Current Harmonic Compensation for electrolytic process using series active scheme. http://dx.doi.org/10.1049/iet-pel.2012.0057

Abstract

A series active filter to compensate current harmonics injected by high power rectifiers (such as in copper electrowinning and electro-refining processes) is presented and analyzed. The proposed current harmonic compensation method is accomplished by injecting a corresponding series voltage distortion at the rectifier ac terminals. The distorted ac voltage generated at the high power rectifier ac terminals forces the line current to be sinusoidal and increasesdc voltage distortion, but it does not affect the electro-winning or electro-refining processes. A complete design procedure for the series active system is presented. In conjunction with simulated results obtained from a 10 MVA copper electro-winning facility, a 2 kVA laboratory prototype is used to validate the current harmonic compensatorscheme. The results obtained through simulation and from the experimental prototype confirm the viability of the proposed compensator and associated control strategy.