Quick navigation
-- Power Quality Tutorial ---- 1. Power Quality Phenomena ------ 1.1 Harmonics ------ 1.2 Short interruptions (< 1min) ------ 1.3 Long interruptions (> 1min) ------ 1.4 Voltage dips and swells ------ 1.5 Transients, surges (switching, lightning) ------ 1.6 Flicker ------ 1.7 Unbalance ------ 1.8 Voltage value (long term undervoltages and overvoltages) -------- Overvoltages -------- Undervoltages ------ 1.9 Earthing and EMC ---- 2. Power Quality Problems ------ 2.1 Circuit breakers and RCD’s nuisance tripping ------ 2.2 Computers lock up ------ 2.3 Computers or other electronics are damaged ------ 2.4 Data loss ------ 2.5 Lights flicker, blink, or dim ------ 2.6 Loss of synchronization of processing equipment ------ 2.7 Motors or other process equipment malfunctions ------ 2.8 Motors or process equipment are damaged ------ 2.9 Noise interference to telecommunication lines ------ 2.A Relays and contactors nuisance tripping ------ 2.B Transformers and cables overheating ---- 3. Power Quality Solutions ------ 3.1 Back-up generator(s) ------ 3.2 Dynamic voltage restorers ------ 3.3 Harmonic filter (passive) ------ 3.4 Isolation transformers ------ 3.5 Line conditioners or active filters ------ 3.6 Multiple independent feeder ------ 3.7 Oversizing equipment and cables ------ 3.8 Shielding and grounding ------ 3.9 Static transfer switches ------ 3.A Static Var Compensator ------ 3.B Surge protectors on key pieces of equipment ------ 3.C Uninterruptible power supply (UPS) devices ------ 3.D Voltage stabilisers ---- 4. PQ phenomena and design issues
