Visible to the public A Moving Target Approach for Securing Secondary Frequency Control in Microgrids

TitleA Moving Target Approach for Securing Secondary Frequency Control in Microgrids
Publication TypeConference Paper
Year of Publication2020
AuthorsLiu, S., Kosuru, R., Mugombozi, C. F.
Conference Name2020 IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)
Date Publishedaug
Keywordscommunication links, compositionality, computer network security, Conferences, control systems, cyber attack, cyber attack threats, Cyber Dependencies, decision making, denial of service, denial of service attack, distributed power generation, DoS attacks, frequency control, human factors, inverter-based DG, Inverters, invertors, Load modeling, Markov process, Markov processes, Metrics, microgrid control systems, microgrid secondary frequency control, Microgrids, moving target, moving target approach, power engineering computing, power generation control, power generation scheduling, power system security, pubcrawl, reactive defense approaches, Resiliency, Scalability, secondary control, sensor data, small-signal model
AbstractMicrogrids' dependency on communication links exposes the control systems to cyber attack threats. In this work, instead of designing reactive defense approaches, a proacitve moving target defense mechanism is proposed for securing microgrid secondary frequency control from denial of service (DoS) attack. The sensor data is transmitted by following a Markov process, not in a deterministic way. This uncertainty will increase the difficulty for attacker's decision making and thus significantly reduce the attack space. As the system parameters are constantly changing, a gain scheduling based secondary frequency controller is designed to sustain the system performance. Case studies of a microgrid with four inverter-based DGs show the proposed moving target mechanism can enhance the resiliency of the microgrid control systems against DoS attacks.
Citation Keyliu_moving_2020