47,056 research outputs found
Cyber Physical Energy Systems Modules for Power Sharing Controllers in Inverter Based Microgrids
The Microgrids (MGs) are an effective way to deal with the smart grid challenges, including service continuity in the event of a grid interruption, and renewable energy integration. The MGs are compounded by multiple distributed generators (DGs), and the main control goals are load demand sharing and voltage and frequency stability. Important research has been reported to cope with the implementation challenges of the MGs including the power sharing control problem, where the use of cybernetic components such as virtual components, and communication systems is a common characteristic. The use of these cybernetic components to control complex physical systems generates new modeling challenges in order to achieve an adequate balance between complexity and accuracy in the MG model. The standardization problem of the cyber-physical MG models is addressed in this work, using a cyber-physical energy systems (CPES) modeling methodology to build integrated modules, and define the communication architectures that each power sharing control strategy requires in an AC-MG. Based on these modules, the control designer can identify the signals and components that eventually require a time delay analysis, communication requirements evaluation, and cyber-attacks’ prevention strategies. Similarly, the modules of each strategy allow for analyzing the potential advantages and drawbacks of each power sharing control technique from a cyber physical perspective
Cyber-Virtual Systems: Simulation, Validation & Visualization
We describe our ongoing work and view on simulation, validation and
visualization of cyber-physical systems in industrial automation during
development, operation and maintenance. System models may represent an existing
physical part - for example an existing robot installation - and a software
simulated part - for example a possible future extension. We call such systems
cyber-virtual systems.
In this paper, we present the existing VITELab infrastructure for
visualization tasks in industrial automation. The new methodology for
simulation and validation motivated in this paper integrates this
infrastructure. We are targeting scenarios, where industrial sites which may be
in remote locations are modeled and visualized from different sites anywhere in
the world.
Complementing the visualization work, here, we are also concentrating on
software modeling challenges related to cyber-virtual systems and simulation,
testing, validation and verification techniques for them. Software models of
industrial sites require behavioural models of the components of the industrial
sites such as models for tools, robots, workpieces and other machinery as well
as communication and sensor facilities. Furthermore, collaboration between
sites is an important goal of our work.Comment: Preprint, 9th International Conference on Evaluation of Novel
Approaches to Software Engineering (ENASE 2014
Digital Twins and the Future of their Use Enabling Shift Left and Shift Right Cybersecurity Operations
Digital Twins (DTs), optimize operations and monitor performance in Smart
Critical Systems (SCS) domains like smart grids and manufacturing. DT-based
cybersecurity solutions are in their infancy, lacking a unified strategy to
overcome challenges spanning next three to five decades. These challenges
include reliable data accessibility from Cyber-Physical Systems (CPS),
operating in unpredictable environments. Reliable data sources are pivotal for
intelligent cybersecurity operations aided with underlying modeling
capabilities across the SCS lifecycle, necessitating a DT. To address these
challenges, we propose Security Digital Twins (SDTs) collecting realtime data
from CPS, requiring the Shift Left and Shift Right (SLSR) design paradigm for
SDT to implement both design time and runtime cybersecurity operations.
Incorporating virtual CPS components (VC) in Cloud/Edge, data fusion to SDT
models is enabled with high reliability, providing threat insights and
enhancing cyber resilience. VC-enabled SDT ensures accurate data feeds for
security monitoring for both design and runtime. This design paradigm shift
propagates innovative SDT modeling and analytics for securing future critical
systems. This vision paper outlines intelligent SDT design through innovative
techniques, exploring hybrid intelligence with data-driven and rule-based
semantic SDT models. Various operational use cases are discussed for securing
smart critical systems through underlying modeling and analytics capabilities.Comment: IEEE Submitted Paper: Trust, Privacy and Security in Intelligent
Systems, and Application
Cyber-Physical Smart Grid Security Tool for Education and Training Purposes
Cyber security education is now an essential piece of information to understand the current challenges in utilizing the technology in a secure manner. In this paper, we highlight the need of improving the human factors role and cyber security awareness in better securing the systems. We discuss a simulation tool called CPSA that can be used for education and training purposes to understand the impact of cyber-attacks on the physical power system, and overall system monitoring. The tool supports attacks modeling, different communication network topologies, simulation of bad data and malicious command received over the insecure network. This tool is helpful for students and researchers’ education to better understand the logics and prepare them with skills to evaluate the future cyber-physical system security. The tool can also be used for training purpose to the technical and non-technical staff at power utility
A Semantic Agent Framework for Cyber-Physical Systems
The development of accurate models for cyber-physical systems (CPSs) is hampered by the complexity of these systems, fundamental differences in the operation of cyber and physical components, and significant interdependencies among these components. Agent-based modeling shows promise in overcoming these challenges, due to the flexibility of software agents as autonomous and intelligent decision-making components. Semantic agent systems are even more capable, as the structure they provide facilitates the extraction of meaningful content from the data provided to the software agents. In this book chapter, we present a multi-agent model for a CPS, where the semantic capabilities are underpinned by sensor networks that provide information about the physical operation to the cyber infrastructure. As a specific example of the semantic interpretation of raw sensor data streams, we present a failure detection ontology for an intelligent water distribution network as a model CPS. The ontology represents physical entities in the CPS, as well as the information extraction, analysis and processing that takes place in relation to these entities. The chapter concludes with introduction of a semantic agent framework for CPS, and presentation of a sample implementation of the framework using C++
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