阅读说明：本技术 一种防爆式大容量多电平全桥模组装置 (Explosion-proof type high-capacity multi-level full-bridge module device ) 是由 唐金昆 任成林 胡雨龙 周竞宇 甘运良 张中胜 高彪 于 2020-07-31 设计创作，主要内容包括：本发明涉及一种防爆式大容量多电平全桥模组装置,包括第一组件、第二组件和模组底板；第二组件固定在模组底板的一端；第一组件与第二组件对接后固定在模组底板的另一端,第一组件包括：模组外壳和部署在模组外壳内部的IGBT压接组件、晶闸管压接组件和旁路开关,所述IGBT压接组件包括压接式的IGBT元器件,IGBT的交流出线端分别引出IGBT出线铜排上和IGBT出线铜排下；在所述IGBT出线铜排上和IGBT出线铜排下的薄弱处分别固定加强铜排A和加强铜排B。本发明通过设计防护加强结构减小爆炸引起的形变量。(The invention relates to an explosion-proof high-capacity multi-level full-bridge module device which comprises a first assembly, a second assembly and a module bottom plate, wherein the first assembly is connected with the second assembly through a first connecting rod; the second assembly is fixed at one end of the module bottom plate; first subassembly and second subassembly butt joint after fix the other end at the module bottom plate, first subassembly includes: the module comprises a module shell, and an IGBT crimping component, a thyristor crimping component and a bypass switch which are arranged in the module shell, wherein the IGBT crimping component comprises a crimping type IGBT element, and an alternating current outlet end of the IGBT is respectively led out of an IGBT outlet copper bar and below the IGBT outlet copper bar; and a reinforcing copper bar A and a reinforcing copper bar B are respectively fixed at the weak positions on the IGBT wire outlet copper bar and below the IGBT wire outlet copper bar. The invention reduces the deformation quantity caused by explosion by designing the protection reinforcing structure.)

1. The utility model provides a many level of explosion-proof formula large capacity full-bridge module device, characterized by includes: the module comprises a first assembly, a second assembly and a module bottom plate; the second assembly is fixed at one end of the module bottom plate; the first component and the second component are fixed at the other end of the module bottom plate after being butted,

the first assembly includes: a module housing, and an IGBT crimping component, a thyristor crimping component and a bypass switch which are arranged in the module housing,

the IGBT crimping component comprises a crimping type IGBT, and alternating current outlet ends of the IGBT are respectively led out of the upper portion of an IGBT outlet copper bar and the lower portion of the IGBT outlet copper bar; a reinforcing copper bar A and a reinforcing copper bar B are respectively fixed on the IGBT outgoing copper bar and at the weak part below the IGBT outgoing copper bar,

two ends of the bypass switch are respectively fixed to the end surfaces of the IGBT outgoing copper bar and the end surfaces of the IGBT outgoing copper bar;

the thyristor crimping component comprises a crimping type thyristor, and a left outgoing line copper bar and a right outgoing line copper bar of the thyristor are respectively led out from two ends of the thyristor; the thyristor left outlet copper bar and the thyristor right outlet copper bar are respectively fixed on the IGBT outlet copper bar and on the end surface below the IGBT outlet copper bar;

the second assembly includes: and (4) a capacitor.

2. The explosion-proof multi-level full-bridge module device with large capacity according to claim 1, wherein a reinforcing copper bar A is crimped at the middle part of the IGBT outgoing line copper bar, and a reinforcing copper bar B is crimped at the middle part of the IGBT outgoing line copper bar.

3. The explosion-proof multi-level full-bridge module device with large capacity according to claim 1, wherein the left outgoing copper bar of the thyristor and the right outgoing copper bar of the thyristor are both soft-connected copper bars.

4. The explosion-proof high-capacity multi-level full-bridge module device as claimed in claim 3, wherein the left outgoing copper bar of the thyristor and the right outgoing copper bar of the thyristor are both flexible connection copper bars with corners.

5. An explosion-proof multi-level multi-capacity full-bridge module set according to claim 1, wherein the module housing comprises a module upper panel, a module right side panel, a module front panel, a module left side panel and a module rear panel, the module upper panel, the module right side panel, the module front panel, the module left side panel and the module rear panel are sequentially spliced to form a housing of the first module, and the module housing and the module bottom panel are spliced together to form a box-type structure.

6. The explosion-proof multi-level full-bridge module device with large capacity according to claim 5, wherein the module upper panel, the module right side plate and the module left side plate are all provided with oblong holes so as to realize the release of airflow pressure when the thyristor is in overvoltage breakdown.

7. The explosion-proof multi-level full-bridge module device with large capacity according to claim 5, wherein the module front panel comprises: a front upper panel and a front lower panel; wherein, preceding top panel includes: at least one first via; the IGBT outgoing copper bar is connected with the outside through at least one first through hole; the front lower panel includes: at least one second via; the lower part of the IGBT outgoing copper bar is connected with the outside through at least one second through hole.

Technical Field

The invention belongs to the technical field of direct current transmission, and particularly relates to an explosion-proof high-capacity multi-level full-bridge module device.

Background

In the operation of gentle straight converter valve, under the condition that single module unit broke down, through closed bypass switch, with the module unit bypass of trouble to guarantee the normal operating of whole gentle straight converter valve.

However, if the bypass switch fails to operate, the module unit which causes the fault cannot bypass through the bypass switch, and under the condition, the capacitor of the module unit is continuously charged by the current of the flexible direct current converter valve until the module unit is exploded due to overvoltage, and the fault module unit is in an open circuit state, so that the flexible direct current converter valve is stopped.

The measure for solving the problem that the soft and straight converter valve is stopped due to the bypass switch failure is to connect a thyristor in parallel at the alternating current output port of the module unit, and after the bypass switch is led out and failed, when the capacitor voltage of the module unit is increased to the breakdown voltage of the thyristor, the thyristor can be subjected to overvoltage breakdown, so that the failed module unit is in a short-circuit failure mode, and the soft and straight converter valve is ensured to continue to normally operate. When the thyristor overvoltage breakdown, the capacitor discharges through the thyristor and the short circuit of the connecting copper bar, and great impact electrodynamic force is generated inside the module, if the module structure is designed to be stable enough, the module structural part deforms when the thyristor breaks down, and the deformed metal piece influences the safety of the module units adjacent to the two sides, so that the fault is enlarged.

Therefore, in order to deal with the above situation, in the case of overvoltage breakdown of the thyristor of a single module unit, it should be ensured that the peripheral module is not affected, so the explosion-proof design of the module unit becomes an important point of product design.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides an explosion-proof high-capacity multi-level full-bridge module device, which is designed with a protection reinforcing structure to reduce the deformation caused by explosion.

In order to solve the above technical problem, the present invention provides an explosion-proof high-capacity multi-level full bridge module device, which is characterized by comprising: the module comprises a first assembly, a second assembly and a module bottom plate; the second assembly is fixed at one end of the module bottom plate; the first component and the second component are fixed at the other end of the module bottom plate after being butted,

the first assembly includes: a module housing, and an IGBT crimping component, a thyristor crimping component and a bypass switch which are arranged in the module housing,

the IGBT crimping component comprises a crimping type IGBT component, and alternating current outlet ends of the IGBT are respectively led out of the upper portion of an IGBT outlet copper bar and the lower portion of the IGBT outlet copper bar; a reinforcing copper bar A and a reinforcing copper bar B are respectively fixed on the IGBT outgoing copper bar and at the weak part below the IGBT outgoing copper bar,

two ends of the bypass switch are respectively fixed to the end surfaces of the IGBT outgoing copper bar and the end surfaces of the IGBT outgoing copper bar;

the thyristor crimping component comprises a crimping type thyristor, and a left outgoing line copper bar and a right outgoing line copper bar of the thyristor are respectively led out from two ends of the thyristor; the thyristor left outlet copper bar and the thyristor right outlet copper bar are respectively fixed on the IGBT outlet copper bar and on the end surface below the IGBT outlet copper bar;

the second assembly includes: and (4) a capacitor.

Furthermore, a reinforcing copper bar A is in compression joint with the middle part of the IGBT outgoing line copper bar, and a reinforcing copper bar B is in compression joint with the middle part of the IGBT outgoing line copper bar.

Furthermore, the left outgoing copper bar of the thyristor and the right outgoing copper bar of the thyristor are both soft-connected copper bars.

Furthermore, the thyristor left line-outgoing copper bar and the thyristor right line-outgoing copper bar are both flexible connection copper bars with corners.

Further, the module shell includes module top panel, module right side board, module front panel, module left side board and module rear panel, and the module top panel splices the shell that constitutes first subassembly with module right side board, module front panel, module left side board and module rear panel in proper order, and the module shell forms box structure with the concatenation of module bottom plate together.

Furthermore, the module upper panel, the module right side plate and the module left side plate are all provided with long round holes, so that the release of airflow pressure during overvoltage breakdown of the thyristor is realized.

Further, the module front panel includes: a front upper panel and a front lower panel; wherein, preceding top panel includes: at least one first via; the IGBT outgoing copper bar is connected with the outside through at least one first through hole; the front lower panel includes: at least one second via; the lower part of the IGBT outgoing copper bar is connected with the outside through at least one second through hole.

Compared with the prior art, the invention has the following beneficial effects: according to the device, pressure airflow is released through the openings of the panels, the explosion mechanical force of the thyristor is attenuated through the deformation of the two outgoing line copper bars of the thyristor, the deformation of the IGBT outgoing line copper bars can be controlled by adding the reinforcing copper bars at weak positions, the integrity of a module under the condition of overvoltage breakdown of the thyristor is finally ensured, and the reliable operation of the whole flexible-straight converter valve product is ensured.

Drawings

FIG. 1 is a schematic view of the module structure of the present invention;

FIG. 2 is a side view of the modular construction of the present invention;

fig. 3 is a schematic structural diagram of an IGBT crimping assembly and a thyristor assembly according to the present invention;

FIG. 4 is a schematic structural diagram of an IGBT crimp assembly of the present invention;

fig. 5 is a schematic structural diagram of the thyristor press-connection assembly of the present invention.

Reference numerals: 101. a module upper panel 102, a module right side panel 103, a module bottom panel 104, a module front panel 105, a module left side panel 106 and a capacitor;

201. the IGBT crimping component 202 is arranged on the IGBT outgoing line copper bar, and 203 is arranged below the IGBT outgoing line copper bar;

301. the thyristor voltage-connected component 302, the thyristor left outlet copper bar 303 and the thyristor right outlet copper bar; 304. a water-cooled radiator;

401. a bypass switch;

501. reinforcing copper bars A, 502 and reinforcing copper bars B.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present patent application, it is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In the description of the present patent, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present patent and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present patent. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present patent application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present patent can be understood in a specific case by those skilled in the art.

Fig. 1 is a schematic structural diagram of an explosion-proof large-capacity multi-level full-bridge module device according to an embodiment of the present invention, where the device includes: a first component, a second component and a module chassis 103; the second component is fixed at one end of the module bottom plate 103; the first component and the second component are butted and then fixed at the other end of the module bottom plate 103,

the first assembly includes: a module housing and an IGBT crimp assembly 201, a thyristor crimp assembly 301 and a bypass switch 401 disposed within the module housing,

the second assembly includes: a capacitor 106.

The device has compact distribution and arrangement of parts, and reduces the space occupation of the device.

In the embodiment of the present invention, referring to fig. 3, the IGBT crimping assembly 201 includes a crimping type IGBT component, the IGBT component has a large capacity, the ac outgoing line end of the IGBT is led out from the upper side 202 of the IGBT outgoing line copper bar and the lower side 203 of the IGBT outgoing line copper bar, that is, the two outgoing line copper bars are led out from the C end and the E end of the IGBT, respectively, and the modules are electrically connected in series through the two outgoing line copper bars.

The IGBT inside the IGBT crimping module 201 is electrically connected to the capacitor 106 (realized by the laminated busbar in the module), that is, the capacitor is arranged at both ends of the IGBT, and the capacitor mainly has a filtering function.

The both ends of bypass switch 401 are fixed respectively to 202 on the IGBT outlet copper bar and the IGBT outlet copper bar terminal surface of 203 down (electrical connection is just through terminal surface direct contact connection), realize that bypass switch 401 connects in parallel at the IGBT both ends, and the switching action plays the bypass effect under the module damage condition, realizes that the damage of single module does not influence the normal operating of whole product.

According to the research, when the thyristor explodes, the upper side 202 of the IGBT outgoing copper bar and the lower side 203 of the IGBT outgoing copper bar are easy to deform, and in order to reduce the deformation, the reinforcing copper bar A501 and the reinforcing copper bar B502 are respectively fixed at the weak positions of the upper side 202 of the IGBT outgoing copper bar and the lower side 203 of the IGBT outgoing copper bar, so that the local strength is increased, and the deformation of the upper side 202 of the IGBT outgoing copper bar and the deformation of the lower side 203 of the IGBT outgoing copper bar during the thyristor explosion are reduced.

In the preferred embodiment of the present invention, as shown in fig. 4, the upper side 202 of the IGBT outgoing copper bar and the lower side 203 of the IGBT outgoing copper bar are in a long rectangular shape, and the middle of the outgoing copper bar is a weak point, so the middle portion of the upper side 202 of the IGBT outgoing copper bar is crimped with the reinforcing copper bar a501, the size of the reinforcing copper bar a501 is 125mm × 110mm × 4mm, the middle portion of the lower side 203 of the IGBT outgoing copper bar is crimped with the reinforcing copper bar B502, and the size of the reinforcing copper bar B502 is 125mm × 110mm × 4 mm.

In the embodiment of the present invention, referring to fig. 5, the thyristor crimping component 301 includes a crimping type thyristor, and a left outgoing line copper bar 302 and a right outgoing line copper bar 303 of the thyristor are respectively led out from two ends of the thyristor; the thyristor left outgoing copper bar 302 and the thyristor right outgoing copper bar 303 are respectively fixed to the end faces of the upper side 202 of the IGBT outgoing copper bar and the lower side 203 of the IGBT outgoing copper bar, the thyristor is connected to two ends of the IGBT in parallel, and the bypass effect is achieved.

And a water-cooling radiator 304 is arranged on the rear end face of the thyristor and used for radiating heat of the thyristor component.

In the preferred embodiment of the present invention, the left outlet copper bar 302 and the right outlet copper bar 303 of the thyristor assembly are both flexible connection copper bars, as shown in fig. 5, the flexible connection copper bars with corners (for example, the turning radius is 13 mm) are used. Two benefits of flexible coupling, one is that flexible coupling can reduce the destructive power to external when exploding, and the second is that to reduce the machining precision requirement, easy to assemble, when the thyristor overvoltage breakdown short circuit became invalid, the deformation through the left copper bar 302 of being qualified for the next round of competitions of thyristor and the right copper bar 303 of being qualified for the next round of competitions of thyristor reduces the effort of impact force 202 on the IGBT copper bar of being qualified for the next round of competitions and 203 under the IGBT copper bar of being qualified for the next round of.

In the embodiment of the present invention, referring to fig. 1 and 2, the module housing includes a module upper panel 101, a module right side panel 102, a module front panel 104, a module left side panel 105, and a module rear panel (not shown in the drawings), the module upper panel 101, the module right side panel 102, the module front panel 104, the module left side panel 105, and the module rear panel are sequentially spliced to form a housing of the first component, and the module housing and the module bottom panel 103 are spliced together to form a box structure to protect the first component inside.

In the preferred embodiment of the present invention, a large number of oblong holes are formed in the module upper panel 101, the module right side plate 102 and the module left side plate 105, so as to release the airflow pressure when the thyristor is over-voltage broken.

In a preferred embodiment of the present invention, the modular front panel 104 comprises: a front upper panel and a front lower panel; wherein, preceding top panel includes: at least one first via; the IGBT outgoing copper bar 202 is connected with the outside through at least one first through hole; the front lower panel includes: at least one second via; the lower side 203 of the IGBT outgoing copper bar is connected with the outside through at least one second through hole.

As shown in fig. 2, the front upper panel includes a through hole, which can be used to pass through the IGBT outgoing copper bar 202 as an opening for connecting the IGBT crimping assembly with the outside. The front lower panel comprises a through hole which can be used for passing through the lower side 203 of the IGBT outgoing line copper bar and is used as an opening for connecting the IGBT crimping component with the outside. It should be noted that, the module front panel 104 is divided into the front upper panel and the front lower panel so that when the IGBT crimping assembly is subjected to operations such as disassembly, assembly, maintenance and the like, only the panel in front of the corresponding position needs to be disassembled, the whole module front panel does not need to be operated, the workload is reduced, and it is ensured that other devices are not affected.

The device of the invention has the beneficial effects that: under the thyristor overvoltage breakdown condition, pressure airflow can be released through each panel trompil, and thyristor explosion mechanical force obtains the decay through two outlet copper bar deformations of thyristor, and the IGBT outlet copper bar increases through the weak department and strengthens the copper bar and can realize that deformation is controllable, finally guarantees the integrality of module under the thyristor overvoltage breakdown condition, guarantees the reliable operation of whole gentle straight converter valve product.

The installation process of the explosion-proof high-capacity multi-level full-bridge module device comprises the following steps:

first, the capacitor 106 is fixed to the module chassis 103.

And then, crimping devices such as the upper side 202 of the IGBT outgoing copper bar, the lower side 203 of the IGBT outgoing copper bar, the IGBT and the like to complete the IGBT crimping assembly 201.

Next, the thyristor assembly 301, the IGBT crimping assembly 201, and the bypass switch 401 are fixed to the module substrate 103.

And then, the reinforcing copper bar A501 and the reinforcing copper bar B502 are fixedly installed on the IGBT outgoing copper bar 202 and below the IGBT outgoing copper bar 203.

And finally, completing all wiring work, completing the single electrical test work of the module unit, and completing all work of the single module unit.

The module unit can be transported to the site independently, and can also be integrally transported to the engineering site after being fixed to a valve section (the module is finally fixed to the valve section in the site, generally 6 modules form one valve section, and one valve tower comprises N valve sections).

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.