Q1Power Quality and FACTS
Question
2 marks
Q.1. What are various power quality issues? [2]
Answer
Power quality issues refer to deviations of voltage, current, or frequency from their ideal sinusoidal, constant-magnitude, constant-frequency waveform, which cause failure or mis-operation of customer equipment.
- Voltage sag and swell (short duration RMS variations)
- Harmonics and waveform distortion (THD, notching, DC offset)
- Transients (impulsive and oscillatory)
- Voltage flicker (fluctuation from arc furnaces, welders)
- Voltage imbalance in three-phase systems
- Interruptions (momentary/sustained) and frequency variation