Harmonics - A Major Power Quality Threat
Harmonics Analysis 1. Harmonics are the by-products of modern day power-electronics. 2. They are created by non-linear loads that draw current in abrupt pulses and generate bad current. 3. Non linear loads causes Harmonics, Non linear loads Inject harmonic current into AC mains . EQUIPMENTS THAT GENERATE HARMONICS: 1. Variable Frequency Drive (VFD) - Motors 2. Welding Machines 3. Equipment with Adjustable Speed Drives 4. Conveyor Systems 5. Equipment using SMPS 6. Battery chargers 7. UPS, Personal Computer 8. Laptops , Televisions. 9. Medical Equipments 10. Servers, storage devices 11. SMPS 12. Xerox machines, faxing machine 13. Computers , laser printers. 14. Led lighting's , CFL lamps , Electronic dimmers . 15. Motors 16. Power Transformers, Generators. 17. Arc welders , induction welders 18. Rectifiers, Inverters . 19. Induction heating . 20. Flexible AC transmission systems (FACTS) . 21. Air conditioning, HVAC systems . 22. Fluorescent lighting ,