Posts in category IEEE

Single-Phase Transformer Harmonics Pr...

Single-Phase Transformer Harmonics Produced During Geomagnetic Disturbances: Theory, Modeling, and Monitoring

The main purpose of this paper is to provide a methodology to monitor harmonics produced by power transformers during geomagnetic disturbances. The advocated scheme leverages the existing infrastructure and is based on the embedded operating quantities of microprocessor-based differential protection relays. The characteristics of single-phase transformer magnetizing current are discussed. The second harmonic signature is […]

On the Validity of Certain Approximat...

On the Validity of Certain Approximations Used in the Modeling of Nuclear EMP

In legacy codes developed for the modeling of EMP, multiple scattering of Compton electrons has typically been modeled by the obliquity factor. A recent publication has examined this approximation in the context of the generated Compton current [W. A. Farmer and A. Friedman, IEEE Trans. Nucl. Sc. 62, 1695 (2015)]. Here, this previous analysis is […]

Physical System Consequences of Unobs...

Physical System Consequences of Unobservable State-and-Topology Cyber-Physical Attacks

This paper studies the physical consequences of a class of unobservable state-and-topology cyber-physical attacks in which both state and topology data for a sub-network of the network are changed by an attacker to mask a physical attack. The problem is formulated as a two-stage optimization problem, which aims to cause overload in a line of […]

Cloud-Assisted IoT-Based SCADA System...

Cloud-Assisted IoT-Based SCADA Systems Security: A Review of the State of the Art and Future Challenges

Industrial systems always prefer to reduce their operational expenses. To support such reductions, they need solutions that are capable of providing stability, fault tolerance, and flexibility. One such solution for industrial systems is cyber physical system (CPS) integration with the Internet of Things (IoT) utilizing cloud computing services. These CPSs can be considered as smart […]

A Bayesian Algorithm to Enhance the R...

A Bayesian Algorithm to Enhance the Resilience of WAMS Applications Against Cyber Attacks

Monitoring critical infrastructures is highly dependent on the accuracy of the installed sensors and the robustness of estimation algorithms. Data-injection attacks can degrade the operational reliability and security of any cyber-physical infrastructures. An attacker can compromise the integrity of the monitoring algorithms by hijacking a subset of sensor measurements and sending manipulated readings. Such approach […]

Front Lines Against the Darkness: Enh...

Front Lines Against the Darkness: Enhancing the Resilience of the Electricity Grid Through Microgrid Facilities

Power grids are supposed to be fault-tolerant, but you doubt the premise when you consider daily outages in more populated parts of the world and more recent brownouts and blackouts globally.Power engineers have been pushing forward the frontiers of power systems, and the hard-fought battle against the darkness is supposed to have been won, but […]

Smart Grids: A Cyber–Physical Systems...

Smart Grids: A Cyber–Physical Systems Perspective

Smart grids are electric networks that employ advanced monitoring, control, and communication technologies to deliver reliable and secure energy supply, enhance operation efficiency for generators and distributors, and provide flexible choices for prosumers. Smart grids are a combination of complex physical network systems and cyber systems that face many technological challenges. In this paper, we […]

Masking Transmission Line Outages via...

Masking Transmission Line Outages via False Data Injection Attacks

Today’s power systems become more prone to cyber-attacks due to the high integration of information technologies. In this paper, we demonstrate that the outages of some lines can be masked by injecting false data into a set of measurements. The success of the topology attack can be guaranteed by making that: 1) the injected false […]

Empirical Formula of Effective Coupli...

Empirical Formula of Effective Coupling Length for Transmission Lines Illuminated by E1 HEMP

This paper presents empirical formulas of the effective coupling length (ECL) for the transmission lines illuminated by the horizontally or vertically polarized E1 HEMP, which is defined by the IEC standard. Based on the analysis and the numerical data of the ECL, the empirical formulas are developed through fitting first. Then, the empirical formulas are […]

MAS based distributed automatic gener...

MAS based distributed automatic generation control for cyber-physical microgrid system

The microgrid is a typical cyber-physical microgrid system (CPMS). The physical unconventional distributed generators (DGs) are intermittent and inverter-interfaced which makes them very different to control. The cyber components, such as the embedded computer and communication network, are equipped with DGs, to process and transmit the necessary information for the controllers. In order to ensure […]