THREE-PHASE MAGNETISATION-CONTROLLED REACTOR Russian patent published in 2012 - IPC H01F29/14 H01F27/26 

FIELD: electricity.

SUBSTANCE: reactor comprises an electromagnet part, converters with controlled rectifiers and supplied transformers according to a number of phases and a system of automatic control. The electromagnet part comprises a magnetic conductor with six rods, at least two for each phase of the circuit, with circuit windings, and control windings divided into parts, connected with inlets and outlets of converters. Parts of control windings in each phase of two rods are connected into four-armed bridges. Secondary windings of transformers are connected to inlet of controlled rectifiers, the outlets of which are connected with one diagonal of the bridge. The reactor comprises additional controlled rectifiers according to a number of secondary windings. Inlets of converters are connected with control windings of neighbouring phases, secondary windings of supply transformers are arranged with a different number of turns with the ratio of 1<w₂/w₁<10, where w₁ and w₂ - the number of turns of the secondary windings of the supply transformers. The technical result consists in increased reliability due to redundancy of a magnetisation system that reduces the time of reactor disconnection from the grid in case of scheduled revisions or repairs. Increased voltage at the outlet of the rectifiers for forcing due to increased number of the winding turns simplifies control of thyristor firing angles with the automatic control system.

EFFECT: reliability is increased by reduction of probability of a short circuit due to reduction of inputs at converters.

2 dwg