An optimization approach to determining the power of active filters

Abstract

The coal grading plants in Vietnam extensively apply asynchronous motors with frequency control. They consume reactive power and non-sinusoidal current from the supply network. The nonsinusoidal currents and voltages lead to additional energy losses in electrical equipments, reduce their service life and cause an economic damage. Because of the low load power factor the companies with such plants pay penalties to power supply utilities. These problems can be solved by the active filters. The paper suggests an optimization algorithm to calculate the power of the active filter, which provides a load power factor corresponding to the normative documents and power quality indices corresponding to the standard requirements. The algorithm is used to calculate the power of the active filter for the coal grading plant owned by the company “Kua Ong-Vinakomin”.

Energy efficiency assessment of distribution networks

“…Figure 2 presents a classification of technical solutions that can reduce voltage and power losses in power transmission lines, increase the voltage level in load nodes and thereby increase the efficiency of distribution networks [15][16][17][18].…”

Some factors constraining the development and implementation of power grid voltage harmonics of filter-compensating installations

“…The development of the fundamentals of the filter compensating installations (FCI) design is an urgent task, which follows from the results of studying more than 50 publications [1][2][3][4][5][6][7][8][9][10][11][12] carried out over the past 15 years, mainly by the authors of three research teams in cities of Nizhny Novgorod, Krasnoyarsk and Irkutsk, as well as the new GOST (GOST -Russian National Standard) R 59032-2020 [13]. Attention should be paid to the fact that there are a number of factors that, to a certain extent, hinder the further development and implementation of higher harmonics of the power grid (PG).…”