Harmonics, power factor correction and transient overvoltage analysis in a stainless steel cold rolling mill plant system caused by voltage sags

摘要

This paper presents guidelines for analyzing harmonics, power factor correction and transient overvoltage in a stainless steel cold rolling plant using sendzimir cold rolling mill process. This rolling mill loads operate at a wide range variationof power factors and reactive power that results in penalty to charges and bus voltages variation. In addition, the nonlinear characteristics of the rolling mill drives cause significant harmonic currents flowing through the plant and utility powersystem. These harmonic currents result in system voltage distortion and power loss in the system. The measurement of voltage and current auto reclosing supply voltage during power line disturbances has been performed. Voltage sag and short interruptionoccurrence often exist in such case study. The extended analysis of results may lead to identify problems and possible correction measures.