CN216721161U - Current transformer - Google Patents

Abstract

The application provides a converter, which relates to the field of converters and comprises a cabinet body, a power unit, a filtering unit and a control system; a front mounting area and a rear mounting area are arranged in the cabinet body in the front-rear direction; the power unit is arranged in the rear mounting area; the filtering unit is arranged in the rear mounting area, and the input end of the filtering unit is electrically connected with the output end of the power unit; the control system is arranged in the front mounting area and comprises an isolating switch and an input reactor, and the isolating switch, the input reactor and the power unit are electrically connected in sequence; the technical problems that the structure is large in size and high in cost due to unreasonable layout of internal electrical components of an existing converter are mainly solved.

Description

Current transformer

Technical Field

The application belongs to the field of converters, and particularly relates to a converter.

Background

A converter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system. The current transformer can be divided into the following types according to different voltage types at two ends:

DC/DC converter: both ends are direct current and can be equivalent to a direct current transformer;

the AC/DC converter can be called as a controllable rectifying device and can realize power transmission from alternating current to direct current;

the DC/AC converter, which can be called an inverter, can realize power transmission from direct current to alternating current;

the AC/AC converter can be called as a frequency converter and can realize the conversion of alternating current frequency;

an AC/DC/AC converter, also referred to as a frequency converter, functions as described above.

With the increasing demand of high power in the energy storage industry, in the structural layout of the existing energy storage system, the control of a super capacitor cabinet or the structural layout scheme of a high-power DC/DC converter generally consists of a power unit, a filtering unit and a control system. The existing converter is generally a cabinet combined by a power unit and a filter unit, a control system is separately formed into a cabinet, and then two cabinet bodies are connected in parallel to form a unit cabinet and a control cabinet. This kind of mode of cabinet combination leads to area great, the commonality is lower, become the problem that the cabinet is with high costs, is difficult for realizing large batch processing moreover, and in addition, cable or copper bar of being connected between unit cabinet and the switch board is longer, and owing to there is the deviation of displacement between the cabinet combination is connected, so can lead to connecting copper bar or cable also comparatively difficult during the installation.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a converter, which mainly solves the technical problems of large structural size and high cost of the existing converter caused by unreasonable layout of internal electrical components.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a current transformer including:

the refrigerator comprises a cabinet body, wherein a front mounting area and a rear mounting area are arranged in the cabinet body in the front-rear direction;

a power unit disposed at the rear mounting area;

the filtering unit is arranged in the rear mounting area, and the input end of the filtering unit is electrically connected with the output end of the power unit;

a control system disposed at the front mounting area; the control system comprises an isolating switch and an input reactor, and the isolating switch, the input reactor and the power unit are electrically connected in sequence.

In one embodiment, the power unit and the filtering unit are arranged side by side along a horizontal line.

In one embodiment, the control system further comprises an auxiliary component arranged below the input reactor; the converter further comprises a movable inner door arranged on one side, facing the front door, of the auxiliary component, and the movable inner door is used for blocking the auxiliary component.

In one embodiment, the converter further comprises an air guide cover arranged at the top of the cabinet body, so that heat in the front installation area and heat in the rear installation area can be exhausted from the top outwards.

In one embodiment, the converter further comprises a front door and a rear door, the front door is connected to the front of the cabinet body, and the rear door is connected to the rear of the cabinet body.

In one embodiment, the bottom of the front door and the bottom of the rear door are both provided with filter screens for ventilation and filtration, so that outside air can enter the cabinet body from the filter screens.

In one embodiment, air inlet holes are formed in the outer walls, facing the rear door, of the power unit and the filtering unit, air inlet channels are formed in the power unit and the filtering unit, and the air inlet channels are communicated with the air inlet holes.

In one embodiment, the cabinet body comprises a frame and side plate assemblies arranged on two sides of the frame; the power unit, the filtering unit and the control system are all fixedly connected in the frame, the front door is rotatably connected in front of the frame, and the rear door is rotatably connected in rear of the frame.

In one embodiment, sponge blocks are arranged on the inner sides of the side plate assemblies, the front door and the rear door.

In one embodiment, the side plate assembly comprises a heat insulation plate and an insulation protection plate which are sequentially arranged from bottom to top, and the height of the heat insulation plate is higher than that of the power unit and the filtering unit.

Compared with the prior art, the converter that this application provided's beneficial effect lies in at least:

the converter is provided with only one cabinet body, and the power unit, the filtering unit and the control system are integrated in the same cabinet body, so that the cost of the whole converter is reduced and the occupied space is smaller; in addition, this application has set up power unit and filtering unit in the internal rear of cabinet in unison, sets up control system in the internal place ahead of cabinet, and the overall arrangement structure that the converter adopted this application can reduce production manufacturing cost by a wide margin and reduce area.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a converter provided in an embodiment of the present application when a rear door is in an open state;

fig. 2 is a schematic structural diagram of a converter provided in an embodiment of the present application when a front door is in an open state;

fig. 3 is a rear view of a current transformer according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of two current transformers provided in the embodiment of the present application when being combined;

fig. 5 is a schematic structural diagram of three converters provided in the embodiment of the present application when being combined in a cabinet.

Wherein, in the figures, the respective reference numerals:

1. a cabinet body; 11. a frame; 12. a side plate assembly; 13. a top plate; 14. a base plate; 111. a front mounting area; 112. a rear mounting area; 121. a heat insulation plate; 122. an insulating protection plate;

2. a power unit; 21. a first handle; 22. an air inlet; 23. an air intake passage;

3. a filtering unit; 31. a second handle;

4. a control system; 41. an isolating switch; 42. an input reactor; 43. an auxiliary component;

5. a front door; 51. a front door lock; 52. a filter screen; 6. a rear door; 61. a rear door lock;

7. a movable inner door; 8. a sponge block; 9. a wind scooper; 91. an air vent;

10. a bus copper bar; 20. and a grounding copper bar.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

The application provides a converter, and the structural layout scheme of the converter can meet the requirement of high-power DC/DC conversion control of an energy storage system. Referring to fig. 1 to fig. 3, a current transformer according to an embodiment of the present application will be described. The converter comprises a cabinet body 1, a power unit 2, a filtering unit 3, a control system 4, a front door 5 and a rear door 6. Wherein the direction indicated by the solid line arrow shown in fig. 1 is the rear, and the direction indicated by the broken line arrow is the left.

Referring to fig. 1-3, the cabinet 1 includes a frame 11, two side plate assemblies 12, a top plate 13 and a bottom plate 14, wherein one side plate assembly 12 is fixed on the left side of the frame 11, the other side plate assembly 12 is fixed on the right side of the frame 11, the top plate 13 covers the top of the frame 11, the bottom plate 14 covers the bottom of the frame 11, the front door 5 is hinged to the front of the frame 11, and the rear door 6 is hinged to the rear of the frame 11. Equivalently, the two side plate assemblies 12, the top plate 13, the bottom plate 14, the front door 5 and the rear door 6 are arranged on the outer sides of the frame 11 in all directions together, so that the components inside the frame 11 are well protected. The worker can perform maintenance on the components mounted on the front side of the frame 11 by opening the front door 5, and can also perform maintenance on the components mounted on the rear side of the frame 11 by opening the rear door 6. In order to protect the internal components of the frame 11 more effectively and to prevent a person from touching the electrically charged electrical components inside the frame 11, the front door 5 is provided with a front door lock 51, and the rear door 6 is provided with a rear door lock 61.

Specifically, referring to fig. 1 to 3, the frame 11 is a profile structure as a whole, and the frame 11 of the profile structure not only can ensure high bearing strength, but also is convenient for matching the spatial layout of the power unit 2, the filter unit 3 and the control system 4 more compactly and reasonably, thereby greatly reducing the floor area of the converter. Secondly, the mode that the section bar becomes the cabinet is also comparatively ripe and convenient, and the size width, degree of depth and the height of frame 11 can all carry out the suitability quick adjustment according to the part size of required installation to improve the assembly efficiency of the converter cabinet of various specifications. In addition, the sectional material has the advantages of short purchase period, convenience in processing and lower cost, so that the production cost of the converter cabinet is reduced, and the delivery period of the converter cabinet is shortened.

More specifically, referring to fig. 1 and 2 together, fig. 1 is a schematic structural diagram of the back side of the converter, fig. 2 is a schematic structural diagram of the front side of the converter, the front side of the frame 11 is provided with a front mounting area 111, the back side of the frame 11 is provided with a back mounting area 112, the power unit 2 and the filter unit 3 are arranged in the back mounting area 112, and the length direction of the outer shapes of the power unit 2 and the filter unit 3 is the same as the vertical direction. Specifically, the power unit 2 and the filter unit 3 are vertically fixed to a cross member on the back of the frame 11 by screws. In the present embodiment, in consideration of the rational spatial layout, the conventional power unit 2 and filter unit 3 are preferably fixed side by side in the horizontal direction on the back surface of the frame 11. In addition, the control system 4 is arranged in the front installation area 111, so that the operator can perform maintenance not only on the control system 4 in the front but also on the power unit 2 or the filter unit 3 in the rear.

Further, referring to fig. 1, a first handle 21 is disposed on an outer side surface of the power unit 2, and a second handle 31 is disposed on an outer side surface of the filter unit 3, when the power unit 2 or the filter unit 3 needs to be detached in a maintenance or replacement process, an operator may first loosen a screw between the power unit 2 or the filter unit 3 and the frame 11, and then pull the first handle 21 or the second handle 31 along a rear direction, so that the power unit 2 or the filter unit 3 can be easily taken out, and the modular structural design has the advantage of high maintenance efficiency.

Further, referring to fig. 2, the control system 4 includes an isolation switch 41, an input reactor 42, and an auxiliary component 43. Isolator 41 is fixed on the top position of preceding installing zone 111, and input reactor 42 is fixed in the middle part position of preceding installing zone 111, and auxiliary components 43 arranges in unison on the bottom position of preceding installing zone 111 to convenient change and maintenance reduce cabinet body 1 volume. Secondly, this converter still includes the setting at the activity inner door 7 of preceding installing zone 111, and this activity inner door 7 opens the direction and the qianmen 5 the same, and auxiliary components 43 and wire casing pass through the screw and the guide rail is fixed on activity inner door 7, and activity inner door 7 is used for blockading auxiliary components 43 in the bottom of frame 11 for personnel who does not have the authority can not open auxiliary components 43, thereby ensures that the converter operates more reliably and avoids the outsider to appear the phenomenon of electrocuting because touch auxiliary components 43 and take place. In addition, the incoming lines are in a mode of going in and going out from the bottom of the front mounting area 111 on the frame 11, the incoming lines all enter from the bottom of the front mounting area 111 on the frame 11 and are connected to the isolating switch 41 through copper bars, the isolating switch 41 is connected with the input end of the input reactor 42 through copper bars, the input end of the power unit 2 is connected with the output end of the input reactor 42 through copper bars, the output end of the power unit 2 is electrically connected with the input end of the filtering unit 3 through copper bars in a mode of connecting buses, the output end of the filtering unit 3 is connected to the bus copper bar 10 on the top of the frame 11 through copper bars, and at the moment, direct-current voltage can be output. The input end of the filter unit 3 can be connected with a direct current contactor in parallel, and the voltage buffering can be reduced. The frame 11 is also provided with a ground copper bar 20 at the bottom of the front mounting area 111, so as to meet the grounding requirement of the whole system.

Referring to fig. 1 and fig. 2, the heat dissipation structure of the current transformer of the present application is designed as follows:

in the application, the filter screen 52 is arranged at the bottom of the front door 5 and the bottom of the rear door 6, at the moment, not only can the high protection level of the cabinet body 1 be realized, but also the outside air can pass through the filter screen 52 and enter the converter, because the power unit 2 and the filter unit 3 are main heating modules, a plurality of strip-shaped air inlets 22 are arranged on the outer walls of the power unit 2 and the filter unit 3 facing the rear part, a plurality of air inlet channels 23 longitudinally penetrating through the cabinet body are arranged on the power unit 2 and the filter unit 3, the air inlet channels 23 are communicated with the air inlets 22, so that the outside air can be discharged to the top part after passing through the filter screen 52, the air inlets 22 and the air inlet channels 23 in sequence, in order to improve the discharge efficiency of hot air, the air guide cover 9 is arranged at the top part of the cabinet body 1, and a plurality of air guide holes 91 are arranged at the front and the back of the air guide cover 9, when the outside air passes through the front or the back of the air guiding cover 9, the hot air in the cabinet 1 can be driven to be discharged from the air guiding hole 91.

Referring to fig. 1 to 3 together, the side plate assembly 12 includes a heat insulation plate 121 and an insulation protection plate 122, the heat insulation plate 121 and the insulation protection plate 122 are sequentially disposed from bottom to top, and a highest edge of the heat insulation plate 121 is located at a higher height position than top positions of the power unit 2 and the filter unit 3, referring to fig. 4 and 5 together, when two or more converters are combined, the heat insulation plate 121 on the side can insulate heat inside adjacent converters to prevent heat of adjacent converters from entering each other. Next, referring to fig. 3, a heat insulation board 121 may be disposed on the top of the power unit 2 and the filtering unit 3. In addition, the insulation protection plate 122 can meet the requirement of the top of the current transformer for electrical insulation, and in the present embodiment, the insulation protection plate 122 is preferably a transparent structure in view of easy observation.

Referring to fig. 1 to 3 together, the sponge block 8 is provided on the inner side of the heat insulation board 121, the inner side of the front door 5 and the inner side of the rear door 6, and the sponge block 8 prevents the heat inside the cabinet 1 from flowing back.

Referring to fig. 1, the converters may be used in a single cabinet, referring to fig. 4, the converters may also be used in two parallel cabinets, and at this time, DC/DC conversion control of 1-1.5MW may be implemented, referring to fig. 5, the converters may also be used in three parallel cabinets, and at this time, DC/DC conversion control of 1.5-2MW may be implemented, and so on.

In summary, the converter of the present application has only one cabinet 1, and the power unit 2, the filtering unit 3 and the control system 4 are all integrated in the same cabinet 1, so that the cost of the whole converter is reduced and the occupied space is smaller; in addition, according to the converter power supply device, the power unit 2 and the filtering unit 3 are uniformly arranged at the rear part in the cabinet body 1, the control system 4 is arranged in front of the cabinet body 1, so that an operator can open the front door 5 to repair or maintain the power unit 2 and the filtering unit 3, the operator can open the rear door 6 to repair or maintain the control system 4, and the maintenance efficiency of the converter is improved. The converter disclosed by the utility model is compact in structure, convenient to install and maintain, modular in installation, standard in structure and strong in universality, can meet the processing requirements of batch quantity, shortens the period of forming the cabinet, reduces the cost of forming the cabinet, and can effectively reduce the floor area of the cabinet body.

The foregoing is considered as illustrative only of the preferred embodiments of the utility model, and is presented merely for purposes of illustration and description of the principles of the utility model and is not intended to limit the scope of the utility model in any way. Any modifications, equivalents and improvements made within the spirit and principles of the utility model and other embodiments of the utility model without the creative effort of those skilled in the art are included in the protection scope of the utility model based on the explanation here.

Claims (10)

1. A current transformer, comprising:

the cabinet comprises a cabinet body (1), wherein a front mounting area (111) and a rear mounting area (112) are arranged in the cabinet body (1) in the front-rear direction;

a power unit (2) arranged at the rear mounting area (112);

a filter unit (3) arranged in the rear mounting area (112), and an input end of the filter unit (3) is electrically connected with an output end of the power unit (2);

a control system (4) arranged at said front mounting area (111); the control system (4) comprises an isolating switch (41) and an input reactor (42), and the isolating switch (41), the input reactor (42) and the power unit (2) are electrically connected in sequence.

2. The converter according to claim 1, characterized in that the power unit (2) and the filter unit (3) are arranged side by side in the direction of a horizontal line.

3. The current transformer of claim 1, wherein: the control system (4) further comprises an auxiliary component (43) arranged below the input reactor (42);

the converter further comprises a movable inner door (7) arranged on one side of the auxiliary component (43), and the movable inner door (7) is used for sealing off the auxiliary component (43).

4. The current transformer of claim 1, wherein: the converter further comprises an air guide cover (9) arranged at the top of the cabinet body (1) so that heat in the front mounting area (111) and heat in the rear mounting area (112) can be exhausted outwards from the top.

5. The converter according to any of claims 1 to 4, wherein: the converter further comprises a front door (5) and a rear door (6), the front door (5) is connected to the front of the cabinet body (1), and the rear door (6) is connected to the rear of the cabinet body (1).

6. The converter of claim 5, wherein: the front door (5) and the rear door (6) are both provided with filter screens (52) for ventilation and filtration, so that outside air can enter the cabinet body (1) from the filter screens (52).

7. The converter according to claim 6, characterized in that the outer walls of the power unit (2) and the filter unit (3) facing the rear door (6) are provided with air inlet holes (22), the power unit (2) and the filter unit (3) are provided with air inlet channels (23), and the air inlet channels (23) are communicated with the air inlet holes (22).

8. The converter of claim 6, wherein: the cabinet body (1) comprises a frame (11) and side plate assemblies (12) arranged on two sides of the frame (11);

the power unit (2), the filtering unit (3) and the control system (4) are all fixedly connected in the frame (11).

9. The current transformer of claim 8, wherein: sponge blocks (8) are arranged on the inner sides of the side plate assemblies (12), the front door (5) and the rear door (6).

10. The current transformer of claim 8, wherein: the side plate assembly (12) comprises a heat insulation plate (121) and an insulation protection plate (122) which are sequentially arranged from bottom to top, and the height of the heat insulation plate (121) is higher than that of the power unit (2) and the filtering unit (3).

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