WO2016188504A1 - 一种换流阀 - Google Patents

一种换流阀 Download PDF

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Publication number
WO2016188504A1
WO2016188504A1 PCT/CN2016/089948 CN2016089948W WO2016188504A1 WO 2016188504 A1 WO2016188504 A1 WO 2016188504A1 CN 2016089948 W CN2016089948 W CN 2016089948W WO 2016188504 A1 WO2016188504 A1 WO 2016188504A1
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WO
WIPO (PCT)
Prior art keywords
valve
layer
converter
layers
modules
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Application number
PCT/CN2016/089948
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English (en)
French (fr)
Inventor
张翔
刘磊
方太勋
陈赤汉
李钊
李海英
丁峰峰
Original Assignee
南京南瑞继保电气有限公司
南京南瑞继保工程技术有限公司
常州博瑞电力自动化设备有限公司
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Priority claimed from CN201510284795.8A external-priority patent/CN104901515A/zh
Priority claimed from CN201510283868.1A external-priority patent/CN104901559B/zh
Application filed by 南京南瑞继保电气有限公司, 南京南瑞继保工程技术有限公司, 常州博瑞电力自动化设备有限公司 filed Critical 南京南瑞继保电气有限公司
Priority to RU2017139943A priority Critical patent/RU2668555C1/ru
Priority to AU2016268437A priority patent/AU2016268437B2/en
Priority to US15/573,837 priority patent/US10122292B2/en
Publication of WO2016188504A1 publication Critical patent/WO2016188504A1/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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/07—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00
    • H01L25/072—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/10—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers
    • H01L25/11—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00
    • H01L25/115—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
    • 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
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters
    • H05K7/14339—Housings specially adapted for power drive units or power converters specially adapted for high voltage operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/10—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers
    • H01L25/11—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00
    • H01L25/117—Stacked arrangements of devices

Definitions

  • the present invention relates to the field of power electronics and power system technologies, and in particular, to a converter valve.
  • the converter valve is a key component of HVDC transmission. It has a large physical size. It must withstand several hundred kV at both ends during operation and is in the process of frequent turn-on and turn-off.
  • the voltage resistance of a single commercial power electronic device is currently up to 8.5kV. Therefore, it is necessary to connect several tens or even hundreds of devices in series.
  • the valve tower generally adopts a structure in which a plurality of valve layers are sequentially stacked from top to bottom, and thyristors are evenly distributed on the respective valve layers.
  • One valve layer of the converter valve usually has two valve modules. At present, the two valve modules are connected in a split layer structure and a flat layer structure.
  • 16 reinforced epoxy rods are needed to build a cage frame in space, and then the components are fixed in different positions of the cage frame in turn, the structure is very complicated, the installation and maintenance is cumbersome, and this The cage frame has poor seismic resistance; when the flat structure is arranged, the suspension insulator is used between the upper and lower layers, and the connection between the two components in one valve layer is not used.
  • the converter valve is actually two independent. The converter valve is complicated to install. When an external force such as an earthquake occurs, the displacement between the layers of the valve layer is large. Therefore, the distance between the two valve modules of the valve layer may vary greatly, and the integrity of the converter valve is not strong.
  • the number of components in the valve block of the converter valve is large, and it is necessary to consider the convenience of later operation and maintenance and maintenance during the design process.
  • there are two main ways to overhaul the valve tower of the converter valve One is to operate directly on the lift truck, and there is no maintenance platform inside the valve tower. This method can only repair the peripheral equipment of the valve tower. In the case of failure, it is difficult to maintain; another way is to set up an inspection platform inside the valve tower.
  • the inspection platform In order to meet the insulation requirements, the inspection platform must be wide enough, which inevitably increases the floor space of the valve tower, and the inspection platform is parallel to the valve layer, which is difficult for the maintenance personnel to overhaul the device;
  • each valve layer is also composed of two half-layer valves, but the two half-layer valves are disposed on the same horizontal plane, and the service platform is disposed in the middle of the vertical direction of the two half-layer valves.
  • the inspection platform of this structure has a small width and meets the insulation requirements, but it is only convenient to repair one of the two half-layer valves, and it is not convenient to repair another half-layer valve.
  • an embodiment of the present invention provides a converter valve.
  • the present invention provides a converter valve comprising: a top shield cover, a bottom shield cover, at least two valve layers disposed on top of each other, and an inspection platform, the top shield cover being disposed at an upper portion of the uppermost valve layer, the bottom portion
  • the shielding cover is disposed at a lower portion of the lowermost valve layer; each of the valve layers comprises: two valve modules arranged side by side in a horizontal direction, the two valve modules are electrically connected through the busbar, in the mechanical
  • the lower valve layer is suspended and connected to the upper valve layer; the main body of the inspection platform is located between the horizontal planes of the adjacent upper and lower valve layers, or at the level of the bottommost valve layer and the bottom shield between.
  • the two valve modules are fixedly connected by a first fixed connection member and a second fixed connection member
  • the first fixed connection member is composed of an insulating material
  • the second fixed connection member is an insulator or an insulating beam, or Metal beam.
  • first fixed connection member and the second fixed connection member are respectively disposed between the two valve modules and adjacent to two opposite sidewall positions of the converter valve.
  • valve layers are electrically connected through the busbar on the side close to the first fixed connector; the two valve modules in the same valve layer are electrically connected through the busbar on the side close to the second fixed connector; All valve modules in different valve layers in the converter valve are electrically connected in series.
  • the body of the service platform is suspended by an insulating material on the frame of the two half-layer valves of any one of the valve layers.
  • the frame of the half-layer valve is composed of an inner longitudinal beam, an outer longitudinal beam and at least two beams;
  • the inner side member is a frame on a side of the one-half valve adjacent to the other half-layer valve, the outer side member being a frame on one half of the valve away from the other half of the valve, and
  • the inner longitudinal members are parallel in a horizontal direction, and the transverse beams are coupled between the inner longitudinal members and the outer longitudinal members.
  • the body of the service platform is suspended on the inner longitudinal beam of the two half-layer valves.
  • At least two cooling water pipes are disposed between different valve layers.
  • At least two cable slots are disposed between different valve layers.
  • the converter valve provided by the embodiment of the present invention includes: a top shield cover, a bottom shield cover, at least two valve layers disposed on top of each other, and an inspection platform, wherein the top shield cover is disposed on the uppermost valve layer Upper portion, the bottom shield is disposed at a lower portion of the lowermost valve layer; each of the valve layers includes: two valve modules arranged side by side in a horizontal direction, the two valve modules electrically passing through the mother The row connection is mechanically connected by a fixed connection piece, and the lower valve layer is suspended and connected to the upper valve layer; the body of the inspection platform is located between the horizontal planes of two adjacent upper and lower valve layers, or at the lowest valve layer and The bottom shield is located between the horizontal planes.
  • the flexible connection is realized by suspension between different valve layers, and the seismic performance is strong; the two valve modules in the valve layer are fixed as a whole, the insulation distance is not affected by external forces such as earthquakes, and the valve The layer is a whole, and the whole layer is hoisted for easy operation; the maintenance platform is suspended by the insulator on the lower horizontal plane between the two valve modules, and the valve tower is reduced in the case of satisfying the same creepage distance. Dimensions, and the height difference between the service platform and the valve layer facilitates the maintenance personnel to overhaul the equipment on the valve floor.
  • FIG. 1 is a schematic diagram of an overall structure of a converter valve of a converter valve in an application scenario according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of the converter valve after removing the top shield cover in the application scenario according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a single valve layer in a converter valve according to an application scenario of the embodiment of the present invention
  • FIG. 4 is a schematic diagram of connection of two valve modules in the single valve layer in an application scenario according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a valve layer frame and an inspection platform of the converter valve in an application scenario according to an embodiment of the present invention.
  • the converter valve is composed of four valve layers 2 to 5 stacked on top of each other.
  • the top of the four valve layers is provided with a shield cover 1, and the bottom is provided with a shield cover 6, as shown in Fig. 1, the shield cover is improved in a high voltage electric field.
  • the electric field distribution plays a key role.
  • insulators 61, 62, 63, 64, 65, 66, 67, 68, 69, 610, 611, 612 are suspended and connected between the upper and lower valve layers in the converter valve, and the insulator is used. After suspending the valve layer, the entire converter valve forms a flexible system from top to bottom. When a strong external force such as an earthquake is encountered, the valve layer can swing within a certain range without damaging the overall structure, and strong external forces such as earthquakes disappear. The rear converter valve can continue to operate.
  • the single-layer valve layer is arranged in parallel by the two valve modules 11, 12, and the busbars of one side of the two valve modules are arranged.
  • the shorting of 31 forms an electrical connection between the two valve modules and increases the mechanical strength by means of a fixed connection 22, such as an insulator or an insulating beam or a steel beam interconnection; the other side of the two valve modules is isolated to form a U-shaped arrangement,
  • a fixed connection 22 such as an insulator or an insulating beam or a steel beam interconnection
  • the U-shaped opening side requires a certain insulation distance, and in order to occupy the ground as small as possible, the U-shaped opening side is connected by the insulator 21, which satisfies both modules.
  • the need for insulation between the two increases the strength of the structure, allowing two separate valve modules to form a valve layer.
  • an electrical connection is formed between the upper and lower adjacent valve layers by the bus bar 32, and the bus bar 32 is obliquely connected to the upper and lower adjacent valve layers.
  • cooling water pipes 41-44 are used here to adopt an S-shaped arrangement from top to bottom, that is, one end of the S-type Connect the upper valve layer and the other end of the S-type to the lower valve layer.
  • one is an inlet pipe and the other is an outlet pipe.
  • four cooling water pipes are used, two are inlet pipes and the other two are outlet pipes.
  • the cooling water pipes 41, 44 are inlet pipes
  • the cooling water pipes 42, 43 are outlet pipes
  • the cooling water pipes 41, 44 are outlet pipes. Both the inlet and outlet pipes are arranged externally.
  • the electronic components in the valve layer are not sprayed, and on the other hand, the installation and maintenance of the water pipes are facilitated.
  • At least two cable slots are arranged between the upper and lower valve layers of the converter valve.
  • four fiber optic cable slots 71-74 are taken as an example to provide a triggering and monitoring path for the semiconductor device in the converter valve.
  • the other side of the valve layer opposite to the U-shaped opening side is connected by the bus bar 31, and a fixed connecting member 22 is provided, and the fixing connecting member 22 may be an insulator or a steel beam or the like.
  • the valve layer will become a whole, which is convenient for lifting the whole layer during installation.
  • the frame of each valve module is composed of an inner side member 91, an outer side member 92, and a plurality of (two shown in FIG. 5) cross members 93.
  • a plurality of mounting holes are evenly disposed on the inner side member 91 of each half-layer valve, each mounting hole is connected to an insulator, and the other end of the insulator is connected to the body 51 of the inspection platform, and the body 51 of the inspection platform is suspended by a plurality of insulators.
  • the insulator Hanged on the inner side member 91 of the two half-layer valves, the insulator is usually an insulator with an shed.
  • valve layers are connected by suspension to realize flexible connection, and the seismic performance is strong; the two valve modules in the valve layer are fixed as a whole, and the insulation distance is not affected by earthquakes, etc.
  • the external force influences, and the valve layer is a whole, and the whole layer is hoisted for easy operation during installation; the inspection platform is suspended by the insulator on the lower horizontal plane between the two valve modules, and is reduced in the case of satisfying the same creepage distance.
  • the size of the valve tower and the height difference between the service platform and the valve layer facilitate the operation and maintenance personnel to inspect the equipment on the valve layer.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Rectifiers (AREA)

Abstract

一种换流阀，包括：顶部屏蔽罩（1）、底部屏蔽罩（6）、上下层叠设置的至少两个阀层（2，3，4，5）和检修平台，所述顶部屏蔽罩（1）设置于最上层阀层（2）的上部，所述底部屏蔽罩（6）设置于最下层阀层（5）的下部；每个所述阀层（2，3，4，5）均包括：两个在水平方向上并排设置的阀模块（11，12），所述两个阀模块（11，12）之间在电气上通过母排（31）连接，在机械上通过固定连接件（21，22）连接，下层阀层悬吊连接在上层阀层上；所述检修平台的本体（51）位于相邻两个上下阀层（2，3，4，5）所在水平面之间，或位于最底层阀层（5）与底屏蔽罩（6）所在水平面之间。

Description

一种换流阀 技术领域
本发明涉及电力电子与电力系统技术领域，尤其涉及一种换流阀。
背景技术
换流阀是高压直流输电的关键部件，物理尺寸较为庞大，运行时其两端需承受几百kV电压，且处于频繁开通和关断过程中；单个商用电力电子器件耐压目前最高达到8.5kV，因此需要几十甚至近百级器件串联，阀塔通常采用由上至下依次层叠的多个阀层、晶闸管均匀分布于各阀层的结构。
换流阀的一个阀层通常有两个阀模块构成，目前两个阀模块连接方式有错层结构和平层结构。采用错层结构布置时需要采用16根增强型环氧树脂棒在空间中搭建一个笼型框架，而后依次将各个组件固定在这个笼型框架的不同位置，结构非常复杂，安装检修繁琐，而且这个笼型框架抗震性较差；采用平层结构布置时上下层间采用悬吊绝缘子，一个阀层内的两个组件之间没有采用连接措施，换流阀换流阀事实上为两个独立的换流阀，安装复杂，同时发生地震等外力时，阀层层间位移较大，因此阀层两个阀模块之间距离可能发生较大变化，换流阀的整体性不强。
此外，换流阀阀塔内元器件数量多，在设计过程中需要考虑后期运行维护、检修的便利性。目前换流阀阀塔的检修主要有两种方式，一种是直接在升降车上进行操作、阀塔内部无检修平台，这种方式只能对阀塔外围设备进行检修，若阀塔内部器件发生故障则很难进行维护；另一种方式是在阀塔内部设置检修平台，检修平台与阀层之间的结构主要有两种形式：第一种结构为每个阀层由两个在水平方向上并排布置的半层阀组成，两个半层阀之间固定连接在一起，半层阀之间设置检修平台，检修平台与阀层位于同一水平面，由于检修平台与 两个半层阀之间都直接连接，为满足绝缘要求，检修平台必须足够宽，必然增加了阀塔的占地面积，且检修平台与阀层平行，不便于运维人员对器件的检修；另一种结构中每个阀层也由两个半层阀构成，但两个半层阀间错层设置、不在同一个水平面上，检修平台设置在两个半层阀垂直方向的中间位置，此种结构的检修平台宽度较小且满足绝缘要求，但只能方便检修两个半层阀的其中一个，不便于检修另外一个半层阀。
发明内容
为解决现有存在的技术问题，本发明实施例提供一种换流阀。
本发明提供了一种换流阀，包括：顶部屏蔽罩、底部屏蔽罩、上下层叠设置的至少两个阀层和检修平台，所述顶部屏蔽罩设置于最上层阀层的上部，所述底部屏蔽罩设置于最下层阀层的下部；每个所述阀层均包括：两个在水平方向上并排设置的阀模块，所述两个阀模块之间在电气上通过母排连接，在机械上通过固定连接件连接，下层阀层悬吊连接在上层阀层上；所述检修平台的本体位于相邻两个上下阀层所在水平面之间，或位于最底层阀层与底屏蔽罩所在水平面之间。
其中，所述两个阀模块通过第一固定连接件和第二固定连接件固定连接，所述第一固定连接件由绝缘材料组成，所述第二固定连接件为绝缘子、或绝缘梁、或金属梁。
其中，所述第一固定连接件和第二固定连接件分别设置于两个阀模块之间、且靠近换流阀两个相对的侧壁位置。
其中，不同阀层在靠近所述第一固定连接件一侧通过母排电气连接；同一阀层内的两个阀模块之间在靠近所述第二固定连接件一侧通过母排电气连接；换流阀中不同阀层内的所有阀模块之间为电气串联。
其中，所述检修平台的本体通过绝缘材料悬吊在所述任意一个阀层的两个半层阀的框架上。
其中，所述半层阀的框架由内侧纵梁、外侧纵梁以及至少两个横梁组成； 所述内侧纵梁为一个半层阀上与另一个半层阀相邻一侧的框架，所述外侧纵梁为一个半层阀上远离另一个半层阀一侧的框架、且与所述内侧纵梁在水平方向上平行，所述横梁连接在所述内侧纵梁和外侧纵梁之间。
其中，所述检修平台的本体悬吊在所述两个半层阀的内侧纵梁上。
其中，不同所述阀层之间设置有至少两根冷却水管。
其中，不同所述阀层之间设置有至少两根光缆槽。
本发明实施例提供的换流阀，所述换流阀包括：顶部屏蔽罩、底部屏蔽罩、上下层叠设置的至少两个阀层和检修平台，所述顶部屏蔽罩设置于最上层阀层的上部，所述底部屏蔽罩设置于最下层阀层的下部；每个所述阀层均包括：两个在水平方向上并排设置的阀模块，所述两个阀模块之间在电气上通过母排连接，在机械上通过固定连接件连接，下层阀层悬吊连接在上层阀层上；所述检修平台的本体位于相邻两个上下阀层所在水平面之间，或位于最底层阀层与底屏蔽罩所在水平面之间。本发明实施例所述换流阀中不同阀层之间通过悬吊实现柔性连接，抗震性能强；阀层中两个阀模块固定为一整体，绝缘距离不会受地震等外力影响，而且阀层为一个整体，安装时采用整层吊装，便于操作；另外检修平台通过绝缘子悬吊在两个阀模块之间的下方水平面上，在满足同等爬电距离的情况下，减小了阀塔的尺寸，并且检修平台与阀层之间的高度差方便了运维人员检修阀层上的设备。
附图说明
在附图(其不一定是按比例绘制的)中，相似的附图标记可在不同的视图中描述相似的部件。具有不同字母后缀的相似附图标记可表示相似部件的不同示例。附图以示例而非限制的方式大体示出了本文中所讨论的各个实施例。
图1为本发明实施例应用场景中所述换流阀换流阀的整体结构示意图；
图2为本发明实施例应用场景中所述换流阀去除顶部屏蔽罩后的结构示意图；
图3为本发明实施例应用场景所述换流阀中单个阀层的结构示意图；
图4为本发明实施例应用场景中所述单个阀层中两个阀模块连接示意图；
图5为本发明实施例应用场景中所述换流阀阀层框架及检修平台的结构示意图。
具体实施方式
下面结合附图及具体实施例对本发明作进一步详细说明。
本应用场景中换流阀由上下层叠的四个阀层2～5组成，四个阀层的顶部设置屏蔽罩1、底部设置屏蔽罩6，如图1所示，屏蔽罩在高压电场中改善电场分布起到关键作用。
如图3所示，换流阀中上下阀层之间采用十二只绝缘子61、62、63、64、65、66、67、68、69、610、611、612进行悬吊连接，采用绝缘子悬吊阀层后，整个换流阀自上而下构成一个柔性系统，当遇到地震等强的外力作用时，阀层可以在一定范围内摆动而不至于损坏整体结构，地震等强外力消失后换流阀可继续运行。
如图3和图4所示，为了使换流阀中所有阀模块在电气上形成串联关系，单层阀层由两个阀模块11、12并行布置，两个阀模块的一侧用母排31短接形成两个阀模块之间的电气连接，并用固定连接件22，如：绝缘子或绝缘梁或钢梁互连增加机械强度；两个阀模块的另一侧隔离，形成U型排列，换流阀工作时，阀模块上承受很高电压，因此U型开口侧需要一定的绝缘距离，而为了换流阀占地尽量小，U型开口侧采用绝缘子21连接，既满足两个模块之间的绝缘需要，又在结构上增加了强度，使两个独立的阀模块共同构成一个阀层。如图2和图3所示，上下相邻阀层之间采用母排32形成电气连接，所述母排32斜拉连接上下相邻阀层。
如图2和图3所示，所述换流阀上下阀层之间布置至少两根冷却水管，这里采用四根冷却水管41～44自上而下采用S型布置，即：S型的一端接上层阀层，S型的另一端接下层阀层。通常设置两根冷却水管时一根为进水管、另一根为出水管，采用四根冷却水管时两根为进水管、另外两根为出水管。在图2、 图3中，若冷却水管41、44为进水管、则冷却水管42、43为出水管，反之若冷却水管42、43为进水管、则冷却水管41、44为出水管。进出水管均靠外设置，一方面当发生漏水事故时不会喷淋阀层内的电子元件，另一方面便于水管的安装检修。
如图3所示，换流阀上下阀层之间布置至少两根光缆槽，这里以采用四根光缆槽71～74为例，为换流阀中半导体器件提供触发与监视途径。
如图3和图4所示，阀层中与U型开口侧相对的另外一侧采用母排31连接，并且设置固定连接件22，固定连接件22可以采用绝缘子或者钢梁等。如此阀层将成为一个整体，便于安装时整层吊装。
如图5所示，每个阀模块的框架由内侧纵梁91、外侧纵梁92及多个(图5中显示两个)横梁93构成。在每个半层阀的内侧纵梁91上均匀设置有多个安装孔，每个安装孔连接一个绝缘体，绝缘体的另一端连接检修平台的本体51，经多个绝缘体将检修平台的本体51悬吊于两个半层阀的内侧纵梁91上，绝缘体通常为带伞裙的绝缘子。
综上所述，本发明实施例所述换流阀中不同阀层之间通过悬吊实现柔性连接，抗震性能强；阀层中两个阀模块固定为一整体，绝缘距离不会受地震等外力影响，而且阀层为一个整体，安装时采用整层吊装，便于操作；检修平台通过绝缘子悬吊在两个阀模块之间的下方水平面上，在满足同等爬电距离的情况下，减小了阀塔的尺寸，并且检修平台与阀层之间的高度差方便了运维人员检修阀层上的设备。
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，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内。

Claims (9)

  1. 一种换流阀，包括：顶部屏蔽罩、底部屏蔽罩、上下层叠设置的至少两个阀层以及检修平台，其特征在于，所述顶部屏蔽罩设置于最上层阀层的上部，所述底部屏蔽罩设置于最下层阀层的下部；每个所述阀层均包括：两个在水平方向上并排设置的阀模块，所述两个阀模块之间在电气上通过母排连接，在机械上通过固定连接件连接，下层阀层悬吊连接在上层阀层上；所述检修平台的本体位于相邻两个上下阀层所在水平面之间，或位于最底层阀层与底屏蔽罩所在水平面之间。
  2. 根据权利要求1所述的换流阀，其特征在于，所述两个阀模块通过第一固定连接件和第二固定连接件固定连接，所述第一固定连接件由绝缘材料组成，所述第二固定连接件为绝缘子、或绝缘梁、或金属梁。
  3. 根据权利要求2所述的换流阀，其特征在于，所述第一固定连接件和第二固定连接件分别设置于两个阀模块之间、且靠近换流阀两个相对的侧壁位置。
  4. 根据权利要求1～3所述的换流阀，其特征在于，不同阀层在靠近所述第一固定连接件一侧通过母排电气连接；同一阀层内的两个阀模块之间在靠近所述第二固定连接件一侧通过母排电气连接；换流阀中不同阀层内的所有阀模块之间为电气串联。
  5. 根据权利要求1所述的换流阀，其特征在于，所述检修平台的本体通过绝缘材料悬吊在所述任意一个阀层的两个半层阀的框架上。
  6. 根据权利要求1和5所述的一种换流阀，其特征在于，所述半层阀的框架由内侧纵梁、外侧纵梁以及至少两个横梁组成；所述内侧纵梁为一个半层阀上与另一个半层阀相邻一侧的框架，所述外侧纵梁为一个半层阀上远离另一个半层阀一侧的框架、且与所述内侧纵梁在水平方向上平行，所述横梁连接在所述内侧纵梁和外侧纵梁之间。
  7. 根据权利要求1和6所述的一种换流阀，其特征在于，所述检修平台的本体悬吊在所述两个半层阀的内侧纵梁上。
  8. 根据权利要求1所述的换流阀，其特征在于，不同所述阀层之间设置有至少两根冷却水管。
  9. 根据权利要求1所述的换流阀，其特征在于，不同所述阀层之间设置有至少两根光缆槽。
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