RU2686301C1 - Shunting reactor with combined excitation (versions) - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and is used in electric power systems for compensation of reactive power. Reactor with application of DC and alternating current in power windings includes additional coils (3, 4), which intensify excitation. Coils (3, 4) are connected in series or in parallel to rectifier circuit (5).

EFFECT: reduction of weight and dimensions.

5 cl, 5 dwg

Description

The proposal relates to electrical engineering and is used in electrical systems.

The well-known and used scheme / 1 /, shunt reactor (hereinafter referred to as CSR), contains power inputs, bias windings connected to a thyristor rectifier. The disadvantage of such a device is complexity.

The prototype of the proposal for both options is CSR / 2 /, containing in each phase the first and second network windings, connected together by one output, and even and odd windings connected by two leads into two stars and the zero points of the stars form bias poles connected to the rectifier through two throttle, as well as two ballasts, grounded by one of the findings, and the second connected to the zero points of the stars. The disadvantage of such a device is the difficulty due to the need to connect two reactors between the rectifier poles and the zero points of the stars.

The technical problem solved by this invention is to simplify and reduce the weight and size.

The task is solved in the first embodiment due to the fact that the CSR is equipped with additional coils located on the same half-cores as the power windings and, accordingly, even and odd coils are connected in open triangles and are connected in series between the poles of the rectifier and the zero points of the stars.

The task is solved in the second version due to the fact that the CSR is equipped with additional coils located on the same half-cores as the power windings and, accordingly, even and odd coils are connected in open triangles and are connected in series between the rectifier poles.

The task is solved in the third version due to the fact that the CSR is equipped with additional coils located on the same floor of the rods as the power windings, and even and odd coils in each phase are connected in series and these circuits are connected to the rectifier poles.

The task is solved in the fourth version due to the fact that the CSR is equipped with additional coils located on the same half-cores as the power windings and, accordingly, even and odd coils are connected in open triangles and are connected between the rectifier poles and zero points of the stars.

The task is solved in the fifth version due to the fact that the CSR is equipped with additional coils located on the same half-cores as the power windings and, accordingly, even and odd coils are connected in open triangles and are connected between the rectifier poles and the second ballast terminals.

The drawing shows a scheme of CSR. Two groups of three-phase power windings 1 and 2, located on half-cores, form two star-type connections. Additional coils 3 and 4 are located on the same half-cores. There is also a controlled rectifier 5, powered by a transformer 6 and ballasts 7 (resistors, chokes, etc.) connected by a single terminal to ground 8.

CSR works as follows. It is a continuously adjustable three-phase inductance and is connected to high-voltage power lines and networks. Changing the direct bias current supplied by the rectifier 5 to the windings 1, 2, 3, 4, in a known manner, change the inductance of the CSR, and hence the reactive power consumed by the windings 1 and 2 of the CSR from the network.

Regulation of this current is provided not only by the magneto-motive force (ppm) of the direct current bias in the windings 1, 2, but also by the ppm. coils 3 and 4 by the current of the controlled rectifier 5. Coils 3, 4 in FIG. 1, 4 are connected in series to the rectified current circuit, and in FIG. 2, 3, 5 are connected in parallel to the rectifier 5. That is, there is both superimposed excitation through the working windings 1 and 2, and independent excitation by coils 3 and 4, which allows us to call the device with a combined excitation. Due to the placement of coils 3 and 4 on the same half-cores as windings 1 and 2, the current gain coefficient of CSR increases, in known devices it is usually 2/3. On the other hand, the leakage inductance of coils 3 and 4 play the role of a smoothing reactor (Fig. 1, 4). Moreover, this does not require an additional magnetic circuit.

Information sources:

1. Patent for the invention of the Russian Federation No. 2451353, cl. НРР 29/14, 27/26, 10.21.2010.

2. Patent for useful model of the Russian Federation No. 136919, cl. НРР 29/14, Н02Р 13/00, 07.17.2013.

Claims (5)

1. Shunt reactor with combined excitation containing a controlled rectifier and in each phase the first and second network windings are connected together by one terminal, the even and odd windings are connected by two terminals into two stars and the zero points of the stars are connected to ballasts grounded by the second terminals, different by the fact that it is equipped with additional coils located on the same half-cores as the power windings, and, accordingly, even and odd coils are connected in open triangles and included between the poles of the rectifier and the zero points of the stars. 2. Shunt reactor with combined excitation, containing a controlled rectifier and in each phase the first and second network windings connected by one output and the even and odd windings connected to two stars in the second terminals and the zero points of the stars are connected to the rectifier poles and ballasts grounded by the second conclusions, characterized in that it is equipped with additional coils located on the same half-cores as the power windings, and, accordingly, even and odd coils are connected in an open triangle and are connected in series between the poles of the rectifier. 3. Shunt reactor with combined excitation, containing a controlled rectifier and in each phase the first and second network windings connected by one output and the even and odd windings connected to two stars with the second terminals and the zero points of the stars are connected to the rectifier poles and the ballasts grounded by the second conclusions, characterized in that it is equipped with additional coils located on the same half-cores as the power windings, and even and odd coils in each phase are connected in series and these circuits Connected to the poles of the rectifier. 4. Shunt reactor with combined excitation, containing a controlled rectifier and in each phase the first and second network windings, connected together by one terminal, and even and odd windings connected by the second terminals into two stars, two ballasts grounded by the same terminals, characterized in that provided with additional coils located on the same half-cores as the power windings, and, accordingly, even and odd coils are connected in open triangles and are connected between the poles of the rectifier and zero points and stars. 5. Shunt reactor with combined excitation, containing a controlled rectifier and in each phase the first and second network windings, connected together by one terminal, the even and odd windings connected by two terminals into two stars and the zero points of the stars are connected to the poles of the rectifier, two ballasts grounded some conclusions, characterized in that it is equipped with additional coils located on the same half-cores as the power windings, and, accordingly, even and odd coils are connected in open triangles and both are connected between the poles of the rectifier and a second terminal of ballast.

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