damping assignment control of nonlinear systems. Automatica 40(9):1643–1646. https://doi.org/10.1016/j.automatica.2004.04.00 – 10.1016/j.automatica.2004.04.007
• Chen W-H (2004) Disturbance Observer Based Control for Nonlinear Systems. IEEE/ASME Trans Mechatron 9(4):706–710. https://doi.org/10.1109/tmech.2004.83903 – 10.1109/tmech.2004.839034
• van der Schaft A (2017) L2-Gain and Passivity Techniques in Nonlinear Control. Springer International Publishin – 10.1007/978-3-319-49992-5