WO2018210352A1 - 一种方形布置的混合型直流断路器阀结构 - Google Patents

一种方形布置的混合型直流断路器阀结构 Download PDF

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Publication number
WO2018210352A1
WO2018210352A1 PCT/CN2018/090747 CN2018090747W WO2018210352A1 WO 2018210352 A1 WO2018210352 A1 WO 2018210352A1 CN 2018090747 W CN2018090747 W CN 2018090747W WO 2018210352 A1 WO2018210352 A1 WO 2018210352A1
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Prior art keywords
valve
square
branch
tower
valve tower
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PCT/CN2018/090747
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English (en)
French (fr)
Inventor
刘彬
文继锋
于海波
杨兵
吕玮
石巍
张伟为
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Publication of WO2018210352A1 publication Critical patent/WO2018210352A1/zh
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for DC systems
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/80Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps

Definitions

  • the invention belongs to a DC circuit breaker, and particularly relates to a square-type hybrid DC circuit breaker valve structure.
  • Hybrid DC circuit breakers have received much attention as one of the many solutions.
  • the working principle of the hybrid circuit breaker generally includes the IGBT valve tower assembly, the fast switching assembly, the on-state branch assembly, and the bulky, especially the fast switching component of the most current transfer key device, so that the valve tower layout is mostly Irregular state, large volume, heavy weight, is not conducive to the maintenance of the access line in the valve hall.
  • CN201610357836.6 discloses a DC circuit breaker valve tower structure, but it does not include a fast mechanical switch component, and only the IGBT valve assembly is described.
  • the valve hall arrangement in engineering applications requires additional consideration of the switch components, the floor of the on-state valve layer, and the support foundation.
  • This case combines the self-developed hybrid DC circuit breaker topology to organically combine the fast mechanical switch, IGBT valve assembly tower and on-state valve layer into relatively independent and interrelated valve towers.
  • the common side design makes the overall circuit breaker have a regular outer
  • the square outer contour has the characteristics of small footprint and light weight.
  • the present invention provides a complete, regular square arrangement of a hybrid circuit breaker valve structure comprising a fast mechanical switch, a series of power device valve stacks, and an energy consuming arrester.
  • the hybrid high-voltage DC circuit breaker valve of the present invention comprises a transfer branch, an on-state branch and an energy-consuming branch, wherein the branches respectively form a square valve tower of a layered series structure, the squares
  • the valve tower constitutes a high voltage DC circuit breaker valve tower having a regular square profile by sharing at least one side length.
  • the sub-units of the modular design of the transfer branch are formed by a series connection in the same layer and a series connection between the layers to form a square valve tower; between the upper and lower sub-units, the same horizontal layer is connected between the respective horizontal layers through the pillars or the suspension insulators.
  • the height of the support frame is the same as that of the energy-consuming branch valve tower and the on-state branch valve tower, and its length is the same as that of the energy-consuming branch valve tower.
  • the lightning arrester subunit composed of the modular structure of the energy dissipation branch is composed of a square valve tower of a parallel superposition structure; between the upper and lower subunits, the same horizontal layer is connected to the respective support frames through the pillars or the suspension insulators; Its height and length are the same as those of the current limiting branch valve tower; its adjacent two layers have the same potential difference as the current limiting valve tower.
  • the transfer branch square valve tower and the energy-consuming branch square valve tower of the energy dissipation branch form a square current-limiting branch valve tower by means of layered parallel connection; the length, height, layer height and layer of the 3-valve tower The number is consistent, and the width of the restrictor valve tower is the sum of the width of the transfer branch square valve tower and the energy consumption branch square valve tower.
  • the on-state branch routing first-layer on-state valve tower layer and the n-layer switch tower parallel thereto form an n+1-layer square valve tower; the first layer and the n-layer have the same length, width, and high size, and the total The height is the same as that of the current limiting branch valve tower of claim 4.
  • the on-state branch valve tower has the same length as the square restrictor valve tower of claim 4, and together constitutes the outer contour of the square valve tower of the high-voltage DC circuit breaker.
  • the high-voltage DC circuit breaker comprises at least two independent high-voltage power supply devices, respectively for supplying a current limiting branch valve tower and an on-state branch valve tower; and the high-voltage power supply device is located in a square tower of the high-voltage DC circuit breaker Within the square projection range of the ground plane.
  • a pressure equalizing ring is arranged on the top of the high voltage DC circuit breaker, and the voltage equalizing ring serves as a current channel between the on-state branch valve tower and the current limiting branch valve tower.
  • the connecting bus bar and the bus bar between the on-state branch valve tower and the current limiting branch valve tower which constitute the whole of the high-voltage circuit breaker valve tower are located inside the valve tower, and do not exceed the square contour of the circuit breaker valve tower.
  • the on-state valve layer and the n-layer structure of the fast mechanical switch form a square on-state valve tower.
  • the on-state valve layer and the fast switching tower of each layer have the same length, width and height, common
  • a valve tower configuration having a square outer profile is formed and has a modular construction that is expanded with voltage levels that are connected to the metal frame of the layer by posts or suspension insulators corresponding to the design voltage level.
  • the square restrictor valve tower includes a flow restricting valve layer composed of a plurality of straight-line type restrictor valve assemblies, and each of the restrictor valve valve layers is composed of at least one set of restrictor valve assemblies connected in series to realize With a high voltage level, each of the restrictor valve layers is composed of at least one restrictor valve assembly connected in parallel to achieve a higher current level, and the flow restricting valve layers are connected by a strut or a suspension insulator corresponding to the design voltage level.
  • an expandable square restrictor valve tower that forms a layered structure.
  • the square current limiting branch valve tower further includes a layered arrester tower, and the arrester layer is connected to the metal frame of the layer through a strut or a suspension insulator corresponding to the design voltage level to form a layer.
  • the structure of the expandable square arrester tower advantageously, the arrester tower has the same length, layer height, number of layers as the restrictor valve tower, the width of which will be determined by the absorbed energy of the design, and further, the width of the arrester tower and the restrictor valve tower The direction is juxtaposed to form a square valve tower of the current limiting branch.
  • an inspection platform is arranged between the arrester valve tower and the restrictor valve tower of each floor.
  • Each layer of the arrester valve tower further includes an interlayer energy supply unit that powers the flow restricting valve layer module.
  • the main body of the circuit breaker valve tower is fixed to the insulator structure by support or suspension, and the insulator has the same structure and is fixed on the metal frame of the circuit breaker valve.
  • the circuit breaker valve tower further includes a main power supply transformer for powering the fast mechanical switch and the current limiting valve assembly hardware device, and the main power supply transformer is disposed within the outer contour range of the circuit breaker valve tower.
  • the straight-line type restrictor valve assembly includes at least one set of IGBT straight-series press-fit valve stacks, and a plurality of press-fit valve stacks are connected in series before and after, and the restrictor valve assembly includes at least two sets of diodes for current commutation Pressurizing the valve stack, and the number of diode press-on valve stacks is twice that of the IGBT press-fit valve stack, and the voltage of the diode-pressed valve stack is twice that of the IGBT press-fit valve stack, and the IGBT press-fit valve stack also includes A voltage equalizing RCD component corresponding to the IGBT, the RCD component may be disposed on the front and rear sides or the upper and lower sides of the IGBT press-fit stack, and the diode press-fit valve stack further includes a diode-corresponding equalizing RC component, and the RC component may Arranged on the front and rear sides or upper and lower sides of the diode press stack.
  • the direct-series current limiting valve assembly includes a power supply coil for energizing the IGBT driving module, and the number of energizing coils is in one-to-one correspondence with the IGBT.
  • the IGBT press-fit valve stack includes spaced-apart heat sinks, IGBT devices, insulating tie rods, and press-fit plates. Conveniently, one side with hydraulic loading tooling is disposed on the outside when it is connected in series.
  • the diode press-fit valve stack includes spaced-apart heat sinks, diode devices, insulating tie rods, and press-fit plates. Conveniently, the side with the hydraulic loading tool is disposed on the outside when it is connected in series.
  • the restrictor valve tower and the arrester tower are connected to the respective metal frames through the strut insulators at the same layer to form a square current limiting branch valve tower frame, which advantageously improves the overall seismic performance of the valve tower.
  • the on-state valve tower and the current-limiting bypass valve tower are connected to the respective metal frames through the strut insulators at the same layer to form a square circuit breaker valve tower frame, which advantageously improves the overall seismic performance of the valve tower.
  • the cable-stayed insulator is arranged to improve the overall strength and stability of the structure, and the overall seismic performance of the valve tower is advantageously improved.
  • Figure 1 is a schematic view showing the structure of a square valve tower of the present invention
  • Figure 2 is a structural view of the restrictor valve section unit of the present invention.
  • Figure 3 is a structural view showing the restriction valve layer of the present invention.
  • Figure 4 is a structural view showing the square valve tower of the on-state branch of the present invention.
  • Figure 5 is a structural view of a square valve tower of the present invention.
  • Figure 6 is a structural view showing an embodiment of the suspension form of the present invention.
  • Figure 7 shows an electrical topology diagram of the present invention
  • 1-layer pillar or suspension insulator 2-layer cable-stayed insulator, 3-diode valve assembly, 4-shield, 5-metal frame, 6-valve assembly support insulator, 7-drive module, 8- Igbt valve assembly, 9-RCD assembly, 10-restricted valve section unit, 11-interconnected busbar, 12-striker valve section unit, 13-energized unit, 14-mechanical switch valve layer, 15-way valve layer, 16-support or suspension insulator, 17-square on-state valve tower, 18-square restrictor valve tower.
  • FIG. 1 to 6 sequentially illustrate an embodiment of a complete hybrid circuit breaker including a fast mechanical switch, an on-state valve, a restrictor valve tower, and a surge arrester provided by the present invention. Obviously, it has a regular square profile.
  • the tower structure makes it have obvious advantages of small footprint and simple layout.
  • the design voltage level of the current limiting valve assembly is 25 kV, and the two-stage series method is used to realize the 50 kV voltage level sub-unit. Further, the same layer of the current limiting valve structure is implemented by two sets of the same 50 kV voltage level components.
  • the 100kV current limiting valve layer as an optional configuration, can be used to increase the current rating in two groups and in parallel with the upper flow valve assembly. As shown in Figure 3 of the embodiment.
  • the inlet and outlet lines of the restrictor valve assembly are located at the midpoint of the diode valve stack in the H-bridge configuration.
  • a lightning arrester valve layer Corresponding to the restrictor valve layer is a lightning arrester valve layer with the same layer height and length.
  • Pillar insulators form a stable restrictor branch valve layer frame.
  • Each layer of the arrester valve layer includes an interlayer power supply unit functioning as an IGBT power device in which the layer is located.
  • the interlayer power supply transformer is located on one side of the interior of the arrester valve layer, and correspondingly, the main power supply transformer is located at the layer The axial direction of the transformer, which allows the circuit breaker valve tower to have a regular overall outer contour.
  • Two adjacent current limiting branch valve layers are connected to the respective metal frames by struts or suspension insulators to realize a series connection of multiple layers.
  • the arrangement of the diagonally pulled insulators of each layer will effectively strengthen the overall structure. Support strength and seismic capacity.
  • Figure 1 shows a strut embodiment of the circuit breaker of the present invention: the adjacent two layers are connected to each other by interlayer post insulators, and the last layer of each square valve tower is fixed to The high voltage post insulator on the bottom; it is apparent that for the square valve tower circuit breaker de-valve structure of the present invention, the voltage level expansion is easy to implement.
  • the square circuit breaker valve tower can be realized by the suspension embodiment, that is, the interlayer pillar insulator and the high voltage pillar insulator are respectively replaced by interlayer suspension insulators and high voltage suspension insulators, as shown in FIG. 7 of the embodiment.

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Abstract

一种方形布置的混合型直流断路器阀结构,其由通态支路、限流支路、耗能支路组成:其通态支路由分层分布的塔式快速开关和位于最底层的通态阀层构成方形的通态支路阀塔,其限流支路由分层分布的功率器件阀堆构成方形的阀塔,其耗能支路由避雷器器件构成方形结构的耗能支路塔,上述三种阀塔只要有一条边长或宽度方向上共用,从而使得混合型断路器的整体呈规格的方形阀塔结构,有利地减小阀塔的体积、减小占地面积、方便接线布置;同时,阀塔可以方便地实现悬吊和支撑两种阀厅布置方案。

Description

一种方形布置的混合型直流断路器阀结构 技术领域
本发明属于直流断路器,具体涉及一种方形布置的混合型直流断路器阀结构。
背景技术
随着多端直流输电技术的发展,高压直流断路器将成为保证系统安全稳定运行的关键设备之一。
混合式直流断路器作为众多解决方案之一备受关注。根据混合式断路器的工作原理,其一般包含IGBT阀塔组件、快速开关组件、通态支路组件,体积庞大,尤其是最为电流转移关键器件的快速开关组件的存在,使得阀塔布局多呈不规则状态,体积大,重量重,不利于阀厅内的进出线布置检修维护。
CN201610357836.6公开了一种直流断路器阀塔结构,但其不包含快速机械开关部件,仅对IGBT阀组件进行了阐述。工程应用中的阀厅布置还需额外考虑开关部件、通态阀层的占地及支撑基础。本案结合自主研发的混合式直流断路器拓扑结构将快速机械开关、IGBT阀组件塔、通态阀层有机组合成为相对独立又互相关联的阀塔,其公用边设计使得整体断路器具有规则的外方形外轮廓,具有占地小、重量轻的特点。
发明内容
由本发明提供一种完整的、规则方形布置的混合型断路器阀结构,其包含快速机械开关、串联的功率器件阀堆、耗能避雷器。
本发明的混合型高压直流断路器阀,其包含转移支路、通态支路及耗能支路,其特征在于:所述支路各自组成分层串联结构的方形阀塔,所述各方形阀塔通过共用至少一条边长组成具有规则方形轮廓的高压直流断路器阀塔。
所述转移支路由模块化设计组成的子单元通过同层串联连接、层间串联连接方式组成方形阀塔;上下两层子单元之间,同一水平层之间通过支柱或悬吊绝缘子连接在各自的支撑框架上,其高度和耗能支路阀塔、通态支路阀塔相同,其长度和耗能支路阀塔相同。
所述耗能支路由模块化设计组成的避雷器子单元组成平行叠加结构的方形阀塔;上下两层子单元之间,同一水平层之间通过支柱或悬吊绝缘子连接在各自的支撑框架上;其高度与长度和限流支路阀塔相同;其相邻两层电位差和限流阀塔相同。
所述转移支路方形阀塔及3所述的耗能支路方形阀塔通过分层并联连接的方式组成方形限流支路阀塔;所述3阀塔的长度、高度、层高、层数保持一致,限流阀塔的宽度为转移支路方形阀塔及和耗能支路方形阀塔宽度之和。
所述通态支路由首层通态阀塔层和平行位于其上的n层开关塔组成n+1层方形阀塔;首层和n层具有相同的长、宽、高尺寸,其且总高度和权利要求4所述的限流支路阀塔相同。
所述的通态支路阀塔,其长度和权利要求4所述的方形限流阀塔的宽度相同,二者共同构成高压直流断路器方形阀塔外轮廓。
所述高压直流断路器包含至少两套独立的高压供能设备,分别为限流支路阀塔及通态支路阀塔供能;且所述高压供能设备位于高压直流断路器方形塔的于地平面的方形投影范围内。
所述高压直流断路器顶部布置有均压环,且所述均压环同时作为通态支路阀塔和限流支路阀塔之间的电流通道。
组成所述高压断路器阀塔整体的通态支路阀塔、限流支路阀塔之间的连接母线、母排位于阀塔内部,不超出断路器阀塔的方形轮廓。
根据本发明,通态阀层和n层结构的快速机械开关组成方形的通态阀塔,有利地,通态阀层和每一层的快速开关塔具有相同的长度、宽度和层高,共同组成具有规格方形外轮廓的阀塔构造,并具有随电压等级扩充的模块化构造,所述阀层之间通过与设计电压等级对应的支柱或悬式绝缘子连接在层的金属框架上。
根据本发明,所述方形限流阀塔,包括多层直串式限流阀组件组成的限流阀层,每个限流阀阀层由至少一组限流阀组件串联连接组成以实现更高的电压等级,每个限流阀阀层由至少一限流阀组件并联连接组成以实现更高的电流等级,限流阀层之间通过与设计电压等级对应的支柱或悬式绝缘子连接在层的金属框架上,构成分层结构的可扩充的方形限流阀塔。
根据本发明,所述方形限流支路阀塔,还包括分层结构的避雷器塔,避雷器层之间通过与设计电压等级对应的支柱或悬式绝缘子连接在层的金属框架上,构成分层结构的可扩充的方形避雷器塔,有利地,避雷器塔具有和限流阀塔相同的长度、层高、层数,其宽度将由设计吸收能量确定,进一步地,避雷器塔和限流阀塔沿宽度方向并列组成限流支路的方形阀塔。
所述限流支路阀塔上,在每一层的避雷器阀塔和限流阀塔之间设有检修平台。
所述避雷器阀塔的每一层,还包含为限流阀层模块供能的层间供能单元。
所述断路器阀塔主体采用支撑或者悬吊方式固定于绝缘子结构上,绝缘子具有相同的构造且固定于断路器阀的金属框架上。
所述断路器阀塔还包含为快速机械开关、限流阀组件硬件设备供能的主供能变压器,且主供能变压器布置在断路器阀塔的外轮廓范围之内。
所述直串式限流阀组件包含至少一组IGBT直串式压装阀堆,多个以上压装阀堆采用前后串联方式连接,限流阀组件包含至少两组用于电流换向的二极管压装阀堆,且二极管压装阀堆的数量是IGBT压装阀堆的两倍,二极管压装阀堆的电压等级是IGBT压装阀堆的两倍,所述IGBT压装阀堆还包含与IGBT一一对应的均压RCD组件,RCD组件可以布置于IGBT压装堆的前后侧或上下侧,所述二极管压装阀堆还包含于二极管一一对应的均压RC组件,RC组件可以布置于二极管压装堆的前后侧或上下侧。
所述直串式限流阀组件包含为IGBT驱动模块供能的供能线圈,供能线圈的数量和IGBT一一对应。
所述IGBT压装阀堆包含间隔排列的散热器、IGBT器件,绝缘拉杆、压装板,方便地,当其串联时带有液压加装工装的一侧布置在外侧。
所述二极管压装阀堆包含间隔排列的散热器、二极管器件,绝缘拉杆、压装板,方便地,当其串联时带有液压加装工装的一侧布置在外侧。
所述限流阀塔和避雷器塔在同一层间通过支柱绝缘子连接于各自的金属框架,共同构成方形的限流支路阀塔框架,有利地提高阀塔整体的抗震性能。
所述通态阀塔和限流支路阀塔在同一层间通过支柱绝缘子连接于各自的金属框架,共同构成方形的断路器阀塔框架,有利地提高阀塔整体的抗震性能。
所述直流断路器阀塔的各层间支柱绝缘子和其固定其上的金属框架组成的平面内,布置斜拉绝缘子,提高结构的整体强度及稳定性,有利地提高阀塔整体的抗震性能。
附图说明
图1给出了本发明方形阀塔结构示意图;
图2给出了本发明限流阀段单元结构图;
图3给出了本发明限流阀层结构图;
图4给出了本发明通态支路方形阀塔结构图;
图5给出了本发明方形阀塔结构图;
图6给出了本发明悬吊形式实施例的结构图;
图7给出了本发明电气拓扑图;
其中,1-层间支柱或悬吊绝缘子,2-层间斜拉绝缘子,3-二极管阀组件,4-屏蔽罩,5-金属框架,6-阀组件支撑绝缘子,7-驱动模块,8-igbt阀组件,9-RCD组件,10-限流阀段单元,11-互联母排,12-避雷器阀段单元,13-供能单元,14-机械开关阀层,15-通态阀层,16-支撑或悬吊绝缘子,17-方形通态阀塔,18-方形限流阀塔。
具体实施方式
以下将结合附图,对本发明的技术方案进行详细说明。
图1至图6依次展示了本发明所提供的一种包含有快速机械开关、通态阀、限流阀塔、避雷器塔的完整混合式断路器实施例,显而易见地,其具有规则方形轮廓的塔式结构使得其有明显的占地小、布局简洁的优势。
本实施例中,限流阀组件的设计电压等级为25kV,其采用两组串联的方式实现50kV电压等级子单元,进一步地,同一层的限流阀构造采用两组相同的50kV电压等级组件实现100kV限流阀层,作为一种可选的配置,可以采用两组及以上限流阀组件并联的方式提高电流等级。如实施例图3所示。
限流阀组件的进出线位于呈H桥构造的二极管阀堆的中点位置,通过铜排的合理布置,即可以完成水平方向的同层串联,也可以完成层间方向的串连。
与限流阀层相对应的是具有相同层高、长度的避雷器阀层,装配时同一层的限流阀层和避雷器阀层同时施工,并在安装下一层之前完成连接二者之间的支柱绝缘子,组成稳固的限流支路阀层框架。
每一层避雷器阀层包含层间供能单元为本层所在的IGBT功率器件功能,本实施例中,层间供能变压器位于避雷器阀层内部的一侧,相应地,主供能变压器位于层间变压器的轴线方向,这使得断路器阀塔具有规则的整体外轮廓。
两个相邻的限流支路阀层之间用支柱或悬式绝缘子连接在各自的金属框架上,实现多层的串连,有利地,各层斜拉绝缘子的布置将有效地强化整体结构的支撑强度和抗震 能力。
图1给出了本发明所述断路器的支柱实施方案:即相邻的两层之间通过层间支柱绝缘子连接在各自的框架上,同时,各个方形阀塔的最后一层阀层固定于底部的高压支柱绝缘子上;显而易见,对于本发明的方形阀塔式断路器去阀结构,电压等级的扩充是易于实现的。
相应的,上述方形断路器阀塔可以通过悬吊实施方案实现,即层间支柱绝缘子、高压支柱绝缘子分别更换为层间悬式绝缘子、高压悬式绝缘子,如实施例图7所示。
以上实施例仅用以说明本发明的技术方案而非对其限制,尽管本领域的技术人员阅读本申请后,参照上述实施例本本发明进行种种修改或变更,但这些修改或变更均在申请待批本发明的权利申请要求保护范围之内。

Claims (8)

  1. 一种方形布置的混合型直流断路器阀结构,包括转移支路、通态支路及耗能支路,其特征在于:所述支路各自组成分层串联结构的方形阀塔,所述各方形阀塔通过共用至少一条边长组成具有规则方形轮廓的高压直流断路器阀塔。
  2. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:所述转移支路的方形阀塔由模块化设计组成的子单元通过同层串联连接、层间串联连接方式组成方形阀塔;
    上下两层子单元之间、同一水平层之间通过支柱或悬吊绝缘子连接在各自的支撑框架上,转移支路的高度和耗能支路阀塔、通态支路阀塔相同,转移支路的长度和耗能支路阀塔相同。
  3. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:所述耗能支路的方形阀塔由模块化设计组成的避雷器子单元组成平行叠加结构的方形阀塔;
    上下两层子单元之间、同一水平层之间通过支柱或悬吊绝缘子连接在各自的支撑框架上;
    耗能支路的高度与长度和限流支路阀塔相同;
    耗能支路相邻两层电位差和限流阀塔相同。
  4. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:所述转移支路的方形阀塔及耗能支路的方形阀塔,通过分层并联连接的方式组成限流支路的方形阀塔;
    转移支路、耗能支路和限流支路三个方形阀塔的长度、高度、层高、层数保持一致,限流支路方形阀塔的宽度为转移支路方形阀塔及和耗能支路方形阀塔宽度之和。
  5. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:所述通态支路由首层通态阀塔层和平行位于其上的n层开关塔组成n+1层方形阀塔;
    首层和平行位于其上的n层具有相同的长、宽、高尺寸,其且总高度和限流支路方形阀塔相同。
  6. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:还包括至少两套独立的高压供能设备,分别为限流支路阀塔及通态支路阀塔供能;
    所述高压供能设备位于高压直流断路器方形塔的于地平面的方形投影范围内。
  7. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:还包括设置于阀结构顶部的均压环,所述均压环同时作为通态支路阀塔和限流支路阀塔之间的电流通道。
  8. 如权利要求1所述的一种方形布置的混合型直流断路器阀结构,其特征在于:组成混合型直流断路器阀塔整体的通态支路方形阀塔、限流支路方形阀塔之间的连接母线、母排位于阀塔内部,不超出断路器塔的方形轮廓。
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