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Application of an active rectifier used to mitigate currents distortion in 6-10 kv distribution grids

Записки Горного института
Фото © Форпост Северо-Запад / Андрей Кучеренко

ELECTROMECHANICS AND MECHANICAL ENGINEERING

Juan Manuel Munoz-Guijosa, PhD, Professor, Polytechnic University of Madrid, Madrid, Spain;

Sergei B. Kryltcov, Assistant Lekturer, Saint-Petersburg Mining University, Saint-Petersburg, Russia;

Sergei V. Solovev, Candidate of Engineering Sciences, Assistant Lekturer, Saint-Petersburg Mining University, Saint-Petersburg, Russia.

Abstract

The paper addresses issues of using the active rectifier in partially loaded variable frequency drive as active filter in the conditions of non-sinusoidal current and voltage disturbances caused by the presence of high-power nonlinear load in the grid. The topology of transformless three-level converter for 6-10 kV suitable for proposed solution
has been presented and its mathematical model has been de-rived. Based on the model, the direct power control algorithm with ability to compensate non-linear currents has been designed. The investigation of active rectifier efficiency was performed depending on the relation between linear and non-linear load currents of the grid node, as well as on active power load of the active rectifier. Efficiency analysis was based on the developed computer model of the grid node with connected non-linear load simultaneously with the variable frequency drive with active rectifier.

Keywords: tourmaline; typomorphism; indicator; cassiterite-quartz formation; cassiterite-silicate formation; greisens; tourmalinites; Verkhneurmiysky ore cluster; Far East.

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Scientifiс periodical «Zapiski Gornogo Instituta / Journal of Mining Institute» has been published since 1907 as a periodical scientific and scientific-educational edition in Saint-Petersburg Mining University. The periodicity of publishing is 6 volumes per year.