SU1292051A1 - Three-phase variable reactor - Google Patents

Abstract

The invention relates to These are electrical equipment, in particular, to three-phase adjustable resistors of a wide power class, designed for any permissible transformer voltage. The purpose of the invention is to expand the range of control of the reactor, as well as to simplify the manufacturing technology by increasing the maximum reactive power consumed by the reactor during the sub-stage, and using typical magnetic systems used in transformer construction. The active part of the device consists of three identical elements that are galvanically connected to each other. Each element is a flat laminated magnetic circuit consisting of four rods 1-4 and two pm 13 and 14. Pa. Each coil contains one coil with a large number of turns or two coils with a small number of turns of a three-phase working winding and one coil winding bias. The advantage of the invention is determined by the free magnetization regime on the even harmonics of the magnetic field. 2 Il. - SS

Description

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The invention relates to electrical engineering and can be used as a three-phase adjustable inductive impedance of a wide power class, designed for 5 any valid transformer voltage.

The purpose of the invention is to expand the control range, reduce power losses, and simplify the design and technology of fabrication of the reactor.

FIG. 1 shows a diagram of the connection and arrangement of the coils of one phase on the rods of the magnetic system

zy three-phase working winding and coils of one parallel branch of the bias winding; in fig. 2 is a diagram of the connection and arrangement on the rods of the three-phase winding and the bias winding.

A three-phase controlled reactor consists of a magnetic system, a three-phase working winding and a bias winding. The magnetic system is made in the form of three separate four-core flat magnetic cores, the rods 1-12 of which are laminated

overlapped with face rmami: top 13 and bottom 14.I

Each phase of a three-phase winding consists of two groups of coils, three coils in a group, one of which is located at the beginning and 35 others at the end of the phase: the ratio of the numbers of turns of the coils of each group is 0.577:: 1: 0.577 and each group of coils are connected in left and right zigzags, 40 and groups of coils are interconnected in series and counter. Of

The six coils of each phase of the three-phase winding are coil coils, marked with W, W, W, W symbols, 45, respectively, one on each rod of one separate four-core magnetic core, and two coils, designated by W, W symbols, are located one by one on the extreme 50 rods of another four-core magnetic circuit (Fig. 1). Thus, on each of the two internal rods of each individual four-core magnetic circuit, there is a single coil, labeled Wg, located on each of the two extreme cores, two coils, labeled W | vi, and belonging to

 five

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different phases of a three-phase winding

(Fig. 2). The bias winding coils are connected in three parallel branches, four coils in each branch (Fig. 1), with two pairs of coils of each parallel branch connected oppositely (point a on fix 1), and the coils within each of these two pairs of coils are interconnected according to. The points of the oncoming connection of two pairs of coils of each of the parallel branches of the bias winding are interconnected (points a, b, c in Fig. 2). The coils of one mutually according to the connected pair of coils of the parallel branch of the bias winding are located one on each of two internal rods of one separate the magnetic circuit, and the coils of the other pair are mutually according to the connected coils of the same branch, located one on each of the two extreme rods of another separate magnetic circuit (four coils, labeled Olami Wg in Fig. 1).

The proposed three-phase controlled reactor operates as follows.

Magnetic system magnetization by a constant magnetic field created by MDS Vg winding magnetization (Fig. 2) reduces magnetic permeability, steel, and hence the inductive resistance of phases AX, B-Y, C-Z of three-phase winding (Fig. 2). By changing the magnitude of the direct bias current 1, it is possible to regulate the resistance of the three-phase winding, the magnitude of the alternating current Ij flowing in it, and also the magnitude of the reactive power consumed by the reactor.

Expansion of the control range of the reactor is achieved by reducing the unmanaged reactive power consumed by the reactor at idle, as well as by increasing the maximum reactive power consumed by the reactor during biasing, since the described magnetic winding design provides a free magnetisation mode and even harmonics can be used. .

Simplification of the design and manufacturing technology is provided by the possibility of using typical magnetic systems used in transformer building,

The windings of the reactor are mutually inducible. In the controlled alternating current flowing in the three-phase winding, except for the first harmonic, only 11- and 13-harmonics are contained, whose amplitudes are small. At the terminals + and - of the bias winding, only 12 harmonic EMF takes place, the amplitude of which is also negligible.

Claims (1)

Invention Formula A three-phase controlled reactor containing a twelve-rod magnetic system, on different rods of which there are coils of a three-phase alternating current winding made of a conductive material, mainly of an alternating foil-dielectric composition, each phase of a three-phase winding consisting of two successively connected coil groups with a ratio of numbers turns of coils in each coil group of 0.577: 1: 0.577, bias windings are installed on the rods of the magnetic system, each oh on each rod concentrically aligned with the coils of three-phase alternating current windings, characterized in that, with a view to adjusting the spreading range, reducing losses cardinality five As well as simplifying the design and manufacturing technology of the reactor, the magnetic system of the reactor is made in the form of three separate four-rod flat laminated magnetic conductors; six coils of two phases of three-phase winding are located on the rods of each individual magnetic core; the number of turns in each coil belonging to the same phase are located one at each of the two internal rods, two coils with a smaller number of turns belonging to this -5 same phase are located one at each ohm of two extreme rods, where one of two coils with a smaller number of turns belonging to the other phase is also located, two biasing coils located on two internal rods of one separate magnetic conductor and two biasing coils located on two extreme rods of another separate magnetic pipeline , are connected in series and form one parallel branch of the winding of iodomagnification, and on each separate magnetic circuit the specified pair of coils is turned on, and every two pairs of coils-ec and separate magnetically different wires incoming to one parallel branch are included counter, and counter-point connection between two pairs of coils kalsdoy parallel branch across the bias winding are interconnected. AT 0 five 0 I 1C 2 VNIISH1 Order 277/51 Circulation Produced-polygr pr-tne, i. Uzhgorod, st. Project, 4 Subscription