1 / 13

Paper-ID: 0755

Meyer, Jan Schegner, Peter Technische Universitaet Dresden Heidenreich, Kurt Vattenfall Europe Distribution Hamburg GmbH. Harmonic Summation Effects of Modern Lamp Technologies and Small Electronic Household Equipment. Paper-ID: 0755. Harmonic emission of mass-equipment.

kermit
Download Presentation

Paper-ID: 0755

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Meyer, Jan Schegner, Peter Technische Universitaet Dresden Heidenreich, Kurt Vattenfall Europe Distribution Hamburg GmbH Harmonic Summation Effects of Modern Lamp Technologies and Small Electronic Household Equipment Paper-ID: 0755

  2. Harmonic emission of mass-equipment • Main source in public LV grids:Power electronic converters of mass equipment • Level and frequency spectrum of emission depends on circuit topology • Manufacturer interest:Cost-effective production • Used circuit topology (especially for mass equipment) depends on limits/standards that apply(e.g. IEC 61000-3-2) Popular circuit topologies:

  3. Situation in public LV grids Probably preferred circuit technology: • No or „relaxed“ limitsfor illumination up to 25Welectronic equipment up to 75W • Tighter limits forillumination above 25Welectronic equipment above 75W Small eq. large eq. • Public LV grids: Mixture of mass-equipment with different circuit topologies and consequently different harmonic emission Actual status quo of harmonic cancellation in LV grids ? Influence of technology changes or shifts in equipment mixture ? Survey of individual emission of mass equipment and analysis of cancellation effects for 3rd and 5th harmonic

  4. Overview of measured equipment (1) • Total number of equipment:151 pieces • Lamps:74x CFL (P  25W)5x CFL (P > 25W)11x SSL (P  25W) • Electronic equipment:EE1 – 30x Office small (P  75W)EE2 – 18x Office large (P > 75W)EE3 – 13x Household small (P < 75W) • Large household equipment not yet considered • Scenario with dominating share of modern lamps -> analyse CFL impact CFL – Compact flourescent lamps SSL – Solid state lamps (LED) EE - (Other) electronic equipment

  5. Overview of measured equipment (2) Waveforms Total harmonic distortion • Different circuit topologies -> different waveforms and THDi values • Clear identification of different groups possible Lamps Office small Household small Office large

  6. No power factor correction (nPFC) – Type (c) Waveform 5th harmonic current • Small, high current peaks -> high harmonic content • Preferential phase angle of 3rd harmonic: 195 5th harmonic: 30 Office small Household small

  7. Cancellation effect of measured equipment 3rd harmonic current 5th harmonic current • Better phase angle diversity for 5th compared to 3rd harmonic • Different levels of cancellation effect for analysed equipment/lamp mixture at 3rd and 5th harmonic Lamps Office small Household small Office large

  8. Impact of changing technologies 5th harmonic current Cancellation effect • Best cancellation effect for CFL combined with passive PFC equipment • Virtually no contribution to cancellation effect of 5th harmonic by active PFC equipment No PFC (past) Passive PFC (today) Active PFC (future)

  9. Experiment at single family house 3rd harmonic current 5th harmonic current • Expected changes of harmonic vectors for CFL switched ON/OFF • ON/OFF comparison for 5th harmonic: Similar magnitudes (210mA), different phase angles (-40° -> 148°) -> Influence of CFL only identifiable by phase angle evaluation for this case !

  10. Historical development in one specific public LV grid 3rd harmonic current 5th harmonic current • Measurement on Saturdays in 1999 and 2010 for 2 load states: • No changes in consumer or network topology • Decrease of 5th harmonic, but increase of 3rd harmonic current • Phase angle shift: Indication for increased number of passive PFC equipment (technology change stipulated by 61000-3-2)

  11. Conclusions • Efficiency of cancellation effect differs for different harmonics. -> overall optimization • Future changes or adaptions of standards should always ensure a good effectiveness of cancellation effects-> force phase angle diversity • First grid measurement doesn‘t show dominating influence of modern lamps today (general conclusions not yet possible !).-> further development, installations with single type of equipment Next steps: • Long-term monitoring of low order harmonic currents (magnitude and phase angle) in different consumer structures -> identify possible changes in effectiveness of cancellation effect • Development of web-based database for exchange of measurement data with other research institutions-> improve efficiency of research in this field

  12. Thank you for your attention ! Contact details: Jan MeyerTechnische Universität DresdenInstitute of Electrical Power Systems and High Voltage Engenieering01062 Dresden tel. +49-351-463 35102fax. +49-351-463 37036 email: jan.meyer@tu-dresden.de

  13. Preferential phase angles of measured equipment 3rd harmonic current 5th harmonic current • Good cancellation between no PFC and passive PFC equipment; favorable phase angle of CFL • Cancellation effect more effective for 5th harmonic CFL No PFC Passive PFC Active PFC

More Related