WO2017016437A1 - 柔性直流输电用绝缘栅双极型晶体管模块单元 - Google Patents

柔性直流输电用绝缘栅双极型晶体管模块单元 Download PDF

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WO2017016437A1
WO2017016437A1 PCT/CN2016/090911 CN2016090911W WO2017016437A1 WO 2017016437 A1 WO2017016437 A1 WO 2017016437A1 CN 2016090911 W CN2016090911 W CN 2016090911W WO 2017016437 A1 WO2017016437 A1 WO 2017016437A1
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sub
module
end plates
right direction
mounting end
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PCT/CN2016/090911
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English (en)
French (fr)
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吴红艳
李华君
张承
杜玉格
谢云龙
任成才
吴伟伟
程君凤
Original Assignee
许继电气股份有限公司
国家电网公司
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Publication of WO2017016437A1 publication Critical patent/WO2017016437A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

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  • the invention relates to an insulated-gate-bipolar transistor (IGBT) module unit for flexible direct current transmission.
  • IGBT insulated-gate-bipolar transistor
  • Flexible DC transmission technology is a new type of DC transmission technology based on voltage source converter, turn-off device and pulse width modulation technology. Compared with the traditional thyristor-based current source DC transmission technology, the flexible DC transmission technology uses a fully controlled power electronic device such as IGBT.
  • the system has fast response speed, good controllability, flexible operation mode, and can reduce system short circuit capacity. To improve the quality of power. It has obvious advantages in the connection of renewable energy, grid-connected power generation, island power supply, and urban power grid.
  • the existing domestic and foreign flexible DC transmission converter valve sub-modules mostly adopt single-module independent plug-in structure, and IGBT mostly selects traditional IGBT.
  • a parallel sub-module for flexible direct current transmission is disclosed in the Chinese invention patent application with the publication number CN1013354232A.
  • the parallel sub-module of the sub-module includes a capacitor, two IGBT power units and two main busbars.
  • Each IGBT power unit comprises a heat sink, two or more IGBT sub-modules connected in parallel and a control loop thereof, and each power unit further comprises a composite busbar, and the capacitor is connected to the corresponding IGBT power unit through the upper capacitor end of the composite busbar.
  • the two main busbars are respectively connected to the corresponding IGBT power unit through the outlet ends provided on the two composite busbars, and a thyristor is electrically connected between the two main busbars.
  • the parallel sub-module When the parallel sub-module is used, the single module is fixed and fixed on the mounting base as a single unit. Each single module needs to be fixed by crimping and fixing structure, the number of sub-modules is large, and the installation structure is complicated.
  • the embodiment of the invention provides an IGBT module unit for flexible direct current transmission, which solves the technical problem that the single module plug-in installation structure existing in the prior art is complicated.
  • an IGBT module unit for flexible direct current transmission comprising a mounting frame, a sub-module crimping unit is fixed at the front part of the mounting frame, and the sub-module crimping unit is
  • the utility model comprises an intermediate frame extending in the left-right direction and two mounting end plates fixed on the left and right ends of the intermediate frame, the two mounting end plates are fixed on the mounting frame, and the intermediate frame is mounted with at least two sub-modules arranged in sequence in the left-right direction and Insulating block between modules, two mounting end plates are provided with two clamping devices for cooperatively locating and positioning the sub-module and the inter-module insulating block in the left-right direction, and each sub-module comprises an IGBT and a thyristor respectively.
  • the rear part of the mounting frame is provided with a capacitor electrically connected to each sub-module in one-to-one correspondence.
  • Each of the sub-modules includes two of the IGBTs, three heat sinks, and one of the thyristors, two IGBTs and three heat sinks are arranged at intervals in the left-right direction, and one thyristor is disposed at the rightmost The outside of the side radiator.
  • One of the two clamping devices in the sub-module crimping unit is a disc spring pressing device for applying a force to an external loading mechanism.
  • the intermediate frame includes an insulating tie rod extending in the left-right direction.
  • the two ends of the insulating pull rod are respectively fixedly connected to the two mounting end plates, and the corresponding side faces of the two mounting end plates are respectively provided with a card slot extending in the left-right direction, and the insulating rod
  • the two ends are correspondingly mounted in the card slots of the two mounting end plates, and the pressing plates for press-fixing the insulating rods in the card slots are detachably fixed on the two mounting end plates.
  • the two ends of the insulating pull rod are respectively provided with a ring groove structure, and each of the ring groove structures respectively has a blocking groove wall arranged at intervals in the left and right direction, and the two ring groove structures are correspondingly matched with the card slots on the two mounting end plates, each of which is matched
  • the two-stop groove wall of the ring groove structure is respectively restrained from the left and right sides of the two mounting end plates in the left-right direction.
  • the front portion of the mounting frame is provided with a support extending in the left-right direction above the sub-module
  • the slide rail and the support rail are movably assembled with a loop control box electrically connected to each submodule and each capacitor in one-to-one correspondence.
  • the mounting frame includes two supporting beams arranged in the left-right direction and arranged in parallel in the front-rear direction, and a bridge beam bridging between the two supporting beams in the left-right direction, and the two mounting end plates are respectively mounted on the two supporting beams.
  • the capacitor is correspondingly fixed on the bridge beam.
  • the intermediate frame includes an insulating support strap bridging between the two mounting end plates for supporting the sub-modules.
  • the beneficial effects of the IGBT module unit for flexible direct current transmission provided by the embodiments of the present invention are: in the IGBT module unit for flexible direct current transmission provided by the embodiment of the present invention, the fixing of each submodule in the submodule crimping unit is crimped in series It is mounted on the intermediate frame, and then fixedly mounted on the mounting frame through the two mounting end plates of the intermediate frame, and the two sub-modules are clamped and positioned by the two clamping devices disposed on the two mounting end plates, thereby reducing the installation components and simplifying The submodule is mounted with a crimp structure.
  • two IGBTs and three heat sinks in each sub-module are sequentially spaced apart from each other in the left-right direction, and one thyristor is disposed outside the rightmost heat sink, so that each IGBT is It can realize heat dissipation on both sides, effectively improve the heat dissipation environment, improve the reliability of IGBT and prolong its service life.
  • one of the two clamping devices of the sub-module crimping unit is a disc spring pressing device for applying a force to the external loading mechanism, and the disc spring pressing device can provide the same.
  • the loading force on the other hand, the disc spring pressing device itself is elastic pressing, which can effectively buffer the clamping pressure of each sub-module.
  • the two ends of the insulating rod are correspondingly mounted in the card slots of the two mounting end plates, and are press-fitted and fixed by the pressing plate, thereby reducing the threaded connection structure of the insulating rod and effectively strengthening the connection strength.
  • the assembly circuit control box is moved by supporting the slide rails, and in use, the control rails of the support rail drive circuit can be moved to corresponding positions to correspond to each The submodule and the capacitor are electrically connected one by one.
  • FIG. 1 is a schematic structural view of an IGBT module unit for flexible direct current transmission according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the rear side structure of the IGBT module unit shown in FIG. 1;
  • FIG 3 is a schematic structural view of the mounting frame of Figure 1;
  • Figure 4 is a schematic structural view of the sub-module crimping unit of Figure 1;
  • FIG. 5 is a schematic structural view of the entire frame of the sub-module crimping unit of FIG. 4.
  • FIG. 5 is a schematic structural view of the entire frame of the sub-module crimping unit of FIG. 4.
  • an embodiment of an IGBT module unit for flexible direct current transmission the IGBT module unit in this embodiment includes a mounting frame 1, and a front sub-module crimping unit 4 is fixed at a front portion of the mounting frame 1.
  • a plurality of sub-modules 40 are crimped to the sub-module crimping unit 4, and a capacitor 3 electrically connected to each sub-module in one-to-one correspondence is fixed at a rear portion of the mounting frame 1, and is in the front portion of the mounting frame 1
  • Each of the sub-modules 40 is provided with a supporting slide rail 7 extending in the left-right direction.
  • the support slide rail 7 is movably mounted with a loop control box 2 electrically connected to each sub-module and each capacitor in one-to-one correspondence.
  • the mounting frame 1 includes two support beams 11 which are arranged in the left-right direction, are arranged in parallel in the front-rear direction, and bridge beams 12 which are bridged between the two support beams 11 in the left-right direction, and the sub-modules are crimped.
  • the unit 4 is disposed at the front of the support beam 11, and the capacitor 3 is correspondingly disposed on the bridge beam 12 at the rear of the mounting frame 1.
  • the sub-module crimping unit 4 includes an intermediate frame extending in the left-right direction and two mounting end plates fixed at the left and right ends of the intermediate frame, and the two mounting end plates are left mounting end plates fixed on the mounting frame 1. 41 and a right mounting end plate 42, the intermediate frame is mounted with at least two sub-modules 40 and inter-module insulating blocks 404 arranged in sequence in the left-right direction, and the two mounting end plates are provided for cooperation Two clamping devices for clamping and positioning the sub-module and the inter-module insulating block in the left-right direction, each sub-module comprising two IGBTs 402, three heat sinks 401 and one thyristor 403, two IGBTs and three The heat sinks are arranged at intervals in the left-right direction, and one thyristor is disposed outside the rightmost heat sink.
  • one of the two clamping devices in the sub-module crimping unit is a disc spring pressing device 60 for applying a force to the external loading mechanism, and the other is a rigid pressing device.
  • the rigid pressing device specifically includes a ball head sliding bolt 45 mounted on the left mounting end plate 41 and a top pressing flange 46 driven by the ball head sliding bolt 45, and the pressing flange 46 has a top press fit with the corresponding submodule The top pressure plane.
  • the disc spring pressing device 60 includes an introduction sleeve 48, and a disc spring 49 is set on the introduction sleeve 48, and an end cover 50 driven by the disc spring 49 is attached to the inner end of the introduction sleeve 48 facing each sub-module.
  • the spring 49 applies a clamping force to each sub-module through the end cap 50.
  • the intermediate frame specifically includes an insulating rod 43 extending in the left-right direction.
  • the two ends of the insulating rod 43 are respectively fixedly connected to the two mounting end plates, and are respectively extended on the corresponding sides of the two mounting end plates in the left-right direction.
  • the card slot, the two ends of the insulating rod 43 are correspondingly mounted in the card slots of the two mounting end plates, and are detachably fixed on the two mounting end plates for press-fixing the insulating rod 43 to the card.
  • a ring groove structure is respectively disposed at two ends of the insulating rod 43 , and each ring groove structure has a blocking groove wall spaced apart in the left and right direction, and the two ring groove structure and the card slot corresponding to the two mounting end plates are correspondingly arranged.
  • the two-stop groove wall of each ring groove structure is respectively blocked with the left and right sides of the two mounting end plates in the left-right direction.
  • the intermediate frame in this embodiment further includes an insulating support strip 44 bridged between the two mounting end plates for supporting the sub-modules.
  • the resistors 8 are fixed on both sides of the heat sink on both sides of the sub-module crimping unit, and correspondingly connected to the cooling water channel 5 on the heat sink 401 of the sub-module crimping unit, respectively, and the cooling water is guided through the cooling water channel.
  • the heat sink 401 of each submodule is fixed on both sides of the heat sink on both sides of the sub-module crimping unit, and correspondingly connected to the cooling water channel 5 on the heat sink 401 of the sub-module crimping unit, respectively, and the cooling water is guided through the cooling water channel.
  • the heat sink 401 of each submodule is fixed on both sides of the heat sink on both sides of the sub-module crimping unit, and correspondingly connected to the cooling water channel 5 on the heat sink 401 of the sub-module crimping unit, respectively, and the cooling water is guided through the cooling water channel.
  • the heat sink 401 of each submodule is fixed on both sides of the heat sink on both sides
  • Step 1 Assemble the mounting frame 1.
  • Step 2 assembling the overall frame of the sub-module crimping unit on the operating platform.
  • Step 3 the heat sinks 401 are sequentially mounted to the intermediate frame of the sub-module crimping unit, and the alignment is supported by the insulating support tape 44 at the bottom, and the IGBT 402 and the thyristor 403 are fixedly connected to the heat sink to form the sub-modules 40.
  • the support pin is limited by the bottom of the heat sink, and an inter-module insulation stop is added between each sub-module.
  • step 4 the hydraulic module is applied to the disc spring pressing device to pressurize the sub-module crimping unit, and the lead sleeve is locked by the threaded sleeve.
  • step 5 the sub-module crimping unit is integrally hoisted and installed at the front of the mounting frame.
  • step 6 the capacitor 3 is sequentially hoisted into the rear of the mounting frame and fixed accordingly.
  • step 7 the capacitor and the sub-module crimping unit are electrically connected to the busbar through the busbar 6.
  • step 8 the loop control box 2 is placed above the heat sink by the support rail 7, and the loop control box is fixed above the heat sink, and the cable channel is fixed outside the loop control box through the small stud connection.
  • step 9 the connection of the cooling water path 5 of the sub-module crimping unit is completed.
  • the mounting frame and the intermediate frame are both insulated to ensure electrical insulation of the sub-modules.
  • two sub-modules are provided with two IGBTs, three heat sinks and one thyristor.
  • the number of IGBTs and thyristors may be set according to the actual circuit topology.
  • three sub-modules are disposed in the sub-module crimping unit.
  • two sub-modules or four or more sub-modules may be disposed in the sub-module crimping unit, as long as the series crimping structure is adopted. Yes, this can effectively reduce the number of parts required for module press-fit and simplify the press-fit positioning structure.
  • each sub-module in the sub-module crimping unit is fixedly mounted on the intermediate frame in series and then fixedly mounted on the intermediate frame through the two mounting end plates of the intermediate frame.
  • the two sub-modules are clamped and positioned by the two clamping devices disposed on the two mounting end plates, thereby reducing the installation components and effectively simplifying the sub-module mounting crimping structure.

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  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

柔性直流输电用IGBT模块单元，包括安装框架（1），安装框架（1）的前部固设有子模块压接单元（4），子模块压接单元（4）包括沿左右方向延伸的中间框架和固设在中间框架左右两端的两安装端板（41、42），两安装端板（41、42）固设在安装框架（1）上，中间框架上安装有沿左右方向依次相间布置的至少两个子模块（40）和模块间绝缘挡块（404），两安装端板（41、42）上设有用于配合使用以在左右方向上夹持定位所述子模块（40）和模块间绝缘挡块（404）的两夹持装置，各子模块分别包括IGBT和晶闸管，所述安装框架（1）的后部固设有与各子模块一一对应电气连接的电容（3）。

Description

柔性直流输电用绝缘栅双极型晶体管模块单元 技术领域
本发明涉及一种柔性直流输电用绝缘栅双极型晶体管(IGBT，insulated-gate-bipolar transistor)模块单元。
背景技术
柔性直流输电技术是一种以电压源变流器、可关断器件和脉宽调制技术为基础的新型直流输电技术。与传统基于晶闸管的电流源型直流输电技术相比，柔性直流输电技术采用了全控型的电力电子器件如IGBT，***反应速度快、可控性较好、运行方式灵活，能够减少***短路容量，提高电能质量。在可再生能源并网、分布式发电并网、孤岛供电、城市电网供电等方面具有明显的优势。
现有的国内外的柔性直流输电换流阀子模块多采用单模块独立插装式结构，IGBT多选用传统型的IGBT。如申请公布号为CN1013354232A的中国发明专利申请中就公开了一种用于柔性直流输电的并联子模块，该子模块这种并联子模块包括电容、两个IGBT功率单元和两个主母排，每个IGBT功率单元包括散热器、并联的两个以上的IGBT子模块及其控制回路，每个功率单元还包括复合母排，电容通过复合母排上端电容连接端与对应的IGBT功率单元连接，两个主母排分别通过两复合母排上设有的出线端与对应的IGBT功率单元连接，并且，在两主母排之间导电连接有晶闸管。这种并联子模块在使用时，单模块作为一个单独的整体插装固定在安装基体上，每个单模块都需要采用压接固定结构装夹固定，子模块数量多，安装结构较为复杂。
发明内容
本发明实施例提供一种柔性直流输电用IGBT模块单元，以解决现有技术中存在的单模块插装式安装结构较为复杂的技术问题。
本发明实施例所提供的柔性直流输电用IGBT模块单元的技术方案是：柔性直流输电用IGBT模块单元，包括安装框架，安装框架的前部固设有子模块压接单元，子模块压接单元包括沿左右方向延伸的中间框架和固设在中间框架左右两端的两安装端板，两安装端板固设在安装框架上，中间框架上安装有沿左右方向依次相间布置的至少两个子模块和模块间绝缘挡块，两安装端板上设有用于配合使用以在左右方向上夹持定位所述子模块和模块间绝缘挡块的两夹持装置，各子模块分别包括IGBT和晶闸管，所述安装框架的后部固设有与各子模块一一对应电气连接的电容。
所述的各子模块分别包括2个所述的IGBT、3个散热器和1个所述的晶闸管，2个IGBT和3个散热器沿左右方向依次相互间隔布置，1个晶闸管设置在最右侧散热器的外侧。
所述的子模块压接单元中的两夹持装置中的其中一个为供外界加载机构施加作用力的碟簧顶压装置。
所述的中间框架包括沿左右方向延伸的绝缘拉杆，绝缘拉杆的两端分别与两安装端板固连，在两安装端板的相应侧面上分别设有沿左右方向延伸的卡槽，绝缘拉杆的两端对应卡装在所述两安装端板的卡槽中，在两安装端板上还可拆的固设有用于将绝缘拉杆压装固定在所述卡槽中的压板。
所述的绝缘拉杆的两端分别设有环槽结构，各环槽结构分别具有沿左右方向间隔布置的挡止槽壁，两环槽结构与两安装端板上的卡槽对应卡配，各环槽结构的两挡止槽壁在左右方向上与两安装端板的左右侧面分别挡止限位配合。
所述的安装框架的前部于所述子模块上方设有沿左右方向延伸的支撑 滑轨，支撑滑轨上可移动的装配有与各子模块及各电容一一对应电气连接的回路控制盒。
所述的安装框架包括沿左右方向间隔布置、沿前后方向并行布置的两支撑梁和沿左右方向桥接在两支撑梁之间的桥接梁，所述两安装端板分别对应的安装在两支撑梁上，所述电容对应的固设在所述桥接梁上。
所述的中间框架包括桥接在所述两安装端板之间的用于撑托所述各子模块的绝缘支撑带。
本发明实施例所提供的柔性直流输电用IGBT模块单元的有益效果是：本发明实施例所提供的柔性直流输电用IGBT模块单元中，子模块压接单元中的各子模块串联压接的固定安装在中间框架上，然后通过中间框架的两安装端板固定安装在安装框架上，通过设置在两安装端板上的两夹持装置夹持定位各子模块，减少了安装零部件，有效简化了子模块安装压接结构。
在本发明实施例一实施方式中，各子模块中的2个IGBT和3个散热器沿左右方向依次相互间隔布置，1个晶闸管设置在最右侧散热器的外侧，这样，每个IGBT均可实现两面散热，有效改善散热环境，提高IGBT可靠性，延长其使用寿命。
在本发明实施例一实施方式中，子模块压接单元的两夹持装置中的其中一个为供外界加载机构施加作用力的碟簧顶压装置，通过该碟簧顶压装置一方面可以提供加载作用力，另一方面，碟簧顶压装置本身为弹性顶压，可以有效缓冲平衡各子模块受到的夹持压力。
在本发明实施例一实施方式中，绝缘拉杆的两端对应卡装在两安装端板的卡槽中，并通过压板压装固定，减少了绝缘拉杆的螺纹连接结构，有效加强了连接强度。
在本发明实施例一实施方式中，通过支撑滑轨移动装配回路控制盒，在使用时，可通过支撑滑轨驱动回路控制盒移动至相对应位置以对应与各 子模块及电容一一对应电气连接。
附图说明
图1是本发明所提供的一种实施例的柔性直流输电用IGBT模块单元的结构示意图；
图2是图1所示IGBT模块单元的后侧结构示意图；
图3是图1中安装框架的结构示意图；
图4是图1中子模块压接单元的结构示意图；
图5是图4中子模块压接单元的整体框架的结构示意图。
具体实施方式
如图1至图5所示，一种柔性直流输电用IGBT模块单元的实施例，该实施例中的IGBT模块单元包括安装框架1，安装框架1的前部固设有子模块压接单元4，子模块压接单元4上压接有多个子模块40，在安装框架1的后部固设有与各子模块一一对应电气连接的电容3，且在安装框架1的前部于所述各子模块40上方设有沿左右方向延伸的支撑滑轨7，支撑滑轨7上可移动的装配有与各子模块及各电容一一对应电气连接的回路控制盒2。
如图3所示，安装框架1包括沿左右方向间隔布置、沿前后方向并行布置的两支撑梁11和沿左右方向桥接在两支撑梁11之间的桥接梁12，所述的子模块压接单元4设置在支撑梁11的前部，而电容3则对应设置在位于安装框架1的后部的桥接梁12上。
如图4所示，子模块压接单元4包括左右方向延伸的中间框架和固设在中间框架左右两端的两安装端板，两安装端板为固设在安装框架1上的左安装端板41和右安装端板42，中间框架上安装有沿左右方向依次相间布置的至少两个子模块40和模块间绝缘挡块404，两安装端板上设有用于配合使用 以在左右方向上夹持定位所述子模块和模块间绝缘挡块的两夹持装置，各子模块分别包括2个IGBT402、3个散热器401和1个晶闸管403，2个IGBT和3个散热器沿左右方向依次相互间隔布置，1个晶闸管设置在最右侧散热器的外侧。
本实施例中，子模块压接单元中的两夹持装置中的其中一个为供外界加载机构施加作用力的碟簧顶压装置60、另一个为刚性顶压装置。
刚性顶压装置具体包括安装在左安装端板41上的球头滑动螺栓45和由球头滑动螺栓45驱动的顶压法兰46，顶压法兰46具有用于与相应子模块顶压配合的顶压平面。
而碟簧顶压装置60则包括导入套48，在导入套48上套装有碟簧49，在导入套48的朝向各子模块的内端加装有由碟簧49驱动的端盖50，碟簧49通过所述端盖50向各子模块施加夹持作用力。
如图5所示，中间框架具体包括沿左右方向延伸的绝缘拉杆43，绝缘拉杆43的两端分别与两安装端板固连，在两安装端板的相应侧面上分别设有沿左右方向延伸的卡槽，绝缘拉杆43的两端对应卡装在所述两安装端板的卡槽中，在两安装端板上还可拆的固设有用于将绝缘拉杆43压装固定在所述卡槽中的压板71。具体来说，在绝缘拉杆43的两端分别设有环槽结构，各环槽结构分别具有沿左右方向间隔布置的挡止槽壁，两环槽结构与两安装端板上的卡槽对应卡配，各环槽结构的两挡止槽壁在左右方向上与两安装端板的左右侧面分别挡止限位配合。
本实施例中的中间框架还包括桥接在所述两安装端板之间的用于撑托所述各子模块的绝缘支撑带44。
同时，在子模块压接单元的两侧的散热器两侧固定电阻8，并且，在子模块压接单元的散热器401上分别对应的与冷却水路5对应连通，通过冷却水路将冷却水导向各子模块的散热器401中。
装配时，可安装下下述步骤进行装配；
步骤1，组装安装框架1。
步骤2，在操作平台组装子模块压接单元的整体框架。
步骤3，将散热器401按顺序依次安装到子模块压接单元的中间框架，通过底部的绝缘支撑带44支撑对正，并将IGBT402、晶闸管403与散热器固连以形成各子模块40，通过散热器底部的支撑销钉限位，并在各子模块之间加装模块间绝缘挡块。
步骤4，通过液压工具作用在碟簧顶压装置上以对子模块压接单元进行加压，通过螺纹套锁定导入套。
步骤5，将子模块压接单元整体吊装安装在安装框架前部。
步骤6，将电容3依次吊装入安装框架后部，并相应固定。
步骤7，对电容及子模块压接单元通过母排6进行母排电气连接。
步骤8，通过支撑滑轨7将回路控制盒2划入散热器上方，将回路控制盒固定在散热器上方，通过小螺柱连接将光缆通道固定在回路控制盒外侧。
步骤9，完成子模块压接单元的冷却水路5的连接。
本实施例中，安装框架及中间框架均采用绝缘结构，以保证各子模块的电气绝缘。
本实施例中，各子模块中设置有2个IGBT，3个散热器及1个晶闸管，在其他实施例中，也可以根据实际电路拓扑结构设置IGBT和晶闸管的个数。
本实施例中，子模块压接单元中设置有3个子模块，在其他实施例中，子模块压接单元中也可以设置2个子模块或者4个以上的子模块，只要采用串联压接结构即可，这样就可以有效减少模块压装所需零部件数目，简化压装定位结构。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
采用本发明实施例，在柔性直流输电用IGBT模块单元中，子模块压接单元中的各子模块串联压接的固定安装在中间框架上，然后通过中间框架的两安装端板固定安装在安装框架上，通过设置在两安装端板上的两夹持装置夹持定位各子模块，减少了安装零部件，有效简化了子模块安装压接结构。

Claims (8)

  1. 一种柔性直流输电用绝缘栅双极型晶体管IGBT模块单元，包括安装框架，安装框架的前部固设有子模块压接单元，子模块压接单元包括沿左右方向延伸的中间框架和固设在中间框架左右两端的两安装端板，两安装端板固设在安装框架上，中间框架上安装有沿左右方向依次相间布置的至少两个子模块和模块间绝缘挡块，两安装端板上设有用于配合使用以在左右方向上夹持定位所述子模块和模块间绝缘挡块的两夹持装置，各子模块分别包括IGBT和晶闸管，所述安装框架的后部固设有与各子模块一一对应电气连接的电容。
  2. 根据权利要求1所述的IGBT模块单元，其中，所述的各子模块分别包括2个所述的IGBT、3个散热器和1个所述的晶闸管，2个IGBT和3个散热器沿左右方向依次相互间隔布置，1个晶闸管设置在最右侧散热器的外侧。
  3. 根据权利要求1或2所述的IGBT模块单元，其中，所述的子模块压接单元中的两夹持装置中的其中一个为供外界加载机构施加作用力的碟簧顶压装置。
  4. 根据权利要求1或2所述的IGBT模块单元，其中，所述的中间框架包括沿左右方向延伸的绝缘拉杆，绝缘拉杆的两端分别与两安装端板固连，在两安装端板的相应侧面上分别设有沿左右方向延伸的卡槽，绝缘拉杆的两端对应卡装在所述两安装端板的卡槽中，在两安装端板上还可拆的固设有用于将绝缘拉杆压装固定在所述卡槽中的压板。
  5. 根据权利要求4所述的IGBT模块单元，其中，所述的绝缘拉杆的两端分别设有环槽结构，各环槽结构分别具有沿左右方向间隔布置的挡止槽壁，两环槽结构与两安装端板上的卡槽对应卡配，各环槽结构的两挡止槽壁在左右方向上与两安装端板的左右侧面分别挡止限位配合。
  6. 根据权利要求1或2所述的IGBT模块单元，其中，所述的安装框架的 前部于所述子模块上方设有沿左右方向延伸的支撑滑轨，支撑滑轨上可移动的装配有与各子模块及各电容一一对应电气连接的回路控制盒。
  7. 根据权利要求1或2所述的IGBT模块单元，其中，所述的安装框架包括沿左右方向间隔布置、沿前后方向并行布置的两支撑梁和沿左右方向桥接在两支撑梁之间的桥接梁，所述两安装端板分别对应的安装在两支撑梁上，所述电容对应的固设在所述桥接梁上。
  8. 根据权利要求1或2所述的IGBT模块单元，其中，所述的中间框架包括桥接在所述两安装端板之间的用于撑托所述各子模块的绝缘支撑带。
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