CN112073043B - Branch switch assembly for direct current breaker - Google Patents
Branch switch assembly for direct current breaker Download PDFInfo
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- CN112073043B CN112073043B CN201910502543.6A CN201910502543A CN112073043B CN 112073043 B CN112073043 B CN 112073043B CN 201910502543 A CN201910502543 A CN 201910502543A CN 112073043 B CN112073043 B CN 112073043B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The utility model relates to a branch switch component for a direct current breaker, which comprises a component frame, wherein an IGBT valve section and a main loop diode valve section are arranged on the component frame, a power supply unit is further arranged on the component frame, the main loop diodes and the corresponding IGBT units and the corresponding main loop diodes are connected in a conductive manner through a conductive connection structure to form a corresponding branch switch circuit, the conductive connection structure comprises a plurality of laminated busbar arranged below the IGBT valve section and the main loop diode valve section, the main loop diode valve section and the IGBT valve section are provided with conductive connection parts, and each laminated busbar is correspondingly and conductively connected with the conductive connection parts. The laminated busbar is arranged below the main loop diode valve section and the IGBT valve section, so that the influence on the installation clearance between the main loop diode valve section and the IGBT valve section can be avoided, the installation clearance between the two valve sections can be reduced, and the whole branch switch assembly structure is more compact. And the installation space is larger during connection, and the installation is more convenient.
Description
Technical Field
The present utility model relates to a branch switch assembly for a direct current circuit breaker.
Background
The hybrid direct current breaker comprises a main branch, a transfer branch and an energy consumption branch which are connected in parallel, wherein a plurality of switching power modules are respectively connected in series on the main branch and the transfer branch. The topological structure of the switch power module mainly comprises an IGBT sub-module, an IGBT sub-module of an H bridge structure, a sub-module formed by diode bridges and the like. Common circuit topology structure is as the full bridge module that is used for circuit breaker to establish ties in proper order that is disclosed in the chinese patent of patent application publication number CN207304391U, and every full bridge module includes 2 IGBTs, 4 diodes and 1 electric capacity unit, and electric capacity unit includes anti-diode and electric capacity that prevents in series, and corresponding anti-diode and electric capacity are parallelly connected respectively and are set up the resistance. When a plurality of such sub-modules are connected in series to form a high-voltage unit, there are problems of a large number of diodes used and a complex structure, and the cost is high, which makes manufacturing more difficult.
In the chinese patent application with publication number CN108462486a, a high-voltage dc breaker is disclosed, and the dc breaker adopts a novel branch electronic switching circuit, where the branch electronic switching circuit includes a first branch and a second branch that are arranged in parallel, each branch is sequentially and reversely connected with a plurality of diodes in series, each branch forms a corresponding cathode serial point and an anode serial point, a power device unit is disposed between the anode serial point of one branch and the cathode serial point of the other branch, and two ends of the power device unit are further connected in parallel with corresponding capacitor units, the capacitor units include capacitors and anti-reflection diodes that are sequentially connected in series, and the direction of the power device unit is from the anode serial point of one branch to the cathode serial point of the other branch. In the switch structure, the bidirectional conduction characteristic of the electronic switch can be ensured, and the number of used diodes is effectively reduced.
In order to simplify the whole structure, the assembly arrangement of devices such as IGBT, diode and the like in the branch assembly is required to be redesigned so as to meet the requirement of miniaturized design of the branch switch. In the prior art, a branch assembly is assembled by adopting a structure of an ultra-high voltage direct current breaker power electronic branch as disclosed in Chinese patent application publication No. CN207588689U, which designs structures such as IGBT, diode and the like needed in the assembly into a pressure-connection type valve section, then the valve sections are arranged on an assembly frame in a module mode, the assembly frame comprises two support beams at two ends and a plurality of connecting beams arranged in the middle, during the installation, two ends of the corresponding valve sections are correspondingly and fixedly arranged on the two support beams, copper bars are arranged between the valve sections to realize conductive connection of devices between different valve sections, so that the contradiction exists between the convenience of copper bar connection and the volume of the branch assembly, and the copper bars can be firmly connected conveniently if a larger gap is designed between the valve sections, but the whole structure of the branch assembly is larger. If a smaller gap is designed between the valve sections, the whole structural size of the branch assembly can be reduced, but the copper bar connection is inconvenient to realize, and both are difficult to consider.
Disclosure of Invention
The utility model provides a branch switch assembly for a direct current breaker, which has a compact structure and is convenient to connect between valve sections.
In order to achieve the above purpose, the technical scheme of the branch switch assembly for the direct current breaker provided by the utility model is as follows:
the branch switch assembly for the direct current breaker comprises an assembly frame, wherein an IGBT valve section and a main loop diode valve section which are sequentially arranged along the front-back direction and extend along the left-right direction are arranged on the assembly frame, a power supply unit for supplying power to the IGBT valve section is further arranged on the assembly frame, the main loop diode valve section comprises a plurality of main loop diodes which are sequentially pressed, the IGBT valve section comprises a plurality of IGBT units which are sequentially pressed, the main loop diodes and the corresponding IGBT units and the corresponding main loop diodes are electrically connected through an electrically conductive connection structure so as to form a corresponding branch switch circuit, the electrically conductive connection structure comprises a plurality of laminated busbar which are arranged below the IGBT valve section and the main loop diode valve section and are arranged along the left-right direction, corresponding electrically conductive connection parts are respectively arranged at the bottoms of the main loop diode valve section and the IGBT valve section, and the electrically conductive connection parts on the main loop diode valve section and the IGBT valve section are correspondingly electrically connected so as to realize electrically conductive connection between the corresponding IGBT units and the corresponding main loop diodes.
The beneficial effects of the utility model are as follows: according to the branch switch for the direct current breaker, the IGBT valve sections and the main loop diode valve sections are connected in a conductive mode through the laminated busbar, and the laminated busbar is arranged below the main loop diode valve sections and the IGBT valve sections, so that the influence on the installation gap between the main loop diode valve sections and the IGBT valve sections can be avoided, the installation gap between the two valve sections can be reduced to the greatest extent, and the whole branch switch assembly structure is more compact. In addition, when in connection, the installation space is large because the conductive connection is carried out from the lower part, the installation space is not influenced by the installation gap between the main loop diode valve section and the IGBT valve section in the connection process, and the installation is also convenient.
Further, the laminated busbar is provided with an IGBT terminal which is fixedly connected with the conductive connection part on the IGBT valve section in a corresponding conductive manner and a main loop diode terminal which is fixedly connected with the conductive connection part on the main loop diode valve section in a corresponding conductive manner, the IGBT terminal and the main loop diode terminal respectively comprise a positive terminal and a negative terminal, and at least one of the positive terminal and the negative terminal in the IGBT terminal and/or the main loop diode terminal is in a soft connection terminal structure. The flexible connection terminal structure is suitable for the crimping valve section structure, the connection redundancy is large, the crimping precision of the valve sections can be reduced by connecting the valve sections through the flexible connection terminal structure, and the conductive connection performance is ensured.
Further, the IGBT valve section includes an IGBT radiator provided corresponding to the IGBT in the IGBT unit, the main loop diode valve section includes a main loop diode radiator provided corresponding to the main loop diode, the conductive connection portion on the main loop diode valve section is provided on the main loop diode radiator, the conductive connection portion on the IGBT valve section is provided on the IGBT radiator, the IGBT terminal on the laminated busbar is electrically and fixedly connected with the corresponding IGBT radiator, and the main loop diode terminal on the laminated busbar is electrically and fixedly connected with the corresponding main loop diode radiator. The corresponding radiator is utilized to realize conductive connection with the corresponding terminal on the laminated busbar, and the installation and connection are convenient.
Further, the assembly frame is further provided with capacitor units which are arranged at two ends of each IGBT unit in parallel in one-to-one correspondence through the laminated busbar, each capacitor unit comprises an anti-reflection diode and a capacitor which are arranged in series in a conductive mode sequentially, the anti-reflection diodes of all the capacitor units are sequentially pressed in the left-right direction to form an anti-reflection diode valve section, the capacitors of all the capacitor units are sequentially arranged in the left-right direction to be fixedly arranged on the assembly frame to form a capacitor module, and each capacitor is combined into the capacitor module to be installed simply and conveniently, and the modularization degree is high.
Further, the IGBT valve section, the main loop diode valve section, the anti-reflection diode valve section and the capacitor module are sequentially arranged on the assembly frame along the front-back direction, and the capacitor module is arranged at the edge to facilitate installation and replacement due to the fact that the capacitor module is large in size.
Further, the laminated busbar is provided with an anti-reflection diode terminal which is in corresponding conductive connection with the anti-reflection diode and a capacitor terminal which is in conductive connection with a corresponding capacitor, the laminated busbar is L-shaped and is provided with a transverse arm part and a vertical arm part, the transverse arm part of the laminated busbar is positioned below the anti-reflection diode valve section, the main loop diode valve section and the IGBT valve section, the vertical arm part is positioned between the anti-reflection diode valve section and the capacitor module, the IGBT terminal, the main loop diode terminal and the anti-reflection diode terminal are arranged on the transverse arm part, and the capacitor terminal is arranged on the vertical arm part.
Further, anti-diode radiators are respectively arranged on the left side and the right side of each anti-diode in the anti-diode valve section, diode resistors which are arranged in parallel with the anti-diodes are arranged between the anti-diode radiators on the two sides of any anti-diode, and the diode resistors are connected between the radiators in a simpler mode.
Further, each capacitor is connected in parallel with a capacitor resistor.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a branch switch assembly for a dc breaker according to the present utility model;
FIG. 2 is a top view of the bypass switch assembly of FIG. 1;
FIG. 3 is a bottom view of the bypass switch assembly of FIG. 1;
FIG. 4 is a schematic view of the stacked busbar of FIG. 3;
FIG. 5 is a schematic view of the structure of the component frame of FIG. 1;
FIG. 6 is a schematic diagram of a bypass switch circuit of the bypass switch assembly of FIG. 1;
reference numerals illustrate: 1-an assembly frame; 11-mounting a beam; 12-connecting beams; 2-a power magnetic ring unit; 3-IGBT valve sections; 31-1 drag 2 drive plate; 4-a main loop diode valve section; a 5-anti-reverse diode valve section; 51-diode resistance; a 6-capacitance module; 61-capacitance resistance; 7-laminating a busbar; 71-flexible connection structure; 72-terminal hole structure; 8-a central control unit.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
Specific embodiments of the branch switch assembly for a direct current circuit breaker of the present utility model:
for ease of understanding, the circuit principles corresponding to the bypass switch assemblies shown in fig. 1-3 will be described. The circuit principle is as shown in fig. 6, the branch switch circuit corresponding to the branch switch assembly comprises two branches which are arranged in parallel, each branch is sequentially and reversely connected with a plurality of main loop diodes in series, a corresponding cathode series point and an anode series point are formed on each branch, an IGBT unit is arranged between the anode series point of one branch and the cathode series point of the other branch, two ends of the IGBT unit are also connected with corresponding capacitor units in parallel, each capacitor unit respectively comprises a capacitor and an anti-reflection diode which are sequentially connected in series, and the direction of the IGBT unit is from the anode series point of one branch to the cathode series point of the other branch. The circuit structure of the electronic switch is the same as that of the electronic switch disclosed in the Chinese patent application with publication number CN108462486A, and is not described in detail herein.
In terms of a circuit, the branch switch structure not only can ensure the bidirectional conduction characteristic of the electronic switch, but also can effectively reduce the number of diodes used and can effectively reduce the cost of the whole branch switch assembly.
The specific structure of the bypass switch assembly is described in detail below:
as shown in fig. 1, 2 and 3, the branch switch assembly integrally comprises an assembly frame 1 at the bottom, and a power supply unit, a central control unit 8, an IGBT valve section 3, a main loop diode valve section 4, an anti-reflection diode valve section 5 and a capacitor module 6 are sequentially arranged on the assembly frame 1 from front to back.
As shown in fig. 1 to 3 and 5, the assembly frame 1 includes mounting beams 11 extending in the front-rear direction on both sides of the branch switch assembly and connecting beams 12 located in the middle of the two mounting beams 11, the mounting beams 11 are aluminum channel steel, the connecting beams 12 are insulating beams, and four of the four are provided, namely, a first connecting beam, a second connecting beam, a third connecting beam and a fourth connecting beam. The four connecting beams 12 are sequentially arranged in the mounting beam grooves at intervals from front to back, and are fixed with the mounting beam 11 at the end parts of the connecting beams 12 through bolts. The IGBT valve section 3, the main loop diode valve section 4 and the anti-reflection diode valve section 5 are correspondingly arranged on the mounting beam 11, and the power supply unit, the central control unit 8 and the capacitor unit are arranged on the connecting beam 12. The capacitor unit in this embodiment is mainly composed of a capacitor and an anti-reflection diode connected in series. In fact, the mounting beams 11 at the two ends, which are mainly shown in fig. 6, do not show all the connecting beams.
The power supply unit in this embodiment is a power supply magnetic ring unit 2, and a plurality of magnetic rings are sequentially arranged on the first connecting beam from left to right to form the power supply magnetic ring unit 2, and the power supply magnetic ring unit 2 is arranged at the forefront of the branch switch assembly, so that energy is conveniently taken. The central control unit 8 is arranged at the rear of the power magnetic ring unit 2, and the central control elements are sequentially connected between the first connecting beam and the second connecting beam to form the central control unit 8.
The IGBT valve section 3 in the embodiment is formed by crimping a plurality of IGBTs and a water-cooling radiator, and comprises a middle frame extending along the left-right direction and two mounting end plates fixedly arranged at two ends of the middle frame, wherein the two mounting end plates of the valve section are fixedly connected through four insulating pull rods, and the four insulating pull rods form the middle frame. The two mounting end plates are provided with clamping devices which are used in a matched mode to clamp and position the IGBT and the water-cooling radiator in the left-right direction, one of the clamping devices is a disc spring jacking device for applying acting force to an external loading mechanism, the other clamping device is a rigid jacking device, the rigid jacking device comprises ball stud bolts arranged in the left-right direction, and the surface pressure of the IGBT can be adjusted by adjusting the ball stud bolts. The IGBT and the plurality of water-cooling radiators are clamped between the two mounting end plates, and the water-cooling radiators are arranged at intervals with the IGBT, so that each IGBT can be ensured to sufficiently radiate through the radiator. The IGBT in the valve section is electrically connected to the corresponding main circuit diode, anti-reflection diode, and other elements through a water-cooled radiator that is adjacent to the IGBT and is electrically connected, and in this embodiment, an electrically conductive connection portion on the IGBT valve section 3 that is electrically connected to other valve sections is disposed at the bottom of the water-cooled radiator. In this embodiment, two parallel IGBTs form the IGBT unit, however, in other embodiments, the IGBT unit may be a single IGBT or three or more IGBTs connected in parallel.
The anti-reflection diode valve section 5 and the main loop diode valve section 4 are similar to the IGBT valve section 3 in structure, and the difference is only that the elements pressed in the valve section are different, and the IGBT valve section 3 is pressed with an IGBT and a water-cooling radiator; the main loop diode valve section 4 is provided with a main loop diode and a water-cooling radiator in a pressing mode; the anti-reflection diode valve section 5 is provided with an anti-reflection diode and a water-cooling radiator in a pressing mode. The anti-reverse diode valve section 5 is characterized in that a diode resistor 51 which is arranged in parallel with the anti-reverse diode is further arranged between the anti-reverse diode radiators on two sides of any anti-reverse diode, and a 1-to-2 driving plate 31 is further arranged above the IGBT valve section 3. The water-cooling radiator in the IGBT valve section 3 is an IGBT radiator; the water-cooling radiator in the main loop diode valve section 4 is a main loop diode radiator; the water-cooled radiator in the anti-reflection diode valve section 5 is an anti-reflection diode radiator.
The end of the branch switch assembly is provided with a capacitor module 6, the capacitor module 6 is fixedly connected to the third connecting beam 12 and the fourth connecting beam 12, and the capacitor module 6 is arranged at the end of the branch switch assembly due to the large capacitor volume so as to be convenient to install and replace. And because the bottom of the capacitor needs to be supported and fixed with the connecting beam 12, the capacitor terminals on the capacitor are arranged towards the front of the branch switch assembly, and the capacitor resistors 61 are arranged at the two ends of the capacitor.
After each valve section is installed on the component frame 1, a corresponding conductive connection structure is required to be adopted so as to enable conductive connection between the main loop diodes and between the corresponding IGBT units and the corresponding main loop diodes, and further a corresponding branch switch circuit is formed. In this embodiment, the capacitor units are arranged in parallel at two ends of each IGBT unit in a one-to-one correspondence, and therefore, the anti-reflection diode connection terminal and the capacitor connection terminal are further provided on the laminated busbar 7.
Each of the laminated busbar is used for realizing conductive connection between the IGBT cells on the IGBT valve section and the corresponding main loop diodes on the main loop diode valve section, and in fact, the corresponding conductive connection structure for realizing conductive connection between the main loop diodes and between the corresponding IGBT cells and the corresponding main loop diodes not only comprises the laminated busbar, but also comprises corresponding heat sinks in each valve section for realizing conductive connection between adjacent devices such as IGBTs and main loop diodes.
Specifically, in this embodiment, the laminated busbar 7 is integrally L-shaped and includes a cross arm portion and a vertical wall portion, where the cross arm portion is provided with an IGBT connection terminal, a main loop diode connection terminal, and an anti-reflection diode connection terminal for conducting connection with a conducting connection portion of an element on a corresponding valve section, so that the cross arm portion is disposed at the bottom of the branch switch assembly. The vertical wall portion extends from the bottom up between the capacitive module 6 and the anti-reflection diode valve section 5 and is electrically conductive to the capacitance. In view of the convenience of connection, the negative electrode terminal on the laminated busbar 7 is a terminal hole structure 72, and the positive electrode terminal is a terminal row structure, wherein the positive electrode terminals in the IGBT connection terminal and the main loop diode connection terminal are both soft connection structures 71. In other embodiments, after the capacitor module is fixed as a whole by the frame formed by the insulating beams, the capacitor terminals are fixed on the assembly frame downward, and the laminated busbar can be integrally designed as a linear type. Because the mounting beam is the groove type, each valve section sets up at the mounting beam top, has consequently formed certain installation space in the below, is convenient for install the female row of stromatolite.
The flexible connection structure 71 is suitable for a pressure welding valve section structure, the connection redundancy is large, the pressure welding precision of the valve sections can be reduced by connecting the valve sections through the flexible connection structure 71, and the conductive connection performance is ensured. And the laminated busbar 7 is used on the branch switch assembly, so that the gap between two layers of busbar is reduced to the greatest extent under the condition that the withstand voltage requirement of the two layers of busbar is met, and the stray inductance is reduced. In other embodiments, the specific structure of the connection terminal is freely designed according to the need, for example, only the IGTB connection terminal or only the positive terminal of the main loop diode connection terminal is designed as a soft connection structure.
According to the branch switch for the direct current breaker, the IGBT valve sections 3 and the main loop diode valve sections 4 are connected in a conductive mode through the laminated busbar 7, and the laminated busbar 7 is arranged below the main loop diode valve sections 4 and the IGBT valve sections 3, so that the influence on the installation gap between the main loop diode valve sections 4 and the IGBT valve sections 3 can be avoided, the installation gap between the two valve sections can be reduced to the greatest extent, and the whole branch switch assembly is more compact in structure. In addition, when in connection, the installation space is large because the conductive connection is carried out from the lower part, the installation space is not influenced by the installation gap between the main loop diode valve section 4 and the IGBT valve section 3 in the connection process, and the installation is convenient. In addition, the branch switch for the direct current breaker adopts a modularized design, each element is correspondingly designed into a module, and then the module is integrally arranged on the assembly frame 1, so that the installation and connection are simple and orderly, and the error is not easy to occur. The capacitor module 6 and the power supply unit are arranged at two sides of the assembly, and valve sections easy to replace are arranged in the middle, so that replacement and disassembly of all parts of the whole branch switch are quite simple and convenient, and field maintenance is quite convenient.
In this embodiment, the entire branch switch assembly corresponds to the circuit structure shown in fig. 6, and the conductive connection of devices between the corresponding valve segments is implemented by using the laminated busbar disposed below the IGBT valve segments and the main loop diode valve segments. In other embodiments, the manner of arranging the laminated busbar under the IGBT valve section and the main loop diode valve section can also be applied to branch switch assemblies of other circuit topologies, such as the serial full bridge modules disclosed in the chinese patent with publication number CN207304391U, which are not limited to the circuit topology shown in fig. 6.
In this embodiment, corresponding capacitor units are connected in parallel to two sides of the IGBT unit, and a capacitor resistor is provided corresponding to the capacitor in the capacitor unit, and an anti-diode resistor is provided corresponding to the anti-diode. Of course, in other embodiments, bypass switch structures arranged in parallel on both sides of the IGBT cell may be added, and the capacitor cell may be omitted.
Claims (6)
1. The utility model provides a branch switch subassembly for direct current breaker, includes the subassembly frame, is equipped with on the subassembly frame along the fore-and-aft direction arrange in proper order and all along the IGBT valve section and the main return circuit diode valve section of controlling the orientation extension, still is equipped with the power supply unit to IGBT valve section power supply on the subassembly frame, main return circuit diode valve section includes a plurality of main return circuit diodes of press-fit in turn, and IGBT valve section includes a plurality of IGBT units of press-fit in turn, and through conductive connection structure conductive connection in order to form corresponding branch switch circuit between main return circuit diode and between corresponding IGBT unit and the corresponding main return circuit diode, its characterized in that: the conductive connection structure comprises a plurality of laminated busbar arranged below the IGBT valve section and the main loop diode valve section and along the left-right direction, wherein corresponding conductive connection parts are respectively arranged at the bottoms of the main loop diode valve section and the IGBT valve section, which correspond to the laminated busbar, and each laminated busbar is correspondingly and conductively connected with the conductive connection parts of the main loop diode valve section and the IGBT valve section so as to realize conductive connection between corresponding IGBT units and corresponding main loop diodes; the laminated busbar is provided with an IGBT terminal which is correspondingly and fixedly connected with the conductive connecting part on the IGBT valve section and a main loop diode terminal which is correspondingly and fixedly connected with the conductive connecting part on the main loop diode valve section; the assembly frame is also provided with capacitor units which are arranged at two ends of each IGBT unit in parallel and are in one-to-one correspondence through the laminated busbar, each capacitor unit respectively comprises an anti-reflection diode and a capacitor which are sequentially arranged in a conductive series manner, the anti-reflection diodes of all the capacitor units are sequentially pressed in the left-right direction to form an anti-reflection diode valve section, and the capacitors of all the capacitor units are sequentially arranged in the left-right direction and fixedly arranged on the assembly frame to form a capacitor module; the anti-reflection diode is characterized in that an anti-reflection diode terminal which is in corresponding conductive connection with the anti-reflection diode and a capacitor terminal which is in conductive connection with a corresponding capacitor are arranged on the laminated busbar, the laminated busbar is L-shaped and provided with a cross arm part and a vertical arm part, the cross arm part of the laminated busbar is positioned below the anti-reflection diode valve section, the main loop diode valve section and the IGBT valve section, the vertical arm part is positioned between the anti-reflection diode valve section and the capacitor module, the IGBT terminal, the main loop diode terminal and the anti-reflection diode terminal are arranged on the cross arm part, and the capacitor terminal is arranged on the vertical arm part.
2. The branch switch assembly for a direct current breaker according to claim 1, wherein: the IGBT terminal and the main loop diode terminal respectively comprise a positive terminal and a negative terminal, and at least one of the positive terminal and the negative terminal in the IGBT terminal and/or the main loop diode terminal is of a soft connection terminal structure.
3. The branch switch assembly for a direct current breaker according to claim 2, wherein: the IGBT valve section comprises an IGBT radiator corresponding to the IGBT in the IGBT unit, the main loop diode valve section comprises a main loop diode radiator corresponding to the main loop diode, the conductive connection part on the main loop diode valve section is arranged on the main loop diode radiator, the conductive connection part on the IGBT valve section is arranged on the IGBT radiator, the IGBT terminal on the laminated busbar is fixedly connected with the corresponding IGBT radiator in a conductive way, and the main loop diode terminal on the laminated busbar is fixedly connected with the corresponding main loop diode radiator in a conductive way.
4. A branch switch assembly for a direct current breaker according to claim 1 or 2 or 3, characterized in that: the IGBT valve section, the main loop diode valve section, the anti-reflection diode valve section and the capacitor module are sequentially arranged on the assembly frame along the front-back direction.
5. A branch switch assembly for a direct current breaker according to claim 1 or 2 or 3, characterized in that: the left side and the right side of each anti-reflection diode corresponding to each anti-reflection diode in the anti-reflection diode valve section are respectively provided with an anti-reflection diode radiator, and a diode resistor which is arranged in parallel with the anti-reflection diode is arranged between the anti-reflection diode radiators on the two sides of any anti-reflection diode.
6. A branch switch assembly for a direct current breaker according to claim 1 or 2 or 3, characterized in that: the capacitors are respectively connected with a capacitor resistor in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502543.6A CN112073043B (en) | 2019-06-11 | 2019-06-11 | Branch switch assembly for direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502543.6A CN112073043B (en) | 2019-06-11 | 2019-06-11 | Branch switch assembly for direct current breaker |
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| Publication Number | Publication Date |
|---|---|
| CN112073043A CN112073043A (en) | 2020-12-11 |
| CN112073043B true CN112073043B (en) | 2023-08-15 |
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