Survey on Voltage Stability

Abstract

Power quality has a vital role lately because of the impact on electricity suppliers, equipment manufacturers and customers. Power quality is described as the variation of current, voltage and frequency in a power system. It mentions to an extensive type of electromagnetic (EMI) phenomena, which describes the current and voltage at a given time and at a given locality in the power system. Currently, there are several industries exploiting technology for processing units and manufacturing. This technology needs higher quality and consistency of power supply device. The industries like equipment of manufacturing units, semiconductors, computers, etc. are very sensitive to the changes of quality in power supply. Power quality (PQ) difficulties encompass an extensive range of disturbances network such as impulse transient, voltage, harmonics distortion, sags/swells, flicker, and interruptions. Voltage swells/sags can happen mainly than dissimilar PQ phenomenon. These voltage swells/sags are essentially the most undesired power problems in the vigor distribution network. The objective and scope of this paper is the study of power quality (PQ) occurrence in distribution systems.