Evaluation of Time-Critical Communications for IEC 61850-Substation Network Architecture

Present-day developments, in electrical power transmission and distribution, require considerations of the status quo. In other meaning, international regulations enforce increasing of reliability and reducing of environment impact, correspondingly they motivate developing of dependable systems. Power grids especially intelligent (smart grids) ones become industrial solutions that follow standardized development. The International standardization, in the field of power transmission and distribution, improve technology influences. The rise of dedicated standards for SAS (Substation Automation Systems) communications, such as the leading International Electro-technical Commission standard IEC 61850, enforces modern technological trends in this field. Within this standard, a constraint of low ETE (End-to-End) latency should be respected, and time-critical status transmission must be achieved. This experimental study emphasis on IEC 61850 SAS communication standard, e.g. IEC 61850 GOOSE (Generic Object Oriented Substation Events), to implement an investigational method to determine the protection communication delay. This method observes GOOSE behaviour by adopting monitoring and analysis capabilities. It is observed by using network test equipment, i.e. SPAN (Switch Port Analyser) and TAP (Test Access Point) devices, with on-the-shelf available hardware and software solutions

A Bayesian network for diagnosis of networked mobile robots

International audienceThe network of communicating mobile vehicles is a subclass of Wireless Networked Control Systems (WNCS) characterized by wireless communications and mobile nodes. The integration of the wireless network into control loop, given the stochastic aspects of wireless communication and mobility of its communicating entities, can lead to problems that affect system performances. In other words, the system quality of control QoC depends on the wireless network quality of service QoS state. A diagnosis method is essential to monitor, diagnose and maintain the system in an operational state. The present paper proposes a modular multi-layer Bayesian network model for diagnosis taking into account the network failures. Results regarding the system performance are presented to illustrate the relevance of the developed Bayesian Network BN to decisions making in order to lead the system to its final goal

Experimental Evaluation of an IEC 61850-Station Bus Communication Reliability

National audienceRecent improvements, in electrical power transmission and distribution, require considerations of existing regulations that enforce increasing of reliability and reducing of environment impact. Smart grids become industrial solutions that follow standardized development. These technologies are affected by international standardization in the field of power transmission and distribution. This study emphasis on modern SAS (Substation Automation System) communication standards, e.g. IEC 61850 GOOSE (Generic Object Oriented Substation Events), to present an experimental method to calculate End-To-End delay by utilizing monitoring capabilities and using network equipment such as SPAN and TAP devices

On the way of harmonization of PhD in Europe in Electrical and Information Engineering: status and recommendations

International audienceIn the frame of the thematic networks devoted to the development of LifeLong Learning (LLL) in Europe, the ELLEIEC project, more especially focused on Electrical and Information Engineering, the situation of PhD students in Europe was analyzed. Thanks to a questionnaire submitted to all the members of this network, an overview on 23 European countries was obtained. This paper tries to highlight the several aspects of the status and proposes recommendations in order to make easier the mobility and exchange in Europe at PhD level. The final part of this work is devoted to recommendations to the European partners in order to improve the present situation and to create a real European space for doctoral studies

Retours d'expériences sur la mise en oeuvre d'une Licence Professionnelle internationalisée en Réseaux et Télécommunications

Dossier spécial : Formations internationalesInternational audienceUn groupe d'étudiants de la Licence Professionnelle " Réseaux Sans Fil et Sécurité " de l'IUT de Grenoble a été internationalisé depuis la rentrée 2007. Ce groupe est constitué d'étudiants provenant de divers pays, en majorité non francophones, ce qui signifie que tous les enseignements sont en anglais. L'objectif de cette formation est de mettre en oeuvre une formation anglophone, dans un contexte international. Les étudiants préparent la Licence soit en inscription directe, soit par l'intermédiaire d'accord d'échanges bilatéraux (Brésil, bientôt Malaisie ou Palestine) ou d'accords ERASMUS, ils peuvent dans ces cadres obtenir pour certains un double-diplôme. La mobilité est encouragée, y compris pour les étudiants français qui participent à l'aventur

Dependability Optimization of Process-level Protection in an IEC-61850-Based Substation

International audiencePower substations are intensively renovated toward using information and communication technologies such as object oriented modeling and Ethernet networks. In the last two decades, Substation automation systems used capabilities of network communication services adopted from sophisticated international standardization such as IEC 61850. Distributed safety related functions take advantage of these technologies to protect the process-level equipment. Substation devices such as intelligent electronic devices, measurement units and circuit breaker controllers, with new capabilities, i.e. enabling IEC 61850, are integrated to build the protection and control functions that form the safety-related system. The objective of this research is to evaluate quantitatively the dependability for transformer protection architectures in the bay level.Safety integrity levels model, described in both IEC 62061 and IEC 61508, gives measurements for safety integrity levels according to the probability of failure. The determination of these levels is an approach to estimate system dependability

Diagnostic des Systèmes Mobiles Communicants

International audienceLes systèmes commandés en réseau, comme les robots mobiles communicant avec une station distante, sont une nouvelle génération de systèmes distribués où la communication entre les actionneurs, les capteurs et le contrôleur est assurée par un réseau de communication. Mais l'intégration du réseau dans la boucle de commande engendre des problèmes au niveau de la performance du système d'où la nécessité d'avoir une méthode de diagnostic et de prise de décision, pour localiser les défaillances. Ce papier présente une méthode de diagnostic utilisant l'approche bayésienne

New lift safety architecture to meet PESSRAL requirements

ISBN : 978-1-4799-8171-7International audienceAs part of new lift control generation, we will analyze a transition case from an electrical/electro-mechanical components to a networked control system. The main element we focus on in the lift system is the safety chain. This paper will describe the analysis of dependability requirements (IEC 61508) for the next electronic lift control

La sécurité des ascenseurs avec des communications Ethernet-Based Real-Time

National audiencel'évolution des systèmes de contrôle industriels tendent vers des infrastructures de plus en plus connectées, ce qui les rendent plus dépendantes de réseaux et de protocoles de communication utilisés. Plusieurs travaux existants se sont focalisés sur la fiabilité de ces systèmes et la robustesse de leurs modèles de contrôle en cas de pannes ou de dysfonctionnement. Ces travaux n'ont pas considéré l'aspect réseau qui est devenu un vecteur d'attaque important étant donné l'utilisation de protocoles de communication pour l'échange des informations entre les équipements. Les conséquences de ces attaques, parfois deviennent extrêmement dévastatrices. En effet, récemment ces réseaux sont devenus la cible de plusieurs attaques en exploitant des vulnérabilités présentes dans les couches logicielles ou protocolaires de leurs équipements. Dans le cadre de la nouvelle génération de commande de l'ascenseur, un cas de transition sera analysé à partir d'un composant électrique/électrotechnique au réseau de composants électroniques communiqués dans le cadre de la sécurité du système de déplacement d'un ascenseur. La proposition repose sur la sécurité des modules IP interconnectés entre eux, qui supportent un protocole temps réel industriel (Powerlink, EtherCat et Sercos). Cette proposition représente un des démonstrateurs du projet collaboratif avec un noyau déterministe sûr de fonctionnement par construction

Some Considerations on Dependability Issues and Cyber-Security of Cyber-Physical Systems

International audienceFor the last recent years, there has been a convergence between computer engineering approaches and automation aspects (industrial systems, internet of things) also called cyber-physical systems, for the development of process-based cyber-security strategies. Classically, security studies are based on risk analysis. Compared to classical IT approaches, the actual process (for instance a nuclear power plant or a chemical process) or system (autonomous car, drone) are taken into account in our approach for two reasons. The first reason is that the vulnerabilities of such systems or processes vary dynamically as a function of the time, the second reason is because the "standards" context is depending on the application domain and relationships with the IEC 61508 functional safety standard seems relevant. The paper presents a state of the art of problematics and proposed some approaches to these issues