RU2656380C1 - Controlled reactor (options) - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and is used in electric power systems. Reactor is designed in accordance with the scheme of two separate spiders, to the middle points of which the poles of the rectifier are connected.

EFFECT: new feature is the rectifier's power supply through the transformers from the taps of network windings.

5 cl, 4 dwg

Description

The invention relates to electrical engineering and is used in energy systems.

The well-known and applicable scheme / 1 / of a controlled reactor (hereinafter referred to as CSR) contains power inputs, magnetization windings connected to a thyristor rectifier, which is connected in phases to the valve winding of the transformer, the primary winding of which is connected to the reactor leads from the compensation windings. The disadvantage of this device is the complexity due to the need for many windings.

A prototype of the invention for both versions is a controlled reactor / 2 /, containing in each phase the first and second network windings connected by one terminal, and the even and odd windings connected by the second terminals and form magnetization poles connected to the rectifier, which is connected to the transformer in phases. The disadvantage of this device is its great complexity.

The technical result of the proposal is the simplification, reduction in weight and size.

The technical result in the first embodiment is achieved due to the fact that the CSR is equipped with a second rectifier and a transformer, rectifiers with poles are connected in parallel or in series, the primary windings of the transformers are connected to the taps of the corresponding first and second network windings. Additionally, transformers have a different connection group - even and odd.

The technical result in the second embodiment is achieved due to the fact that the CSR is equipped with a second transformer, the rectifier is made according to the six-phase star scheme, the primary windings of the transformers are connected to the taps of the corresponding first and second network windings. The technical result in the second embodiment is achieved due to the fact that the CSR is equipped with a second transformer, the rectifier is made according to the six-phase star scheme, and the primary windings of the transformers are connected to the solderings of the corresponding first and second network windings.

The technical result in the third embodiment is achieved due to the fact that the CSR is equipped with a second transformer, the rectifier is made according to the six-phase star scheme, and the primary windings of the transformers are connected to the solderings of the corresponding first and second network windings.

In the fourth embodiment, the achievement of the result is ensured due to the fact that the CSR is equipped with a second transformer and the primary windings of the transformers are connected to the tap of the corresponding first and second network windings, the secondary ones are connected in series and connected to the phases of the rectifier.

In FIG. 1, 2, 3, 4 shows the schemes of CSR. The CSR contains: the first network windings 1 and second 2, the magnetization poles 3 and 4, 5, 6 - transformers connected to rectifiers 7, 8 (Fig. 1) or one rectifier 7 (Fig. 2-4).

CSR works as follows. It is a continuously adjustable three-phase inductance and is connected to high-voltage power lines and networks. By changing the direct bias current supplied to the poles 3, 4, they change the inductance of the CSR, and hence the reactive power consumed by it from the network. The magnitude of the bias current is changed by adjusting the rectifier 7, 8. The circuit options are due to the difference in the possible circuits of the rectifiers used, and in an additional paragraph, the different connection schemes of the transformer windings 5, 6. In the latter case, interference in the network is reduced. Rectifiers are connected to points equipotential in direct current, which eliminates their magnetization. In the well-known CSRs, the rectifiers 7 (8) are powered from the compensation winding specially used in CSRs for this purpose. Such a winding complicates the design of CSR, and its effect on the harmonic composition of CSR currents is negligible. As shown in / 3 /, this winding practically does not affect the quality indicators of CSR. In the variants proposed here, the power supply of the rectifiers 7, 8 is made by alternating current from the solders of the network windings. Therefore, a special (compensation) winding can be discarded. The use of solders simplifies the design, reduces weight and dimensions.

Information sources

1. Bias-controlled shunt reactors. Dmitriev M.V. et al., Ed. prof. Evdokunina G.A., St. Petersburg: Publishing House. House "Rodnaya Ladoga", 2013, p. 79, Fig. 3.3.

2. RF patent for the invention No. 2562062, class. H01P 29/14.

3. www.cigre.ru> activity / session. 2014 Paris session. SPA2PS2. Fig. one.

Claims (5)

1. A controlled reactor containing in each phase the first and second network windings connected by one terminal together, and the even and odd windings connected by two terminals into two stars, and the common points of the stars form the magnetization poles connected to the rectifier, which is connected by phases to the transformer, characterized in that the controlled reactor is equipped with a second rectifier and a second transformer, rectifiers with poles are connected in parallel or in series, the primary windings of the transformers are connected to the solders, respectively first and second network windings. 2. A controlled reactor according to claim 1, characterized in that the transformers have a different connection group - even and odd. 3. A controlled reactor containing in each phase the first and second network windings connected by one terminal together, and the even and odd windings connected by two terminals into two stars, and the common points of the stars form the magnetization poles connected to the rectifier, which is connected by phases to the transformer, characterized in that the controlled reactor is equipped with a second transformer, the rectifier is made according to the six-phase star scheme, and the primary windings of the transformers are connected to the solderings of the corresponding first and second network windings OK. 4. A controlled reactor containing in each phase the first and second network windings connected by one terminal together, and the even and odd windings connected by two terminals into two stars, and the common points of the stars form magnetization poles connected to a rectifier connected to a transformer, characterized in that the controlled reactor is equipped with a second transformer, the rectifier is made in a ring circuit and the primary windings of the transformers are connected to the tap of the corresponding first and second network windings. 5. A controlled reactor containing in each phase the first and second network windings connected by one terminal together, and the even and odd windings connected by two terminals into two stars and the common points of the stars form magnetization poles connected to a rectifier connected to a transformer, characterized in that that it is equipped with a second transformer and the primary windings of the transformers are connected to the tap of the corresponding first and second network windings, the secondary windings of the transformers are interconnected in series are connected to the phases of the rectifier.

Images