POWER QUALITY

Over the last thirty years or so, the amount of equipment containing electronics has increased dramatically. Such equipment can both cause and be affected by electromagnetic disturbances. A disturbance that affects a process control computer in a large industrial complex could easily result in shutdown of the process.

The lost production and product loss/recycling during start-up represents a large cost to the business. Similarly, a protection relay affected by a disturbance through conduction or radiation from nearby conductors
could trip a feeder or substation, causing loss of supply to a large number of consumers. At the other end of the scale, a domestic user of a PC has to re-boot the PC due to a transient voltage dip, causing annoyance to that and other similarly affected users. Therefore, transporters and users of electrical energy have become much more interested in the nature and frequency of disturbances in the power supply. The topic has become known by the title of Power Quality.


FOLLOWING FILE CONTAINS THE POWER QUALITY MAJORS.
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