CN215267660U - Reactive harmonic device type switch cabinet - Google Patents

Abstract

The utility model provides a reactive harmonic device type cubical switchboard, include: the cabinet body, the top and the back door of the cabinet body are provided with a heat radiating fan; the upper layer comprises a plastic shell switch and a secondary terminal row which are fixed on the cabinet body through a switch mounting plate; the middle layer comprises a transverse connecting bus fixed on the cabinet body by an insulator and a branch bus connected with an upper plastic shell switch; and the lower layer comprises an active filter module and a static var generating module and is connected to the transverse connecting busbar through branch buses.

Description

Reactive harmonic device type switch cabinet

Technical Field

The utility model belongs to the technical field of the electrical control cabinet, concretely relates to idle harmonic device type cubical switchboard.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

In the low-voltage complete design scheme, reactive power compensation mostly comprises a capacitor cabinet consisting of a controller and a capacitor series reactor; the reactive compensation cannot keep up with the speed of load change, over compensation or under compensation is caused, a three-phase unbalanced power grid is not provided with a split-phase compensation device, split-phase over compensation or under compensation is easily caused, the energy consumption is increased, a series reactor can filter partial harmonic waves, but improper selection causes serious amplification of certain harmonic waves and even resonance, and the safety of the device and the system is endangered. The harmonic harm can be effectively eliminated by adding the active filter cabinet, but the cost is too high, and the requirement on the space of a power distribution room is also limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provided a reactive harmonic device type cubical switchboard, this cubical switchboard is through installing compensation arrangement and active filter device integration in a cubical switchboard, centralized control administers in coordination, and it has safe and reliable, and the low cost realizes best treatment effect, saves advantages such as space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a reactive harmonic device type switch cabinet;

a reactive harmonic device type switchgear comprising: the cabinet body, the top and the back door of the cabinet body are provided with a heat radiating fan; the upper layer comprises a plastic shell switch and a secondary terminal row which are fixed on the cabinet body through a switch mounting plate; the middle layer comprises a transverse connecting bus fixed on the cabinet body by an insulator and a branch bus connected with an upper plastic shell switch; and the lower layer comprises an active filter module and a static var generating module and is connected to the transverse connecting busbar through branch buses.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the switch cabinet integrates the functions of compensation and filtering, can be simultaneously managed, and can provide continuous, smooth, dynamic and rapid reactive power compensation from the sensing to the capacitive and multiple harmonic filtering.

(2) The cabinet body adopts the C section bar support body, carries out the structure according to the function and separates, and upper, middle and lower floor distributes clearly, safe and reliable.

(3) The lower layer can be changed the module of big or small difference capacity according to the design demand, or increase or reduce, and is nimble changeable, easy dismounting.

(4) And an air inlet heat dissipation fan is arranged at the lower part of the rear door of the cabinet body to introduce external air flow, and an air outlet heat dissipation fan is arranged at the top of the cabinet to introduce internal air flow, so that elements in the switch cabinet can be cooled and dedusted.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is an internal schematic view of a reactive harmonic device type switchgear in an embodiment of the present invention;

fig. 2 is a schematic diagram of a reactive harmonic device type switchgear in an embodiment of the present invention;

the intelligent cabinet comprises a cabinet body 1, a heat dissipation fan 2, a plastic shell switch 3, a switch mounting plate 4, a secondary terminal row 5, a busbar protective cover 6, a transverse connection busbar 7, an insulator 8, a static reactive power generation module 9, an active filter module 10, a static reactive power generation module mounting plate 11, an active filter module mounting plate 12, a plastic shell circuit breaker I, a static reactive power generation device II and an active filter device III.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "top", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.

Example one

Fig. 1 is an internal schematic view of a reactive harmonic device type switch cabinet according to an embodiment of the present invention, as shown in fig. 1, a reactive harmonic device type switch cabinet includes: the cabinet comprises a cabinet body 1, wherein heat dissipation fans 2 are arranged at the top and the rear door of the cabinet body 1; the upper layer comprises a plastic shell switch 3 and a secondary terminal strip 5 which are fixed on the cabinet body 1 through a switch mounting plate 4; the middle layer comprises a transverse connecting bus 7 fixed on the cabinet body 1 by an insulator 8 and a branch bus connected with the upper plastic shell switch 3; and the lower layer comprises an active filter module 10 and a static var generating module 9, and the active filter module and the static var generating module are connected to the transverse connecting busbar 7 through branch buses.

Wherein, 2 one of radiator fan installs on the top of cubical switchboard, and another installs the back door at the cubical switchboard, carries out the interior heat dissipation cooling of necessary cabinet, and switch mounting panel 4 is installed to radiator fan 2's below, and the female row 7 of the horizontal connection that uses female protection casing 6 is installed to switch mounting panel 4's below, and the female specification size of arranging 7 of horizontal connection can be adjusted wantonly, does not restrict to concrete setting. The busbar protective cover 6 is used for preventing mistaken entering of the electrified interval.

Two parallel static var generating modules 9 are installed below the transverse connecting busbar 7, and two parallel active filter modules 10 are installed below the static var generating modules 9. The number of the static var generating modules 9 and the number of the active filtering modules 10 can be increased or decreased according to the requirement, and the sequence of the static var generating modules 9 and the active filtering modules 10 is not particularly limited.

Example two

The fixing holes at the two sides of the switch mounting plate 4 are connected with the holes of the upright column section bar of the cabinet body 1, and the plastic shell switch 3 is fixed at the corresponding mounting holes of the switch mounting plate 4. The secondary terminal strip 5 is fixed on the corresponding hole position of the switch mounting plate 4 through the clamping rail mounting hole. In order to match with plastic shell switches with various specifications and sizes, the mounting hole position of the switch mounting plate 4 can be set at will, and the specific arrangement is not limited.

The transverse connecting bus bar 7 is connected with the cabinet body 1 section bar through an insulator 8. A plurality of hole sites are reserved on the transverse connecting bus bar 7 and are used for connecting the branch bus bars with the lower-layer element.

The static var generating module 9 is arranged on the static var generating module mounting plate 11, and the static var generating module 9 is placed on the lower layer transverse section bar of the cabinet body 1. The two sides of the static var generating module mounting plate 11 are connected with the hole sites of the upright post section bar of the cabinet body 1, and the front mounting hole of the static var generating module 9 is connected with the front hole site of the static var generating module mounting plate 11. The active filter module 10 is installed on the active filter module installation plate 12, and the active filter module 10 is placed on the lower layer cross section of the cabinet body 1. The active filter module mounting plate 12 is connected with the hole site of the upright column profile of the cabinet body 1, and the front mounting hole of the active filter module 10 is connected with the front hole site of the active filter module mounting plate 12. The number of the static var generating modules 9 and the number of the static var generating module mounting plates 11 may be the same or different, and one or more static var generating modules 9 may be mounted on one static var generating module mounting plate 11. The number of the active filter modules 10 and the number of the active filter module mounting plates 12 may be the same or different, and one or more active filter modules 10 may be mounted on one active filter module mounting plate 12. The lower layer element mounting mode is the same.

In order to better improve the quality of electric energy and obtain the benefits of energy saving and consumption reduction, the static reactive power generation module 9 and the active filtering module 10 monitor the change of load current in real time through an external current transformer, a PWM (pulse width modulation) technology is adopted, the static reactive power generation module 9 outputs capacitive or inductive current of reactive power demand of a system to realize dynamic split-phase reactive power compensation, and the active filtering module 10 controls the inverter to generate compensation current with the same magnitude and the opposite phase as the load and to offset harmonic components in the system current so as to achieve the effect of filtering harmonic waves.

In order to realize better cooling of the upper, middle and lower layer elements, the heat dissipation fan 2 arranged at the lower part of the back door of the cabinet body 1 and the heat dissipation fan 2 arranged at the top of the cabinet are controlled by a temperature controller, the heat dissipation fan arranged below the cabinet body 1 is set as an air inlet, a filter screen is arranged at an air port to prevent dust from entering secondarily, the heat dissipation fan 2 arranged at the top of the cabinet body 1 is set as an air outlet to enable air in the cabinet to flow, and hot air is discharged. The cabinet body 1 is equal to the equal device cooling fan 2 in qianmen, back door, increases quantity according to the volume demand of airing exhaust actually, and is unified to be controlled by the temperature controller.

EXAMPLE III

Fig. 2 is the utility model discloses a schematic diagram of reactive harmonic device type cubical switchboard, as shown in fig. 2, including moulded case circuit breaker I, static idle generating device II and active filter device III, wherein, moulded case circuit breaker I plays the circuit isolation guard action, and static idle generating device II plays the power compensation effect, and active filter device III plays the harmonic and administers the effect.

The switch cabinet is integrally installed in one switch cabinet through the static var generator II and the active filter device III, centralized control and cooperative treatment are achieved, and the switch cabinet has the advantages of being safe, reliable, low in cost, capable of achieving the best treatment effect, saving space and the like.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (10)

1. A reactive harmonic device type switchgear, comprising: the cabinet body, the top and the back door of the cabinet body are provided with a heat radiating fan; the upper layer comprises a plastic shell switch and a secondary terminal row which are fixed on the cabinet body through a switch mounting plate; the middle layer comprises a transverse connecting bus fixed on the cabinet body by an insulator and a branch bus connected with an upper plastic shell switch; and the lower layer comprises an active filter module and a static var generating module and is connected to the transverse connecting busbar through branch buses.

2. The reactive harmonic device type switchgear of claim 1, wherein the fixing holes of both sides of the switch mounting plate are connected to the cabinet body upright post section hole sites, and the plastic shell switches are fixed to the corresponding mounting hole sites of the switch mounting plate.

3. The reactive harmonic device-type switchgear of claim 1, wherein the secondary terminal strip is secured to the corresponding hole site of the switch mounting plate by a rail mounting hole.

4. The harmonic reactive power device-type switchgear of claim 1, wherein the cross-connection busbar is connected to the cabinet profile by an insulator.

5. The harmonic reactive device type switchgear of claim 1, wherein said cross connecting busbar reserves a plurality of holes for cable connection to lower layer elements.

6. The harmonic reactive power generation device type switchgear of claim 1, wherein the static var generating module is mounted on a static var generating module mounting plate and the static var generating module is placed on a lower cabinet layer cross-section.

7. The var harmonic device-type switchgear according to claim 6, wherein both sides of the SVG mounting plate are connected to the holes of the vertical posts of the switchgear, and the front mounting hole of the SVG module is connected to the front hole of the SVG mounting plate.

8. The reactive harmonic device type switchgear according to claim 1, wherein said active filter module is mounted on an active filter module mounting plate and said active filter module is placed on a cabinet lower layer cross section.

9. The reactive harmonic device type switchgear of claim 8, wherein the active filter module mounting plate is connected to the cabinet body post profile hole site, and the active filter module front mounting hole is connected to the active filter module mounting plate front hole site.

10. The reactive harmonic device type switchgear according to claim 1, wherein the heat dissipation fan is connected to a temperature controller.

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