1 / 22

Managing Harmonics – A case study Jim Bridgeman PFC Engineering

Managing Harmonics – A case study Jim Bridgeman PFC Engineering. Introduction. Basics of harmonic resonance Effects of harmonic resonance Typical solutions applied to resonant Power Systems Harmonic magnification case study. The Basics of Harmonic Resonance. Effects of Harmonic Resonance.

reece
Download Presentation

Managing Harmonics – A case study Jim Bridgeman PFC Engineering

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. Managing Harmonics –A case studyJim BridgemanPFC Engineering

  2. Introduction • Basics of harmonic resonance • Effects of harmonic resonance • Typical solutions applied to resonant Power Systems • Harmonic magnification case study

  3. The Basics of Harmonic Resonance

  4. Effects of Harmonic Resonance

  5. Effects of Harmonic Resonance

  6. Effects of Harmonic Resonance • Increased voltage distortion, possibly resulting in equipment malfunction • Loss of transformer output due to increased heating • Interference with communication systems • Premature failure of motors • Premature failure of power factor correction capacitors

  7. Typical Solutions Applied to Resonant Power Systems • Detuning reactors • Partial harmonic filtration • Full harmonic filtration

  8. Typical Solutions Applied to Resonant Power Systems – Detuning Reactors

  9. Typical Solutions Applied to Resonant Power Systems – Partial Filtration

  10. Typical Solutions Applied to Resonant Power Systems – Full Filtration

  11. Comparison of Harmonic Resonance Solutions

  12. Comparison of Harmonic Resonance Solutions

  13. Case Study – Harmonic Magnification at a Car Battery Factory • Large 5th harmonic magnification excited by 600 kVAr of capacitors • Costly installation of detuning reactors appeared to be the only solution • A more cost effective solution involving reconfiguration of the existing plant was found

  14. Case Study – Initial System Configuration (Transformer T1) • Plain capacitors • All non-linear loading • No load damping

  15. Case Study – Initial System Configuration (Transformer T2) • Nearly all linear loading • Significant load damping

  16. Case Study – Effects of 5th Harmonic Voltage Magnification

  17. Case Study – Effects of 5th Harmonic Voltage Magnification

  18. Case Study – Reasons for severity of 5th harmonic voltage magnification • High base level of harmonics due to all non-linear load being connected to this supply • Connection of plain capacitor banks • Total lack of harmonic damping from linear loading

  19. Case Study – Proposed Solution to Problem of Harmonic Magnification

  20. Case Study – Improvement in Harmonic Performance with Re-configured Load

  21. Case Study – Effects of 5th Harmonic Voltage Magnification

  22. Conclusions • Harmonic resonance can be caused by connection of Power Factor Correction equipment • Various methods of avoiding this scenario involving blocking / filtration systems are available • Careful examination of the problem and more appropriate load configuration can provide more cost effective solution to the problem Questions?

More Related