The Metrology Support in Ukraine of Tests of Objects of Energy, Aviation and Space-Rocket Engineering on Resistibility to Action of Pulses of Current (Voltage) of Artificial Lightning and Commutation Pulses of Voltage

Баранов, М. И.; Buriakovskyi, S. G.; Rudakov, S. V.

doi:10.20998/2074-272x.2018.5.08

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…This functional test of the critical sections S CCi of wires (cables) recommended for calculation determination by the relation (1) and the critical amplitudes of the pulse current densities i p (t) in their cores (shells) calculated by relation δ CCi ≈I mp /S CCi we carry out using a powerful high-current high-voltage LCG [13] which simulates the normalized by [10] ATPs of the pulsed A-components of the artificial lightning current (see Fig. 1) and is equipped with verified by the state metrological service appropriate measuring equipment [15]. To do this, we first realize on the specified generator the effect of this lightning current component with ATPs normalized by requirements [10] (I mp1 ≈−205 kA; I mp3 ≈−16.9…”

Section: Calculation Determination Of Critical Crosssections S Cсi Anmentioning

confidence: 99%

Calculation and Experimental Determination of Critical Sections of Electric Wires and Cables in the Circuits of Devices of High-Voltage High-Current Pulse Technique

Baranov¹

2019

Elektroteh. elektromeh.

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Purpose. Implementation of calculation and experimental determinations of critical sections and current densities in electric wires and cables of circuits of devices of high-voltage high-current impulse technique (HHIT), characterized flowing of pulse current i p (t) with different amplitude-temporal parameters (ATPs). Methodology. Electrophysics bases of technique of highvoltage and large pulse currents, theoretical bases of electrical engineering, bases of electrical power energy, technique of high electric and magnetic fields, and also measuring technique. Results. The results of the developed electrical engineering approach are resulted in calculation choice on the condition of electric explosion (EE) in atmospheric air of current-carrying parts of cable-conductor products of critical sections of S CCi of the uninsulated wires, and also the insulated wires and cables with polyvinyl chloride (PVC), rubber (R) and polyethylene (PET) insulation with copper (aluminum) cores (shells) on which in the circuits of HHIT the pulse axial-flow current i p (t) flows with arbitrary ATPs. On the basis of this approach the results of choice of critical sections S CCi are shown for the indicated electric wires (cables) of power circuits of HHIT with pulse current, ATPs of which with amplitudes of I mp =(0.1-1000) kA change on a аperiodic law or law of attenuation of sine wave in nano-, micrо-and millisecond temporal ranges. The results of calculation estimation of critical amplitudes of current densities δ CCi of-pulses of current i p (t) of the examined temporal shapes are presented in the indicated electric wires and cables of circuits of HHIT. By a calculation way it is set that critical amplitudes of current densities δ CCi of pulse current i p (t) for its indicated temporal shapes in the copper (aluminum) cores of the uninsulated wires and insulated wires and cables with copper (aluminum) cores (shells), PVC, R and PET insulation for nanosecond range are numerically 1176 (878) kA/mm 2 , for the microsecond range 64 (48) kA/mm 2 and for the millisecond range 1.29 (0.97) kA/mm 2. By the powerful high-voltage generator of current of artificial lightning experimental verification of applicability of the offered calculation relations is executed for the choice of critical sections S CCi and amplitudes of current densities δ CCi in wires (cables) at their EE. Originality. First by a calculation way for the specific temporal shapes of pulse currents i p (t) in the discharge circuits of HHIT, changing in nano-, micro-and millisecond temporal ranges with the wide change of the amplitudes I mp on an аperiodic law or law of attenuation of sine wave, the numeral values of critical sections S CCi and amplitudes of current densities δ CCi are obtained for the uninsulated wires, insulated wires and cables with copper (aluminum) cores (shells), PVC, R and PET insulation. Practical value. Application of the obtained results is in practice of tests of objects of electrical power energy, aviation and space-rocket technique on resistibility...

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Section: Calculation Determination Of Critical Crosssections S Cсi Anmentioning

confidence: 99%

Calculation and Experimental Determination of Critical Sections of Electric Wires and Cables in the Circuits of Devices of High-Voltage High-Current Pulse Technique

Baranov¹

2019

Elektroteh. elektromeh.

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“…This approach allows to simulate overvoltage pulses that occur as a result of lightning strikes, as well as switching overvoltages. A detailed description of the metrological equipment used in the practice of forming high-voltage voltage pulses is given in [3]. Although the use of Marx generators allows the generation of voltage pulses with sufficient amplitude levels and time characteristics that are satisfactory for practical purposes, the practical implementation of such schemes leads to certain difficulties, primarily due to the need to use a significant number of arresters [4].…”

Section: цель анализ влияния активного сопротивления первичной и втоmentioning

confidence: 99%

The Effect of the Active Resistance of the Pulse Transformer Windings on the Parameters of Voltage Pulses Generated on a Capacitive Load

Gurin¹,

Kostiukov²

2019

Elektroteh. elektromeh.

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Goal. Analysis of the influence of the active resistance of the primary and secondary windings of a pulse transformer on the voltage at the load capacitance based on the developed methodology for the analysis of transients caused by the discharge of the storage capacitance in the primary winding. Methodology. A model for calculating transients is developed using the Laplace transform. Transient modeling is carried out in the MATLAB software package. The results of transient calculations are compared with experimental results. Results. A method for calculating transients in test installations with pulse transformers has been developed, which allows taking into account the effect of power losses in the primary and secondary windings on the voltage at the load capacitance. The calculated relations are obtained, allowing to take into account the influence of the active resistance of the primary and secondary windings of the transformer on the voltage at the load capacitance, the currents in the primary and secondary windings of the transformer, as well as on the voltage drop on the inductance of the primary winding of the transformer. Scientific novelty. A mathematical model is developed for calculating transients in the primary and secondary windings of a pulse transformer, taking into account the influence of the active resistance of the windings when it changes over a wide range of possible values. Practical value. Using the proposed technique, it is possible to determine the parameters of the discharge circuit at which test voltage pulses are formed on the load capacitance without distorting the shape of the pulse front. References 14, figures. 5.

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“…Unfortunately, for the practical implementation of complex metrological tasks related to the simultaneous measurement of a number of components of the full pulse current of lightning in a powerful PCG of the UITOM-1 type, given in [20-22, 27, 28], materials and data on high-voltage measuring devices designed for simultaneous registration with the help of one meter, both HPC (with amplitude I mL of tens and hundreds of kiloamperes) and relatively weak pulse currents (with amplitude I mL of hundreds and tens of amperes) in a wide time interval of their flow in the discharge circuits of its series of parallel operating LPC (from units microseconds to hundreds of milliseconds), was not enough. In connection with this, the authors had to independently develop, create and modernize non-standardized highvoltage high-current meters of similar electric pulse currents, which are able to reliably register the necessary components of the pulse current of artificial lightning on the total electric R L L L -load when individual high-voltage LCG of this PCG is activated [16,17,29,30]. The powerful high-voltage PCG of the UITOM-1 type is equipped with several high-current meters (improved disk coaxial low-resistance shunts of the ShK-300 type) of artificial lightning pulse current components, the main technical characteristics of which are given in Table 3.…”

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confidence: 99%

“…Figure 14 schematically shows the design of the measuring high-voltage high-current shunt of the ShK-300M2 type in its longitudinal section. A significant difference between the improved designs of high-voltage high-current shunts of the ShK-300M1 and ShK-300M2 type [16, 29,30] from the ShK-300M shunt specified in [15] is the use of a highresistance manganin disc instead of a thin-walled (thickness h S ≈0.3 mm) disc. which is subjected to huge electrothermal and electrodynamic shocks measured in the discharge circuit of the LCG of powerful pulses of the full current of artificial lightning and from which the drop of the pulse voltage U S from the passage of the corresponding components of the pulse current of artificial lightning through it is removed, a disk with thickness of h S = (1-2) mm of stainless steel grade 12Х18Н10Т.…”

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Electrical engineering equipment for generating and measuring of complete pulse current of artificial lightning in the conditions of high-voltage electrophysics laboratory

Baranov,

Buriakovskyi

2024

Electrical Engineering & Electromechanics

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Goal. Decision of problem scientific and technical task on the reliable generating and measuring in the conditions of high-voltage electrophysics laboratory basic component of complete pulse current of artificial lightning with the rationed amplitude-temporal parameters (ATPs) with the use of the modernized generator of current of lightning of type of UITOM-1. Methodology. Bases of the applied electrical engineering, electrodynamics and electrophysics, electrophysics bases of technique of high-voltage and high pulse currents, bases of high-voltage pulse technique and measuring technique. Results. Information, which specify on a decision at Research and Design Institute «Molniya» of National Technical University «Kharkiv Polytechnic Institute» problem scientific and technical task, related to the reliable generating and measuring in the conditions of high-voltage electrophysics laboratory of complete pulse current of artificial lightning, which contains pulse A- (repeated pulse D-), intermediate B- and long-term C- (shortened long C*-) components of this current, is resulted, ATPs which answer the hard technical requirements of normative documents of the USA of SAE ARP 5412: 2013, SAE ARP 5414: 2013 and SAE ARP 5416: 2013. Short information is indicated about the applied electrical circuits of separate high-voltage generators of pulse currents of condenser type of GIC-A (GIC-D), GIC-B and GIC-C (GIC-C*), which it is worked as synchronous appearance on the general electrical loading in composition the modernized powerful high voltage generator of complete pulse e current of artificial lightning of type of UITOM-1, and in-use high-voltage measuring facilities which contain the heavy-current low-resistance shunts of type of SHK-300 for simultaneous registration with their help on examinee on stability to lightning devices objects of aviation and space-rocket technique of ATPs proper component of complete i pulse current of artificial lightning. Technical examples are resulted and the row of results of practical application of the indicated domestic powerful high-voltage proof-of-concept electrophysics equipment is described at the tests of elements of some aircrafts (ACs) on resistibility to the direct action on them of complete pulse current of artificial lightning with rationed ATPs. Originality. A problem is formulated and having the important applied value in area of aviation and space-rocket technique for the leading countries of the world scientific and technical task on the reliable generating and measuring in the conditions of high-voltage electrophysics laboratory indicated component of complete pulse current of artificial lightning with rationed ATPs and concrete electro-technological ways and hardware are indicated for its successful decision. Practical value. The use of the modernized powerful high-voltage generator of complete pulse current of artificial lightning of type of UITOM-1 developed in practice and created in Ukraine will allow to conduct the real verification on resistibility to the action of lightning of different side systems, devices and construction elements, containing metallic and composition materials, both again developed and modernized ACs, that will be instrumental in the increase of vitality of such ACs in the extreme terms of their flight and stay in an electrical active earthly atmosphere with flowing in it storm electrical discharges. References 30, tables 3, figures 20.

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The Metrology Support in Ukraine of Tests of Objects of Energy, Aviation and Space-Rocket Engineering on Resistibility to Action of Pulses of Current (Voltage) of Artificial Lightning and Commutation Pulses of Voltage

Cited by 4 publications

References 7 publications

Calculation and Experimental Determination of Critical Sections of Electric Wires and Cables in the Circuits of Devices of High-Voltage High-Current Pulse Technique

Calculation and Experimental Determination of Critical Sections of Electric Wires and Cables in the Circuits of Devices of High-Voltage High-Current Pulse Technique

The Effect of the Active Resistance of the Pulse Transformer Windings on the Parameters of Voltage Pulses Generated on a Capacitive Load

Electrical engineering equipment for generating and measuring of complete pulse current of artificial lightning in the conditions of high-voltage electrophysics laboratory

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