A Computer-Aided Design System for Protecting Substations and Overhead Power Lines from Lightning

Borisov, R. K.; Zhulikov, S. S.; Koshelev, М.А.; Maksimov, B. K.; Mirzabekyan, G. Z.; Turchaninova, Yu. S.; Khrenov, S. I.

doi:10.3103/s1068371219010036

Cited by 6 publications

(9 citation statements)

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“…A generalization of the spectral characteristics of the signals induced by the electromagnetic radiation of the nearby impulse streamer corona flash on model elements of different types showed the close values of all frequency parameters inside every group of the electric amplification coefficient for rod and elongated model elements (Tables 6 and 7). The maximal values of the upper level of the characteristic frequency in the wavelet spectrum of the induced signal (the electromagnetic radiation of upward streamers was sometimes in the range of 1.0-1.5 GHz) were discovered in group II (an amplification coefficient of [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Group III (amplification coefficient > 25) showed similar, but slightly lower, values.…”

Section: Analysis Of Results and Discussionmentioning

confidence: 99%

“…If upward streamer discharges form on the sensors (especially the rod kind, and on those included in group III) of the monitoring system, frequencies that are in the spectrum of a current impulse (up to dozens or hundreds of megahertz) will be in the working frequency range of the sensor. This could lead to sensor failure, including errors in the digital processing of data by the analog-digital converters [11][12][13]29].…”

Section: Analysis Of Results and Discussionmentioning

confidence: 99%

“…Most often, these devices are rods, cylindrical, or flat. It is therefore necessary to ensure their electromagnetic compatibility [11][12][13]. Moreover, it is not entirely clear how these devices are affected by the different kinds of discharge phenomena that form Appl.…”

Section: Introductionmentioning

confidence: 99%

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Physical Simulation of the Spectrum of Possible Electromagnetic Effects of Upward Streamer Discharges on Model Elements of Transmission Line Monitoring Systems Using Artificial Thunderstorm Cell

et al. 2021

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The results of a physical simulation using negatively charged artificial thunderstorm cells to test the spectrum of possible electromagnetic effects of upward streamer discharges on the model elements of transmission line monitoring systems (sensor or antennas) are presented. Rod and elongated model elements with different electric field amplification coefficients are investigated. A generalization is made about the parameters of upward streamer current impulse and its electromagnetic effect on both kinds of model elements. A wavelet analysis of the upward streamer corona current impulse and of the signal simultaneously induced in the neighboring model element is conducted. A generalization of the spectral characteristics of the upward streamer current and of the signals induced by the electromagnetic radiation of the nearby impulse streamer corona on model elements is made. The reasons for super-high and ultra-high frequency ranges in the wavelet spectrum of the induced electromagnetic effect are discussed. The characteristic spectral ranges of the possible electromagnetic effect of upward streamer flash on the elements of transmission line monitoring systems are considered.

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Section: Analysis Of Results and Discussionmentioning

confidence: 99%

Section: Analysis Of Results and Discussionmentioning

confidence: 99%

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Physical Simulation of the Spectrum of Possible Electromagnetic Effects of Upward Streamer Discharges on Model Elements of Transmission Line Monitoring Systems Using Artificial Thunderstorm Cell

et al. 2021

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“…Mechanism is the backbone of mechanical products, mechanical engineering is the foundation of mechanical products, mechanics is one of the most important theoretical disciplines on which scientific mechanical design is based, and its main task is to design good performance (including innovation, invention and important innovation, etc. ) [3][4]. Therefore, mechanism is an important research content for the conceptual design of science and mechanical products.…”

Section: Introductionmentioning

confidence: 99%

WEB-Based Computer Aided Innovation Design

Wang¹

2021

IJFET

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The development of science and technology, the gradual promotion of various new technology tools in various fields, and mechanical design also actively encourage the continuous application of various new technologies. The design provides higher comfort, greatly reduces product design time, and creates higher economic benefits for the enterprise. The application of computer-aided design in mechanical design is briefly discussed. The scheme design of the mechanical system directly determines the function, quality and cost of the product and is the key to product design. At present, the research and application of computer-aided design technology in the design information expression, structural performance analysis and product data management of general mechanical systems are becoming more mature, but the support for scheme design is still relatively weak. Given that computer-aided solution design of mechanical systems often relies on expertise in specific fields, and may require the use of dedicated design models and specific intelligent design methods based on the characteristics of the design problem, most of its research and development work is aimed at specific areas and used for special purpose systems for mechanical systems. Two principles of innovative design ideas are summarized: the shortest path principle and the similarity principle, the current research flaws based on modern proof technology are analyzed, and a combination of genetic algorithms is proposed to solve it. A quantitative method of physical similarity was proposed, and the similarity was used as the basis to combine genetic algorithm with computer-aided and initial population selection to create an improved genetic algorithm. In this paper, a computer-aided innovation design system based on WEB is studied. This article takes automobile cover molds as an object. When the mechanical system workload is 20J, the traditional method consumes 60,000 yuan, and this article consumes 13,000 yuan. When the mechanical system workload is 60J, the traditional time consumed by this method is 50min, and the time consumed by this method is 15min. The working efficiency of the traditional method is 70%, and the working efficiency of this method is 93%.

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“…may be compromised under the influence of lightning and atmospheric electricity [3,11,12]. It is not entirely clear how the discharge phenomena forming on both rod and elongated ground objects under the influence of thunderclouds and lightning (e.g., flashes of streamer corona, ascending leaders, the main discharge) and the electromagnetic radiation they create will affect functioning of such elements [13,14]. The purpose of this work is to estimate the influence of electromagnetic radiation emerged from incomplete upward leader discharge phenomena, located close to the remote monitoring system, on the system's elements.…”

Section: Introductionmentioning

confidence: 99%

Artificial Negative Polarity Thunderstorm Cell Modeling of Nearby Incomplete Upward Discharges’ Influence on Elements of Monitoring Systems for Air Transmission Lines

et al. 2021

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The article represents results of a physical simulation of incomplete upward leader discharges induced on air transmission lines’ elements, using charged artificial thunderstorm cells of negative polarity. The influence of such discharges on closely located model sensors (both of rod and elongated types) of digital monitoring systems, as well as on the models of receiver-transmission systems of local data collection (antennas), was determined. Effect of heterogeneity of electromagnetic field caused by incomplete upward discharges on frequency specter of signals generated on sensors and antennas was estimated. Wavelet analysis was carried out to determine the basic frequency diapasons of such signals. Based on experimental data obtained, suppositions about the extent of influence of nearby incomplete leader discharges on the functioning of currently used systems of transmission lines’ monitoring were made.

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A Computer-Aided Design System for Protecting Substations and Overhead Power Lines from Lightning

Cited by 6 publications

References 0 publications

Physical Simulation of the Spectrum of Possible Electromagnetic Effects of Upward Streamer Discharges on Model Elements of Transmission Line Monitoring Systems Using Artificial Thunderstorm Cell

Physical Simulation of the Spectrum of Possible Electromagnetic Effects of Upward Streamer Discharges on Model Elements of Transmission Line Monitoring Systems Using Artificial Thunderstorm Cell

WEB-Based Computer Aided Innovation Design

Artificial Negative Polarity Thunderstorm Cell Modeling of Nearby Incomplete Upward Discharges’ Influence on Elements of Monitoring Systems for Air Transmission Lines

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