In traditional intrusion detection systems (IDS) used for critical infrastructure protection, such as SCADA (Supervisory Control and Data Acquisition) systems, intrusion alerts are analyzed by human analysts (security analysts). They evaluate the alerts and take decisions accordingly. Nevertheless, this is an extremely difficult and time consuming task as the number of alerts generated could be...

New adaptive scheme for signal parameter measurement for generator monitoring and protection is presented. The algorithm is based on the orthogonal components of currents and voltages obtained with adaptive orthogonal filters. The filter data window length and coefficients are adapted according to coarsely estimated signal frequency. As a result, the measurements can be performed with high accu...

As the electric power systems in the United States become increasingly large, complex, and interconnected, the conventional relays and protection systems are proving to be inadequate during some abnormal conditions. In particular, there exists a significant history of relay protection schemes malfunctioning and, ultimately, leading to the infamous system-wide failures, known as electric power b...

In the face of strong competition, the pulp and paper industry is aiming at higher pro"tability through increased productivity and the reduction of costs. In addition, on the global scale the industry is facing increasing market demands for higher product quality, more specialty products and improved production #exibility and environmental protection. Consequently, extensive research is being c...

Protection is the most significant area of power system indeed. For single phase LT consumers, electromechanical B – Type MCB is available nowadays. Many significant workouts on various breakers have been found with excellent features like VCB, SF6 and so on. In the present paper a brief discussion is made on protection against over current scenario due to low fault impedance. The purpose of th...

The objectives of this paper consists in developing methods and technologies of command and protection of performant static power converters for the drive systems, which meet the quality of electricity requirements, using intelligent algorithms, performance computing system and DSP platforms. Keywords—Asynchronous motors, Command, Digital signal processor.

Certain European utilities have addressed these same critical issues using intelligent process management tools. The authors will present some case material and learning points from the application of these new techniques. This will include techniques to simplify the checking of settings, especially when in service, and automated approaches to greatly improve the quality of protection testing a...

Classic protection schemes for existing distribution systems designed for passive and radial networks have been shown to be inadequate for emerging distribution grids. A new protection paradigm, architecture and philosophy are required in response to changes in behaviour of fault currents. These changes are due to the introduction of distributed generation and flexible network topologies, micro...

Computer security is defined as the protection of computing systems against threats to confidentiality, integrity, and availability. An intrusion is defined as any set of actions that attempt to compromise the integrity, confidentiality or availability of a resource. The process of monitoring the events occurring in a computer system or network and analyzing them for sign of intrusions is known...

Multi-Agent Systems technology can be useful for efficiently designing and maintaining secure networks. Indeed, networks evolve at a rapid pace in terms of the number and type of components and user access queries as well as intrusion possibilities. Features such as autonomy, adaptability and flexibility of the “intelligent” agent paradigm allow managing network evolution in a controlled way. T...