28-12-2010, 12:42 PM
Puneet Kashyap
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INTRODUCTION
Power quality is a measure of how well electric power service can be utilized by customers.
The power quality is an electrical property that allows electrical systems to function in their intended manner without significant loss of performance.
Complexity of the system enables compromised quality of power.
Supply interruptions and low voltage levels are a constant source of concern for Indian consumers.
Parameters of Power Quality
Continuity of service.
Variation in voltage magnitude.
Transient voltages and over currents.
Harmonic content in the waveforms.
Transient Overvoltage
Transient over voltages are brief, high-frequency increases in voltage on AC mains.
Generally two different types of transient over voltages are observed:
a) Low frequency transients
b) High frequency transients (surges, spikes etc.)
