WO2019024288A1 - 直流快速开关手车及使用该手车的直流断路器柜 - Google Patents

直流快速开关手车及使用该手车的直流断路器柜 Download PDF

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WO2019024288A1
WO2019024288A1 PCT/CN2017/108607 CN2017108607W WO2019024288A1 WO 2019024288 A1 WO2019024288 A1 WO 2019024288A1 CN 2017108607 W CN2017108607 W CN 2017108607W WO 2019024288 A1 WO2019024288 A1 WO 2019024288A1
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circuit breaker
main
branch
switch
fast
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PCT/CN2017/108607
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English (en)
French (fr)
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王蝶
韩桂全
吴军辉
韩国辉
庞素敏
李旭旭
卢彦辉
刘庆
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平高集团有限公司
国家电网公司
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Publication of WO2019024288A1 publication Critical patent/WO2019024288A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type

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  • the invention relates to a DC fast switching handcart in the field of high voltage switch and a DC circuit breaker cabinet using the same.
  • Hybrid circuit breakers combine the advantages of mechanical circuit breakers and solid state circuit breakers.
  • the main flow branch, the transfer branch and the energy-consuming branch are mainly composed of mechanical quick opening; the main breaking principle is: forced breaking by fast mechanical switch, and control of the transfer of power electronic components
  • the branch circuit rapidly reduces the short-circuit current on the fast mechanical switch, and uses the ZnO arrester to form the energy-consuming branch to absorb the energy of the system, and finally realizes the reliable breaking of the entire branch. It has the characteristics of low cost, high breaking capacity and small size.
  • the above-mentioned hybrid circuit breaker can also refer to a natural commutation type hybrid DC circuit breaker disclosed in the Chinese Utility Model Patent No. CN204732355U and the announcement date of 2015.10.28, and the breaking principle adopted is the above-mentioned opening. Break principle.
  • the medium voltage DC circuit breaker cabinet has added a branch branch to the AC cabinet.
  • the intuitive idea is to use a fixed connection.
  • fixed connections are limited in application for a variety of reasons. This is because: First, the fast mechanical switch has a large volume and weight, and requires frequent maintenance and overhaul, and the fixed connection makes it inconvenient to disassemble. Second, in order to meet the safety inspection, the high-voltage isolating switch must be used between the commutating branch and the fast mechanical switch to form a safe and reliable air isolation fracture.
  • the high-voltage isolating switch is bulky, inconvenient to operate, and makes the branch circuit wiring. Complex, security risks are significant.
  • the object of the present invention is to provide a DC fast switching handcart, which solves the problems of inconvenient maintenance, complicated branch wiring and large volume of the existing DC circuit breaker.
  • the object of the present invention is to provide a use of the DC circuit breaker.
  • the technical solution of the DC fast switching handcart is that the DC fast switching handcart includes a vehicle body and a fast mechanical switch disposed on the vehicle body, and the two ports of the fast mechanical switch are respectively connected and used. a main port connected to two terminals of the main through-current branch of the DC circuit breaker, the two main ports are respectively electrically connected to form a parallel connection with the commutating branch and the energy-consuming branch in the DC circuit breaker Secondary port.
  • the main port and the sub port are formed by a main contact arm and a sub-contact arm, respectively.
  • An electrically conductive connection is realized between the main contact arms and the corresponding sub-contact arms by a commutated bus bar.
  • the fast mechanical switches are vertically disposed in a vertical direction, and each of the main contact arms and the corresponding sub-contact arms are disposed in the same horizontal plane.
  • the DC circuit breaker cabinet includes a DC circuit breaker, and further includes a DC fast switching handcar for controlling the DC circuit breaker to be turned on and off
  • the DC fast switching hand truck includes a vehicle. a body and a quick mechanical switch disposed on the vehicle body, the two ports of the fast mechanical switch are respectively connected with a main port for connecting with two terminals of the main flow branch on the DC circuit breaker, and the two main ports are respectively electrically conductive Connected with a commutation branch for use in a DC breaker
  • the road and the energy consuming branch form a secondary port that is connected in parallel.
  • the main port and the sub port are formed by a main contact arm and a sub-contact arm, respectively.
  • the electrically conductive connection is realized by a commutating busbar between each of the main contact arms and the corresponding secondary contact arm.
  • the fast mechanical switches are vertically disposed in a vertical direction, and each of the main contact arms and the corresponding sub-contact arms are disposed in the same horizontal plane.
  • the invention has the beneficial effects that the invention integrates the main port connected with the main flow branch and the auxiliary port for connecting with the transfer branch and the energy consumption branch on the same handcart; when the handcart enters In the working position, the two main ports are connected with the main through-flow branch in the DC circuit breaker, and the two auxiliary ports are connected in parallel with the transfer branch and the energy-consuming branch in the DC breaker, the main through-flow branch and the transfer
  • the branch road and the energy-consuming branch road are respectively connected at the same time; when the hand truck exits the working position, the main flow branch branch, the transfer branch road and the energy-consuming branch road are respectively disconnected at the same time, and each port is formed with a safe and reliable air isolation fracture.
  • the large isolation switch is omitted, the wiring mode is simplified, the volume of the DC circuit breaker is greatly reduced, the product is miniaturized, the operation is simplified, and the maintenance of the fast mechanical switch is facilitated. .
  • Figure 1 is a schematic diagram of a hybrid circuit breaker
  • FIG. 2 is a schematic structural view of a specific embodiment of a DC fast switching handcart according to the present invention.
  • the vehicle body 1 and the traveling wheel disposed at the bottom of the vehicle body 1 are provided with a frame 17 on the vehicle body 1 for the vehicle body. 1 can walk through the walking wheel.
  • the vehicle body 1 is provided with a quick mechanical switch 2, which is composed of an upper integrally cast solid sealing pole containing a vacuum interrupter and a lower quick mechanical device.
  • the quick mechanism is mounted in the rear side portion of the frame 17.
  • a contact arm for connecting to the main flow branch, the transfer branch and the energy-consuming branch on the DC circuit breaker is respectively provided at the position of the fast mechanical switch 2 and the vehicle body 1 near the fast mechanical switch 2.
  • the vehicle body 1 has an L-shaped structure, and an electronic power device for controlling the action of the quick mechanical switch 2 is provided in the front side portion of the frame 17, and the quick mechanical switch 2 and each of the contact arms are disposed in the L-shaped structure of the vehicle body 1.
  • a corner of the L-shaped structure; the fast mechanical switch 2 is vertically disposed on the horizontal wall of the L-shaped structure; the solid-sealed pole of the fast mechanical switch 2 has an upper port and a lower port, and the upper port is provided with a first
  • the contact arm 3 is provided with a second contact arm 5 at the lower port.
  • the vertical wall of the L-shaped structure of the vehicle body 1 is provided with a third contact arm 7 and a fourth contact arm 9 spaced apart in the vertical direction at a position close to the fast mechanical switch 2; the third contact arm 7 and the first Corresponding to the contact arm 3, the fourth contact arm 9 corresponds to the second contact arm 5; the first contact arm 3 and the third contact arm 7 are connected by the first commutated busbar 15; the second contact arm 5 and the fourth contact The arms 9 are connected by a second commutating busbar 16.
  • each of the contact arms comprises a cylinder and a contact disposed at an end of the cylinder; wherein the first contact arm 3 has a first contact 4, and the second contact arm 5 has a second contact 6,
  • the three-contact arm 7 has a third contact 8 and the fourth contact arm 9 has a fourth contact 10.
  • the first contact arm 3 and the second contact arm 5 respectively form a main port A and a main port B for connection to a main flow branch in the DC open circuit; the third contact arm 7 and the fourth contact arm 9 are respectively formed
  • the sub-port C and the sub-port D are connected in parallel with the commutation branch and the energy-consuming branch in the DC circuit breaker.
  • the contacts on the respective arm are respectively connected with the corresponding static contacts on the DC circuit breaker; wherein the first contact 4 is connected with the static contact 12, and the second contact 6
  • the stationary contact 14 is connected, the third contact 8 is connected to the stationary contact 11 , and the fourth contact 10 is connected to the stationary contact 13 .
  • the main through-flow branch, the commutating branch and the energy-consuming branch in the DC circuit breaker are respectively connected at the same time; when the handcart is away from the working position, the main through-flow branch in the DC circuit breaker, The commutating branch and the energy-consuming branch are respectively disconnected at the same time, and a safe and reliable air isolation fracture is formed at the main port A, the main port B, the sub-port C and the sub-port D, respectively.
  • the present invention integrates the main port connected to the main flow branch and the sub-port for parallel connection with the transfer branch and the energy-consuming branch, and the same handcart is omitted.
  • the large size of the isolating switch simplifies the wiring mode, greatly reduces the size of the DC circuit breaker, makes the product compact, easy to operate, and facilitates the maintenance of the fast mechanical switch 2.
  • two or more fast mechanical switches may be disposed on the vehicle body, and each of the fast mechanical switches is respectively provided with a main contact arm, and each of the main contact arms is electrically connected with a sub-contact arm.
  • the DC circuit breaker cabinet comprises a DC circuit breaker and a DC fast switching handcart for controlling the switching of the DC circuit breaker, and the structure of the DC fast switching handrail is as described above.
  • the embodiment of the DC fast-switch handcart of the present invention has the same structure, and therefore will not be described again.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

一种直流快速开关手车及使用该手车的直流断路器柜属于高压开关领域；直流快速开关手车包括车体（1）和设置在车体（1）上的快速机械开关（2），快速机械开关（2）的两个端口分别连接有用于与直流断路器上的主通流支路的两个接线端连接的主端口（A、B），两个主端口（A、B）分别导电连接有用于与直流断路器中的换流支路和耗能支路形成并联连接的副端口（C、D）。将用于与主通流支路连接的主端口（A、B）和用于与转移支路和耗能支路形成并联连接的副端口（C、D）集成在同一手车上，省去了体积较大的隔离开关，简化了接线方式，从而大大缩减了直流断路器的体积，使得产品小型化、操作简易化，且方便对快速机械开关的检修。

Description

直流快速开关手车及使用该手车的直流断路器柜
相关申请的交叉引用
本专利申请要求2017年7月31日提交的中国专利申请号为201710642242.4，发明名称为“直流快速开关手车及使用该手车的直流断路器柜”的优先权，该申请的全文以引用的方式并入本申请中。
技术领域
本发明涉及高压开关领域中的直流快速开关手车及使用该手车的直流断路器柜。
背景技术
目前中压直流断路器开关主要有三种形式：基于自能振荡或他能振荡的机械式直流断路器、基于电力电子技术的固态直流断路器、基于电力电子技术和机械开关技术的混合式直流断路器。其中，机械式断路器可控性差，直流开断困难。固态断路器虽然开断时间短，寿命长和工作可靠，但其成本高，通态功耗大，过载换流保护难度大，电力电子产品均压均流技术不成熟，控制检测技术复杂，因此全面推广应用较困难。
混合式断路器综合了机械式断路器和固态断路器的分断优点。如图1所示，主要由机械快速开的主通流支路、转移支路和耗能支路组成；主要开断原理为：由快速机械开关强制开断，同时控制电力电子元件组成的转移支路使快速机械开关上的短路电流迅速降低，并采用ZnO避雷器等组成耗能支路吸收系统能量，最终实现整个支路的可靠分断。具有成本低、分断能力高和体积小等特点。上述混合式断路器也可以参考如公告号为CN204732355U、公告日为2015.10.28的中国实用新型专利所公开的一种自然换流型混合式直流断路器，其采用的开断原理即为上述开断原理。
中压直流断路器柜相对交流柜增加了转移支路，尚无简单、可靠、方便的连接与隔离方式，直观的想法是采用固定式连接。但固定式连接由于多方面原因应用起来比较受限。这是因为：其一，快速机械开关体积和重量较大，且需要经常维护和检修，固定式连接导致其拆卸不便。其二，为满足安全检修，换流支路与快速机械开关之间必须配套高压隔离开关使用，以便形成安全可靠的空气隔离断口，而高压隔离开关体积较大，操作不便，更使得分支电路接线复杂，安全隐患显著。
发明内容
本发明的目的在于提供一种直流快速开关手车，用以解决现有的直流断路器存在的检修不便、支路接线复杂、体积较大的问题；本发明的目的还在于提供一种使用该手车的直流断路器柜。
为实现上述目的，根据本发明实施例的直流快速开关手车的技术方案是：直流快速开关手车包括车体和设置在车体上的快速机械开关，快速机械开关的两个端口分别连接有用于与直流断路器上的主通流支路的两个接线端连接的主端口，两个主端口分别导电连接有用于与直流断路器中的换流支路和耗能支路形成并联连接的副端口。
所述主端口和副端口分别由主触臂和副触臂形成。
各所述主触臂与对应的副触臂之间以换流母排实现导电连接。
所述快速机械开关沿竖直方向竖直设置，各主触臂与对应的副触臂布置在同一水平面中。
根据本发明的实施例的直流断路器柜的技术方案是：直流断路器柜包括直流断路器，并且还包括用于控制直流断路器通断的直流快速开关手车，直流快速开关手车包括车体和设置在车体上的快速机械开关，快速机械开关的两个端口分别连接有用于与直流断路器上的主通流支路的两个接线端连接的主端口，两个主端口分别导电连接有用于与直流断路器中的换流支 路和耗能支路形成并联连接的副端口。
所述主端口和副端口分别由主触臂和副触臂形成。
各所述主触臂与对应的副触臂之间以换流母排实现所述的导电连接。
所述快速机械开关沿竖直方向竖直设置，各主触臂与对应的副触臂布置在同一水平面中。
本发明的有益效果是：本发明将用于与主通流支路连接的主端口和用于与转移支路和耗能支路连接的副端口集成在同一手车上；当手车进入到工作位置时，两个主端口与直流断路器中的主通流支路连接，两个副端口与直流断路器中的转移支路和耗能支路形成并联连接，主通流支路、转移支路和耗能支路同时分别接通；当手车退出工作位置时，主通流支路、转移支路和耗能支路同时分别断开，各端口处分别形成安全可靠地空气隔离断口；相比于现有技术，省去了体积较大的隔离开关，简化了接线方式，从而大大缩减了直流断路器的体积，使得产品小型化、操作简易化，且方便对快速机械开关的检修。
附图说明
图1为混合式断路器的原理图；
图2为根据本发明的直流快速开关手车的一个具体实施例的结构示意图。
具体实施方式
下面结合附图对本发明的实施方式作进一步说明。
在根据本发明的直流快速开关手车的一个具体实施例中，如图2所示，包括车体1和设置在车体1底部的行走轮，车体1上设有车架17，车体1可通过行走轮行走。车体1上设有快速机械开关2，快速机械开关2由上部的一体浇注的含有真空灭弧室的固封极柱和下部的快速机械装置组成，其 中，快速机械装置安装在车架17的后侧部分内。快速机械开关2上及车体1上靠近快速机械开关2的位置处分别设有用于与直流断路器上的主通流支路、转移支路和耗能支路连接的触臂。
车体1为L形结构，车架17的前侧部分中设有用于控制快速机械开关2的动作的电子电力器件，快速机械开关2和各所述触臂设置在车体1的L形结构的拐角处；其中，快速机械开关2沿竖直方向竖直地设置在L形结构的水平壁上；快速机械开关2的固封极柱具有上端口和下端口，上端口处设有第一触臂3，下端口处设有第二触臂5。
车体1的L形结构的竖直壁上在靠近快速机械开关2的位置处设有沿竖直方向间隔设置的第三触臂7和第四触臂9；第三触臂7与第一触臂3对应，第四触臂9与第二触臂5对应；第一触臂3与第三触臂7之间以第一换流母排15连接；第二触臂5与第四触臂9之间以第二换流母排16连接。
各触臂的结构一致，触臂包括筒体和设置在筒体端部的触头；其中，第一触臂3具有第一触头4，第二触臂5具有第二触头6，第三触臂7具有第三触头8，第四触臂9具有第四触头10。
第一触臂3和第二触臂5分别形成用于连接到直流断路中的主通流支路中的主端口A和主端口B；第三触臂7和第四触臂9分别形成用于与直流断路器中的换流支路和耗能支路形成并联连接的副端口C和副端口D。
工作中，当手车进入工作位置时，各触臂上的触头分别与直流断路器上对应的静触头连接；其中，第一触头4与静触头12连接、第二触头6与静触头14连接、第三触头8与静触头11连接、第四触头10与静触头13连接。
触头连接完成后，直流断路器中的主通流支路、换流支路和耗能支路同时分别连通；当手车驶离工作位置时，直流断路器中的主通流支路、换流支路和耗能支路同时分别断开，并且在主端口A、主端口B、副端口C和副端口D处分别形成安全可靠的空气隔离断口。
相比于现有技术，本发明将用于与主通流支路连接的主端口和用于与转移支路、耗能支路形成并联连接的副端口集成在同一手车上，省去了体积较大的隔离开关，简化了接线方式，大大缩减了直流断路器的体积，使得产品小型化、操作简易化，且方便对快速机械开关2的检修。
在其他实施例中，也可以在车体上设置两个以上的快速机械开关，各快速机械开关上分别设有主触臂，各主触臂上分别导电连接有副触臂。
在根据本发明的直流断路器柜的一个具体实施例中，直流断路器柜包括直流断路器和用于控制直流断路器的通断的直流快速开关手车，直流快速开关手车的结构与上述本发明的直流快速开关手车的任一实施例的结构相同，因此，不再赘述。

Claims (8)

  1. 一种直流快速开关手车，包括车体和设置在车体上的快速机械开关，快速机械开关的两个端口分别连接有用于与直流断路器上的主通流支路的两个接线端连接的主端口，每个主端口电连接有用于与直流断路器中的换流支路和耗能支路形成并联连接的副端口。
  2. 根据权利要求1所述的直流快速开关手车，其中，所述主端口和副端口分别由主触臂和副触臂形成。
  3. 根据权利要求2所述的直流快速开关手车，其中，各所述主触臂与对应的副触臂之间以换流母排实现所述电连接。
  4. 根据权利要求2或3所述的直流快速开关手车，其中，所述快速机械开关沿竖直方向竖直设置，各主触臂与对应的副触臂布置在同一水平面中。
  5. 一种直流断路器柜，包括直流断路器，还包括用于控制直流断路器通断的直流快速开关手车，直流快速开关手车包括车体和设置在车体上的快速机械开关，快速机械开关的两个端口分别连接有用于与直流断路器上的主通流支路的两个接线端连接的主端口，每个主端口电连接有用于与直流断路器中的换流支路和耗能支路形成并联连接的副端口。
  6. 根据权利要求5所述的直流断路器柜，其中，所述主端口和副端口分别由主触臂和副触臂形成。
  7. 根据权利要求6所述的直流断路器柜，其中，各所述主触臂与对应的副触臂之间以换流母排实现所述电连接。
  8. 根据权利要求6或7所述的直流断路器柜，其中，所述快速机械开关沿竖直方向竖直设置，各主触臂与对应的副触臂布置在同一水平面中。
PCT/CN2017/108607 2017-07-31 2017-10-31 直流快速开关手车及使用该手车的直流断路器柜 WO2019024288A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710642242.4 2017-07-31
CN201710642242.4A CN109326984B (zh) 2017-07-31 2017-07-31 直流快速开关手车及使用该手车的直流断路器柜

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