18 research outputs found
On statistical power grid observability under communication constraints (invited paper)
No full textPhasor Measurement Units (PMUs) have enabled real-time power grid monitoring and control applications realizing an integrated power grid and communication system. The communication network formed by PMUs has strict latency requirements. If PMU measurements cannot reach the control centre within the latency bound, they will be invalid for calculation and may compromise the observability of the whole power grid as well as related applications. To address this issue, this study proposes a model to account for the power grid observability under communication constraints, where effective capacity is adopted to perform a cross-layer statistical analysis in the communication system. Based on this model, three algorithms are proposed for improving power grid observability, which are an observability redundancy algorithm, an observability sensitivity algorithm and an observability probability algorithm. These three algorithms aim at enhancing the power system observability via the optimal communication resource allocation for a given grid infrastructure. Case studies show that the proposed algorithms can improve the power system performance under constrained wireless communication resources
Considerations for IP Interconnection of Power Grid Components
No full textThe foreseen capabilities of 5G, such as reliable and robust handling of data management can be commonly utilized by different sectors. The Electricity sector has remained for many years a stable industry using the same operational and maintenance regimes and dependable infrastructure. The need to integrate communication network domains in the Smart Grids context with 5G is considered as the next generation regarding power grids, and it is bidirectional as far as electricity and information is concerned, aiming to create a widely distributed automated energy delivery network (as in [1]). In this paper, a Communication-as-a-Service scenario is presented as a proposal of a telecom operator in order to “address” scalability, security and interoperability that a Smart grid network requires, by using communication solutions provided by 5G
Considerations for IP Interconnection of Power Grid Components
No full textThe foreseen capabilities of 5G, such as reliable and robust handling of data management can be commonly utilized by different sectors. The Electricity sector has remained for many years a stable industry using the same operational and maintenance regimes and dependable infrastructure. The need to integrate communication network domains in the Smart Grids context with 5G is considered as the next generation regarding power grids, and it is bidirectional as far as electricity and information is concerned, aiming to create a widely distributed automated energy delivery network (as in [1]). In this paper, a Communication-as-a-Service scenario is presented as a proposal of a telecom operator in order to “address” scalability, security and interoperability that a Smart grid network requires, by using communication solutions provided by 5G
Demand-Response Round-Trip Latency of IoT SmartGrid Network Topologies
No full textSmart grids are the next generation of power distribution network, using information and communications technologies to increase overall energy efficiency and service quality of the power grid. A significant challenge in smart grid development is the rapidly rising number of smart devices and how to meet the associated load on the backbone communication infrastructure. This paper designs an Internetof-Things smart grid testbed simulator to provide crucial insight into communication network optimization. Simulation for a large number of smart devices under various heterogeneous network topologies is used to analyze the maximum number of clients supportable for a given demand-response latency requirement. This latency includes all protocol overheads, retransmissions and traffic congestion, and simulator processing time is successfully eliminated from the final delay calculation via data post-processing. For a specific three-tier topology, given a round-trip latency requirement, the effect of number of smart devices per local hub and overall number of local hubs on network performance is analyzed, and crucial design insights are drawn relevant to cost-efficiency optimization of network deployment
Characterization and use of a novel optical position sensor for microposition control of a linear motor
No full textE-Learning Applications through Space Observations
No full textIn the context of the present work, we discuss several fundamental issues originating from the work already performed in the scope of the Discovery Space (DSpace) Research Project, founded by the European eTEN Work Program. The Project has been awarded as the “Project of the Month - November, 2006” and the “second best European research activity” in the scope of e-learning thematic activities (http://www. discoveryspace.net/). The prime purpose of the work was the development of a virtual science center, able to integrate robotic telescopes from all over the world into one “virtual observatory” through a proper Web-based interface, to provide an automated scheduling of the telescopes to end-users (i.e., students, teachers, and researchers) and access to a library of data and resources for lifelong learners. Potential users can benefit from professional-quality data from their local sites, using modern broadband (Internet-based) facilities (European Commission, 2002). Following the echo from the market request for more cost-effective and compelling applications to be delivered over the currently-launched broadband networks supporting the expansion of the global information society (The European Survey of National Priorities in Astronomy, 2004), the relevant service application aimed to take advantage of the convenience of the high-speed Internet access to involve its various users (originating from distinct thematic categories) in extended episodes of playful learning. The basic issue was the creation and presentation, to the market, of an entirely interoperable worldwide service, able to support options for further enhancement of e-learning facilities for teachers, students, researchers, and other practitioners. The approach has been considered the existing Internet-based facilities as the basis to “transform the today’s classroom to a research laboratory” and to develop further the European e-learning market (Chochliouros & Spiliopoulou, 2004; Danish Technological Institute, 2004). </jats:p
