Detecting Common Power Quality Issues

摘要

Voltage sags and swells are two of the most common power quality events. Voltage Sags and Swells cannot be prevented on the power system. As impedances change during the course of a day the voltage will momentarily change as well. The goal of power quality is to limit the number of sags and swells as well as the magnitude of these events such that they do not cause equipment malfunction or failure. The malfunction or failure of this equipment can cause large financial losses to various manufacturers. This paper will define the various types of Voltage Sags and Swells that occur and the effect they have on various types of equipment. Voltage Sags and Swells are defined in different manners based on their individual characteristics.