The study of higher harmonics imported by a variable frequency converter of the AC engines

Abstract

Harmonic currents generated by power electronics based devices create serious power quality problems in facilities. This paper presents the results of the Asynchronous engine control via variable frequency converter and focuses on the network pollutions generated by this device. An analysis of measured values of voltage and current of 5^th and 7^th harmonics is presented. The study was conducted using an experimental simulation System for Monitoring of the Qualitative and Quantitative Indicators of Electricity Networks, equipped with two AC engines.