Digital Distribution Network Research Articles

A Real-Time Resource Dispatch Approach for Edge Computing Devices in Digital Distribution Networks Considering Burst Tasks

Edge computing technology can effectively solve huge challenges posed by the large number of terminal devices accessing and massive data processing in digital distribution networks. Burst tasks, such as faults and data requests from the cloud, can occur at any time for edge computing devices in distribution networks. These tasks are unpredictable and usually hold the highest priority and must be completed as soon as possible. Although resources can be reserved partially at each period in the pre-scheduled operation plan, they may still be insufficient to handle burst tasks adequately. A real-time resource dispatch approach for burst tasks is developed in this study to address the above problems. The concept of flexibility for edge computing devices is presented, determining the real-time dispatch duration. Real-time resource dispatch and task handling processing are analyzed in detail, considered as task real-time dispatch models, computation process real-time dispatch constraints, and resource limitation constraints. The proposed real-time resource dispatch approach takes full advantage of the transferable characteristics for partial original plan tasks to adjust the pre-scheduled operation plan and release flexible resources for immediate processing of the burst task, completing burst tasks quickly and minimizing the impact for previous planned tasks on the edge computing device. The capability of the proposed method to efficiently deal with the burst tasks is also verified by the case study.

Research on Digital Distribution Network Micro-application and Precise Control of Distribution Operations Based on Grid Resource Business Center

Abstract This paper discusses the design and implementation of the grid intelligent micro-application, involving two core aspects: technical architecture and data architecture. First, the article successfully constructs the basic framework of grid intelligent micro-application, which realizes distribution network equipment’s inspection, operation, and maintenance control functions. It further establishes a collaborative regulation model for digital distribution network micro-applications, focuses on calculating and analyzing distribution banding operations, and proposes a precise specification for the methods easily confused in actual operations. The focus of the study includes comparative analysis of voltage and current overrun probabilities before and after regulation to assess the effectiveness of micro-applications in load forecasting and anomaly warning. The results show that using digital distribution micro-applications significantly reduced the likelihood of overruns at most weak points of the grid by an average of 68%, while the year-on-year reduction of anomalies reached 35%. In addition, the micro-application achieved over 90% accuracy in charge prediction, an impressive performance. By simplifying the distribution operation process, this study significantly improves the feedback speed and efficiency of field operation information, which is of great practical significance and application value for the digital construction of power grid distribution network.

Poésies des francophonies: état des lieux (1960–2020). Sous la direction de Florian Alix, Évelyne Lloze et Romuald Fonkoua

This ambitious and successful volume brings together twenty chapters with a clear Introduction by the editors. The first of five sections offers theoretical and historical discussions of Francophonie. Giovanni Dotoli, for instance, proposes a definition of poetry based on a ‘langue en partage’ (p. 17), while Maxime Del Fiol explains that most francophone poets speak or write more than one language, leading to ‘hétérolinguisme’ and a ‘plurivocité tensionnelle’ in France as well as in other francophone countries (pp. 71, 73). Swiss poetry, Antonio Rodriguez argues, offers a way of understanding globalization, in a process moving from poetry that reproduces the national model of France (1960–80), to a culture of exchange and diversity (1980–2010), and finally, since 2010, sees progression to new global, digital distribution networks. Chapters in the second and third parts present individual writers through the lens of the poetic subject, as it relates to different places and to others respectively. Part Four examines varieties of the genre of poetry while the final part discusses examples of poetry’s interaction with other genres. Collectively, the chapters span a wide, though necessarily non-exhaustive, range of geographical areas. Poets from Quebec are most heavily represented, but the volume also includes discussion of writers from Martinique, Haiti, Senegal, Republic of the Congo, Tunisia, Algeria, Lebanon, Madagascar, Belgium, and Switzerland, as well as poets who adopted the French language (including Lorand Gaspar, presented by Emma Curty), or those living in France such as rappers who reclaim ‘Afropéanité’ (discussed by Magali Nachtergael, p. 171). Poets’ reflections on place and language are shown frequently to be accompanied by a splitting of the self, and a sense of exile. But texts do not always display a conflicted relationship to France or the French language. Indeed, one of the strengths of the volume is that the poets’ concerns are considered on their own terms and not via their relationship to a ‘norm’ of France or the variety of French spoken there (Del Fiol, p. 65). The chapters consider well-known figures such as Gaston Miron (Delphine Rumeau), Édouard Glissant (Samia Kassab-Charfi), or Vénus Khoury-Ghata (Béatrice Bonhomme), alongside others who have less recognition. For instance, although Youcef Sebti’s work was included in an anthology of Algerian poets edited by Jean Sénac in 1971 (Anthologie de la nouvelle poésie algérienne (Paris: Librairie Saint-Germain-des-Prés)), those poets were not included in French lists after 1962, nor were they published in post-war Algeria (Laure Michel). Similarly, in her discussion of the Congolese Phratrie, a group in which older male poets supported younger writers, Céline Gahungu explains that the former were rarely able to help the latter publish their work, and certainly not internationally. Essays including Bernard De Meyer’s contribution on slam remind us of the breadth of contemporary poetic forms, and many of the chapters display a welcome attention to the detail of poetic texts; one example among those valuable essays is Emna Kharmachi’s analysis of work by Amina Saïd. Although more male poets are studied here, there is nevertheless serious consideration of some work by women: as well as Khoury-Ghata and Saïd, essays examine Marie Uguay (Pierre-Yves Soucy) and Anne Hébert, Louise Dupré, and Hélène Dorion (Michael Brophy). Overall, the volume makes a valuable contribution to expanding readers’ knowledge and understanding of the rich variety of poetic writing in French across the world.

Fault location method for interphase short circuit in digital distribution network based on genetic algorithm

Fault location method for interphase short circuit in digital distribution network based on genetic algorithm

Fault location method for interphase short circuit in digital distribution network based on genetic algorithm

Fault location method for interphase short circuit in digital distribution network based on genetic algorithm

Distributed State Estimation in Digital Distribution Networks Based on Proximal Atomic Coordination

With the emerging digitalization technologies represented by edge computing, distribution networks are gradually transforming into digital distribution networks (DDNs). The realization of edge computing drives the distributed operation of DDNs, where multiple areas exchange boundary information through edge computing devices. Benefitting from the data acquisition and computing capacity of edge computing devices, it is feasible to perform accurate and real-time state estimation on the edge side. Aiming at the state perception with edge computing devices in DDNs, this paper proposes a distributed state estimation (DSE) method based on the proximal atomic coordination (PAC) algorithm. Firstly, based on convex relaxation optimization, the state estimation model is converted into a positive semidefinite programming model to solve the nonconvexity caused by nonlinear measurements, which ensures the accuracy and convergence of state estimation. Then, a DSE method based on the PAC algorithm is proposed to exchange information of each area, which reduces the computation time and realizes the efficient state estimation on the edge side. The model and the effectiveness of the proposed method are numerically demonstrated on the modified PG&E 69-node system and the test case from a practical pilot in Guangzhou, China.

Evaluating the Effectiveness of the Application of High-Speed Semiconductor Control Devices in Electrical Distribution Networks

Modernization of electrical distribution networks and their transformation into digital distribution networks allows the installation of intelligent controlled devices and combining them into a single system. In this paper, we consider the effectiveness of using modern high-speed semiconductor control devices: reactive power compensation means and semiconductor voltage-control devices for transformers under load. Using the example of a specific object of a regional distribution electric network, the technical and economic efficiency of the application of reactive power compensation means are analyzed. The possibility of obtaining a technical effect and economic return is shown. The potential of using innovative high-speed semiconductor devices for voltage regulation of transformers under load was demonstrated. The efficiency of using such devices as means of ensuring regulatory requirements for a slow voltage change in electrical networks is shown.

The Research of the Real-Time Performance of Power Flow Visualization Based on Digital Power Distribution Network

Based on the study of 10 kV digital power distribution network (DPDN) power flow visualization, the paper uses hierarchical backward and forward sweep algorithm (HBAFSA) to significantly shorten the calculation time and improve the real-time performance of power flow, which analysis and layers the distribution network topology according to the breadth-first search and then calculate in parallel between the same level. Programming with Visual C# in Visual Studio 2010 environment gets the GIS data library to actively obtain real-time operating data of distribution network from the SCADA data library, and calculates rapidly with the HBAFSA, and transfers the real-time power flow data to the GIS data library. On the platform of the GIS, clicking nodes and branches can get the visualized real-time power flow, which indicates the achievement of the real-time power flow of the DPDN visualization on the platform of the GIS.

Capacity of broadcast channels in the near-future CATV architecture

Reports fundamental information theoretic results for near-future CATV downstream digital distribution networks. The CATV industry is evolving to this network architecture to quickly replace plant that would otherwise be left with serious reliability problems owing to deployment of cascades of electronic amplifiers. This new architecture is composed of a passive fiber trunk feeding COAX branches altogether serving about 200 homes. Frequency-division-multiplexed digital signals subcarrier intensity modulate a laser illuminating a single-mode fiber. Only one (electronic) amplifier is used and it is located at the COAX feed. Aside from additive white Gaussian noise (AWGN) from shot noise exacerbated by the amplifier, a significant impairment is the clipping stemming from the intensity modulation. A dimensionless parameter identified as key to describing channel capacity is I/sub 0//(qFB) where I/sub 0/ (0.01 to 1 mA) is the photocurrent delivered, q is electron charge, F (10 log F=2 to 10 dB) is the electronic amplifier effective noise figure and B (200 MHz to 1 GHz) is the overall system bandwidth. The following are reported: the optimal design of the head end where signals are launched, availability of extraordinarily high capacities, and how a hefty fraction of capacity might be achieved.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

New technology and market structure: Evidence from the music recording industry

This paper explores how new scale-reducing technology induced two periods of substantial new entry into the music recording industry. Many of the new firms were product innovators, whose products became popular with consumers. This in turn leads to shifts in the distribution of industry market share, and hence market structure. Reconcentration in the industry resulted largely from horizontal mergers, among other reasons. New digital distribution networks may induce a third-wave of industry deconcentration.

Consortel: A CATV/TELCO solution, providing a fully digital fibre‐based broadband switched distribution network

AbstractTelephone companies and cable operators have many needs in common. Both wish to increase revenues by adding new services. Both plan to convert to fibre optics in order to lower costs in installation, operations and maintenance. Each must provide basic services economically while replacing obsolete equipment and infrastructures.Each year, network operators devote a large portion of their revenues to the provision and maintenance of network‐based services and equipment. Lately, activities such as installing equipment at a customer site and detecting and repairing network problems have become an area of concern as organizations strive to minimize technological impacts and achieve operations savings.This paper is divided into three parts. First, the reader is provided with a description of the Consortel network architecture. This functional description is then completed by a description of the software applications that support network operations activities. Finally, economic considerations are examined in the implementation of this digital distribution network.

A distribution system for digital images from diverse image sources. Incorporating a local area network in an imaging environment.

This paper proposes a unified image-processing and viewing system as a viewing station and initially as the central file server in a unified digital image distribution and processing network, linking various digital image sources through a high speed data link and a common image format. The network allows for viewing and processing of all images produced within the complex and for locating viewing stations in any number of convenient areas. The system proposed can be slowly expanded to include all the digital images produced within the department of institution.