04-07-2012, 02:53 PM
Power Quality issue AND Harmonics
Power Quality issue .ppt (Size: 872 KB / Downloads: 897)
Definition
The term power quality means different things to different people .
Power quality is the interaction of electronic equipment within the electrical environment. This consists of generators, Transformers, breakers, wiring and grounding.
Good power quality would be a reliable supply of sinusoidal, 60Hz waveforms resulting in few operational anomalies.
Why is power quality so important
Power quality is an increasingly important issue for all electrical consumer .
Problems with powering and grounding can cause data and processing errors that affect production and service quality.
Power Quality problems
Definition.
P.Q. problems is any power problem manifested in voltage , Current ,or frequency deviation that result in failure or miss operation of Costumer equipment.
Surges and spikes (overpowering).
Harmonics ( current & voltage )
Voltage Fluctuations.
Voltage Fluctuations
Lights flickering? It could be the result of voltage fluctuations in your facility's electrical system.
High- and low-voltage conditions can result in equipment damage, data loss and erroneous readings on monitoring systems.
Overloaded power circuits are typically the cause behind under-voltage conditions.
Heavily loaded motors such as air conditioners can result in intermittent low voltages.
Less common but more damaging are over-voltage conditions, which can be seen in facilities that have rapidly varying loads.