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Boyko, N. I.; Евдошенко, Л. С.; Зароченцев, А. И.; Ivanov, V. A.; Tour, A. N.

doi:10.1023/a:1017515003483

Cited by 4 publications

(5 citation statements)

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“…Let us point out that this type of high-voltage electric discharge belongs to one of the known and well-studied classical types of self-discharge in a dielectric today in electrophysics [6][7][8]. Electric discharge technologies based on the transformation of electrical energy stored, as a rule, in powerful high-voltage capacitor batteries into the energy of phase transitions, chemical reactions, explosion of solid substances, shock waves, into mechanical work, heat and other types of energy [3,[9][10][11], have one fundamental difference from other technologies: they are capable of providing a large energy density in the pulse mode of its action to the substance under investigation or the processed product (object). At the same time, the time of this action can vary in a wide range: from hundreds of milliseconds to units of nanoseconds.…”

Section: State-of-the-art and Relevance Of The Problemmentioning

confidence: 99%

“…At the same time, the time of this action can vary in a wide range: from hundreds of milliseconds to units of nanoseconds. Taking into account the prospects of electrical discharge technologies based on pulse spark discharge, in recent decades the following important scientific results were obtained by domestic and foreign electrical engineering scientists and electrophysicists in this area of high-voltage pulsed technology (HPT) [1,[3][4][5][6][7][8][9][10][11][12]: data on the dependence of the electrical strength of many dielectrics from the length of the interelectrode gaps, the geometry of the electrodes used in these gaps of different metals and conductive compositions, the amplitude-time parameters (ATPs) of the electric voltage (current) acting on the dielectric, and the electrophysical parameters of the surrounding dielectric insulating medium; volt-second characteristics of electrical breakdown of many types of dielectrics; found distributions of the strength of high pulse electric field in linear and heterogeneous dielectrics placed in interelectrode spaces with electrodes of different configurations; determined main types of electric discharge structures and the parameters of discharge plasma channels in the main types of dielectrics at different ATPs of voltage (current); obtained the first adequate calculation data for computer modeling of complex electrophysical processes of the development of the plasma channel of an electrical pulse spark discharge in some types of dielectrics.…”

Section: State-of-the-art and Relevance Of The Problemmentioning

confidence: 99%

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A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric

Baranov

2024

Electrical Engineering & Electromechanics

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Goal. Development of the generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge in the homogeneous dielectric of the different aggregate state. Methodology. Basis of physical optics, theoretical electrical engineering, electrophysics bases of technique of high-voltage and large pulse currents, bases of high-voltage pulse technique and measuring technique. Results. Development of physical principle of development of plasma channel of an electric pulse spark discharge is executed in a homogeneous gas dielectric on the applied example of the use in calculations and experiments of the double-electrode discharge system (DEDS) with a long air interval, testing action of standard interconnect аperiodic pulse of high-voltage of temporal shape of Tm/Тd≈200 μs/1990 μs of positive polarity. The generalized formula is got for the calculation of total length of lc of the real way of development of an pulse spark discharge in an air dielectric, which allowed to formulate the offered physical principle in the following kind: «The plasma channel of an pulse spark discharge in a gas dielectric spreads from one of its points to other after a way length of lc, providing the least falling on it of electric voltage of Uc». It is shown that this principle in the first approaching can be applied and to the homogeneous liquid and hard dielectrics. Comparison of the developed physical principle of distribution of plasma channel of an electrical spark discharge is executed in a dielectrical environment with fundamental Fermat physical principle (a law) for distribution of light in an optically transparent environment, which specifies on mathematical likeness and closeness on destiny of these physical principles. Calculation estimations of falling of electric voltage of Uc on total length of lc of the real zigzag way of development in the air dielectric of DEDS a «edge-plane» with the least length of its discharge interval of lmin=1,5 m is presented, that a value Uc does not exceed 9 % from the experimental level of aggressive voltage of Umd≈611,6 кV in this DEDS for the аperiodic pulse of voltage of Tm/Тd≈200 μs/1990 μs. It is set that the estimated time of td advancement of leader channel of electric pulse discharge in air DEDS (lmin=1,5 m) on its real way total length of lc≈1,53 m makes td≈15,3 μs, and experimental duration of cut of Tdc of the indicated аperiodic impulse of voltage utilized in experiments, characterizing time of short circuit by the plasma channel of discharge of air interval in DEDS, appears equal Тdc≈td≈17 μs. Originality. The generalized physical principle of development of plasma channel of a high-voltage electrical pulse spark discharge is first developed in the homogeneous dielectric of the different aggregate state. Practical value. Application in electrical engineering practice and high-voltage pulse technique of the offered principle of distribution in the dielectrics of plasma channel of an pulse spark discharge will allow to develop both new and to perfect the existent methods of computer design of electro-discharge processes in the gas, liquid and hard insulation of different high-voltage electrical power engineering and electrophysics devices, directed on the increase of reliability of their operation.

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Section: State-of-the-art and Relevance Of The Problemmentioning

confidence: 99%

Section: State-of-the-art and Relevance Of The Problemmentioning

confidence: 99%

A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric

Baranov

2024

Electrical Engineering & Electromechanics

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“…Vacuum, various gases and their mixtures, liquids and solids can be used as working dielectric media of the considered HVES discharge circuit switches with powerful CSE [1][2][3][4]. A wide application in the field of modern HVPT because of its comparative cheapness and simplicity in manufacturing has received high-voltage high-current air switches (HVCAS) of atmospheric pressure at a constant voltage up to ±125 kV and commutated pulse currents up to ±1 MA amplitude [1,[5][6][7]. As a rule, the main electrodes of HVCAS are made of medium and refractory metals (for example, steel and molybdenum) or metal compositions (for example, «tungsten-copper» compositions) [1,[3][4][5][6][7].…”

mentioning

confidence: 99%

“…A wide application in the field of modern HVPT because of its comparative cheapness and simplicity in manufacturing has received high-voltage high-current air switches (HVCAS) of atmospheric pressure at a constant voltage up to ±125 kV and commutated pulse currents up to ±1 MA amplitude [1,[5][6][7]. As a rule, the main electrodes of HVCAS are made of medium and refractory metals (for example, steel and molybdenum) or metal compositions (for example, «tungsten-copper» compositions) [1,[3][4][5][6][7]. One of the drawbacks of these HVCAS is the increased electroerosive wear of the working surfaces of their main metal electrodes, caused by the intense exposure of the high-power heat flux of the plasma channel of the spark discharge in the areas of its binding at the electrodes of such switches.…”

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An Approximate Calculation of Energy Dissipation and Electric Erosion of Electrodes in the High-Voltage High-Current Air Switch of Atmospheric Pressure

Баранов¹,

Rudakov²

2017

Elektroteh. elektromeh.

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Приведены результаты применения нового инженерного подхода к расчету тепловой энергии, выделяющейся в плазменном канале искрового разряда и на массивных металлических электродах высоковольтного сильноточного воздушного коммутатора (ВСВК) атмосферного давления, используемого в составе высоковольтной электрофизической установки (ВЭФУ) с мощным емкостным накопителем энергии (ЕНЭ). Полученные соотношения для определения указанной энергии позволяют выполнять расчетную оценку баланса электрической энергии в разрядной цепи ВЭФУ с ЕНЭ с учетом ее тепловых потерь в ВСВК. Показано, что на основе разработанного подхода может быть выполнен расчет электрической эрозии основных металлических электродов ВСВК. Получены новые расчетные выражения для нахождения глубины одиночного кратера разрушения на металлических электродах ВСВК и массы металла, выбрасываемой искрой из электродов исследуемого коммутатора за один разряд ЕНЭ установки. Библ. 21, рис. 3. Ключевые слова: высоковольтный сильноточный воздушный коммутатор, выделяемая тепловая энергия в воздушной искре и на электродах коммутатора, электрическая эрозия металлических электродов коммутатора, глубина одиночного кратера разрушения на электродах коммутатора, выбрасываемая масса металла из одиночного кратера разрушения электродов коммутатора.

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Triggered gas switch with a sharply non-uniform electric field at the electrode with negative potential

Alexeenko

Zherlitsyn

Kokovin

et al. 2019

J. Phys.: Conf. Ser.

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The paper presents the results of studies for two triggered high-pressure gas switches intended for pulse-periodic capacitive storages with the stored energy level of about 100–1000 J. The operating voltage of the first switch is up to 50 kV, for the second switch is over 200 kV. A feature for both switches is a configuration with a sharply non-uniform field at the electrode with negative potential. In the charging process of a capacitive energy storage, a corona-streamer discharge occurs in the switch, the current of which increases with increasing voltage. Cathode discharge plasma shields a sharp cathode edge and local areas of inhomogeneity with increased emission and also gives a uniform flow of initiating electrons into the gap of the switch. As a result, conditions in the discharge gap vary slightly from pulse to pulse.

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Cited by 4 publications

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A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric

A generalized physical principle of development of plasma channel of a high-voltage pulse spark discharge in a dielectric

An Approximate Calculation of Energy Dissipation and Electric Erosion of Electrodes in the High-Voltage High-Current Air Switch of Atmospheric Pressure

Triggered gas switch with a sharply non-uniform electric field at the electrode with negative potential

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