|
Managing Harmonics – a case study Jim Bridgeman pfc engineering Introduction
|
| Date | 22.05.2021 | | Size | 0.59 Mb. | | #56715 |
| Power-Factor-Correction-Harmonic-Filters Introduction - Basics of harmonic resonance
- Effects of harmonic resonance
- Typical solutions applied to resonant Power Systems
- Harmonic magnification case study
Effects of Harmonic Resonance Effects of Harmonic Resonance 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
- Detuning reactors
- Partial harmonic filtration
- Full harmonic filtration
Typical Solutions Applied to Resonant Power Systems – Detuning Reactors Typical Solutions Applied to Resonant Power Systems – Partial Filtration Typical Solutions Applied to Resonant Power Systems – Full Filtration Comparison of Harmonic Resonance Solutions Comparison of Harmonic Resonance Solutions 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
Case Study – Initial System Configuration (Transformer T1) Case Study – Initial System Configuration (Transformer T2) - Nearly all linear loading
- Significant load damping
Case Study – Effects of 5th Harmonic Voltage Magnification Case Study – Effects 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
Case Study – Proposed Solution to Problem of Harmonic Magnification Case Study – Improvement in Harmonic Performance with Re-configured Load Case Study – Effects of 5th Harmonic Voltage Magnification 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?
Share with your friends: |
|
|
