Methods Comparation and Simulation of Transformer Harmonic Losses

Li, Pei; Li, Guodong; Xu, Yanchun; Yao, Shujun

doi:10.1109/appeec.2010.5448566

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…According to [50], with a 10% harmonic distortion of a fifth-order harmonic, a power transformer can increase the loss by 10% compared to the absence of current harmonics. The IEEE [51] has proposed a recommended practice for estimating the loss of oil-filled transformers due to current harmonics.…”

Section: Power Qualitymentioning

confidence: 99%

Design of IOT-Based Framework for Evaluation of Energy Efficiency in Power Transformers

et al. 2023

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Two prototypes with energy efficiency calculations have been developed to enable real-time efficiency assessment and data collection. The results of the experiment demonstrate that the use of microprocessor technology and the Internet of Things can significantly improve the efficiency and accuracy of energy audits in power transformers. The prototypes developed in this study provide real-time efficiency assessment and data collection, enabling more effective energy management and cost savings for industrial users. During the experiment, it was found that resonance can cause the same losses as a poor power factor of the system, highlighting the importance of addressing energy quality issues in addition to energy efficiency. These findings have important implications for energy efficiency policies and practices in the context of climate change mitigation and rising energy prices.

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Section: Power Qualitymentioning

confidence: 99%

Design of IOT-Based Framework for Evaluation of Energy Efficiency in Power Transformers

et al. 2023

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“…Many studies on measurements and effects of harmonics have been done in the past and in recent years [5][6][7][8][9][10][11][12][13][14][15][16][17]. However, there are not enough studies that model a large distribution system via harmonics or other power quality problems.…”

Section: Introductionmentioning

confidence: 99%

Harmonics in Electric Distribution Systems

Sallam

Malik²

2011

Electric Distribution Systems

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In this study, measurements were taken at different points of a sample distribution system in order to analyze the levels of harmonics that appear as a day-to-day increasing problem in electrical distribution systems. According to the measurement values, the dominant harmonics have been determined and an electrical model of the system has been prepared using the SimPowerSystems toolbox from MATLAB and Simulink. The accuracy of the electrical model has been verified by the measurement and simulation values. In addition, the transformer connection types' and impedances' simulations have been presented to understand and solve the harmonic problems in electrical distribution systems. With the help of this study, advanced analysis can be performed in the electrical distribution system for power quality analyses and this study can be a background for similar kinds of simulation studies.

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“…The excitation resistance coefficient reaches 3.932 in the 13th harmonic. In [31,32] the advanced T-equivalent circuit method in Figure 6 was compared with an experimental measurement method. Results have demonstrated they can be consistent with each other within a certain error range, so the advanced method can be applied to the harmonic loss calculation of traction transformers.…”

Section: Harmonic Loss Of Transformermentioning

confidence: 99%

Harmonic Loss Analysis of the Traction Transformer of High-Speed Trains Considering Pantograph-OCS Electrical Contact Properties

et al. 2013

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Abstract:The traction transformer of the traction drive system of a high-speed train is one of the main equipments for energy conversion. The transformer loss will be increased by load harmonics and pantograph arcs at high speed. It is very important to predict losses for the improvement of traction transformer design. In this paper, a dynamic model of the pantograph-catenary system is established using the MSC.Marc software based on the finite element method to analyze disconnection events in different speeds. Then the pantograph arc, traction transformer and four-quadrant converter model is set up. Resistance variations with the change of harmonic frequency have been considered in the calculation formulae of harmonic losses. Traction transformer losses can be calculated based on the harmonic T-equivalent circuit and superposition principle. Considering the harmonic losses variations, the effects of arc voltage on harmonic copper loss and harmonic core loss are analyzed, respectively. The average loss at different disconnection ratios is also calculated. This method could be used to estimate the increment of transformer harmonic losses with poor current conditions at high speed.

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Methods Comparation and Simulation of Transformer Harmonic Losses

Cited by 9 publications

References 2 publications

Design of IOT-Based Framework for Evaluation of Energy Efficiency in Power Transformers

Design of IOT-Based Framework for Evaluation of Energy Efficiency in Power Transformers

Harmonics in Electric Distribution Systems

Harmonic Loss Analysis of the Traction Transformer of High-Speed Trains Considering Pantograph-OCS Electrical Contact Properties

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