Harmonic filters power supply non-linear loads

摘要

The invention relates to electrical engineering and can find application in power systems using a frequency converter for a submersible motor in the oil industry and other consumers with non-linear load. Filter harmonics AC power nonlinear loads comprises: blocking phase winding inductances 1-3, connected by their beginnings (or ends) to the respective inputs of the 4-6 filter; resonating the second winding 7-9, connected at their ends (or first) to the respective ends (or first) phase windings of the inductors 1-3 and the beginnings (or ends) to the respective first terminals of the capacitors 10-12, which form the first group; resonating third winding inductances 13-15 to the second terminals of which are connected first terminals of respective capacitors of the second group 19-24 (or 25-27). The second terminals of the capacitors of the first group of 10-12, depending on the version or bonded to the adjacent filter outputs 16-18 and to first terminals of the second group of capacitors 19-24 (or 25-27), respectively, or connected to the beginnings (or ends) adjacent second resonating coils 7-9 form a compound of capacitors in a triangle, or connected to the adjacent filter outputs 16-18, or connected to each other and form a star connection of capacitors. The second terminals of the second group of capacitors 25-27, depending on the version or attached to the second terminals of capacitors 10-12 of the first group of adjacent phases and form a delta connection of capacitors, or connected to each other and form a connection of capacitors in a star, or connected to the ends (or first) adjacent the second resonating coils 7-9. Placing the filter in each of the phases at one rod three phase magnetic core phase locking of the winding, the second and third resonating winding and a counter their inclusion reduces the amplitude of the harmonic components of the phase currents, and the connection of third resonating coils through the capacitors of the second group to the adjacent phases and performing a magnetic core so that it comprises two symmetrical magnetic circuits that combine all the rods, extends the range of variation of load currents by effectively suppressing Harmon iCal current components required to GOST values, thereby reducing weight and size characteristics of the filter and increases its reliability. 2 s.p.f., z.p.f. 7, 12 Fig.