CN112103051A - Gas-insulated single-stage iron-core reactor - Google Patents

Abstract

The invention relates to a gas-insulated single-stage iron-core reactor, which is characterized in that it includes a high-voltage insulation module, an iron-core module and a supporting insulation module; a single-stage structure is adopted in the invention, and an epoxy strip is provided in the high-voltage coil to support to form an air channel , improve the heat dissipation performance; high-voltage shielding cover and low-voltage shielding plate are used to equalize the external electric field of the high-voltage coil, the conductive tube and the voltage-equalizing electrode in the insulating sleeve are used to improve the internal electric field of the insulating sleeve, and the voltage-equalizing ring outside the insulating sleeve is used to improve the electric field. It is used to improve the external electric field of the insulating sleeve and reduce the partial discharge level of the product; the iron core adopts a gap structure, and the air gap can avoid the magnetic saturation phenomenon under AC large signal or DC bias, so that it can also be used in the case of overcurrent. Maintaining 30%-50% of the rated inductance, the air gap and the core column of the iron core are cast into one body with resin, which can improve the overall strength of the core column and reduce vibration and noise.

Description

A gas-insulated single-stage iron-core reactor

technical field

The invention relates to the field of reactors, in particular to a gas-insulated single-stage iron-core reactor.

Background technique

Reactors are also called inductors. When a conductor is energized, a magnetic field will be generated in a certain space occupied by it, so all current-carrying electrical conductors are inductive in a general sense. However, the inductance of the energized long straight conductor is small, and the generated magnetic field is not strong, so the actual reactor is the wire wound into the form of a solenoid, which is called an air-core reactor; sometimes in order to make the solenoid have a larger inductance, Then insert the iron core into the solenoid, called the iron core reactor;

Generally, for UHV gas insulated reactors, in order to carry the rated voltage, the high-voltage coil of the iron-core reactor needs to make the volume and shell of the high-voltage coil large enough to meet the rated voltage of the high-voltage coil; In the high-voltage gas-insulated reactor, the high-voltage coil has serious heating problems, and the high-voltage coil is densely wound, resulting in poor heat dissipation effect; in addition, the common gas-insulated UHV iron-core reactor has a disordered electric field and a high level of partial discharge.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a gas-insulated single-stage iron-core reactor, which can solve the problems of a general ultra-high voltage gas-insulated reactor, such as serious heating of the high-voltage coil, poor heat dissipation effect, high partial discharge level, and disordered electric field of the product .

In order to solve the above-mentioned technical problems, the technical scheme of the present invention is: a gas-insulated single-stage iron-core reactor, the innovation of which is that it includes a high-voltage insulation module, an iron-core module and a support insulation module;

The high-voltage insulating module includes an insulating sleeve, a conductive pipe, a voltage-equalizing electrode and a voltage-equalizing ring; the bottom end of the insulating sleeve is connected to the iron core module, the conductive pipe penetrates the insulating sleeve and is coaxially arranged, and the The top end of the conductive tube extends out of an insulating sleeve and is connected with a high-voltage terminal; the bottom end of the conductive tube extends out of the insulating sleeve and into the core module; the voltage equalizing electrode is arranged in the insulating sleeve and extends from the conductive tube The bottom end is nested on the conductive tube; the bottom end of the voltage equalizing electrode is connected to the iron core module; the voltage equalizing ring is nested on the insulating sleeve and is located at the upper and lower ends of the side of the insulating sleeve;

The iron core module includes a casing, an iron core, a high-voltage shielding cover, a high-voltage coil and a low-voltage shielding plate; the casing has a cylindrical structure, and the top end of the casing is connected with the high-voltage insulating module, and the bottom end of the casing is connected with the supporting insulating module; _A gas control valve is arranged on the side of the casing, and the casing is filled or released with SF gas through the gas control valve, and a low-voltage terminal is arranged on the bottom end of the side of the casing; the iron core is arranged in the casing, And the iron core is provided with a horizontal core column; the high-voltage coil is nested on the horizontal core column of the core to form a single-stage structure; the high-voltage shield is nested on the high-voltage coil; the low-voltage shielding plate is installed on the core on the top side of the

The support insulating module has several post insulators, and the top ends of the post insulators are connected to the bottom end of the iron core module to support the single-stage iron core reactor.

Further, a pressure monitoring interface is provided at the bottom end of the side of the casing.

Further, a plurality of air gaps are arranged in the core column of the iron core, and the air gap and the core column of the iron core are integrally cast with resin.

Further, the high-voltage coil is wound with enameled wire and glue dispensing film, and an epoxy strip is arranged in the middle of the high-voltage coil, and an air channel is formed by the support of the epoxy strip, which is convenient for the heat dissipation of the high-voltage coil.

The advantages of the present invention are:

1) In the present invention, a single-stage structure is adopted, and the high-voltage coil is provided with epoxy strip support to form an air channel, which improves the heat dissipation performance; The conductive tube and the voltage equalizing electrode are used to improve the electric field inside the insulating sleeve, and the voltage equalizing ring outside the insulating sleeve is used to improve the external electric field of the insulating sleeve, which reduces the partial discharge level of the product.

2) In the present invention, the iron core adopts a gap structure, and the air gap can avoid the magnetic saturation phenomenon under AC large signal or DC bias, so that it can maintain 30%-50% of the rated inductance in the case of overcurrent. The gap and the core column of the iron core are cast into one body with resin, which can improve the overall strength of the core column and reduce vibration and noise.

Description of drawings

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a structural diagram of a gas-insulated single-stage iron-core reactor according to the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 , a gas-insulated single-stage iron-core reactor includes a high-voltage insulation module 1 , an iron-core module 2 and a support insulation module 3 .

The high-voltage insulating module 1 includes an insulating sleeve 11, a conductive tube 12, a voltage equalizing electrode 13 and a voltage equalizing ring 14; the bottom end of the insulating sleeve 11 is connected to the core module 2, and the conductive tube 12 penetrates the insulating sleeve 11 and is coaxially arranged , the top end of the conductive tube 12 extends out of the insulating sleeve 11 and is connected with a high-voltage terminal 15; the bottom end of the conductive tube 12 extends out of the insulating sleeve 11 and extends into the core module 2; the voltage equalizing electrode 13 is arranged in the insulating sleeve. 11 and nested on the conductive tube 12 from the bottom end of the conductive tube 12; the bottom end of the equalizing electrode 13 is connected to the core module 2; the equalizing ring 14 is nested on the insulating sleeve 11 and located in the insulating sleeve 11 at the upper and lower ends of the sides.

The iron core module 2 includes a casing 21, an iron core 22, a high voltage shielding cover 23, a high voltage coil 24 and a low voltage shielding plate 25; The supporting insulation module 3 is connected; a gas control valve 26 is provided on the side of the casing 21, and the casing 21 is filled or released with SF ₆ gas through the gas control valve 26, and a low-voltage terminal 27 is provided on the bottom end of the side of the casing 21 The iron core 22 is arranged in the shell 21, and the iron core 21 is provided with a horizontal core column; the high-voltage coil 24 is nested on the horizontal core column of the iron core to form a single-stage structure; ; The low-voltage shielding plate 25 is installed on the top side of the iron core 22 .

The support insulating module 3 has several post insulators 31 , and the top ends of the post insulators 31 are connected to the bottom end of the iron core module 2 to support the single-stage iron core reactor.

A pressure monitoring interface 28 is provided at the bottom end of the side of the casing 21 .

Several air gaps are arranged in the core column of the iron core 22, and the air gap and the core column of the iron core 22 are cast into one body with resin; the air gap can avoid the magnetic saturation phenomenon under the large AC signal or DC bias, making it in the case of overcurrent 30%-50% of the rated inductance can also be maintained at the lower end. The air gap and the core column of the iron core 22 are cast into one body with resin, which can improve the overall strength of the core column and reduce vibration and noise.

The high-voltage coil 24 is wound with enameled wire and a dispensing film, and an epoxy strip is arranged in the middle of the high-voltage coil 24, and an air passage is formed by the support of the epoxy strip, which facilitates the heat dissipation of the high-voltage coil 24.

The working principle of the invention is as follows: the high-voltage terminal is connected to the high-voltage power supply, and the single-stage structure is adopted. The high-voltage coil is provided with an epoxy strip to support to form an air channel, which improves the heat dissipation performance; the high-voltage shielding cover and the low-voltage shielding plate are used for uniform high-voltage lines. The electric field inside the insulating sleeve is used to improve the electric field inside the insulating sleeve, the voltage equalizing ring outside the insulating sleeve is used to improve the external electric field of the insulating sleeve, and the partial discharge level of the product is reduced; Low-voltage terminals realize output.

Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. The utility model provides a gas-insulated single-stage formula iron core reactor which characterized in that: the high-voltage insulation module comprises a high-voltage insulation module, an iron core module and a support insulation module;

the high-voltage insulation module comprises an insulation sleeve, a conductive tube, a voltage-sharing electrode and a voltage-sharing ring; the bottom end of the insulating sleeve is connected with the iron core module, the conductive tube penetrates through the insulating sleeve and is coaxially arranged, and the top end of the conductive tube extends out of the insulating sleeve and is connected with a high-voltage wiring terminal; the bottom end of the conductive tube extends out of the insulating sleeve and extends into the iron core module; the voltage-sharing electrode is arranged in the insulating sleeve and is embedded on the conductive tube from the bottom end of the conductive tube; the bottom end of the voltage-sharing electrode is connected to the iron core module; the grading ring is nested on the insulating sleeve and is positioned at the upper end and the lower end of the side edge of the insulating sleeve;

the iron core module comprises a shell, an iron core, a high-voltage shielding cover, a high-voltage coil and a low-voltage shielding plate; the shell is of a cylindrical structure, the top end of the shell is connected with the high-voltage insulation module, and the bottom end of the shell is connected with the supporting insulation module; the side edge of the shell is provided with a gas control valve, and SF is filled into or released from the shell through the gas control valve₆The low-voltage wiring terminal is arranged at the bottom end of the side edge of the shell; the iron core is arranged in the shell, and a horizontal core column is arranged on the iron core; the high-voltage coil is nested on a horizontal core column of the iron core to form a single-stage structure; the high-voltage shielding cover is nested on the high-voltage coil; the low-voltage shielding plate is arranged on the side edge of the top end of the iron core;

the supporting insulation module is provided with a plurality of supporting insulators, and the top ends of the supporting insulators are connected to the bottom end of the iron core module to support the single-stage iron core reactor.

2. A gas-insulated single-stage core reactor according to claim 1, characterized in that: and a pressure monitoring interface is arranged at the bottom end of the side edge of the shell.

3. A gas-insulated single-stage core reactor according to claim 1, characterized in that: a plurality of air gaps are arranged in the core column of the iron core, and the air gaps and the core column of the iron core are cast into a whole by resin.

4. A gas-insulated single-stage core reactor according to claim 1, characterized in that: the high-voltage coil adopts enameled wire and point to glue film coiling, is provided with if the epoxy strip in the middle of the high-voltage coil, forms the air flue through the support of epoxy strip, is convenient for high-voltage coil heat give off.

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