FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to power electronics, and can be used in power supply systems for regulation or stabilization of three-phase voltage with improved energy indices. Proposed method consists in generation and summation of two additional three-stage extra voltages shifted relative to mains voltage in opposite directions by means of grid at the angle equal to one fourth of maximum step pitch. Technical result is achieved by increasing the number of control sub-ranges to 12 versus 6 in the prototype and increasing the frequency modulation frequency by 2 times without increasing the switching frequency. Proposed method as a more advanced one can replace existing technical solutions in high-voltage power supply systems.
EFFECT: improving accuracy of voltage equalization in electric networks and improving shape of additional voltage.
1 cl, 4 dwg
