THREE-PHASE FILTER COMPENSATING DEVICE Russian patent published in 2023 - IPC H02J3/01 

FIELD: electrical engineering; three-phase filter compensating device.

SUBSTANCE: three-phase filter-compensating device contains a compensated electrical network, a reactor, a capacitor made in the form of two-lead foil windings wound in series on the magnetic core rods in the form of separate sections, with the windings of each section isolated from each other by a layer of dielectric, and correction coils. The reactor is made in the form of a magnetic circuit of W-shaped rods, separated from each other by non-magnetic gaps of equal length. Double-lead foil windings in the form of separate sections are wound, one section per phase. The device contains six identical magnetic field correction coils, placed in pairs on the magnetic cores. In this case, a compensated three-phase electrical network is connected to the terminals of the beginning of the first correction coils, and the terminals of the ends of the first correction coils are connected to the terminals of the beginning of the first section conductors. The terminals of the ends of the first section conductors and the terminals of the beginning of the second section conductors are open, the terminals of the ends of the second section conductors are connected to the terminals of the beginning of the second correction coils. The terminals of the ends of the second correction coils are connected in a star configuration and are designed to be isolated when the device is connected to a compensated electrical network with an isolated neutral, or grounded when connected to a compensated electrical network with a solidly grounded neutral.

EFFECT: increase in the power factor by compensating for reactive power, reducing the coefficients, harmonic components of voltage and the total coefficient of harmonic components of the voltage of a three-phase electrical network while simultaneously increasing reliability.

1 cl, 2 dwg