Possibility of electric field compensation of external isolation of high-voltage gas-insulated current transformers
Journal Title: Вісник Національного технічного університету "ХПІ". Серія: Проблеми удосконалювання електричних машин і апаратів. Теорія і практика - Year 2018, Vol 32, Issue 1308
Abstract
There have been proposed methods of intensity distribution regulation along external isolator of gas-filled current transformers. This method allows us to estimate the efficiency of the distribution of forced voltage using capacitor plates by changing their design parameters. On the structure of the tire there is a cavity, where the internal passage of the current carrying the particles and grounded elements of the design of the transformer current. Such a constructive solution enhances the distortion of the electric field and forms a sharp uneven voltage distribution and field strength along the insulation structure. In the offered methods the column from sequentially connected insulators is considered, the principal circuit elements of substitution selected a certain capacity of a separate part of the reference isolation center and its partial capacities on the earth and conductive elements. Thus, we can say that to improve the voltage distribution and reduce the heterogeneity of the electric field by controlling the structure of the capacitor. Different variants of constructive decisions for forced equalization of voltage distribution are analyzed, especially in the upper part of the tire near a powerful electrode. The structure analysis showed that the following structural parameters influence on the distribution of capacitance and field strength along the capacitor height: the length of the overlap of the capacitor plates, the length of the capacitor plates and the distance between the individual capacitor plates. The results of the preliminary estimation of the field intensity distribution are shown in the figure. On the basis of this methodology, software was developed that allows us to estimate the strength of the field at individual points along the height of the cylindrical condenser. Thus, it was concluded a possibility of improving of intensity distribution regulation and reduction of non-uniformity of an electric field.
Authors and Affiliations
L. B. Zhorniak, A. I. Afanasiev, Vitalii Snigirev, Svetlana Skoryk, Denys Chornyi, Serhii Bieliaiev
Keywords
Related Articles
- EP ID EP494180
- DOI 10.20998/2079-3944.2018.32.04
- Views 111
- Downloads 0
Analysis of the recuperative braking working mode in imitaning model of the switched reluctance motor
Modeling transients from the motor to recuperative braking operation by Simulink of the Matlab software package is got up for the switched reluctance motor. The developed imitating models and computing dates are resulte...
Step voltage converter as an alternative source for magnetic pulse metal working systems and induction heating systems
The use of preliminary induction heating of the working zone of magnetic-pulse sheet metals working can improve its efficiency and expand the existing range of technological operations for contactless metal working. Inte...
Analysis of design features of shielded inductive current limiter with high-temperature superconductivity
The principle of operation and design of a shielded high-temperature superconducting short-circuit current limiter of inductive type are considered. Comparative analysis of the design features of current limiters with hi...
To the question of improving the quality of internal insulation of high-voltage measurement transformers
In this paper, the issues of increasing the reliability of electrical insulation of high-voltage measuring transformers, which are in operation in various power supply systems, and methods for increasing the service life...
Investigation of electromagnetic processes in a semiconductor converter with seven-zone regulation of output voltage and electromechanical load
New mathematical models of the electromagnetic processes in three-phase electric circuits of the semiconductor converters with many-server zoned regulation of phases voltages disregarding losses in semiconductor commutat...