RT Journal Article SR 00 ID 10.31897/PMI.2019.2.229 A1 Muñoz Guijosa, Juan Manuel A1 Kryltcov, Sergei B. A1 Solovev, Sergei V. T1 Application of an active rectifier used to mitigate currents distortion in 6-10 kV distribution grids JF Journal of Minings Institute YR 2019 FD 2019-04-25 VO 236 SP 229 OP 238 K1 active Rectifier; active Filtering; harmonic disturbance; Direct Power Control AB 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 non-linear 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 derived. 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. PB Saint-Petersburg Mining University SN 2411-3336 LK https://oa.upm.es/63926/ UL http://pmi.spmi.ru/index.php/pmi/article/view/13190