CN219268156U

CN219268156U - External integrated filter capacitor device of LCL module

Info

Publication number: CN219268156U
Application number: CN202320658949.5U
Authority: CN
Inventors: 林延鹏; 王利军; 相学仁; 蒲延洲; 程晓霞; 蔡立虎; 刘雨曈
Original assignee: Dalian Shangjia New Energy Technology Co ltd
Current assignee: Dalian Shangjia New Energy Technology Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-06-27
Anticipated expiration: 2033-03-30

Abstract

The utility model provides an external integrated filter capacitor device of an LCL module, which comprises an external filter capacitor box arranged outside a converter cabinet body, wherein a filter capacitor is arranged in the external filter capacitor box, and a lead-out terminal of the filter capacitor is connected with one end of a wiring copper bar; the other end of the wiring copper bar penetrates out of the external filter capacitor box and is connected with an LCL module in the converter cabinet body through a connecting cable. The utility model is mainly applied to wind power generation air-cooled converters, can avoid the influence of heat in the converter cabinet on the capacitance, is convenient and quick to separate or install an LCL module from a filter capacitor, and is convenient to maintain.

Description

External integrated filter capacitor device of LCL module

Technical Field

The utility model belongs to the technical field of wind power generation, and particularly relates to an external integrated filter capacitor device of an LCL module.

Background

At present, the filter capacitors of LCL modules in the mainstream wind power converter are integrated in the modules or installed in the cabinet at the positions close to the modules.

The converter cabinet has a plurality of heating devices, the integration degree is high, the heat accumulation in the cabinet is difficult to discharge, the temperature in the cabinet is more than 50 ℃ for a long time, and the service life of the devices in the cabinet is greatly influenced. Particularly, the filter capacitor is more sensitive to temperature, and the capacitor damage caused by long-term high-temperature operation is increased, so that the operation stability of the converter is seriously influenced, the economic loss is caused, and a plurality of inconveniences are brought to the daily maintenance work of equipment.

Furthermore, the similar filter capacitor products in the market mostly adopt a plurality of single capacitors to form a capacitor group, so that the occupied space is large, the appearance is large, and the appearance is not attractive; and the space of the connecting cable position of the capacitor bank and the LCL module is narrow, so that the maintenance and replacement of the later stage are inconvenient.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides an external integrated filter capacitor device of an LCL module, which is mainly applied to a wind-cooled converter for wind power generation, can avoid the influence of heat in a converter cabinet on the capacitor, and is convenient and quick to separate or install and convenient to maintain.

The utility model adopts the technical proposal for solving the technical problems that: an external integrated filter capacitor device of an LCL module comprises an external filter capacitor box arranged outside a converter cabinet body, wherein a filter capacitor is arranged in the external filter capacitor box, and an extraction terminal of the filter capacitor is connected with one end of a wiring copper bar; the other end of the wiring copper bar penetrates out of the external filter capacitor box and is connected with an LCL module in the converter cabinet body through a connecting cable.

As a further embodiment of the present utility model, the filter capacitor is an integrated ac filter capacitor, and a thermocouple is built in the integrated ac filter capacitor.

As a further embodiment of the utility model, the external filter capacitor box is a closed box structure with a top, a bottom and side walls, and a plurality of ventilation and heat dissipation holes are formed in the side walls of the box.

As a further embodiment of the utility model, the external filter capacitor box is arranged at the top of the converter cabinet body, the bottom of the external filter capacitor box is provided with an extraction hole for the wiring copper bar to pass through, and the top of the converter cabinet body is provided with an introduction hole correspondingly communicated with the extraction hole; the other end of the wiring copper bar penetrates out of the external filter capacitor box through the lead-out hole and stretches into the converter cabinet body through the lead-in hole.

As a further embodiment of the utility model, the external filter capacitor box is made of stainless steel with a surface wire drawing treatment.

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

1. the external filter capacitor box is arranged outside the converter cabinet body and is isolated from the heat in the cabinet;

2. the filter capacitor wiring copper bar is led out from the bottom of the external filter capacitor box and extends into the converter cabinet, and is connected with the LCL module through a cable, so that the cable is convenient and quick to disassemble and assemble, and maintenance is convenient;

3. an integrated alternating current filter capacitor is selected, a thermocouple is arranged in the capacitor, the occupied space is small, and the temperature state of the capacitor can be monitored in real time;

4. the side plate of the external filter capacitor box is reserved with ventilation and heat dissipation holes, so that the filter capacitor can dissipate heat rapidly;

5. the external filter capacitor box adopts a 304 stainless steel shell, and has attractive appearance and durability by a surface wire drawing process;

6. the external filter capacitor box is arranged at the top of the converter cabinet body, the circumferential dimension of the converter cabinet body is not influenced, and the space is saved.

Drawings

FIG. 1 is a schematic view of the overall mounting structure of the present utility model at an angle;

FIG. 2 is a schematic view of the overall mounting structure of the present utility model at another angle;

FIG. 3 is an isometric view of the overall structure of the present utility model at an angle;

FIG. 4 is an isometric view of the overall structure at another angle of the present utility model;

FIG. 5 is a front view of the present utility model;

FIG. 6 is a side view of the present utility model;

fig. 7 is an exploded view of the structure of the present utility model.

In the figure: 1-a front cover plate of the capacitor box; 2-a capacitor box upper cover plate; 3-wiring copper bars; 4-capacitance box bottom plate; a 5-filter capacitor; 6-a capacitor box side plate; 7-an external filter capacitor box; 8-connecting a cable; a 9-LCL module; 10-ventilation and heat dissipation holes; 11-lead-out hole.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The utility model provides an external integrated filter capacitor device of LCL module, includes the rectangle external filter capacitor box 7 that comprises a capacitor box front shroud 1, capacitor box upper shroud 2, capacitor box bottom plate 4 and three capacitor box curb plate 6, and specifically capacitor box curb plate 6 is installed perpendicularly on capacitor box bottom plate 4, and capacitor box front shroud 1 installs on capacitor box curb plate 6, and capacitor box upper shroud 2 installs at capacitor box curb plate 6 top;

the integrated alternating current filter capacitor positioned in the external filter capacitor box 7 is arranged on the upper surface of the capacitor box bottom plate 4, the lower surface of the capacitor box bottom plate 4 is arranged on the top of the converter cabinet body and isolated from heat in the converter cabinet, so that the influence of heat in the converter cabinet on the integrated alternating current filter capacitor is avoided; the integrated alternating current filter capacitor selected in the embodiment is internally provided with the thermocouple, is self-contained, and can monitor the temperature state of the capacitor in real time; an alternative model of the integrated ac filter capacitor is MP9-20919J.

The leading-out terminal arranged in the horizontal direction of the integrated alternating current filter capacitor is connected with one end of the L-shaped wiring copper bar 3, the other end of the L-shaped wiring copper bar 3 downwards extends out of the leading-out hole 11 formed in the capacitor box bottom plate 4, and extends into the converter cabinet body from the leading-in hole formed in the top of the converter cabinet body and communicated with the leading-out hole 11;

the L-shaped wiring copper bar 3 stretches into one end in the converter cabinet body and is connected with the LCL module 9 in the converter cabinet body through the connecting cable 8, when the LCL module 9 needs maintenance, the LCL module 9 can be separated from the external filter capacitor box 7 only by dismantling the connecting cable 8 connected with one end of the wiring copper bar 3, and the maintenance is convenient and fast.

The box body of the external filter capacitor box 7 is a 304 stainless steel shell, the surface wire drawing process is carried out, shutter type punching ventilation heat dissipation holes are reserved on three capacitor box side plates 6 of the box body, and the surface is attractive and can well dissipate heat of the integrated alternating current filter capacitor.

The external filter capacitor box 7 can also be made of other materials and surface processing technologies, such as galvanized sheet, aluminum alloy sheet, resin sheet, glass fiber reinforced plastic and the like, and the surface can be made of various processing technologies such as electroplating, electrostatic spraying, coloring oxidation, frosting and the like.

The shape, the size or the number of the punched ventilation heat dissipation holes on the side plate 6 of the capacitor box can be changed according to actual heat dissipation requirements, and the punched ventilation heat dissipation holes can be replaced by finished plastic shutters.

In another embodiment, the external filter capacitor box 7 can be also arranged as an integral structure, and the filter capacitor can be designed into various other external dimensions according to the use requirement.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. An external integrated filter capacitor device of an LCL module is characterized by comprising an external filter capacitor box (7) arranged outside a converter cabinet body, wherein a filter capacitor (5) is arranged in the external filter capacitor box (7), and a lead-out terminal of the filter capacitor (5) is connected with one end of a wiring copper bar (3); the other end of the wiring copper bar (3) penetrates out of the external filter capacitor box (7) and is connected with an LCL module (9) in the converter cabinet body through a connecting cable (8).

2. An external integrated filter capacitor device of an LCL module according to claim 1, wherein the filter capacitor (5) is an integrated ac filter capacitor with a thermocouple inside.

3. The external integrated filter capacitor device of the LCL module according to claim 1, wherein the external filter capacitor box (7) is a closed box structure with a top, a bottom and a side wall, and a plurality of ventilation and heat dissipation holes (10) are formed in the side wall of the box.

4. The external integrated filter capacitor device of the LCL module according to claim 1, wherein the external filter capacitor box (7) is arranged at the top of the converter cabinet body, an outgoing hole (11) for the wiring copper bar (3) to pass through is formed in the bottom of the external filter capacitor box, and an incoming hole correspondingly communicated with the outgoing hole (11) is formed in the top of the converter cabinet body; the other end of the wiring copper bar (3) penetrates out of the external filter capacitor box (7) through the lead-out hole (11) and stretches into the converter cabinet body through the lead-in hole.

5. An external integrated filter capacitor device of an LCL module according to claim 3 or 4, wherein the external filter capacitor box (7) is made of stainless steel with a surface wire-drawing treatment.