Test of the method for calculation of derating of workshop transformers on engineering plants

International Conference on Mechanical Engineering, Automation and Control Systems 2016

机械制造;无线电电子学;计算机科学

Shklyarskiy, A.Y.^1 ; Bardanov, A.I.^1

Saint-Petersburg Mining University, 2, line 21, St Petersburg

199106, Russia^1

关键词: Adjustable speed drives;    Current harmonics;    Engineering plant;    Equipment efficiency;    Feeding voltage;    High harmonics;    Math model;    Transformer derating;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/177/1/012054/pdf
DOI  :  10.1088/1757-899X/177/1/012054

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Today's innovations in engineering production are aimed at the improvement of equipment efficiency in order to reduce losses and to save environment. It is conventional that the adjustable-speed drive improves electrical and mechanical transients of workshop units, but power electronics' devices are current harmonics sources. Presence of high harmonic currents in the workshop's network is a substantial reason for transformer derating. The article discloses the method approbation, the method for calculating additional losses in an idle transformer for non-sine feeding voltage. The approbation was carried out via comparing the calculated data with the experimental data. The article describes the studies method, its strong and weak sides, and it also presents the actual calculation of coefficients for a math model, when calculating losses in a transformer, based on existing experimental data. The conclusion comprises the observation regarding possibility to use the method described to solve practical tasks.