Power quality impact on performance and associated costs of three-phase induction motors

Abstract

This paper aims to prcsult investigation result3 related to inducton motors operation unda non ideal supply conditions. The motors are of squirrel cage type andthc non ideal cmditions are assaciated to harmonics, uubahces, voltage sag and swell, etc. a studies are carried Out using time domainmodeling and the SABER simulator. using this wmputatid result3 are derived in order to mpam the non ideal m o t o r p e r 6~ to the ideal ones 90 that the real supply umditiim effect upon the motor behaviorcanbehigblightcd In addition to te4Anical aspects, the powerquality impactonenergyandfinanciat wasteand isalso ddered.

A Fast Series Active Filter using Sliding Mode Control to Correct and Regulate Unbalance Voltage in Three-Phase System

“…The unbalance factor, UF is the ratio between the sum of zero sequence and negative sequence voltages v 0 +v 2 The poor quality power supply was imposed to the load in arbitrary cases, which possible occurs in real situation. The above results show good performance of the filter in dealing with all cases of the poor power supply, which were quantified by two factorss; MF and UF.…”

“…Voltage unbalance worsens the operation of AC electric machines. The negative sequence component in voltage unbalance causes large transient current that leads to reduction of the net torque, increase in losses and temperature rise [2] . These poor power qualities can degrade or damage the electrical equipment connected to the system.…”

Power Quality Improvement Using a Sliding Mode Control of a Series Active Filter

“…Voltage unbalance worsens the operation of AC electric machines. The negative sequence component in voltage unbalance causes large transient current that leads to reduction of the net torque, increase in losses and temperature rise [2] . Voltage sags and partial or total collapses of one or more phases are normally caused by faults on adjacent feeders such as phase to ground or phase to phase faults.…”

Operation of induction motor-drive under different voltage sag conditions

“…Because of the advantages of IMs (such as high speed, simplicity of maintenance, wide variation of speed), they have become more common in the industries. By developing power electronic, microcomputer technology and new control techniques, the usage of drives are promoted to supply IMs [2]. PQ problems affecting IM performance are harmonics, voltage unbalance, voltage sags, interruption etc.…”

“…PQ problems affecting IM performance are harmonics, voltage unbalance, voltage sags, interruption etc. Voltage sag is one of the most frequent PQ events which are common in recent distribution systems [2,3]. The behavior of IM under different voltage sag conditions is studied using simulation of an IM in Matlab environment [4].…”