ADJUSTABLE SYMMETRICAL INSTALLATION OF ALTERNATING CURRENT TRACTION SUBSTATION Russian patent published in 2020 - IPC H02J3/26 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, in particular to adjustable filtering compensating installations of traction power supply system. Disclosed is an adjustable symmetrical installation of AC traction substation, comprising a first adjustable single-phase filter compensating unit connected in parallel to traction winding of step-down transformer, supplying arm with "lagging" phase ca voltage, current and voltage measuring transformers installed in each phase of transformer traction winding and on each arm of contact network power supply respectively, which secondary windings are connected to intelligent terminal, which performs the function of measuring electrical parameters of contact network. At that, it is equipped with the second adjustable single-phase filtering compensating unit with two poles, the first and second 27.5 kV switching switches with the input and output each and the design unit including two comparison circuits, two INHIBIT elements, NOR element and three actuators, wherein two first switching terminals are connected to first adjustable plant second terminal, outputs of which are connected to phases a and c traction winding of transformer, respectively, second pole is connected to phase b traction winding. Intelligent terminal is connected to the input of the first and second comparison circuits, the output of one of which is connected to the non-inverting input of the first INHIBIT element, inverse input of which is connected to the second comparison circuit, inverting input of the second INHIBIT element, non-inverse input of which is connected to the second comparison circuit and the first input of the NOR element, second input of which is connected to the second comparison circuit, and outputs of the first and second INHIBIT elements and NOR elements are connected to inputs of the first, second and third actuators, respectively.

EFFECT: technical result consists in improvement of reduction efficiency of currents and voltages unbalance caused by single-phase traction load of variable nature.

1 cl, 1 dwg