CN116526418A - Frame type solid-state direct current breaker - Google Patents

Frame type solid-state direct current breaker Download PDF

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Publication number
CN116526418A
CN116526418A CN202310324794.6A CN202310324794A CN116526418A CN 116526418 A CN116526418 A CN 116526418A CN 202310324794 A CN202310324794 A CN 202310324794A CN 116526418 A CN116526418 A CN 116526418A
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CN
China
Prior art keywords
side plate
plate
direct current
primary chamber
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310324794.6A
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Chinese (zh)
Inventor
钟建英
邓渊
余占清
范乃元
曾嵘
屈鲁
严鑫
甘之正
张公一
冯健
张龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Pinggao Group Co Ltd
Original Assignee
Tsinghua University
Pinggao Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University, Pinggao Group Co Ltd filed Critical Tsinghua University
Priority to CN202310324794.6A priority Critical patent/CN116526418A/en
Publication of CN116526418A publication Critical patent/CN116526418A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency 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
    • H02H7/22—Emergency 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 for distribution gear, e.g. bus-bar systems; for switching devices
    • 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 invention belongs to the technical field of direct current transmission, and discloses a frame type solid state direct current breaker which comprises a primary chamber, a secondary chamber, a solid state switch, a fan assembly, a wire inlet and outlet sleeve and a busbar; the primary chamber and the secondary chamber are respectively provided with a containing cavity, and the secondary chamber is detachably connected with the primary chamber; the solid-state switch is arranged in the primary chamber, a first vent hole matched with an air inlet of the fan assembly is formed in one side of the primary chamber, the fan assembly is arranged outside the first vent hole and connected with the primary chamber, and a plurality of second vent holes are formed in one side of the primary chamber opposite to the first vent hole; the two wire inlet and outlet sleeves are matched with the busbar, the wire inlet and outlet sleeves are arranged on the primary chamber, and one end of each busbar penetrates through the wire inlet and outlet sleeve and is connected with the solid switch. The frame type solid-state direct current breaker has the advantages of high breaking capacity, simple structure, easy operation, strong adaptability, small volume, light weight and low cost.

Description

Frame type solid-state direct current breaker
Technical Field
The invention belongs to the technical field of direct current transmission, and particularly relates to a frame type solid-state direct current breaker.
Background
In the field of power transmission, in order to adapt to a new energy pattern, a conventional direct current and flexible direct current based multi-terminal direct current power transmission system and a direct current power grid technology become future development trend, if the direct current power transmission lines are interconnected on a direct current side to form a direct current power grid, the problems of active fluctuation and the like caused by new energy grid connection can be effectively solved, and the method has great advantages in the fields of future urban intelligent power distribution networks, micro-networks and the like, and has great significance for construction and development of future power grids in China. In the field of power distribution, a direct current power distribution network has a huge development prospect under the promotion of modern power electronic technology and distributed power sources. On one hand, common distributed power supplies can generate direct current or change the direct current into direct current after rectification, and if the power supplies are connected into a direct current distribution network, a current conversion link is greatly saved; on the other hand, at present, a plurality of loads are powered by direct current, and the loads can be directly powered by the direct current distribution network without a rectifying link, so that the cost and the loss are reduced. The direct current distribution network has the advantages of low line cost, low transmission loss and high power supply reliability, and achieves a plurality of technical and economic advantages compared with the alternating current distribution network. The DC circuit breaker is used as DC protection equipment and has great significance for ensuring the safe operation of the DC distribution network.
The traditional frame type breaker is used in an alternating current distribution network, can communicate, bear and break alternating current under the condition of normal circuit, is used for distributing electric energy, protecting overload, undervoltage and short circuit of a circuit and power supply equipment, can also be used for infrequent circuit conversion and infrequent motor starting, and is obviously not applicable to direct current distribution network circuits.
Disclosure of Invention
Aiming at the problems, the invention provides a frame type solid-state direct current breaker, which adopts the following technical scheme:
a frame type solid-state direct current breaker comprises a primary chamber, a secondary chamber, a solid-state switch, a fan assembly, an inlet and outlet wire sleeve and a busbar; wherein, the primary chamber and the secondary chamber are provided with accommodating cavities, and the secondary chamber is detachably connected with the primary chamber; the solid-state switch is arranged in the primary chamber, a first ventilation hole matched with an air inlet of the fan assembly is formed in one side of the primary chamber, the fan assembly is arranged outside the first ventilation hole and connected with the primary chamber, and a plurality of second ventilation holes are formed in one side, opposite to the first ventilation hole, of the primary chamber; the inlet and outlet wire sleeves are arranged on the primary chamber in a matched mode with the busbar, and one end of each busbar penetrates through the inlet and outlet wire sleeve to be connected with the solid-state switch.
Further, a secondary power supply loop, a control loop and a state detection device are arranged in the secondary chamber.
Further, the primary chamber comprises a bottom plate, a top plate, a first side plate, a second side plate, a third side plate and a fourth side plate;
the first side plate, the second side plate, the third side plate and the fourth side plate form a box body with a containing cavity, the first side plate, the second side plate, the third side plate and the bottom of the fourth side plate are all connected with the bottom plate, the tops of the second side plate, the third side plate and the fourth side plate are all connected with the top plate, the opposite tops of the second side plate and the fourth side plate are all provided with L-shaped notches, the upper end face of the first side plate is flush with the bottom of the L-shaped notches, and one side end face of the top plate, far away from the second side plate, is flush with the top of the L-shaped notches.
Further, the bottom of the secondary chamber is abutted with the second side plate and the L-shaped notch, the top of the secondary chamber is flush with the top plate, the first side surface of the secondary chamber is flush with the first side plate, the second side surface of the secondary chamber is flush with the second side plate, and the fourth side surface of the secondary chamber is flush with the fourth side plate; the bottom of the secondary chamber is detachably connected with the first side plate, and the top of the secondary chamber is detachably connected with the top plate.
Further, grooves are formed in the first side plate and the third side plate.
Further, the frame type solid-state direct current breaker further comprises a control screen, the control screen is arranged on the fourth side plate, and an observation window is further arranged on one side of the control screen on the fourth side plate.
Further, the solid state switch comprises a fixed frame, a turn-off thyristor device, a heat dissipation assembly and a lightning arrester;
the plurality of the turn-off thyristor devices are arranged in the fixed frame in a stacked mode, two sides of each turn-off thyristor device are in contact with the heat dissipation assembly, the plurality of lightning arresters are arranged, one end of each lightning arrester is connected with the turn-off thyristor device, and the other end of each lightning arrester is connected with one busbar.
Further, the fixed frame comprises a press-fit assembly, a first pressing plate, a second pressing plate, a first supporting plate and a second supporting plate;
the first support plate and the second support plate are oppositely arranged, and one end of the first support plate is detachably connected with the second support plate through the first pressing plate; the other end of the first supporting plate is detachably connected with the second supporting plate through the second pressing plate; the press-fit assembly is arranged on the first pressing plate and is used for press-fitting the plurality of turn-off thyristor devices and the plurality of heat dissipation assemblies which are arranged in a stacked mode between the first pressing plate and the second pressing plate.
Further, the heat dissipation assembly comprises a heat dissipation pipe and a heat dissipation fin;
the radiating fins are arranged in a plurality of ways, 2n radiating pipes are arranged, n is a positive integer, each radiating fin is provided with 2n first through holes matched with the radiating pipes, one ends of the 2n radiating pipes are in contact with the turn-off thyristor device, and the other ends of the 2n radiating pipes penetrate through the first through holes of the radiating fins and are connected with the radiating fins.
Further, the polylith fin sets up fixed frame's upper portion and equidistant setting, 2n cooling tubes in every cooling module divide two sets of parallel arrangement, and the equidistant setting of n cooling tubes in every cooling tube of group, every still be provided with fixed screw hole on the fin of the upper strata in the cooling module, be provided with square hole and second through-hole on the roof, the second through-hole with fixed screw hole matches the setting, square hole quantity with cooling module quantity one-to-one sets up, every cooling module's cooling tube upper end passes the square hole.
Further, the first ventilation hole and the second ventilation hole are respectively positioned at two sides of the plurality of radiating fins in the radiating assembly.
Further, the turn-off thyristor device is a reverse resistance type IGCT.
The invention has the beneficial effects that: the frame type solid-state direct current breaker has the advantages of high breaking capacity, simple structure, easy operation, strong adaptability, small volume, light weight and low cost.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows an isometric view of a frame-type solid state dc breaker according to an embodiment of the invention;
fig. 2 shows a schematic front view of a frame-type solid state dc breaker according to an embodiment of the invention;
FIG. 3 illustrates a schematic top view of a frame-type solid state DC circuit breaker in accordance with an embodiment of the invention;
fig. 4 shows a schematic left view of a frame-type solid state dc breaker according to an embodiment of the invention;
fig. 5 shows an isometric view of a solid state switch according to an embodiment of the invention.
In the figure: 1. a primary chamber; 2. a secondary chamber; 3. a solid state switch; 4. a fan assembly; 5. a wire inlet and outlet sleeve; 6. a busbar; 7. a second vent hole; 8. an external power supply introduction terminal; 9. a control screen; 10. an observation window; 11. a bottom plate; 12. a top plate; 13. a first side plate; 14. a second side plate; 15. a fourth side plate; 16. an L-shaped notch; 31. a fixed frame; 32. a turn-off thyristor device; 33. a heat dissipation assembly; 34. a lightning arrester; 121. square holes; 122. a second through hole; 131. a groove; 311. press-fitting the assembly; 312. a first platen; 313. a first support plate; 314. a second support plate; 315. a through groove; 331. a heat radiating pipe; 332. a heat radiation fin; 333. and fixing the threaded holes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings.
The embodiment of the invention provides a frame type direct current breaker which has the advantages of high breaking capacity, simple structure, easy operation, strong adaptability, small volume, light weight, low cost and convenient operation and maintenance and is used for a direct current distribution network.
As shown in fig. 1, a frame type solid state dc breaker includes a primary chamber 1, a secondary chamber 2, a solid state switch 3, a fan assembly 4, an in-out bushing 5, and a busbar 6.
The primary chamber 1 and the secondary chamber 2 may be metal plates or a combination of metal plates and insulating plates. The primary chamber 1 and the secondary chamber 2 are provided with accommodating cavities, and the secondary chamber 2 is detachably connected with the primary chamber 1.
The solid-state switch 3 is arranged in the primary chamber 1, and a secondary power supply loop, a control loop, a state detection device and the like are arranged in the secondary chamber 2. In this embodiment, the secondary chamber 2 and the primary chamber 1 are designed in a split manner, and the secondary chamber 2 is used as an independent secondary power supply control chamber, so that the installation and maintenance are convenient.
A first ventilation hole matched with an air inlet of the fan assembly 4 is formed in one side of the upper part of the primary chamber 1, the fan assembly 4 is arranged outside the first ventilation hole and detachably connected with the primary chamber 1, the using number of the fan assembly 4 is selected by referring to heat dissipation power, for example, 2 fan assemblies can be arranged; as shown in fig. 4, the primary chamber 1 is provided with a plurality of second ventilation holes 7 at a side opposite to the first ventilation holes, and when the fan assembly 4 works, air passes through the first ventilation holes, the solid state switch 3 and the second ventilation holes 7, and the air is used as a medium to cool the solid state switch 3, and the fan assembly 4 can be used for exhausting or exhausting air.
For example, the second ventilation holes 7 on the primary chamber 1 are waist-shaped, and two groups of second ventilation holes 7 are provided, and each group of second ventilation holes 7 includes a plurality of second ventilation holes 7 arranged equidistantly.
Two wire inlet and outlet sleeves 5 are matched with the busbar 6, the wire inlet and outlet sleeves 5 are arranged on the primary chamber 1, for example, the two wire inlet and outlet sleeves 5 are arranged on the same side of the primary chamber 1 and are positioned below the fan assembly 4; one end of each busbar 6 passes through the wire inlet and outlet sleeve 5 to be connected with the solid-state switch 3, the connection between the wire inlet and outlet and the solid-state switch 3 is realized through the busbar 6, and the wire inlet and outlet sleeve 5 ensures the insulation performance and the reliable temperature of the busbar 6.
In one embodiment, the primary chamber 1 and the secondary chamber 2 form a cubic box, as shown in fig. 1, 2, 3 and 4, the primary chamber 1 comprises a bottom plate 11, a top plate 12, a first side plate 13, a second side plate 14, a third side plate and a fourth side plate 15, the first side plate 13, the second side plate 14, the third side plate and the fourth side plate 15 form the box with square accommodating cavities, bottoms of the first side plate 13, the second side plate 14, the third side plate and the fourth side plate 15 are connected with the bottom plate 11, tops of the second side plate 14, the third side plate and the fourth side plate 15 are connected with the top plate 12, as shown in fig. 1, tops of the second side plate 14 and the fourth side plate 15 which are opposite are provided with L-shaped notches 16, an upper end face of the first side plate 13 is flush with the bottom of the L-shaped notches 16, and an end face of the top plate 12 away from the second side plate 14 is flush with the top of the L-shaped notches 16.
The bottom of the secondary chamber 2 is abutted with L-shaped notches 16 of the second side plate 14 and the fourth side plate 15, the top of the secondary chamber 2 is flush with the top plate 12, the first side surface of the secondary chamber 2 is flush with the first side plate 13 of the primary chamber 1, the second side surface of the secondary chamber 2 is flush with the second side plate 14 of the primary chamber 1, and the fourth side surface of the secondary chamber 2 is flush with the fourth side plate 15 of the primary chamber 1; the bottom of the secondary chamber 2 is detachably connected with the first side plate 13 through bolts, and the top of the secondary chamber 2 is detachably connected with the top plate 12 through bolts.
In one embodiment, as shown in fig. 1, the frame type solid state dc breaker further includes an external power supply introduction terminal 8, the external power supply introduction terminal 8 is disposed on the first side plate 13 of the primary chamber 1, grooves 131 are disposed on both the first side plate 13 and the third side plate of the primary chamber 1, the grooves 131 facilitate the extraction movement, and for example, 2 grooves 131 may be disposed on each side plate.
In one embodiment, as shown in fig. 4, the frame-type solid-state dc breaker further includes a control panel 9, where the control panel 9 is disposed on a fourth side panel 15 of the primary chamber 1, and the fourth side panel 15 is further provided with an observation window 10 on one side of the control panel 9, so as to facilitate observation of the device status indicator lamp of the solid-state switch 3.
In one embodiment, as shown in fig. 5, the solid state switch 3 includes a fixed frame 31, a turn-off thyristor device 32, a heat sink assembly 33, and a lightning arrester 34.
The fixed frame 31 is square, the plurality of turn-off thyristor devices 32 are stacked in the fixed frame 31, two sides of each turn-off thyristor device 32 are in contact with the heat dissipation assembly 33, two lightning arresters 34 are arranged, one end of each lightning arrestor 34 is connected with the turn-off thyristor device 32, the other end of each lightning arrestor 34 is connected with one busbar 6, and the lightning arrestor 34 is used for overvoltage protection of the turn-off thyristor device 32.
For example, four turn-off thyristor devices 32 are provided in a stacked manner in the fixed frame 31, five heat dissipation members 33 are provided, and five heat dissipation members 33 are provided between adjacent turn-off thyristor devices 32, between the first turn-off thyristor device 32 and the first end of the fixed frame 31, and between the fourth turn-off thyristor device 32 and the second end of the fixed frame 31, respectively.
Specifically, the fixing frame 31 includes a press-fit assembly 311, a first pressing plate 312, a second pressing plate, a first supporting plate 313 and a second supporting plate 314, where the first supporting plate 313 and the second supporting plate 314 are oppositely disposed, one end of the first supporting plate 313 is detachably connected with the second supporting plate 314 through the first pressing plate 312, for example, threaded blind holes are formed on two sides of the first pressing plate 312 and two sides of the second pressing plate, and the first supporting plate 313 and the second supporting plate 314 are connected with nut blind holes on the first pressing plate 312 and the second pressing plate through bolts, so that detachable connection is achieved.
The other end of the first support plate 313 is detachably connected to the second support plate 314 by a second pressing plate. The press-fitting assembly 311 is disposed on the first press plate 312, and the press-fitting assembly 311 is used for press-fitting the plurality of turn-off thyristor devices 32 and the plurality of heat dissipation assemblies 33, which are disposed in a stacked manner, between the first press plate 312 and the second press plate.
For example, a round hole is formed in the middle of the first press, the press-fit assembly 311 comprises a movable block, a butterfly spring and a top bolt, the movable block is cylindrical, a step surface is arranged at the lower end of the movable block, the upper end of the movable block is in sliding connection with the round hole of the first press plate 312, the butterfly spring is sleeved on the movable block, and the butterfly spring is arranged between the first press plate 312 and the step surface of the movable block; the middle of the movable block is provided with a threaded hole, the top bolt is provided with external threads, and the top bolt is connected with the movable block through threads.
In this embodiment, the pressures of the belleville springs can be respectively corrected according to the requirements of the devices, and the belleville springs are pressed by rotating the top bolts to generate pressure, so that the plurality of turn-off thyristor devices 32 are pressed together. The plug is connected to the movable block through threads, and when the turn-off thyristor device 32 needs to be replaced, the integral pressure of the module can be removed by adjusting the position of the plug, so that replacement and maintenance can be performed. Upon reinstallation, the turn-off thyristor device 32 can be press-fitted as long as the screw threads are tightened.
For example, the turn-off thyristor device 32 may employ a reverse-resistance IGCT (Intergrated GateCommutated Thyristors, integrated gate commutated thyristor).
Further, through grooves 315 are formed in the first support plate 313 and the second support plate 314, and one ends of the two copper bars penetrate through the through grooves 315 of the first support plate 313 and are connected with the turn-off thyristor device 32.
Specifically, the heat dissipation assembly 33 includes heat dissipation tubes 331 and heat dissipation fins 332, the heat dissipation fins 332 are provided with a plurality of heat dissipation tubes 331, 2n heat dissipation tubes 331 are provided, n is a positive integer, each heat dissipation fin 332 is provided with 2n first through holes matched with the heat dissipation tubes 331, one ends of the 2n heat dissipation tubes 331 are in contact with the turn-off thyristor device 32, and the other ends of the 2n heat dissipation tubes 331 penetrate through the first through holes of the plurality of heat dissipation fins 332 and are connected with the plurality of heat dissipation fins 332.
For example, the heat dissipation tube 331 is a gravity heat pipe, the heat dissipation tube 331 is connected with the plurality of heat dissipation fins 332, the heat dissipation area is enlarged, the primary chamber 1 is replaced with external air by the gravity heat pipe and forced air cooling heat dissipation mode, the heat dissipation efficiency is improved, and the service life of the device is prolonged.
In one embodiment, the plurality of heat dissipating fins 332 are disposed at the upper portion of the fixed frame 31 and are disposed at equal intervals, the 2n heat dissipating tubes 331 in each heat dissipating component 33 are disposed in two groups in parallel, the n heat dissipating tubes 331 in each group of heat dissipating tubes 331 are disposed at equal intervals, the heat dissipating fins 332 on the uppermost layer in each heat dissipating component 33 are further provided with two fixing threaded holes 333, for example, the two fixing threaded holes 333 may be disposed at two sides of the heat dissipating fins 332 on the uppermost layer, the two fixing threaded holes 333 are respectively disposed at two sides of the heat dissipating fins 332 on the uppermost layer, as shown in fig. 3, the top plate 12 of the primary chamber 1 is provided with square holes 121 and second through holes 122, the second through holes 122 are disposed in a matching manner with the fixing threaded holes 333, the number of square holes 121 is set in one-to-one correspondence with the number of the heat dissipating components 33, the upper ends of the heat dissipating tubes 331 of each heat dissipating component 33 pass through the square holes 121, pass through the second through holes 122 to be connected with the fixing threaded holes 333 on the heat dissipating fins on the uppermost layer, thereby fixing the upper portion of the heat dissipating component 33 is fixed, and the heat dissipating components 12 is convenient to be replaced, and the square holes 121 on the top plate 12 are also more convenient.
Further, the first ventilation holes and the second ventilation holes 7 are respectively located at two sides of the plurality of radiating fins 332 in the radiating component 33, specifically, the first ventilation holes are disposed at an upper portion of the second side plate 14 of the primary chamber 1, the two wire inlet and outlet bushings 5 are disposed at a lower portion of the second side plate 14 of the primary chamber 1, and the plurality of second ventilation holes 7 are disposed at an upper portion of the fourth side plate 15.
In this embodiment, the fan assembly 4 and the vent holes are installed at appropriate positions, so that the heat dissipation efficiency is further improved.
The frame type solid-state direct current breaker has high breaking capacity, and the solid-state switch 3 adopts a frame type structure, so that the maintenance is convenient, the cost is low, and the weight is light.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. The frame type solid-state direct current breaker is characterized by comprising a primary chamber (1), a secondary chamber (2), a solid-state switch (3), a fan assembly (4), an inlet and outlet wire sleeve (5) and a busbar (6);
wherein, the primary chamber (1) and the secondary chamber (2) are provided with accommodating cavities, and the secondary chamber (2) is detachably connected with the primary chamber (1); the solid-state switch (3) is arranged in the primary chamber (1), a first ventilation hole matched with an air inlet of the fan assembly (4) is formed in one side of the primary chamber (1), the fan assembly (4) is arranged outside the first ventilation hole and is connected with the primary chamber (1), and a plurality of second ventilation holes (7) are formed in one side, opposite to the first ventilation hole, of the primary chamber (1); the two wire inlet and outlet sleeves (5) are matched with the busbar (6), the wire inlet and outlet sleeves (5) are arranged on the primary chamber (1), and one end of each busbar (6) penetrates through the wire inlet and outlet sleeve (5) to be connected with the solid-state switch (3).
2. The frame-type solid-state direct current circuit breaker according to claim 1, characterized in that the secondary chamber (2) is internally provided with a secondary power supply circuit, a control circuit and a status detection device.
3. The frame-type solid state direct current breaker according to claim 1, characterized in that the primary chamber (1) comprises a bottom plate (11), a top plate (12), a first side plate (13), a second side plate (14), a third side plate and a fourth side plate (15);
the first side plate (13), the second side plate (14), the third side plate and the fourth side plate (15) form a box body with a containing cavity, the first side plate (13), the second side plate (14), the third side plate and the bottom of the fourth side plate (15) are all connected with the bottom plate (11), the second side plate (14), the top of the third side plate and the top of the fourth side plate (15) are all connected with the top plate (12), the opposite top ends of the second side plate (14) and the fourth side plate (15) are all provided with L-shaped notch (16), the upper end face of the first side plate (13) is flush with the bottom of the L-shaped notch (16), and one side end face of the top plate (12) far away from the second side plate (14) is flush with the top of the L-shaped notch (16).
4. A frame solid state direct current breaker according to claim 3, characterized in that the bottom of the secondary chamber (2) is in abutment with the second side plate (14) and the L-shaped slot (16), the top of the secondary chamber (2) is flush with the top plate (12), the first side of the secondary chamber (2) is flush with the first side plate (13), the second side of the secondary chamber (2) is flush with the second side plate (14), the fourth side of the secondary chamber (2) is flush with the fourth side plate (15); the bottom of the secondary chamber (2) is detachably connected with the first side plate (13), and the top of the secondary chamber (2) is detachably connected with the top plate (12).
5. A frame solid state direct current breaker according to claim 3, characterized in that grooves (131) are provided on both the first side plate (13) and the third side plate.
6. The frame-type solid state dc breaker according to any of the claims 3-5, characterized in that it further comprises a control screen (9), said control screen (9) being arranged on said fourth side plate (15), said fourth side plate (15) being further provided with an observation window (10) at one side of said control screen (9).
7. A frame solid state direct current breaker according to any of claims 3-5, characterized in that the solid state switch (3) comprises a fixed frame (31), a turn-off thyristor device (32), a heat sink assembly (33) and a lightning arrester (34);
the plurality of the turn-off thyristor devices (32) are arranged in the fixed frame (31) in a stacked mode, two sides of each turn-off thyristor device (32) are in contact with the heat dissipation assembly (33), a plurality of lightning arresters (34) are arranged, one end of each lightning arrester (34) is connected with the turn-off thyristor device (32), and the other end of each lightning arrester is connected with one busbar (6).
8. The frame-type solid state dc breaker according to claim 7, characterized in that the fixed frame (31) comprises a press-fit assembly (311), a first press plate (312), a second press plate, a first support plate (313) and a second support plate (314);
wherein the first support plate (313) and the second support plate (314) are arranged opposite to each other, and one end of the first support plate (313) is detachably connected with the second support plate (314) through the first pressing plate (312); the other end of the first supporting plate (313) is detachably connected with the second supporting plate (314) through the second pressing plate; the press-fit assembly (311) is arranged on the first pressing plate (312), and the press-fit assembly (311) is used for press-fitting a plurality of turn-off thyristor devices (32) and a plurality of heat dissipation assemblies (33) which are arranged in a stacked mode between the first pressing plate (312) and the second pressing plate.
9. The frame-type solid state dc breaker according to claim 7, characterized in that the heat dissipating assembly (33) comprises heat dissipating tubes (331) and heat dissipating fins (332);
the radiating fins (332) are arranged in a plurality of blocks, the radiating pipes (331) are arranged in 2n blocks, n is a positive integer, each radiating fin (332) is provided with 2n first through holes matched with the radiating pipes (331), one ends of the 2n radiating pipes (331) are in contact with the turn-off thyristor device (32), and the other ends of the 2n radiating pipes (331) penetrate through the first through holes of the plurality of radiating fins (332) and are connected with the plurality of radiating fins (332).
10. The frame-type solid-state direct current breaker according to claim 9, wherein a plurality of radiating fins (332) are arranged on the upper portion of the fixed frame (31) and are arranged at equal intervals, 2n radiating pipes (331) in each radiating component (33) are arranged in two groups in parallel, n radiating pipes (331) in each group of radiating pipes (331) are arranged at equal intervals, a fixed threaded hole (333) is further formed in the radiating fin (332) on the uppermost layer in each radiating component (33), square holes (121) and second through holes (122) are formed in the top plate (12), the second through holes (122) are arranged in a matched mode with the fixed threaded holes (333), the number of the square holes (121) and the number of the radiating components (33) are arranged in a one-to-one correspondence mode, and the upper ends of the radiating pipes (331) of each radiating component (33) penetrate through the square holes (121).
11. The frame-type solid state direct current circuit breaker according to claim 10, characterized in that the first and second ventilation holes (7) are located on both sides of a plurality of heat radiating fins (332) in the heat radiating member (33), respectively.
12. The frame-type solid state direct current breaker according to claim 7, characterized in that the turn-off thyristor device (32) is a reverse-resistance IGCT.
CN202310324794.6A 2023-03-29 2023-03-29 Frame type solid-state direct current breaker Pending CN116526418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310324794.6A CN116526418A (en) 2023-03-29 2023-03-29 Frame type solid-state direct current breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310324794.6A CN116526418A (en) 2023-03-29 2023-03-29 Frame type solid-state direct current breaker

Publications (1)

Publication Number Publication Date
CN116526418A true CN116526418A (en) 2023-08-01

Family

ID=87393041

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310324794.6A Pending CN116526418A (en) 2023-03-29 2023-03-29 Frame type solid-state direct current breaker

Country Status (1)

Country Link
CN (1) CN116526418A (en)

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