Explosion-proof structure of flexible direct current converter valve power module
By adopting a parallel copper busbar and insulation plate design in the power module of the flexible DC converter valve, the energy release path is changed, which solves the problems of high cost and difficult maintenance of existing explosion-proof designs and achieves more efficient explosion-proof performance and stability.
Patent Information
- Application Number
- CN202423314518.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The explosion-proof design of existing flexible DC converter power modules relies on physical protection, resulting in high costs, difficult maintenance, and limited explosion-proof capabilities, making it unable to effectively cope with the energy impact released by the discharge of large capacitors.
The parallel copper busbar design changes the energy release path, reduces the current and electrodynamic force of a single copper busbar by shunting, and improves explosion-proof performance by combining it with insulating plate protection.
It reduces explosion-proof costs, simplifies maintenance, improves the overall stability and reliability of the module, and prevents damage to pipelines from power device casing fragments.
Smart Images
Figure CN223680980U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of flexible direct current transmission converter valve, specifically relates to a kind of explosion-proof structure of flexible converter valve power module. BACKGROUND
[0002] With more and more clean energy direct current sending projects using flexible direct current transmission technology, it has the technical advantages of no commutation failure risk, no reactive power compensation, no dependence on active power grid, especially meets the demand of new power system dominated by new energy for power technology flexibility and controllability, and the technical advantages and application prospect in the field of clean energy power transmission, offshore wind power grid connection, direct current grid construction are particularly prominent.
[0003] The 5kA converter valve developed by the first application of 4.5kV / 5kA level IGBT device can be used for ±800kV / 8000MW converter valve project, and can better meet the demand of large-scale new energy long-distance high-capacity direct current transmission sending project and large-scale development and utilization of offshore wind farm under the double-carbon target.
[0004] During the operation of the converter valve, under the extreme conditions of bypass switch refusal, upper and lower bridge arm short circuit, etc., the capacitor of the valve power module will short-circuit discharge, and will release a huge amount of energy, which will cause a huge impact on the power module discharge circuit and form an explosion. In order to ensure that the converter valve system can operate normally under such extreme conditions, the power module must have good explosion-proof performance to ensure that the module can still bypass reliably and will not damage other parts of the converter valve after the capacitor short-circuit discharge forms a huge impact.
[0005] Compared with traditional 2kA and 3kA power modules, the capacitance of 5kA power module is larger, the capacitor discharge current is larger under extreme conditions, the released energy is larger, and the explosion-proof design requirement of power module is higher.
[0006] The existing explosion-proof design usually adds physical protection measures to protect the loop copper bar, cooling pipeline, etc., for example, increasing the number and strength of protective baffles, using physical protection to strengthen to cope with the impact caused by large current, and using baffles to isolate the splash that may be produced after the explosion of power device or copper bar. This explosion-proof design method can indeed play a certain protective role, but at the same time, it also has many shortcomings, and the explosion-proof effect of 5kA level power module is limited. There are mainly the following problems:
[0007] (1) High protection cost: the existing explosion-proof design relies on increasing physical protection and structural strength, which will increase the cost of power module. Especially in large-capacity systems, high-strength protective materials and complex mechanical structure design are needed, and the cost increase will be greater.
[0008] (2) Maintenance difficulty: the mechanical protection design of the power module is complex, and the system maintenance and repair become more difficult, which is not conducive to the reliability maintenance and fault handling in long-term operation.
[0009] (3) Limitation of explosion-proof capability: as the capacity of the power module becomes larger and larger, the energy released by the capacitor discharge becomes larger and larger, and the protection difficulty will also become higher and higher. The mechanical protection is limited by the physical properties of the material itself, and there will always be a limit that cannot be effectively protected.
[0010] (4) Single explosion-proof design idea and uncertainty: the existing explosion-proof design belongs to "treating the symptoms but not the disease", and does not fundamentally solve the problem of energy release, but only prevents it, and does not really solve the problem. Even if the protection is more thorough, there is still uncertainty.
[0011] In summary, the existing explosion-proof design excessively relies on physical protection and the stacking of materials, rather than optimizing the explosion-proof design from the perspective of energy release, resulting in problems such as increased cost, maintenance difficulty and low reliability. Practical new type content
[0012] The utility model aims at overcoming the problem of poor explosion-proof performance of the flexible direct current converter valve power module, and proposes an explosion-proof structure of the flexible direct current converter valve power module.
[0013] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0014] The explosion-proof structure of the flexible straight converter valve power module comprises an IGBT press string structure, a DC side composite busbar, an AC output side copper bar and an insulating plate, the IGBT press string structure is installed outside the IGBT press string, the DC side composite busbar is installed on the first side of the IGBT press string, the AC output side copper bar is installed on the second side and the third side of the IGBT press string, and the insulating plate is installed on the fourth side of the IGBT press string; the IGBT press string comprises power devices and water-cooled radiators, the power devices and the water-cooled radiators are alternately arranged, the power devices comprise IGBTs and diodes, the water-cooled radiators are connected with pipelines, and the pipelines are installed on the second side and the fourth side of the IGBT press string; the water-cooled radiators comprise a first water-cooled radiator, a second water-cooled radiator, a third water-cooled radiator, a fourth water-cooled radiator, a fifth water-cooled radiator, a sixth water-cooled radiator, a seventh water-cooled radiator, an eighth water-cooled radiator, a ninth water-cooled radiator and a tenth water-cooled radiator arranged in sequence; the AC output side copper bar comprises a first AC output side AC1 copper bar and a second AC output side AC2 copper bar, the first water-cooled radiator, the third water-cooled radiator and the fifth water-cooled radiator are connected with the first AC output side AC1 copper bar, and the sixth water-cooled radiator, the eighth water-cooled radiator and the tenth water-cooled radiator are connected with the second AC output side AC2 copper bar; the second water-cooled radiator and the ninth water-cooled radiator are connected with the positive pole of the DC side composite busbar, and the fourth water-cooled radiator and the seventh water-cooled radiator are connected with the negative pole of the DC side composite busbar.
[0015] Further, the first AC output side AC1 copper bar comprises a first copper bar, a second copper bar and a third copper bar, and the first water-cooled radiator, the third water-cooled radiator and the fifth water-cooled radiator are connected with the first copper bar, the second copper bar and the third copper bar simultaneously.
[0016] Further, the first copper bar and the second copper bar are installed on the third side of the IGBT press string, and the first copper bar is connected with the second copper bar and the third copper bar in parallel.
[0017] Further, the second AC output side AC2 copper bar comprises a fourth copper bar, a fifth copper bar and a sixth copper bar, and the sixth water-cooled radiator, the eighth water-cooled radiator and the tenth water-cooled radiator are connected with the fourth copper bar, the fifth copper bar and the sixth copper bar simultaneously.
[0018] Further, the fourth copper bar and the fifth copper bar are installed on the third side of the IGBT press string, and the fourth copper bar is connected with the fifth copper bar and the sixth copper bar in parallel.
[0019] Further, the third copper bar and the sixth copper bar are installed on the second side of the IGBT press string and are used for shunting and protecting the pipelines.
[0020] Further, the DC side composite busbar comprises a positive busbar and a negative busbar, the positive busbar and the negative busbar are installed on the first side surface of the IGBT press string, the second water-cooled radiator and the ninth water-cooled radiator are connected with the positive busbar, and the fourth water-cooled radiator and the seventh water-cooled radiator are connected with the negative busbar.
[0021] Further, the fourth side surface of the IGBT press string is provided with a negative copper bar, the fourth water-cooled radiator and the seventh water-cooled radiator are connected with the negative copper bar, and the negative busbar is connected with the negative copper bar.
[0022] Further, the insulation plate comprises a first insulation plate, a second insulation plate and a third insulation plate, the first water-cooled radiator, the second water-cooled radiator and the third water-cooled radiator are connected with the first insulation plate, the second insulation plate is arranged outside the negative copper bar, the fourth water-cooled radiator and the seventh water-cooled radiator are connected with the second insulation plate, and the eighth water-cooled radiator, the ninth water-cooled radiator and the tenth water-cooled radiator are connected with the third insulation plate.
[0023] Further, the IGBT press string structure comprises a first structure, a second structure and a third structure, the IGBT press string structure is installed between the first structure and the second structure, and the third structure is installed between the first structure and the second structure.
[0024] Compared with the prior art, the IGBT press string structure has the following beneficial technical effects:
[0025] The explosion-proof structure of the flexible direct current converter valve power module changes the energy release path, fundamentally reduces the current and the electric force borne by the single copper bar, thereby reducing the electric force borne by the single copper bar, avoiding excessive concentration of local electric force, ensuring that the stress of each component is controllable, improving the explosion-proof performance, and belonging to the method of treating the symptoms and the root cause. By means of shunting, the release of current and capacity is dispersed, rather than relying on the strengthening method to achieve the purpose of explosion-proof, which is low in cost, good in effect, does not introduce more parts for protection, and makes installation and maintenance convenient. The parallel copper bars for shunting are reasonably arranged, so that the role of each copper bar is not only to share the current, but also to improve the overall stability of the structure, and prevent the power device shell fragments from damaging the pipeline. The explosion-proof performance of the module can be improved by changing the energy release path, thereby improving the overall operation reliability of the converter valve. BRIEF DESCRIPTION OF DRAWINGS
[0026] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and scale sizes of the components in the drawings are only illustrative and are used to help understand the present disclosure, and are not specific limitations on the shapes and scale sizes of the components. In the drawings:
[0027] Figure 1 The utility model discloses a kind of power module main circuit schematic diagram of the explosion-proof structure of flexible direct current valve power module.
[0028] Figure 2 The utility model discloses a first schematic diagram of IGBT press string of the explosion-proof structure of flexible direct current valve power module.
[0029] Figure 3 The utility model discloses a second schematic diagram of IGBT press string of the explosion-proof structure of flexible direct current valve power module.
[0030] Figure 4 The utility model discloses a schematic diagram of AC row parallel connection of the explosion-proof structure of flexible direct current valve power module.
[0031] Figure 5 The utility model discloses a schematic diagram of DC negative pole row parallel connection of the explosion-proof structure of flexible direct current valve power module.
[0032] Figure 6 The utility model discloses a schematic diagram of pipeline insulation board protection of the explosion-proof structure of flexible direct current valve power module.
[0033] Among them, first water cooling radiator 1, second water cooling radiator 2, third water cooling radiator 3, fourth water cooling radiator 4, fifth water cooling radiator 5, sixth water cooling radiator 6, seventh water cooling radiator 7, eighth water cooling radiator 8, ninth water cooling radiator 9, tenth water cooling radiator 10, IGBT press string structure piece 11, first structure piece 1101, second structure piece 1102, third structure piece 1103, DC side composite busbar 12, positive busbar 1201, negative busbar 1202, first copper row 1301, second copper row 1302, third copper row 1303, fourth copper row 1401, fifth copper row 1402, sixth copper row 1403, pipeline 15, negative pole copper row 16. DETAILED DESCRIPTION
[0034] In order to make the person in the art better understand the utility model scheme, below will combine the drawings in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the scope of the utility model protection.
[0035] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will be understood that, when a term is used in this specification and / or claims - such as "horizontal" or "vertical" or the like - that there are a number of possible orientations to the same with respect to the relative manner of the illustration of the figures and the relative manner of designation of terms. It will be further understood that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification and / or claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0036] Unless otherwise defined, 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "and / or", "comprises" and / or "comprising" when used in this specification and / or claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0037] It is to be understood that the terms "first", "second", and the like, used in the description and / or claims herein, are used to differentiate between similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of such terms as "first" and "second" are not intended to limit the scope of the application to only two such objects, but rather to simply denote a first and a second of a possible plurality of such objects. It is further understood that the use of the terms "first" and "second" are interchangeable, and that the description and / or claims herein are meant to encompass the use of such terms in any order. Furthermore, the terms "comprise", "comprising", "include", "including" and the like, when used in the present specification and / or claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0038] Embodiment one
[0039] The existing design mainly relies on increasing the number and strength of protective baffles, or enhancing the strength of mechanical connection to cope with the discharge impact force, but such methods have problems of cost increase, maintenance difficulty and low reliability, especially in high-power flexible HVDC transmission systems, the concentrated release of short-circuit current will produce huge destructive force, causing damage to the power module, further threatening the overall stability of the converter valve system. The embodiment provides a blast-proof structure of a flexible HVDC converter valve power module, including the following contents:
[0040] Firstly, parallel copper bars are designed for the loop copper bars to share the current flowing through the loop copper bars, and the energy released by the capacitor short-circuit discharge is introduced into different paths to reduce the concentration of local current and electric power, thereby reducing the impact on a single component. The electric power is controlled within the stress range that the copper bar can withstand, so that the original power loop can be preserved to the greatest extent without being damaged;
[0041] Secondly, the parallel copper bars are reasonably arranged to connect the water-cooled radiators around the IGBT press-pack, and the pulling force of the water-cooled radiators caused by the electric power of the current flowing through the copper bars is relatively balanced, so that the deformation and displacement of the water-cooled radiators caused by the stress can be reduced.
[0042] Finally, a small amount of insulation protection plate is combined to prevent the power device shell from being broken and splashing, and to guide the airflow generated during explosion. Thus, the explosion-proof effect is achieved systematically.
[0043] Referring to Figure 1 , the core component of the power module of the converter valve is an IGBT press-pack, an explosion-proof structure of a power module of a flexible direct current converter valve includes an IGBT press-pack structural member 11, a direct current side composite busbar 12, an alternating current output side copper bar and an insulation plate, the IGBT press-pack structural member 11 is installed outside the IGBT press-pack, the direct current side composite busbar 12 is installed on a first side surface of the IGBT press-pack, the alternating current output side copper bar is installed on a second side surface and a third side surface of the IGBT press-pack, and the insulation plate is installed on a fourth side surface of the IGBT press-pack; the IGBT press-pack includes power devices and water-cooled radiators, the power devices and the water-cooled radiators are alternately placed, the power devices include IGBTs and diodes, the water-cooled radiators are connected with a pipeline 15, and the pipeline 15 is installed on the second side surface and the fourth side surface of the IGBT press-pack; the water-cooled radiators include a first water-cooled radiator 1, a second water-cooled radiator 2, a third water-cooled radiator 3, a fourth water-cooled radiator 4, a fifth water-cooled radiator 5, a sixth water-cooled radiator 6, a seventh water-cooled radiator 7, an eighth water-cooled radiator 8, a ninth water-cooled radiator 9 and a tenth water-cooled radiator 10 arranged in sequence; the alternating current output side copper bar includes a first alternating current output side AC1 copper bar and a second alternating current output side AC2 copper bar, the first water-cooled radiator 1, the third water-cooled radiator 3 and the fifth water-cooled radiator 5 are connected with the first alternating current output side AC1 copper bar, the sixth water-cooled radiator 6, the eighth water-cooled radiator 8 and the tenth water-cooled radiator 10 are connected with the second alternating current output side AC2 copper bar; the second water-cooled radiator 2 and the ninth water-cooled radiator 9 are connected with a positive electrode of the direct current side composite busbar 12, and the fourth water-cooled radiator 4 and the seventh water-cooled radiator 7 are connected with a negative electrode of the direct current side composite busbar 12.
[0044] As Figure 3 , Figure 4As shown in FIG. 1, the copper bars of the first alternating current output side AC1 include a first copper bar 1301, a second copper bar 1302, and a third copper bar 1303. The first water-cooled heat sink 1, the third water-cooled heat sink 3, and the fifth water-cooled heat sink 5 are connected to the first copper bar 1301, the second copper bar 1302, and the third copper bar 1303. The first copper bar 1301 and the second copper bar 1302 are installed on the third side of the IGBT press-pack. The first copper bar 1301 is connected in parallel with the second copper bar 1302 and the third copper bar 1303. The first copper bar 1301 is the AC1 busbar of the conventional scheme. The first copper bar 1301 is connected in parallel with the second copper bar 1302 and the third copper bar 1303. The second copper bar 1302 and the third copper bar 1303 are parallel copper bars designed for the first copper bar 1301. They are used to share the current flowing through the first copper bar 1301, so as to avoid the current flowing through the first copper bar 1301 and the electric force received by the first copper bar 1301 from being too concentrated and damaging the copper bar.
[0045] As shown in FIG. 1, Figure 3 , Figure 4 As shown in FIG. 1, the copper bars of the second alternating current output side AC2 include a fourth copper bar 1401, a fifth copper bar 1402, and a sixth copper bar 1403. The sixth water-cooled heat sink 6, the eighth water-cooled heat sink 8, and the tenth water-cooled heat sink 10 are connected to the fourth copper bar 1401, the fifth copper bar 1402, and the sixth copper bar 1403. The fourth copper bar 1401 and the fifth copper bar 1402 are installed on the third side of the IGBT press-pack. The fourth copper bar 1401 is connected in parallel with the fifth copper bar 1402 and the sixth copper bar 1403. The fourth copper bar 1401 is the AC2 busbar of the conventional scheme. The fifth copper bar 1402 and the sixth copper bar 1403 are parallel copper bars designed for the fourth copper bar 1401. They are used to share the current flowing through the fourth copper bar 1401, so as to avoid the current flowing through the fourth copper bar 1401 and the electric force received by the fourth copper bar 1401 from being too concentrated and damaging the copper bar. The third copper bar 1303 and the sixth copper bar 1403 are installed on the second side of the IGBT press-pack structure, and are used for shunt protection pipeline 15.
[0046] As shown in FIG. 1, Figure 2 , Figure 3 , and Figure 5 As shown in FIG. 1, the DC side composite busbar 12 includes a positive busbar 1201 and a negative busbar 1202. The positive busbar 1201 and the negative busbar 1202 are installed on the first side of the IGBT press-pack. The second water-cooled heat sink 2 and the ninth water-cooled heat sink 9 are connected to the positive busbar 1201. The fourth water-cooled heat sink 4 and the seventh water-cooled heat sink 7 are connected to the negative busbar 1202. The fourth side of the IGBT press-pack is provided with a negative copper bar 16. The fourth water-cooled heat sink 4 and the seventh water-cooled heat sink 7 are connected to the negative copper bar 16. The negative busbar 1202 is connected to the negative copper bar 16. The negative copper bar 16 is a parallel copper bar of the DC side negative busbar, and is used to share the current and the electric force.
[0047] As shown in FIG. 1,Figure 6 As shown, the insulation plate includes a first insulation plate 1701, a second insulation plate 1702 and a third insulation plate 1703, the first water-cooled heat sink 1, the second water-cooled heat sink 2 and the third water-cooled heat sink 3 are connected with the first insulation plate 1701, the second insulation plate 1702 is arranged outside the negative copper bar 16, the fourth water-cooled heat sink 4 and the seventh water-cooled heat sink 7 are connected with the second insulation plate 1702, the eighth water-cooled heat sink 8, the ninth water-cooled heat sink 9 and the tenth water-cooled heat sink 10 are connected with the third insulation plate 1703. The three high-strength insulation plates 1701, 1702 and 1703 are installed on the side of the IGBT press string, which plays a role in protecting the pipeline 15, avoiding damage to the pipeline caused by flying objects generated by the damage of the power device shell under extreme working conditions. Figure 4 As shown, the AC1 parallel copper bar 1303 and the AC2 parallel copper bar 1403 are designed to be installed on the other side of the IGBT press string, covering and shielding the entire surface, which can protect the pipeline 15 on the other side of the press string.
[0048] As shown, Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, the AC1 bus copper bar 1301 302 and 1303 connect the 1 water-cooled heat sink, the 3 water-cooled heat sink and the 5 water-cooled heat sink together; the AC2 bus copper bar 1401 402 and 1403 connect the 6 water-cooled heat sink, the 8 water-cooled heat sink and the 10 water-cooled heat sink together; the insulation plate 1701 connects the 1 water-cooled heat sink, the 2 water-cooled heat sink and the 3 water-cooled heat sink together; the insulation plate 1702 and the copper bar 16 connect the 4 water-cooled heat sink and the 7 water-cooled heat sink together; the insulation plate 1703 connects the 8 water-cooled heat sink, the 9 water-cooled heat sink and the 10 water-cooled heat sink together; the DC side composite bus connects the 2 water-cooled heat sink, the 4 water-cooled heat sink, the 7 water-cooled heat sink and the 9 water-cooled heat sink together.
[0049] The IGBT press string structure 11 includes a first structure 1101, a second structure 1102 and a third structure 1103, the IGBT press string structure is installed between the first structure 1101 and the second structure 1102, and the third structure 1103 is installed between the first structure 1101 and the second structure 1102. The connection combination of multiple copper bars, insulation plates and water-cooled heat sinks makes the IGBT press string become a whole, greatly improves the overall stability of the IGBT press string, and the stability of the structure of the whole IGBT press string is high, which can improve the ability of the water-cooled heat sink to resist displacement and deformation.
[0050] Copper busbars, insulating plates, and composite busbars are installed on the four sides of the IGBT string structure, connecting the IGBT strings into a stable whole. Combined with the fixing of the IGBT pressing structure component 11, this significantly improves the explosion-proof capability of the IGBT pressing structure. The copper busbars, composite busbars, and insulating plates mentioned above are installed around the IGBT string. When the module capacitor short-circuits and discharges, the electrodynamic force generated by the current flowing through the copper busbars balances the pulling force on the water-cooled radiator, reducing the deformation and displacement of the radiator and improving the module's explosion-proof performance.
[0051] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.
[0052] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.
Claims
1. An explosion-proof structure of a flexible HVDC valve power module, characterized by, The application relates to an IGBT press string structure (11), a DC side composite busbar (12), an AC output side copper bar and an insulating plate, the IGBT press string structure (11) is installed outside an IGBT press string, the DC side composite busbar (12) is installed on a first side of the IGBT press string, the AC output side copper bar is installed on a second side and a third side of the IGBT press string, and the insulating plate is installed on a fourth side of the IGBT press string; the IGBT press string comprises power devices and water-cooled radiators, the power devices and the water-cooled radiators are alternately arranged, the power devices comprise IGBTs and diodes, the water-cooled radiators are connected with pipelines (15), and the pipelines (15) are installed on the second side and the fourth side of the IGBT press string; the water-cooled radiators comprise a first water-cooled radiator (1), a second water-cooled radiator (2), a third water-cooled radiator (3), a fourth water-cooled radiator (4), a fifth water-cooled radiator (5), a sixth water-cooled radiator (6), a seventh water-cooled radiator (7), an eighth water-cooled radiator (8), a ninth water-cooled radiator (9) and a tenth water-cooled radiator (10) arranged in sequence; the AC output side copper bar comprises a first AC1 copper bar and a second AC2 copper bar, the first water-cooled radiator (1), the third water-cooled radiator (3) and the fifth water-cooled radiator (5) are connected with the first AC1 copper bar, the sixth water-cooled radiator (6), the eighth water-cooled radiator (8) and the tenth water-cooled radiator (10) are connected with the second AC2 copper bar, the second water-cooled radiator (2) and the ninth water-cooled radiator (9) are connected with a positive electrode of the DC side composite busbar (12), and the fourth water-cooled radiator (4) and the seventh water-cooled radiator (7) are connected with a negative electrode of the DC side composite busbar (12).
2. The explosion-proof structure of a LCC power module according to claim 1, characterized in that, The first AC1 copper bar comprises a first copper bar (1301), a second copper bar (1302) and a third copper bar (1303), and the first water-cooled radiator (1), the third water-cooled radiator (3) and the fifth water-cooled radiator (5) are simultaneously connected with the first copper bar (1301), the second copper bar (1302) and the third copper bar (1303).
3. The explosion-proof structure of a LCC power module according to claim 2, characterized in that, The first copper bar (1301) and the second copper bar (1302) are installed on the third side of the IGBT press string, and the first copper bar (1301) is connected with the second copper bar (1302) and the third copper bar (1303) in parallel.
4. The explosion-proof structure of a LCC power module according to claim 3, characterized in that, The second AC2 copper bar comprises a fourth copper bar (1401), a fifth copper bar (1402) and a sixth copper bar (1403), and the sixth water-cooled radiator (6), the eighth water-cooled radiator (8) and the tenth water-cooled radiator (10) are simultaneously connected with the fourth copper bar (1401), the fifth copper bar (1402) and the sixth copper bar (1403).
5. The explosion-proof structure of a LCC power module according to claim 4, characterized in that, The fourth copper bar (1401) and the fifth copper bar (1402) are installed on the third side of the IGBT press string, and the fourth copper bar (1401) is connected with the fifth copper bar (1402) and the sixth copper bar (1403) in parallel.
6. The explosion-proof structure of a LCC power module according to claim 5, characterized in that, The third copper bar (1303) and the sixth copper bar (1403) are installed on the second side of the IGBT press string and are used for shunting and protecting the pipelines (15).
7. The explosion-proof structure of a LCC power module according to claim 1, characterized in that, The direct current side composite busbar (12) comprises a positive busbar (1201) and a negative busbar (1202), the positive busbar (1201) and the negative busbar (1202) are installed on the first side of the IGBT press string, the second water-cooled radiator (2) and the ninth water-cooled radiator (9) are connected with the positive busbar (1201), and the fourth water-cooled radiator (4) and the seventh water-cooled radiator (7) are connected with the negative busbar (1202).
8. The explosion-proof structure of a LCC power module according to claim 7, characterized in that, The fourth side of the IGBT press string is provided with a negative copper busbar (16), the fourth water-cooled radiator (4) and the seventh water-cooled radiator (7) are connected with the negative copper busbar (16), and the negative busbar (1202) is connected with the negative copper busbar (16).
9. The explosion-proof structure of a LCC power module according to claim 8, characterized in that, The insulation plate comprises a first insulation plate (1701), a second insulation plate (1702) and a third insulation plate (1703), the first water-cooled radiator (1), the second water-cooled radiator (2) and the third water-cooled radiator (3) are connected with the first insulation plate (1701), the second insulation plate (1702) is arranged outside the negative copper busbar (16), the fourth water-cooled radiator (4) and the seventh water-cooled radiator (7) are connected with the second insulation plate (1702), and the eighth water-cooled radiator (8), the ninth water-cooled radiator (9) and the tenth water-cooled radiator (10) are connected with the third insulation plate (1703).
10. The explosion-proof structure of a LCC power module according to claim 1, characterized in that, The IGBT press string structure member (11) comprises a first structure member (1101), a second structure member (1102) and a third structure member (1103), the IGBT press string structure is installed between the first structure member (1101) and the second structure member (1102), and the third structure member (1103) is installed between the first structure member (1101) and the second structure member (1102).