Justification for creating a mobile complex to assess electric energy loss in power transformers during the operation process

A V Vinogradov,V E Bolshev,M O Ward,A V Vinogradova,N V Makhiyanova,L V Dolomaniuk,E.V Shamsutdinov,V.V Sergeev,Yu.V Vankov

doi:10.1051/e3sconf/201912402009

A V Vinogradov, V E Bolshev + Show 7 more

Open Access

https://doi.org/10.1051/e3sconf/201912402009

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Abstract

The paper analyzes the statistical data on the transformers of the Kromsky branch of Oreloblenergo OJSC including the average lifetime of the transformers and no-load losses measured in accordance with the requirements of Russian standard GOST 3484.1. The analysis indicates that the declared passport data differ from the measured data. There is also the analysis of technical solutions to improve the power transformer design including to development of new types of electrical steel used in transformer cores, superconducting materials for winding. The article gives an understanding of the advantages and disadvantages of using these technologies as well as the possible reduction of electrical losses. In conclusion there is the justification for creating the mobile measuring complex to assess electric energy loss in power transformers during operation without disconnecting the load. The paper describes the result achieved using such a mobile measuring complex along with the economic effect of creating the project.

Highlights

A large number of power transformers with a standard service life are in operation in rural distribution networks [1]
It was assumed that no-load losses for the entire service life (35-40 years) in serviceable transformers increased by no more than 5% compared with the results obtained during factory tests
To assess the statistical data on the transformers of the Kromsky branch of Oreloblenergo OJSC, the no-load losses of transformers were measured in accordance with the requirements of GOST 3484.1

Summary

Introduction

A large number of power transformers with a standard service life are in operation in rural distribution networks [1]. No-load losses increase during operation of power transformers. The works [6, 7] show that, in reality, the no-load losses in transformers increases to a greater degree. These losses are a source of increased costs for electric grid organizations to pay for electric power losses. Existing methods to assess the no-load losses of power transformers do not allow to conduct this survey without disconnecting the load [1]. It is necessary to develop new methods for estimating noload losses making it possible to carry out a rapid assessment without removing the load from the transformer, avoiding unreasonable the power supply interruptions for electricity consumers

Statistics

Review of ways to improve the design of transformers

Findings

Conclusions