Direct-current bus voltage stabilizer equipment

Abstract

The utility model relates to the field of voltage stabilization, in particular to direct current bus voltage stabilization device equipment, which comprises a bottom plate seat, a chopping cabinet unit and an energy consumption resistor cabinet unit, and is characterized in that the bottom plate seat is divided into two independent areas which are respectively provided with the chopping cabinet unit and the energy consumption resistor cabinet unit; a main loop adopts a topological structure in which multiple branch chopper circuits are connected in series and energy-consuming resistors are connected in series in groups, and excess energy of a direct-current bus is consumed through a chopper cabinet unit and an energy-consuming resistor cabinet unit so as to keep the voltage of the direct-current bus stable; the chopper cabinet unit adopts a self-heat dissipation mode, the energy-consuming resistor cabinet unit adopts forced air cooling heat dissipation, a heat dissipation fan is arranged on a bottom plate seat at the bottom end of the energy-consuming resistor cabinet unit, an independent heat dissipation air channel is formed by a resistor cabinet, heat is directly discharged from the top of the cabinet, and the problem that a large amount of heat generated by an energy-consuming resistor in the process of consuming excess energy of a direct-current bus is difficult to dissipate is solved. And a middle maintenance channel is reserved on the bottom plate seat, so that the chopper cabinet unit and the energy consumption resistor cabinet unit are convenient to overhaul and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of voltage stabilizing equipment, especially to a direct current bus voltage stabilizing device. BACKGROUND

[0002] Green hydrogen is obtained by decomposing water molecules into hydrogen and oxygen through an electrochemical process at the cathode and anode using direct current generated by renewable energy (mainly wind and light). To reduce the impact and disturbance of new energy wind and light hydrogen production projects on existing power grids, more projects in the future will adopt a pure off-grid hydrogen production mode. When hydrogen is produced in a pure off-grid mode, the direct current bus voltage will exceed the upper limit value when the energy suddenly exceeds the load consumption capacity due to the lack of support from the large power grid. There is no excess equipment to consume, and the direct current bus voltage exceeds the allowed operating range, which can easily cause equipment damage. To ensure that the direct current bus voltage is within the allowed operating range, the chopper function of the direct current bus voltage stabilizing device is usually enabled, and the direct current bus energy is consumed through resistors to maintain the stability of the direct current bus voltage. In existing direct current bus voltage stabilizing devices, there are many chopper and resistor consumption branches. The source side is usually outdoors, and the chopper cabinet and resistor cabinet are usually separated. Maintenance and maintenance are not convenient, and the degree of integration needs to be improved. SUMMARY

[0003] The utility model provides a kind of direct current bus voltage stabilizing device equipment, can consume the energy of source side burst exceeding consumption side, keep direct current bus voltage stable, the design of chopper rail unit self-cooling+energy consumption resistor cabinet unit forced air cooling mode, good heat dissipation effect, satisfy the heat dissipation required, and integrated arrangement mode matching chopper and energy consumption resistor, it is convenient to overhaul and maintenance.

[0004] The utility model provides a kind of direct current bus voltage stabilizing device equipment, including: bottom seat, chopper cabinet unit and energy consumption resistor cabinet unit, bottom seat is equipped with intermediate maintenance passageway;

[0005] Chopper cabinet unit includes chopper control single cabinet, chopper incoming line single cabinet and multiple chopper branch single cabinets;Chopper cabinet unit is arranged on the side of bottom seat in two rows in single cabinet, and it is opposite to be located at the both sides of intermediate maintenance passageway;Energy consumption resistor cabinet unit includes multiple energy consumption resistor single cabinets, and multiple energy consumption resistor single cabinets are arranged on the other side of bottom seat in two rows, and it is opposite to be located at the both sides of intermediate maintenance passageway;Energy consumption resistor single cabinet mounting position on bottom seat is also equipped with cooling fan, to be used for energy consumption resistor single cabinet heat dissipation.

[0006] Further, control room elements are provided in the chopper control single cabinet;The first controller, two power modules and eight voltage balancing resistors are installed in the chopper incoming line single cabinet.

[0007] Further, the second controller and four power modules are provided in the chopper branch single cabinet.

[0008] Further, the controller and the power module are supported by the insulating beam arranged on the cabinet body.

[0009] Further, the power module is internally provided with a power module, and the power module is provided with a finned radiator, and the mounting bottom plate, the side plate and the top plate of the power module are provided with heat dissipation holes.

[0010] Further, the energy consumption resistor single cabinet has a vertical heat dissipation channel, and the energy consumption resistor module is arranged in the heat dissipation channel, the bottom end of the heat dissipation channel is connected with the heat dissipation fan as an air inlet end, and the top end of the heat dissipation channel is open as an air outlet end; the energy consumption resistor module comprises two IGBT energy consumption resistors, and the upper two BANKs form a group of resistors, and the lower two BANKs form a group of resistors.

[0011] Further, in the energy consumption resistor single cabinet, the two IGBT energy consumption resistors are connected with the cabinet body through the insulating seat and the insulating beam.

[0012] Further, the bottom plate seat is provided with an isolation cabin door between the chopper cabinet unit and the energy consumption resistor cabinet unit.

[0013] The above technical scheme of the utility model has the following advantages:

[0014] The DC bus voltage stabilizing device equipment of the application comprises a bottom plate seat, a chopper cabinet unit and an energy consumption resistor cabinet unit, the bottom plate seat is provided with an intermediate maintenance channel; the bottom plate seat is divided into two independent areas, and the chopper cabinet unit and the energy consumption resistor cabinet unit are arranged respectively; the main circuit adopts a topology structure of multi-branch chopper circuit series connection and energy consumption resistor grouping series connection, the chopper cabinet unit and the energy consumption resistor cabinet unit are used to consume the excess energy of the DC bus, so as to maintain the stability of the DC bus voltage; the chopper cabinet unit adopts a self-heat dissipation mode, the energy consumption resistor cabinet unit adopts forced air cooling heat dissipation, the bottom plate seat at the bottom end of the energy consumption resistor cabinet unit is provided with a heat dissipation fan, and the resistor cabinet forms an independent heat dissipation air duct, which directly discharges from the top of the cabinet, thereby solving the problem that a large amount of heat generated by the energy consumption resistor during the process of consuming the excess energy of the DC bus is difficult to dissipate; in addition, the bottom plate seat is provided with an intermediate maintenance channel, which facilitates the maintenance of the chopper cabinet unit and the energy consumption resistor cabinet unit. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0016] Figure 1 It is a structure schematic view of a DC bus voltage stabilizing device equipment of the embodiment.

[0017] Figure 2 For Figure 1 Structure diagram of the chopping control single cabinet and the chopping incoming line single cabinet in the chopping cabinet unit;

[0018] Figure 3 For Figure 1 Structure diagram of the chopping branch single cabinet in the chopping cabinet unit;

[0019] Figure 4 For Figure 1 Structure diagram of the energy consumption resistance single cabinet in the energy consumption resistance cabinet unit; DETAILED DESCRIPTION

[0020] In order to make the skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or 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 indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly and specifically limited.

[0024] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are merely used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the disclosed technical content.

[0025] Referring to Figures 1 to 4 The utility model provides a kind of DC bus voltage stabilizing device equipment, comprising: bottom plate seat, chopping cabinet unit and energy dissipation resistance cabinet unit, middle maintenance passage is equipped on bottom plate seat;

[0026] Chopping cabinet unit includes chopping control single cabinet, chopping incoming line single cabinet and multiple chopping branch single cabinet;Single cabinet in chopping cabinet unit is arranged on the side of bottom plate seat in two rows, and is located opposite on the two sides of middle maintenance passage;Energy dissipation resistance cabinet unit includes multiple energy dissipation resistance single cabinets, and multiple energy dissipation resistance single cabinets are arranged on the other side of bottom plate seat in two rows, and are located opposite on the two sides of middle maintenance passage;Heat dissipation fan is further provided on the energy dissipation resistance single cabinet mounting position on bottom plate seat, to be used for energy dissipation resistance single cabinet heat dissipation.

[0027] In the above scheme, bottom plate seat is divided into two independent areas, and chopping cabinet unit and energy dissipation resistance cabinet unit are arranged respectively;Main circuit adopts the topology structure of multiple branch chopping circuit series connection and energy dissipation resistance grouping series connection, and the excess energy of DC bus is consumed by chopping cabinet unit and energy dissipation resistance cabinet unit to maintain the stability of DC bus voltage;Chopping cabinet unit adopts self-heat dissipation mode, and energy dissipation resistance cabinet unit adopts forced air cooling heat dissipation, and heat dissipation fan is arranged on the bottom plate seat at the bottom end of energy dissipation resistance cabinet unit, and independent heat dissipation air duct is formed in resistance cabinet, and is directly discharged from the top of cabinet, to solve the problem that a large amount of heat is difficult to dissipate in the process of consuming the excess energy of DC bus;In addition, middle maintenance passage is reserved on bottom plate seat, to facilitate the overhaul and maintenance of chopping cabinet unit and energy dissipation resistance cabinet unit.

[0028] Further, control room elements are provided in the chopping control single cabinet;First controller, two power modules and eight voltage-sharing resistors are installed in the chopping incoming line single cabinet.

[0029] Further, second controller and four power modules are provided in the chopping branch single cabinet.

[0030] Further, the controller and power module are supported by an insulating beam and arranged in the cabinet body.

[0031] Further, the power module is built-in the power module, the power module is provided with a fin type radiator, and the mounting bottom plate, side plate and top plate of the power module are provided with heat dissipation holes. The power module is naturally cooled by the fin type radiator, and the mounting bottom plate, side plate and top plate of the power module are provided with heat dissipation holes, so that the heat generated by the power module in the module is released through the heat dissipation holes.

[0032] Further, the energy consumption resistor single cabinet has a vertical heat dissipation channel, the energy consumption resistor module is arranged in the heat dissipation channel, the bottom end of the heat dissipation channel is connected with a heat dissipation fan as an air inlet end, and the top end of the heat dissipation channel is open as an air outlet end; the energy consumption resistor module includes two IGBT energy consumption resistors, two upper BANKs form a group of resistors, and two lower BANKs form a group of resistors.

[0033] In the pure off-grid hydrogen production mode, the voltage stabilizing device of the application maintains the stability of the DC bus voltage by means of the chopper function of the chopper cabinet unit and the energy consumption of the energy consumption resistor in the energy consumption resistor cabinet unit, which consumes the energy exceeding the energy consumption side. The heat dissipation plate with fins in the chopper cabinet unit is used for dissipating heat of the power module, and the mounting bottom plate, side plate and top plate of the power module are provided with heat dissipation holes, so that the heat generated by the power module in the module is released through the heat dissipation holes; the energy consumption resistor cabinet unit adopts forced air cooling mode, and the heat dissipation fan is arranged on the bottom plate seat at the bottom of the cabinet body, the cabinet body forms an independent air duct, and air is directly discharged from the top of the cabinet body; the self-cooling + forced air cooling mode meets the heat dissipation requirement and matches the integrated arrangement mode of the chopper and the energy consumption resistor, which is convenient for maintenance and maintenance.

[0034] Further, in the energy consumption resistor single cabinet, the two IGBT energy consumption resistors are connected with the cabinet body through the insulating seat and the insulating beam.

[0035] Further, the isolation cabin door is arranged between the chopper cabinet unit and the energy consumption resistor cabinet unit on the bottom plate seat.

[0036] It should be noted that, Figure 1 The component structure design of the DC bus voltage stabilizing device includes: 1, the chopper cabinet unit, 2, the energy consumption resistor cabinet unit, 3, the isolation cabin door, 4, the bottom plate seat, 101, the chopper control single cabinet, 102, the chopper incoming line single cabinet, 103, the chopper branch single cabinet.

[0037] Figure 2 The component structure design of the chopper control single cabinet and the chopper incoming line single cabinet includes: 1, the control room element, 2, the first controller, 3, the power module, 4, the voltage sharing resistor.

[0038] Figure 3 The component structure design of the chopper branch single cabinet includes: 1, the power module, 2, the second controller, 3, the insulating beam.

[0039] Figure 4 The component structure design of the energy dissipation resistor single cabinet shown comprises: 1, energy dissipation resistor, 2, insulating seat, 3, heat dissipation fan.

[0040] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will accord with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A DC bus voltage stabilizing device apparatus, characterized by, The utility model relates to a kind of energy dissipation cabinet and chopping cabinet unit, including: Bottom seat, chopping cabinet unit and energy dissipation cabinet unit, and intermediate maintenance passage is equipped on the bottom seat; Chopping cabinet unit includes chopping control single cabinet, chopping incoming line single cabinet and multiple chopping branch single cabinet;Single cabinet in chopping cabinet unit is arranged in two rows in one side of bottom seat, and is located opposite in the two sides of intermediate maintenance passage;Energy dissipation cabinet unit includes multiple energy dissipation single cabinets, and multiple energy dissipation single cabinets are arranged in two rows in the other side of bottom seat, and are located opposite in the two sides of intermediate maintenance passage;Heat dissipation fan is further equipped on the mounting position of energy dissipation single cabinet on the bottom seat, to be used for energy dissipation single cabinet heat dissipation.

2. The DC bus voltage regulation apparatus of claim 1, wherein Chopping control single cabinet is equipped with control chamber element;Chopping incoming line single cabinet is installed with first controller, two power modules and eight voltage-sharing resistors.

3. The DC bus voltage regulation apparatus of claim 2, wherein Second controller and four power modules are equipped in chopping branch single cabinet.

4. The DC bus voltage regulation apparatus of claim 3, wherein Controller and power module are supported by insulating beam and arranged in cabinet.

5. The DC bus voltage regulation apparatus of claim 3, wherein Power module is built-in power module, and finned radiator is equipped on power module, and the mounting bottom plate, side plate and top plate of power module are all provided with heat dissipation hole.

6. The DC bus voltage stabilizing device according to any one of claims 1 to 5, wherein Energy dissipation single cabinet has vertical heat dissipation channel, and energy dissipation module is equipped in heat dissipation channel, and heat dissipation channel bottom end is connected with heat dissipation fan as air inlet end;Heat dissipation channel top end is open as air outlet end;Energy dissipation module includes two-way IGBT energy dissipation resistor, and upper two BANK form a group of resistors, and lower two BANK form a group of resistors.

7. The DC bus voltage regulation apparatus of claim 6, wherein In energy dissipation single cabinet, two-way IGBT energy dissipation resistor is connected with cabinet by insulating seat and insulating beam.

8. The apparatus of any of claims 1-5, 7, wherein, Isolation cabin door is arranged between chopping cabinet unit and energy dissipation cabinet unit on the bottom seat.

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