Journal ArticleDOI
Effects of harmonics on converter transformer load losses
TLDR
In this article, the authors measured short-circuit tests on a 262.5 MVA, three-phase, five limb converter transformer at various frequencies from 50 Hz to 1 KHz.Abstract:
Losses were measured during short-circuit tests on a 262.5 MVA, three-phase, five limb converter transformer at various frequencies from 50 Hz to 1 KHz. Using these and the calculated values of the harmonic currents produced by the AC/DC converter, load losses were determined. Variations of these losses with the converter firing angle, with the transformer reactance and with the load were studied. A simple method of loss calculation which has the potential for application at the design stage was developed. >read more
Citations
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Journal ArticleDOI
Power system harmonics research: a survey
TL;DR: A review of power system harmonics research and development can be found in this article, where the authors highlight the current and future issues involved in the development of quality and reliable electric power technology for future applications.
Journal ArticleDOI
Transformer design and application considerations for nonsinusoidal load currents
TL;DR: In this article, the Underwriters Laboratories Inc. (UL) K-factor rated dry type transformer and the recommended practices given in ANSI/IEEE C57.110 are reviewed.
Journal ArticleDOI
Evaluating harmonic-induced transformer heating
TL;DR: In this article, a heat run circuit was devised to produce harmonic rich load current on a 25 kVA oil-immersed distribution transformer, and the test was conducted at 100% of nameplate current using a purely resistive load, and a 2.4 ms current pulse.
Journal ArticleDOI
On the Effects of Solar Panels on Distribution Transformers
TL;DR: In this article, a two-step study on the effects of solar panel (SP) generators with inverters on distribution transformers via simulation and experiments is presented, where the authors quantified the amount of harmonic distortion caused by solar panels and associated inverters in distribution transformer, considering solar farms and rooftop residential installations.
Journal ArticleDOI
Bacterial foraging optimization and adaptive version for economically optimum sitting, sizing and harmonic tuning orders setting of LC harmonic passive power filters in radial distribution systems with linear and nonlinear loads
TL;DR: The bacterial foraging optimization (BFO) algorithm and its adaptive version to optimize the planning of passive harmonic filters (PHFs) and the results show that the proposed method is efficient for solving the presented problem.
References
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Journal ArticleDOI
Eddy-Current Losses in Rectifier Transformers
TL;DR: In this article, two methods are developed for evaluating the eddy-current losses occurring in a rectifier transformer during operation, i.e., when carrying pulsating currents, based on the analysis of the whole waveshape and the harmonic composition of current curves.
Journal ArticleDOI
Distribution Transformer Winding Losses Due to Nonsinusoidal Currents
TL;DR: In this article, the authors compare winding loss calculations from a finite element method with measured losses in single phase distribution transformers and test the principle of superposition of harmonic losses due to nonsinusoidal currents.
Journal ArticleDOI
Estimation of Loss of Life of Power Transformers Supplying Nonlinear Loads
TL;DR: In this paper, the impact of nonsinusoidal currents and voltages on the losses of power transformers is discussed and derating curves are explained. And a practical example is presented.
Journal ArticleDOI
For an Improved Evaluation of Conventional Losses of Transformers for Converters
TL;DR: In this article, the authors evaluate the conventional losses in rectifier transformers, as performed according to various national standards, and particularly as performed under International Electrotechnical Commission (IEC) recommendations.