Abstract
With the close integration of cyber and power systems, the consensus-based secondary frequency control in a microgrid is increasingly vulnerable to communication failures such as transmission delays and denial-of-service (DoS) attacks, which can affect the efficiency of frequency recovery in the secondary frequency control. Leveraging the small-signal model, this paper develops a novel cyber-physical system model to analyze the cross-layer effect of DoS attacks on microgrids. In this way, the cross-layer impact on the microgrid from the cyber system to the physical system can be convincingly analyzed. Based on the root approximation method, the tolerant saving time is designed for the microgrid as the index to evaluate the tolerance margin of the time-constrained DoS attack, and then the relationship between the margin and secondary control coefficients is found. A mitigation adaptive secondary control technique is proposed so that the attacked microgrid can dynamically tune the secondary control gain according to the saving time and tolerant saving time (TST). The simulation results show that although the microgrid with high secondary control gain has good dynamic robustness, its TST is low. In addition, the proposed adaptive secondary control system is significantly better than the traditional control system in terms of the stability performance of the microgrid under a DoS attack.
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Kashem S B A, de Souza S, Iqbal A, et al. Microgrid in military applications. In: Proceedings of IEEE 12th International Conference on Compatibility, Power Electronics and Power Engineering, Doha, 2018. 1–5
Sun Q Y, Han R K, Zhang H G, et al. A multiagent-based consensus algorithm for distributed coordinated control of distributed generators in the energy internet. IEEE Trans Smart Grid, 2015, 6: 3006–3019
Du D J, Li X, Li W T, et al. ADMM-based distributed state estimation of smart grid under data deception and denial of service attacks. IEEE Trans Syst Man Cybern Syst, 2019, 49: 1698–1711
Danzi P, Stefanovic C, Meng L, et al. On the impact of wireless jamming on the distributed secondary microgrid control. In: Proceedings of IEEE GlobeCom Workshops (GC Wkshps), Washington, 2016. 1–6
Ye H, Liu K H, Mou Q Y, et al. Modeling and formulation of delayed cyber-physical power system for small-signal stability analysis and control. IEEE Trans Power Syst, 2019, 34: 2419–2432
Wang R, Sun Q Y, Ma D Z, et al. The small-signal stability analysis of the droop-controlled converter in electromagnetic timescale. IEEE Trans Sustain Energy, 2019, 10: 1459–1469
Wang B Y, Sun Q Y, Han R K, et al. Consensus-based secondary frequency control under denial-of-service attacks of distributed generations for microgrids. J Franklin Institute, 2021, 358: 114–130
Long M, Wu C H, Hung J Y. Denial of service attacks on network-based control systems: impact and mitigation. IEEE Trans Ind Inf, 2005, 1: 85–96
Wu J, Chen T W. Design of networked control systems with packet dropouts. IEEE Trans Automat Contr, 2007, 52: 1314–1319
Beg O A, Johnson T T, Davoudi A. Detection of false-data injection attacks in cyber-physical DC microgrids. IEEE Trans Ind Inf, 2017, 13: 2693–2703
Foroush H S, Martinez S. On event-triggered control of linear systems under periodic denial-of-service jamming attacks. In: Proceedings of IEEE 51st Annual Conference on Decision & Control, Maui, 2012. 2551–2556
de Persis C, Tesi P. Input-to-state stabilizing control under denial-of-service. IEEE Trans Automat Contr, 2015, 60: 2930–2944
Liu S C, Hu Z J, Wang X Y, et al. Stochastic stability analysis and control of secondary frequency regulation for islanded microgrids under random denial of service attacks. IEEE Trans Ind Inf, 2019, 15: 4066–4075
Qin J H, Li M L, Shi L, et al. Optimal denial-of-service attack scheduling with energy constraint over packet-dropping networks. IEEE Trans Automat Contr, 2018, 63: 1648–1663
Lu A Y, Yang G H. Input-to-state stabilizing control for cyber-physical systems with multiple transmission channels under denial of service. IEEE Trans Automat Contr, 2018, 63: 1813–1820
Milano F, Anghel M. Impact of time delays on power system stability. IEEE Trans Circuits Syst I, 2012, 59: 889–900
Liu S C, Wang X Y, Liu P X. Impact of communication delays on secondary frequency control in an islanded microgrid. IEEE Trans Ind Electron, 2015, 62: 2021–2031
Dong C Y, Jia H J, Xu Q W, et al. Time-delay stability analysis for hybrid energy storage system with hierarchical control in DC microgrids. IEEE Trans Smart Grid, 2018, 9: 6633–6645
Lou G N, Gu W, Xu Y L, et al. Stability robustness for secondary voltage control in autonomous microgrids with consideration of communication delays. IEEE Trans Power Syst, 2018, 33: 4164–4178
Xu L, Guo Q L, Wang Z G, et al. Modeling of time-delayed distributed cyber-physical power systems for small-signal stability analysis. IEEE Trans Smart Grid, 2021, 12: 3425–3437
Zhou J G, Sun H B, Xu Y L, et al. Distributed power sharing control for islanded single-/three-phase microgrids with admissible voltage and energy storage constraints. IEEE Transactions on Smart Grid, 2021, 14: 2760–2775
Guerrero J M, Vasquez J C, Matas J, et al. Hierarchical control of droop-controlled AC and DC microgrids-a general approach toward standardization. IEEE Trans Ind Electron, 2011, 58: 158–172
Simpson-Porco J W, Dörfler F, Bullo F. Synchronization and power sharing for droop-controlled inverters in islanded microgrids. Automatica, 2013, 49: 2603–2611
Guo F H, Wen C Y, Mao J F, et al. Distributed secondary voltage and frequency restoration control of droop-controlled inverter-based microgrids. IEEE Trans Ind Electron, 2015, 62: 4355–4364
Saadat H. Power System Analysis. Hoboken: Wiley, 2002
Mumtaz F, Syed M H, Hosani M A, et al. A novel approach to solve power flow for islanded microgrids using modified Newton Raphson with droop control of DG. IEEE Trans Sustain Energy, 2016, 7: 493–503
Breda D. Solution operator approximations for characteristic roots of delay differential equations. Appl Numer Math, 2006, 56: 305–317
Wu Y, Guerrero J M, Wu Y P. Distributed coordination control for suppressing circulating current in parallel inverters of islanded microgrid. IET Gener Transm Distrib, 2019, 13: 968–975
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This work was supported by National Key Research and Development Program of China (Grant No. 2018YFA0702200) and National Natural Science Key Foundation of China (Grant No. U20A20190).
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Sun, Q., Wang, B., Feng, X. et al. Small-signal stability and robustness analysis for microgrids under time-constrained DoS attacks and a mitigation adaptive secondary control method. Sci. China Inf. Sci. 65, 162202 (2022). https://doi.org/10.1007/s11432-021-3290-3
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DOI: https://doi.org/10.1007/s11432-021-3290-3