FIELD: electrical engineering.
SUBSTANCE: according to the method, instantaneous values of currents are measured in the wires in the wires of two phases of the contact network connected to the windings of a three-phase transformer connected in a triangle, after the current measurement points, the generated currents opposite to the distortion currents are cut into the wires cut in parallel to those of the three-phase transformer windings connected in a triangle to which the phases of the contact network are connected. Next, the currents in the wires of the phases of the contact network are measured at points, after the points of current feed that suppress the distortion currents, the complex values of three additional currents relative to the base voltage for the current half-period of the first harmonic, over which sinusoidal instantaneous currents are formed, which are fed in the next period of the fundamental frequency into a cut of the wires connected in parallel to the three windings of the three-phase transformer connected in a triangle. For a power supply scheme for an asymmetric non-sinusoidal traction load of an AC railway from a three-phase network, a series of calculations were carried out. Values of the calculated instantaneous compensation currents are obtained, which in all modes provide sinusoidal, symmetrical and purely active three-phase currents of the traction load relative to the mains.
EFFECT: providing for joint compensation of reactive power, suppression of harmonic currents and balancing of traction load currents.
1 cl, 5 dwg
