ACTIVE FILTER OF HIGHER HARMONICS OF CURRENTS OF THREE-PHASE NETWORK Russian patent published in 2018 - IPC H02J3/01 H02M1/12 H02M1/15 

FIELD: electricity.

SUBSTANCE: invention relates to power engineering, it can be used as a device for compensation of harmonic distortion of currents of a three-phase network. Active filter of higher harmonics of currents of the three-phase network has a three-phase bridge voltage inverter on IGBT transistors 1–6 with counter-parallel diodes 7–12, inlet filter chokes 15–17, direct current capacitor 13, voltage sensors for measuring instantaneous values of mains voltage 20–22, load current sensors 23–25, active filter current sensors 26–28, capacitor voltage sensor in DC circuit 18, ramp generator 31, control system units 32–34. Due to the introduction of capacitor 14, voltage sensor 19, current sensor 29, as well as the implementation of the control system units according to the principles of combined control, active filter of higher harmonics of currents is obtained, which compensates for non-sinusoidal nature of currents and reactive power of the nonlinear load having small weight and size parameters. In addition, it can be used as a rectifier with a stabilized voltage for its own consumer. As its own consumer, battery pack, relay protection elements and information electronics can act.

EFFECT: technical result to which the claimed invention is directed is the creation of an active filter of higher harmonics of currents of a three-phase network that compensates for the non-sinusoidal nature of currents and reactive power of the nonlinear load having small weight and size parameters.

1 cl, 1 dwg