FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, in particular to electric power systems and can be used for switching on, off and continuous voltage control of transformer substations of all branches of power supply systems. Introduced are the main dual reactor, main and main-intermediate thyristor switches with double-sided current conductivity, where the main double reactor is connected between the power contactor and the additional double reactor and the connection point of the main thyristor switches, where the main thyristor switches are connected in phases between the main and additional double reactors and the point of connection of the power contactor to the input terminals, and the main-intermediate thyristor switches are connected in phases between the input terminals and the middle point of the main double reactor. Proposed technical solution allows to keep the voltage at the consumers at the nominal level at five levels of the supply mains voltage and (or) the active-inductive load current without creating non-sinusoidal voltage at the input and output of the power transformer of the substation: maximum, intermediate-maximum, rated, intermediate-minimum and minimum voltage level of the supply mains and (or) active-inductive load current. Proposed technical solution between the voltage levels of the supply mains and (or) current of the active-inductive load introduces two ranges of voltage regulation: upper and lower ranges. Between upper and lower ranges of voltage regulation are divided into two intermediate subranges: upper and lower subranges.
EFFECT: increase of voltage regulation limit to ±16%, as well as the possibility of providing switching on and off of the transformer substation at different levels of voltage of the supply network and (or) current of active-inductive load.
1 cl, 1 dwg
