Measurement of eddy-current loss coefficient P/sub EC-R/, derating of single-phase transformers, and comparison with K-factor approach

Fuchs, E.F.; Yıldırım, Deniz; Grady, W.M.

doi:10.1109/61.847243

Cited by 65 publications

(39 citation statements)

References 9 publications

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“…These losses are proportional to frequency and maximum flux density of the core and are separated from load currents. Many experiments have shown that core temperature increase is not a limiting parameter in determination of transformers permissible current in the non-sinusoidal currents [4,7,8]. Furthermore, considering that the value of voltage harmonic component is less than 5%, only the main component of the voltage is considered to calculate no load loss, the error of ignoring the harmonic component is negligible.…”

Section: 1mentioning

confidence: 99%

“…Skin effect and the most important phenomenon in creating these losses. In transformers windings, internal windings adjacent to core have more eddy current reason is the high electromagnetic flux intensity near the core that covers these Also, the most amount of loss is in the last layer of conductors in winding, which is due lux density in this region [4,8]: (5) th perpendicular to field line.…”

Section: Eddy Current Loss In Windingsmentioning

confidence: 99%

“…Also, the most amount of loss is in the last layer of conductors in wind to high radial flux density in this region [4,8 Here: τ = A conductor width perpendicular to field line. ρ = Conductor's resistance.…”

Section: Eddy Current Loss In Windingsmentioning

confidence: 99%

See 2 more Smart Citations

Computation Of Transformer Losses Under The Effects Of Non-Sinusoidal Currents

Gupta¹,

Singh²

2011

ACIJ

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Section: 1mentioning

confidence: 99%

Section: Eddy Current Loss In Windingsmentioning

confidence: 99%

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Computation Of Transformer Losses Under The Effects Of Non-Sinusoidal Currents

Gupta¹,

Singh²

2011

ACIJ

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“…R TRh consists of two parts such as the winding's dc resistance (R TRdc ) and the winding's equivalent resistance corresponding to the eddy-current loss (R TRec ) [5], [6]: Fig. 3 shows that single-phase circuit representation of the C-type filter.…”

Section: Modeling Of the Studied Systemmentioning

confidence: 99%

Optimal passive filter design for effective utilization of cables and transformers under non-sinusoidal conditions

Aleem

Balcı

Zobaa

et al. 2014

2014 16th International Conference on Harmonics and Quality of Power (ICHQP)

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Abstract-Transformers and cables have overheating and reduced loading capabilities under non-sinusoidal conditions due to the fact that their losses increases with not only rms value but also frequency of the load current. In this paper, it is aimed to employ passive filters for the effective utilization of the cables and transformers in the non-sinusoidal power systems. To attain this goal, an optimal passive filter design approach is provided to maximize the power factor definition, which takes into account frequency-dependent losses of the power transmission and distribution equipment, for the harmonically polluted systems. Obtained simulation results shows that the proposed approach has a considerable advantage on the reduction of the total transmission losses and the transformer's loading capability under non-sinusoidal conditions when compared to the traditional optimal filter design approach, which aims to maximize classical power factor definition. On the other hand, for the simulated system cases, both approaches lead to almost the same current carrying capability value of the cables.

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“…The total loss is consisted of dc transformer winding loss, winding eddy current loss and other stray loss since iron loss has been ignored in load operation [8].…”

Section: Winding Harmonic Modelmentioning

confidence: 99%

Research on Control Method of Inverters for Large-scale Grid Connected Photovoltaic Power System

Zhang¹,

Li²

2013

EPE

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A grid-connected inverter controlling method to analyze dynamic process of large-scale and grid-connected photovoltaic power station is proposed. The reference values of control variables are composed of maximum power which is the output of the photovoltaic array of the photovoltaic power plant, and power factor specified by dispatching, the control strategy of dynamic feedback linearization is adopted. Nonlinear decoupling controller is designed for realizing decoupling control of active and reactive power. The cascade PI regulation is proposed to avoid inaccurate parameter estimation which generates the system static error. Simulation is carried out based on the simplified power system with large-scale photovoltaic plant modelling, and the power factor, solar radiation strength, and bus fault are considered for the further research. It's demonstrated that the parameter adjustment of PI controller is simple and convenient, dynamic response of system is transient, and the stability of the inverter control is verified.

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Measurement of eddy-current loss coefficient P/sub EC-R/, derating of single-phase transformers, and comparison with K-factor approach

Cited by 65 publications

References 9 publications

Computation Of Transformer Losses Under The Effects Of Non-Sinusoidal Currents

Computation Of Transformer Losses Under The Effects Of Non-Sinusoidal Currents

Optimal passive filter design for effective utilization of cables and transformers under non-sinusoidal conditions

Research on Control Method of Inverters for Large-scale Grid Connected Photovoltaic Power System

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