Current Electromagnetic Compatibility Problems of High-Power Industrial Electric Drives with Active Front-End Rectifiers Connected to a 6–35 kV Power Grid: A Comprehensive Overview

Today, electric drive systems based on frequency converters with active front-end rectifiers (FC-AFEs) are widespread across industries. In the course of upgrade production facilities, such replace conventional thyristor- and diode-based rectifiers. FC-AFEs have following advantages: capacity to regenerate power grid operate at set factor. The manufacturers also claim that their products best electromagnetic compatibility (EMC) grid. EMC shall be achieved via a multilevel FC-AFE topology specialized pulse-width modulation (PWM) algorithms for AFE However, experience operating mid-voltage high-power drives an in 6–35 kV factory distribution grids non-linear response due resonant phenomena refutes claims manufacturers. Resonant caused by interaction inductance components (transformers, reactors) capacitance output cable lines. If resonance sufficient amplitude corresponds harmonic current consumed FC-AFE, will feature high-frequency voltage distortions. This may lead failures quality-sensitive electrical consumers. problem recurred various metallurgical companies. purpose this research is make comprehensive overview problems during operation as well analysis technical solutions aimed improvement