Resilience Analysis of DC Microgrids Under Denial of Service Threats

Liu, Jianzhe; Liu, Xiaonan; Wang, Jianhui

doi:10.1109/tpwrs.2019.2897499

Cited by 66 publications

(22 citation statements)

References 53 publications

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“…), including clear information about where the data resides and how it is exchanged between various components of the microgrid and the utility grid [33] [34]. Cyber-resilience, on the other hand, refers to the ability of the energy system to maintain its operation in the event of a threat, and if impacted, the ability to quickly recover after the event has passed [28] [30]. Generally, cybersecurity's central focus is vulnerability reduction.…”

Section: Figure 1 Process Of Building a Resilient Microgridmentioning

confidence: 99%

Microgrid resilience: A holistic approach for assessing threats, identifying vulnerabilities, and designing corresponding mitigation strategies

et al. 2020

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Microgrids are being increasing deployed to improve the operational flexibility, resilience, coordinated-energy management capabilities, self-adequacy, and increased reliability of power systems. This strong market growth is also driven by advances in power electronics, improved control systems, and the rapidly falling price and increased adoption of distributed energy generation technologies, like solar photovoltaics and storage. In the event of grid outages, microgrids can provide a backup source of power; providing resilience to the critical loads; however, this requires that the microgrid itself is resilient to physical and cyber threats. Building highly resilient microgrids requires a methodological assessment of potential threats, identification of vulnerabilities, and design of mitigation strategies. This paper provides a comprehensive review of threats, vulnerabilities, and mitigation strategies and develops a definition for microgrid resilience. The paper also develops a methodology for designing resilient microgrids by considering how microgrid designers and site owners evaluate threats, vulnerabilities, and consequences and choose the microgrid features required to address these threats under different situations.

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Section: Figure 1 Process Of Building a Resilient Microgridmentioning

confidence: 99%

Microgrid resilience: A holistic approach for assessing threats, identifying vulnerabilities, and designing corresponding mitigation strategies

et al. 2020

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“…Once a vulnerability of system was discovered, the system can be intruded by the DoS attack, which caused a (Direct current) DC microgrid to enter an unsafe state. A framework was proposed to study the fault ridethrough capability of DC microgrids in DoS attacks [81]. In the last, two simulation case studies showed the effectiveness of that framework.…”

Section: ) Denial-of-service Attacksmentioning

confidence: 99%

A Survey of Network Attacks on Cyber-Physical Systems

et al. 2020

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A cyber-physical system (CPS) typically consists of the plant, sensors, actuators, the controller and a communication network. The communication network connects the individual components to achieve the computing and communication in the CPS. It also makes the CPS vulnerable to network attacks. How to deal with the network attacks in CPSs has become a research hotspot. This paper surveys the types of network attacks in CPSs, the intrusion detection methods and the attack defense strategies. The future research directions of CPSs network security are also presented.INDEX TERMS Cyber-physical systems, network attacks, intrusion detection, defense strategies.

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“…In [24], a resiliencedriven robust dispatching model is developed to obtain the robust plans in the worst scenario for a hybrid MG with the consideration of uncertain event occurrence time. In [25], a resilience analysis framework is put forward to study the fault ride-through capability of a DC MG against unknown cyber attacks. Note that these models on AC/DC hybrid MGs consider only power balance equations to control power flows.…”

Section: Ac(dc) Side Variables ∆Ementioning

confidence: 99%

“…Similar to AC subgrid, the constraints relating to DC subgrid can be found hereafter. The active power balance equation at each bus b are shown in (24) and (25). Equations (26), (27) and (28) represent the the operational constraints regarding voltage limits, line capacities and the power generation limit of conventional generators, while constraints (29)-(33) corresponds to the BESS unit in DC subgrid.…”

Section: A Resilience Operation Modementioning

confidence: 99%

Resilience-Driven Modeling, Operation and Assessment for a Hybrid AC/DC Microgrid

2020

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High-impact and low-probability extreme events can cause severe damage to power systems, especially for distribution systems. Microgrids (MGs) with distributed generation resources provide a viable solution for local load survivability via islanding schemes during extreme events. Recently, much research has focused on resilience-driven modeling and operations of MGs. In this paper, a resiliencedriven operational model incorporating two operational modes (grid-connected and islanded) and detailed technical characteristics, such as voltage-related operational constraints, is developed for the resilience enhancement of a hybrid AC/DC MG. A detailed AC optimal power flow (OPF) algorithm is employed to model operational constraints and the power exchange between AC and DC subgrids. Preventive power importing is utilized for better preparedness before extreme events and demand response is employed to reduce load shedding during emergency mode. Existing literature on resilience assessment is reviewed and a modified multi-phase curve is proposed to fully represent the influence of limited generation resources and uncertain event duration on resilience. Extensive case studies capturing the distinction of critical loads and non-critical loads and two types of contingencies (multiple line faults and interrupted connection between AC subgrid and DC subgrid) are conducted to demonstrate the effectiveness of the proposed resilience strategy on protecting critical loads and reducing total load shedding. Particularly, a sensitivity analysis considering different event occurrence time has been simulated to capture, in a simple but rather effective way, the effect of the uncertainty surrounding event occurrence.

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Resilience Analysis of DC Microgrids Under Denial of Service Threats

Cited by 66 publications

References 53 publications

Microgrid resilience: A holistic approach for assessing threats, identifying vulnerabilities, and designing corresponding mitigation strategies

Microgrid resilience: A holistic approach for assessing threats, identifying vulnerabilities, and designing corresponding mitigation strategies

A Survey of Network Attacks on Cyber-Physical Systems

Resilience-Driven Modeling, Operation and Assessment for a Hybrid AC/DC Microgrid

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