Empress Catherine II Saint-Petersburg Mining University, Saint-Petersburg, Russia

Yu. A. Sychev, Doctor of Engineering Sciences, Associate Professor, Sychev_yua@pers.spmi.ru
R. Yu. Zimin, Deputy Director, Candidate of Engineering Sciences
M. E. Aladin, Post-Graduate Student

The relevance of the problem of power quality maintenance in power supply systems in the mineral mining sector, including joint operation of centralized and autonomous power sources, is substantiated. The prospects of using the multifunction filter compensating devices based on active converters to ensure power quality in combined power systems are shown. The analysis of the efficiency of power quality maintenance by the multifunction filter compensating devices based on several active converters in the combined power supply systems of mines was carried out. The universal power quality regulator based on parallel and serial active converters is considered as the multifunction filter compensating device. The main function of the parallel active converter is to eliminate current harmonics and current reactive components. The main function of the serial active converter is to eliminate voltage harmonics, as well as voltage deviations and dips. The simulation model of the combined power supply system with linear and nonlinear loads, as well as the multifunction filter compensating device based on parallel and serial active converters, is developed. Based on the modeling results, the regularities are identified, that reflect the influence of the internal reactance of power supply on the efficiency of correction of power quality indicators by the proposed multifunction filter compensating device with the serial active converter equipped with the output passive filters of various configurations. The obtained regularities make it possible to properly configure the passive filters installed at the output of the serial active converter as a part of the multifunction filter compensating device to improve efficiency of power quality maintenance in the combined power supply systems for the given set of standardized and non-standardized indicators, including the level of voltage and current harmonics, voltage deviations and the level of the reactive component of current, with regard to power supply parameters.

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