Transformer efficiency and de-rating evaluation with non-sinusoidal loads
- 1 October 2012
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Energy efficiency with all its various aspects has been taken into consideration as the resources are diminishing at various rates. Improving the equipment efficiency is one of the major steps to get closer to ideal efficient use of energy in electric power systems. In this regard, transformer efficiency in distribution networks has been crucially studied over past decade. Advantages and disadvantages of various types of lamps including incandescent, fluorescent, Compact Fluorescent Lamps (CFL) and Light Emitted Diode (LED) from energy point of view have been debated quite effectively in the literature. Since the power utilities and their customers are showing an increased concern about the energy efficiency and power quality aspects, there are some mixed feelings towards recently introduced lamps. In this regard, harmonic distortion level initiated by extensive use of harmonic-generating lamps is considered. Vital electric characteristics of four lamp types will be explored. Then, transformer de-rating under non-sinusoidal condition from standard point of view is investigated. By using power quality analyzer, current harmonic levels generated by the abovementioned lamps are measured. Calculation and simulation of transformer loading while using each light as transformer load is performed, and finally effects of lamps on transformer de-rating is compared.Keywords
This publication has 10 references indexed in Scilit:
- Advanced transformer winding deformation diagnosis: moving from off-line to on-lineIEEE Transactions on Dielectrics and Electrical Insulation, 2012
- Aging of distribution transformers due to harmonicsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- A Frequency-Domain Harmonic Model for Compact Fluorescent LampsIEEE Transactions on Power Delivery, 2009
- Implications for Distribution Networks of High Penetration of Compact Fluorescent LampsIEEE Transactions on Power Delivery, 2009
- Corrected winding eddy-current harmonic loss factor for transformers subject to nonsinusoidal load currentsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Impact of using compact fluorescent lamps on power qualityPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Are Harmonic Recommendations According to IEEE and IEC Too Restrictive?IEEE Transactions on Power Delivery, 2004
- Reduction of the net harmonic current produced by single-phase non-linear loads due to attenuation and diversity effectsInternational Journal of Electrical Power & Energy Systems, 1998
- Transformer magnetizing current and iron-core losses in harmonic power flowIEEE Transactions on Power Delivery, 1994
- Aging of Electrical Appliances Due to Harnmonics of the Power System's VoltageIEEE Transactions on Power Delivery, 1986