A Review of Transformer Losses (original) (raw)

Environmental Cost of Transformer Losses for Industrial and Commercial Users of Transformers

North American Power Symposium (NAPS), 2011

Improvements in energy efficiency of electrical equipment reduce the greenhouse gas (GHG) emissions and contribute to the protection of the environment. This paper proposes a simplified model that quantifies the environmental cost of transformer losses and incorporates it into the economic evaluation of distribution transformers for industrial and commercial users of transformers. This environmental cost is coming from the cost to buy GHG emission credits because of the GHG emissions associated with supplying transformer losses throughout the transformer lifetime. Application results indicate that the environmental cost of transformer losses can reach on average 35% of transformer purchasing price for high-loss transformers. That is why it is important to incorporate the environmental cost of transformer losses into the economic evaluation of distribution transformers.

Design and Analysis of Losses in Power Transformer

This paper examined and presented a simplified approach to power transformer design. Analyzed possible losses associated with power transformers through computational techniques and crucial design diagram.

Reduction of Power Grid Losses by Using Energy Efficient Distribution Transformers

Journal of Materials Science Forum, vol. 721, pp. 269-274, 2012

The importance of distribution transformer no-load loss on the operation of modern electrical grids is often underestimated. Internationally, distribution transformer no-load loss constitutes nearly 25% of the transmission and distribution losses of electrical grids. The losses in European Union distribution transformers are estimated at about 33 TWh/year whereas, reactive power and harmonic losses add a further 5 TWh/year. In the Greek electrical grid the no-load losses of 140,000 distribution transformers are estimated at about 490 GWh/year. This paper has two goals the first one is to illustrate the significance of distribution transformer no-load loss in periods of high electric energy cost and the second goal is the presentation of a novel numerical methodology for wound core transformers no-load loss analysis, enabling to determine the economically and technically optimum transformer for every use.

Analysis of The Effects of Different Frequency Values on The Loss of Transformers

International Journal of Engineering and Applied Sciences, 2020

Accurate simulation and loss estimation in power transformers are crucial for both the design phase and useful life of the transformer. In this study, core losses and magnetic flux densities of a power transformer for different frequency values are calculated. For this, ANSYS @ MAXWELL software based on the Finite Elements Method (SEY) and the 3D simulation model of the transformer were examined. The results obtained from simulations performed at 50 Hz and 60 Hz frequencies were compared with theoretical and experimental results. It has been observed that increasing the frequency causes increased heat and loss in the core of the transformer.

Reducing Losses in Distribution Transformers

IEEE Transaction on Power Delivery, 2003

This paper examines three methods of reducing distribution transformer losses. The first method analyzes the effects of using aluminum electromagnetic shields in a distribution transformer. The goal of placing electromagnetic shields in the distribution-transformer tank walls is to reduce the stray losses. A 500-kVA shell-type transformer was used in the experiments. The overall results presented indicate that stray losses can be considerably reduced when electromagnetic shielding is applied in the transformer tank. In the experiment, the tank walls were lined with aluminum foil. The possibility of reducing the dielectric losses was shown through experiments in the second method. And the third method of this work analyzes the behavior of wound-cores losses in distribution transformers, as a function of joint configuration design parameters. The joint configuration used in this paper is called step-lap joint.