Parallel operation of three-phase power transformers with different short-circuit voltages

Кузнецов, М. И.; Даденков, Д. А.; Dadenkov, S. A.; Dudarev, D. S.

doi:10.3103/s1068371217060098

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…The analytical method uses the magnetic circuit equivalent of the core and winding of the transformer, the calculation process takes into account the hysteresis characteristics of the core, and can evaluate the transformer excitation inrush current qualitatively, but the quantitative analysis is not accurate enough. The software simulation method is to apply Matlab, EMTP, finite element and other simulation software to model and simulate materials such as transformer core parameters, and then obtain the current of transient process, but it cannot be solved in real time [4][5].…”

Section: Introductionmentioning

confidence: 99%

Fast calculation and analysis of excitation inrush current peak of converter transformer under different remanence conditions

Wang,

Li,

Shu

et al. 2024

AETR

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In order to solve the problems of fixed model parameters and low efficiency in the traditional numerical method and software simulation method for transformer excitation inrush current. In this paper, the response surface fitting method is applied to the calculation of the excitation inrush current, which realizes the efficient calculation and analysis of the peak value of the excitation inrush current with the change of the closing Angle under the condition of different remanence of the main column. Firstly, the generation mechanism of transformer excitation inrush current was theoretically analyzed, and the key influencing factors were extracted. Secondly, parameter modeling is used to establish the converter transformer model in this paper. Finally, the response surface model between initial winding current, closing Angle and excitation inrush current peak was fitted by response surface test design, and the accuracy of the response surface was verified. It provides technical reference for the fast calculation and analysis of transformer excitation inrush current and the digital twin technology of power transformer.

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Section: Introductionmentioning

confidence: 99%

Fast calculation and analysis of excitation inrush current peak of converter transformer under different remanence conditions

Wang,

Li,

Shu

et al. 2024

AETR

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Electric drive of the generator of the diesel-electric tractor DET-250M2 on the basis of a Field Regulated Reluctance Machine

Kornienko¹,

Fediakov²,

Golykov³

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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The diesel electric tractor DET-250M2 was the first tractor in the USSR with an all-electric transmission. This tractor usually works in agriculture as a cultivator and a bulldozer. However, it is often used in the railway sector, in industry, in large construction projects. Since the tractor’s electrical installation developed in the 1950s on the basis of DC collector machines is now obsolete, difficult to maintain, it was decided to upgrade the traction electric drive. The article presents the calculations of an electric machine: optimization of the rotor geometry, selection of the optimal ratio of the pole and interpolar gap, selection of the optimal number of poles of the machine, selection of the current shape, type of rotor. As an electric machine, a FRRM, which characterized by high overload capacity, a wide range of work in terms of torque and speed, was selected.

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Control of energy-efficient electric drive of pumping stations

Platonov

Tsirkunenko

Bukhanov

2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The principles of pumping station control, providing the most efficient modes of operation are discussed in the article. To perform calculations of energy-efficient operation modes, a mathematical description of the system has been proposed. It is shown that the increase of energy efficiency in the system is achieved by choosing a power circuit, splitting up sections of the pumping station, selecting the appropriate operation algorithms for each of the sections. An electrical equivalent circuit of the control object is proposed. Comparison of the energy consumption of the pumping station was carried out for the following cases: in the first, the cascade did not work, and in the second, the flow was controlled in a cascade over the entire range of flow variation. It is established that the proposed control algorithms can significantly reduce energy consumption from the mains supply by about 30%.

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Parallel operation of three-phase power transformers with different short-circuit voltages

Cited by 6 publications

References 3 publications

Fast calculation and analysis of excitation inrush current peak of converter transformer under different remanence conditions

Fast calculation and analysis of excitation inrush current peak of converter transformer under different remanence conditions

Electric drive of the generator of the diesel-electric tractor DET-250M2 on the basis of a Field Regulated Reluctance Machine

Control of energy-efficient electric drive of pumping stations

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