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Pulsed power network is one of the alternatives of smart grid systems. This scheme is applicable especially to localized power grid where only distributed generations supply power to consumers. In this demonstration, a miniature model of the localized pulsed power network is constructed and performed with two distributed generations, four consumers, and eight power routers. This model is operated...
Over the past decade, fast technological and industrial advances have been happening in the area of autonomous Systems of Systems (SoS). A SoS is built upon integration of several systems, where the complexity of such a structure is exponentially higher which brings challenges to its analysis. However, it also has provided a large set of new opportunities in domains such as air traffic control, defense,...
As power level grows, the power converter of wind turbines tends to use parallel-connected smaller converters. The main reason for parallel is that modular design of those smaller converters is relatively mature and cost-effective. However, the parallel of GSCs (Grid-Side Converters) is notorious for its difficulty in control. Bulky and costly filtering capacitor bank is common and LCL resonance problem...
Some approaches and techniques that allow conducting of complex physiological research using closed-architecture measurement systems of different manufacturers are discussed. The experience in developing a system with flexible configuration and in solving arising problems by virtue of integration of equipment using an external synchronizing device, is described. Parallels are drawn with the modern...
Industrial applications demand for ease of deployment, reliability and low-power in wireless networks, leading to standards like IEEE802.15.4, which include time synchronized channel hopping mechanisms. Yet, scheduling of transmissions on timeslots and channels falls outside the scope of current standards. Given the application requirements above, distributed (rather than centralized) scheduling has...
Communications within power converters is becoming increasingly important particularly with the evolution of multilevel converters having distributed control structures. In the not so distant past, communications were used primarily for reference point setting and monitoring. Currently however communication is taking on an integral role in the control of the power converters particularly those with...
A power transmission procedure is proposed for localized pulsed power networks that consist of distributed generations and consumers. The pulsed power network has affinity with distributed generations and high reliability based on decentralized system control. With this scheme, power networks can be operated where consumers are supplied power by distributed generations only. With the proposed procedure,...
this paper describes the plan design and technical features of 220kV Wangtie Smart substation, which includes many technical innovations, such as integrated measurement, control & protection devices, new busbar differential protection synchronization, adaptive sampling delay compensation of optical longitudinal differential protection, sampled value transmission mode based on online switching...
We investigate secure communication over a channel under two different classes of attacks at the same time: a passive eavesdropper and an active jammer. This scenario is perfectly modeled by the concept of arbitrarily varying wiretap channels (AVWCs). It has been shown that uncorrelated codes are not always capable of overcoming the various jamming attacks. On the other hand, correlated random codes...
At present, the optical fiber differential protection is widely used in high voltage power grid. However, due to the limitation of technology and equipment, there are still some reasons for the normal operation of optical fiber protection. In this paper, according to the actual operation of the optical fiber differential protection, the impact of optical fiber differential protection is analysed and...
Based on the requirements for creation a clock network synchronization system, it has been shown necessary to organize a check (audit) of the synchronization network, for which there is currently no full regulatory base. Proposals were made to create an appropriate regulatory base, including at the ITU-T and ETSI level.
Inter-datacenter networks need to support datacenter communication with the end-users, as well as content replication and synchronization between datacenters in a reliable manner. This paper presents a survivable manycast, anycast and replica placement strategy for optical inter-datacenter networks resulting in reduced overall network resource consumption.
Database management requires fast and reliable access to the data stored in the database for complex evaluating in intelligent information systems. Significant data amount must be handled, stored and consequently retrieved for analysis. Each data tuple is delimited by the time of occurrence or reflected by the validity. Temporal database approach uses various architectures based on data structure...
The problem of search for delay of broadband signals on the basis of code sequences is considered. The problem arises when using long code sequences in conditions of limited signal observation time and high requirements to reliability and synchronization accuracy. In these conditions use of various non-optimal methods and search algorithms, in particular, sequential-parallel search, consecutive algorithms...
Large-Scale Data Acquisition Systems are an essential part in many scientific experiments, and the processing of the large amount of data, represents a challenge in designing systems capable of managing such volume of data. Owing to the nature of this type of experiments, the processes responsible for gathering the data from devices which measure real-world phenomena, and those processes in charge...
Several communication protocols based on channel hopping have been proposed for wireless sensor networks. One prominent example is IEEE 802.15.4e, which relies on the concept of time-slotted channel hopping (TSCH). TSCH effectively mitigates poor channel conditions (caused, e.g., by fading) by means of channel changes according to a pre-defined hopping sequence. In order for nodes to participate in...
In this paper, we address the fundamental problem of improving the performance of many-to-one and many-to-many communications. Our approach is Time Division Multiple Access (TDMA) based but addresses the limitations of existing TDMA implementations in a novel way. In a nutshell, we combine packets from many senders into a single large packet transmission by exploiting capture effect achieved through...
Synchronization using flip-flop chains imposes a latency of a few clock cycles when transferring data and control signals between clock domains. We propose a design scheme that avoids this latency by performing synchronization as part of state/data computations while guaranteeing that metastability is contained and its effects tolerated (with an acceptable failure probability). We present a theoretical...
Kaleido is a novel data system for multi-device synchronization. According to the theories of conflict-free replicated data types, Kaleido enables clients to synchronize replicated data types with operations, and gurantees high availability and eventual consistency. Implemented as a back-end as a service, Kaleido server is scalable so as to deal with a huge amount of requests from massive clients...
In this proposal, we provide details on our approach for the design of a cognitive overlay system which is implemented on a heterogeneous Software Defined Radio (SDR) platform consisting of an off-the-shelf consumer laptop and a USRP X310. To ensure high flexibility, spectral efficiency and low out-of-band radiation, we chose Filter Bank Multicarrier (FBMC) as physical layer waveform. For the cognitive...
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