A DETERMINATION OF THE FLUX DENSITY IN CORE OF DISTRIBUTION TRANSFORMERS, WHAT BUILT WITH THE COMMON USING OF GRAIN AND NON GRAIN ORIENTED MAGNETIC STEELS
Journal Title: Електротехніка і Електромеханіка - Year 2015, Vol 0, Issue 6
Abstract
Purpose. The development of calculation method to determinate the flux densities in different parts of the magnetic cores of distribution transformers, what built from different types magnetic steel (mixed core). Methodology. The method is based on the scientific positions of Theoretical Electrical Engineering – the theory of the electromagnetic field in nonlinear mediums to determine the distribution of magnetic flux in mixed core of transformer, what are using different types of steel what have the different magnetic properties. Results. The developed method gives possible to make calculation of the flux density and influence of skin effect in different parts of the magnetic cores of distribution transformer, where are used mix of grain oriented (GO) and non grain oriented (NGO) steels. Was determinate the general basic conditions for the calculation of flux density in the laminations from grain and non grain oriented steels of the magnetic core: the strength of magnetic field for the laminations of particular part of mixed core is the same; the sum of the magnetic fluxes in GO and NGO steels in particular part of mixed core is equal with the designed magnetic flux in this part of mixed core. Discover, the magnetic flux in mixed core of the transformer has specific distribution between magnetic steels. The flux density is higher in laminations from GO steel and smaller in laminations from the NGO steel. That is happened because for magnetic flux is easier pass through laminations from GO steel, what has better magnetic conductance than laminations from NGO steel. Originality. The common using of different types of magnetic steels in cores for distribution transformers gives possibility to make design of transformer with low level of no load losses, high efficiency and with optimal cost. Practical value. The determination of the flux density in different parts of magnetic core with GO and NGO steels gives possibility make accurate calculation of no load losses and magnetizing current of the transformer.
Authors and Affiliations
I. V. Pentegov, S. V. Rymar, M. I. Levin, A. V. Lavreniuk
Keywords
Related Articles
- EP ID EP299148
- DOI 10.20998/2074-272X.2015.6.05
- Views 91
- Downloads 0
AN ANTHOLOGY OF OUTSTANDING ACHIEVEMENTS IN SCIENCE AND TECHNOLOGY. PART 18: ROCKET ENGINEERING AND NEAR-SPACE EXPLORATION
A brief scientific and historical essay on the history of designing rocket technology and exploring near and outer space around the Earth is given.
MODEL BUILDING FOR CURRENT TRANSFORMER PAPER-OIL INSULATION STATE DIAGNOSTICS
A feedforward neural network based diagnostic model of oil-impregnated paper insulation of a current transformer has been developed. Its experimental validation as compared with a regression model has been performed.
SUBSTANTIATION AND GUARANTEEING OF TECHNOLOGICAL PARAMETERS OF TRIBOELECTRICAL METHOD OF MONITORING OF CABLES WITH POLYMER INSULATION.
The results of measurements of the contact potential difference of not shielded and shielded samples of cables with twisted pair without shielded chamber, inside a shielded non-grounded and grounded camera are presented....
AN INDUCTION SENSOR FOR MEASURING CURRENTS OF NANOSECOND RANGE
Purpose. A current meter based on the principle of electromagnetic induction is designed to register the current flowing in the rod lightning. The aim of the article is to describe the way of increasing the sensitivity o...
PROBLEMS IN TESTING DIGITAL PROTECTIVE RELAY FOR IMMUNITY TO INTENTIONAL DESTRUCTIVE ELECTROMAGNETIC IMPACTS. CONTINUATION OF THE THEME
The article is the continuation of the theme highlighted in the previous article with same title. The new article evaluates the results of digital protective relays (DPR) testing for immunity to the E1 component of High-...