IGCT inverter valve assembly

Abstract

The application provides an IGCT converter valve assembly, comprising: a plurality of integrated gate-commutated thyristors, the plurality of integrated gate-commutated thyristors being arranged at intervals along a first direction; a plurality of first heat dissipation members, the plurality of first heat dissipation members being arranged at intervals, one integrated gate-commutated thyristor being arranged between two adjacent first heat dissipation members in abutment, the first heat dissipation member being in conductive cooperation with the integrated gate-commutated thyristor; a plurality of lightning protection devices, the plurality of lightning protection devices being arranged at intervals along a second direction with the plurality of integrated gate-commutated thyristors; a plurality of second heat dissipation members, one lightning protection device being arranged between two adjacent second heat dissipation members in abutment, the second heat dissipation member being in conductive cooperation with the lightning protection device; a press assembly for pressing the plurality of lightning protection devices and the plurality of second heat dissipation members; and a plurality of conductive rows, the conductive rows being in conductive connection between the first heat dissipation members and the second heat dissipation members. The application solves the problem that the lightning arrester in the related art makes the IGCT converter valve have poor continuous active turn-off operation capability.

Description

TECHNICAL FIELD

[0001] The present application relates to the electrical technical field, in particular to an IGCT converter valve assembly. BACKGROUND

[0002] In a high-voltage direct-current power transmission system, the IGCT converter valve as a key device, its operation reliability and performance directly affect the stability and efficiency of the entire power grid. IGCT refers to: Integrated Gate-Commutated Thyristor, Integrated Gate-Commutated Thyristor. The lightning arrester in the IGCT converter valve assembly is an important protection element to ensure the safe operation of the power system under transient overvoltage conditions. The lightning arrester mainly undertakes the task of transient overvoltage protection in the power system, and this task is often accompanied by a large amount of energy absorption. When the lightning arrester absorbs overvoltage energy, the energy will be converted into heat energy, and if this part of heat energy cannot be dissipated in time and effectively, it will accumulate inside the lightning arrester, thereby affecting the performance and service life of the lightning arrester.

[0003] However, the design of the lightning arrester in the related art focuses on low protection level or low voltage ratio to ensure that it can respond quickly under overvoltage conditions, improve the turn-off stress of the IGCT converter valve, and improve the voltage limiting effect. However, due to the characteristics of low protection level, low voltage ratio, and high energy of the lightning arrester, it is difficult to meet all the above conditions at the same time, so the upper limit of the energy bearing of the lightning arrester in the related art is low. This makes the lightning arrester unable to dissipate heat when it bears the commutation energy, and is prone to performance degradation or damage due to energy overload, so that the continuous active turn-off operation capability of the IGCT converter valve is poor, thereby making its ability to resist commutation failure poor.

[0004] Therefore, the lightning arrester in the related art makes the continuous active turn-off operation capability of the IGCT converter valve poor. SUMMARY

[0005] The main purpose of the present application is to provide an IGCT converter valve assembly to solve the problem that the lightning arrester in the related art makes the continuous active turn-off operation capability of the IGCT converter valve poor.

[0006] In order to achieve the above object, the application provides an IGCT converter valve assembly, comprising: a plurality of integrated gate-commutated thyristors, the plurality of integrated gate-commutated thyristors are arranged at intervals along a first direction; a plurality of first heat dissipation members, the plurality of first heat dissipation members are arranged at intervals, one integrated gate-commutated thyristor is arranged between adjacent two first heat dissipation members in abutment, the first heat dissipation member is in conductive cooperation with the integrated gate-commutated thyristor; a plurality of lightning protection devices, the plurality of lightning protection devices are arranged at intervals along a second direction with the plurality of integrated gate-commutated thyristors, the second direction is arranged at an angle with the first direction; a plurality of second heat dissipation members, the plurality of second heat dissipation members are arranged at intervals, one lightning protection device is arranged between adjacent two second heat dissipation members in abutment, the second heat dissipation member is in conductive cooperation with the lightning protection device; a press assembly for pressing the plurality of lightning protection devices and the plurality of second heat dissipation members; a plurality of conductive rows, the conductive rows conductively connect the first heat dissipation members and the second heat dissipation members.

[0007] Further, the second heat dissipation member is a heat sink, the heat sink is provided with a first heat dissipation channel, the first heat dissipation channel has a cooling liquid inlet and a cooling liquid outlet.

[0008] Further, the IGCT converter valve assembly further comprises a first communication pipe, the cooling liquid outlet of one of the adjacent two second heat dissipation members is in communication with the cooling liquid inlet of the other second heat dissipation member through the first communication pipe.

[0009] Further, the IGCT converter valve assembly further comprises a second communication pipe, the first heat dissipation member is provided with a second heat dissipation channel, the second heat dissipation channels of the plurality of first heat dissipation members are in communication through the second communication pipe, the second communication pipe is arranged in parallel with the first communication pipe.

[0010] Further, the second heat dissipation member is a heat sink, the heat sink is provided with a first heat dissipation channel, the first heat dissipation channel has a cooling liquid inlet and a cooling liquid outlet.

[0011] Further, the press assembly comprises a first vertical plate, a second vertical plate and a screw rod, the first vertical plate and the second vertical plate are fixedly arranged, the plurality of lightning protection devices and the plurality of second heat dissipation members are located between the first vertical plate and the second vertical plate, the first vertical plate is provided with a threaded hole, the screw rod is in threaded cooperation with the threaded hole, and the screw rod is in abutting cooperation with the second heat dissipation member close to the first vertical plate.

[0012] Further, the lightning protection device and the adjacent second heat dissipation member therebetween are provided with a positioning structure, the positioning structure comprises a positioning groove and a positioning protrusion in positioning cooperation with the positioning groove, the positioning groove is arranged on one of the lightning protection device and the second heat dissipation member, and the positioning protrusion is arranged on the other one of the lightning protection device and the second heat dissipation member.

[0013] Further, the lightning protection device comprises the lightning arrester, the conductive end cover and the insulating cylinder, the conductive end cover is two, two conductive end covers are arranged on two sides of the lightning arrester, the conductive end cover is arranged in close contact with the second heat sink, and the insulating cylinder is arranged around the outer periphery of the lightning arrester.

[0014] Further, the positioning structure is arranged between the conductive end cover and the second heat sink adjacent to the conductive end cover.

[0015] Further, the lightning protection device further comprises an insulating umbrella skirt, and the insulating umbrella skirt is arranged around the outer periphery of the insulating cylinder.

[0016] Further, the insulating umbrella skirt is made of rubber material, the insulating cylinder is provided with a pressure relief groove, and the insulating umbrella skirt covers the outer side of the pressure relief groove.

[0017] Further, the positioning structure is arranged between the lightning protection device and the second heat sink adjacent to the lightning protection device, the positioning structure comprises a first positioning groove, a second positioning groove and a positioning pin, the first positioning groove is arranged on the lightning protection device, the second positioning groove is arranged on the second heat sink, and the positioning pin is arranged in the first positioning groove and the second positioning groove.

[0018] Further, each lightning protection device comprises one lightning arrester, a plurality of first heat sinks and a plurality of second heat sinks are arranged in one-to-one correspondence, and a plurality of conductive rows are connected between the plurality of first heat sinks and the plurality of second heat sinks in one-to-one correspondence.

[0019] Further, the lightning protection device is m, each lightning protection device comprises n lightning arresters, the n lightning arresters are arranged in close contact and electrically connected, and the second heat sink is m+1.

[0020] Further, the integrated gate-commutated thyristor is , the first heat sink is , the conductive row is m+1, the m+1 conductive rows are arranged in one-to-one correspondence with the m+1 second heat sinks, the second heat sink and the first heat sink corresponding to the second heat sink are electrically connected through a conductive row, and m and n are positive integers.

[0021] Further, the first direction and the second direction are arranged perpendicularly.

[0022] The technical scheme of the present application is applied to an IGCT converter valve assembly, which comprises a plurality of integrated gate-commutated thyristors, a plurality of first heat dissipation members, a plurality of lightning protection devices, a plurality of second heat dissipation members, a press assembly, and a plurality of conductive bars. The plurality of integrated gate-commutated thyristors are arranged at intervals along a first direction. The plurality of first heat dissipation members are arranged at intervals, and one integrated gate-commutated thyristor is arranged between adjacent two first heat dissipation members in a fit manner, and the first heat dissipation member is in conductive cooperation with the integrated gate-commutated thyristor. The plurality of lightning protection devices and the plurality of integrated gate-commutated thyristors are arranged at intervals along a second direction, and the second direction is arranged at an angle with the first direction. The plurality of second heat dissipation members are arranged at intervals, and one lightning protection device is arranged between adjacent two second heat dissipation members in a fit manner, and the second heat dissipation member is in conductive cooperation with the lightning protection device. The press assembly is used for pressing the plurality of lightning protection devices and the plurality of second heat dissipation members. The conductive bars are used for electrically connecting the first heat dissipation members and the second heat dissipation members. In this way, the IGCT converter valve assembly realizes effective thermal management of the plurality of integrated gate-commutated thyristors through the arrangement of the plurality of integrated gate-commutated thyristors and the plurality of first heat dissipation members. Moreover, the arrangement of the plurality of integrated gate-commutated thyristors and the plurality of first heat dissipation members can increase the contact area of the integrated gate-commutated thyristor and the adjacent first heat dissipation member, improve the heat conduction efficiency, and ensure that the integrated gate-commutated thyristor can quickly dissipate heat when running under high load and keep within a safe temperature range. Through the arrangement of the plurality of second heat dissipation members and the plurality of lightning protection devices, effective thermal management of the lightning protection device is realized. Moreover, the arrangement of the plurality of second heat dissipation members and the plurality of lightning protection devices can increase the contact area of the second heat dissipation member and the adjacent lightning protection device, improve the heat conduction efficiency, and ensure that the lightning protection device can quickly dissipate heat. With the rapid dissipation of heat of the lightning protection device, the accumulation of energy in the lightning protection device can be reduced, thereby reducing the performance degradation or damage caused by energy overload and improving the continuous active shutdown operation capability of the IGCT converter valve. Moreover, through the arrangement of the press assembly, the heat transfer efficiency between the plurality of lightning protection devices and the plurality of second heat dissipation members can be further improved, thereby further improving the heat dissipation efficiency of the lightning protection device, reducing the accumulation of energy in the lightning protection device, and reducing the performance degradation or damage caused by energy overload and improving the continuous active shutdown operation capability of the IGCT converter valve. The arrangement of the press assembly can also make the structure of the plurality of lightning protection devices and the plurality of second heat dissipation members more compact, thereby improving the integration of the IGCT converter valve assembly. Therefore, the technical scheme of the present application effectively solves the problem of poor continuous active shutdown operation capability of the IGCT converter valve caused by the lightning arrester in the related art.

[0023] Further, the first heat dissipation member is in conductive cooperation with the integrated gate-commutated thyristor, the second heat dissipation member is in conductive cooperation with the lightning protection device, and the conductive row electrically connects the first heat dissipation member and the second heat dissipation member, so that the integrated gate-commutated thyristor can be electrically connected with the lightning protection device, and the lightning protection device can absorb voltage energy and undertake the task of transient overvoltage protection. The electrical connection established by the conductive row between the first heat dissipation member and the second heat dissipation member not only reduces the resistance therebetween, improves the current transmission efficiency, and reduces the energy loss at the electrical connection, but also further enhances the heat management capability of the entire IGCT converter valve assembly through the high thermal conductivity of the conductive row. The presence of the conductive row is equivalent to constructing an efficient and reliable heat and electrical energy transmission channel in the IGCT converter valve assembly, so that the first heat dissipation member and the second heat dissipation member can work cooperatively, the heat distribution and discharge are optimized, the stable operation state of the assembly in a high-temperature, high-voltage and large-current environment is ensured, the service life of the device is prolonged, the maintenance cost is reduced, the IGCT converter valve assembly can continuously and stably operate in complex and harsh working conditions, resist the impact of commutation failure and other electrical faults, and provide strong support for the safe and efficient operation of the high-voltage direct current transmission system. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein for explanation by referring to the embodiments of the present application. In the drawings:

[0025] Figure 1 FIG. 1 shows a structural schematic diagram of an embodiment of the IGCT converter valve assembly according to the present application, when each lightning protection device of the IGCT converter valve assembly includes one arrester;

[0026] Figure 2 FIG. 2 shows a structural schematic diagram of the IGCT converter valve assembly of Figure 1 FIG. 3 shows a structural schematic diagram of the IGCT converter valve assembly of

[0027] Figure 3 FIG. 4 shows a perspective schematic diagram of the IGCT converter valve assembly of Figure 1 FIG. 5 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of

[0028] Figure 4 FIG. 6 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of Figure 1 FIG. 7 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of

[0029] Figure 5 FIG. 8 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of Figure 1 FIG. 9 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of

[0030] Figure 6 FIG. 10 shows a perspective schematic diagram of an embodiment of the lightning protection device of the IGCT converter valve assembly of Figure 1Fig. 6 is a perspective schematic view of another embodiment of the lightning protection device of the IGCT converter valve assembly of Fig. 1 ;

[0031] Figure 7 Fig. 7 is a perspective schematic view of yet another embodiment of the lightning protection device of the IGCT converter valve assembly of Fig. 1 ; Figure 1

[0032] Figure 8 Fig. 8 is a perspective schematic view of still another embodiment of the lightning protection device of the IGCT converter valve assembly of Fig. 1 ; Figure 1

[0033] Figure 9 Fig. 9 is a schematic view of the lightning protection device of the IGCT converter valve assembly of Fig. 1 at the second heat sink. Figure 1

[0034] In the drawings, the following reference numerals are used:

[0035] 10, integrated gate commutated thyristor;

[0036] 20, first heat sink;

[0037] 30, lightning protection device; 31, arrester; 32, conductive end cap; 321, positioning groove; 33, insulating cylinder; 331, pressure relief groove; 34, insulating umbrella skirt; 35, first positioning groove;

[0038] 40, second heat sink; 41, cooling liquid inlet; 42, cooling liquid outlet; 43, second positioning groove; 44, positioning pin;

[0039] 50, conductive bar;

[0040] 60, first communication pipe. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative in nature and by no means as any limitation to the present application and its application or use. All other embodiments obtained by a person of ordinary skill in the art without any creative effort on the basis of the embodiments in the present application shall fall within the scope of the present application.

[0042] ​​​It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, in accordance with the example embodiments of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0043] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the actual proportions used in the fabrication of the various portions shown therein. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification, where appropriate. In all examples shown and discussed herein, any particular value is to be interpreted as merely an example, and not a limitation. Thus, other examples of example embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is needed.

[0044] As Figure 1 and Figure 2As shown, by applying the technical scheme of the embodiment, the IGCT converter valve assembly comprises: a plurality of integrated gate-commutated thyristors 10, a plurality of first heat dissipation members 20, a plurality of lightning protection devices 30, a plurality of second heat dissipation members 40, a press assembly, and a plurality of conductive bars 50. The plurality of integrated gate-commutated thyristors 10 are arranged at intervals along a first direction. The plurality of first heat dissipation members 20 are arranged at intervals, and one integrated gate-commutated thyristor 10 is arranged between adjacent two first heat dissipation members 20 in abutment, and the first heat dissipation member 20 is in conductive cooperation with the integrated gate-commutated thyristor 10. The plurality of lightning protection devices 30 and the plurality of integrated gate-commutated thyristors 10 are arranged at intervals along a second direction, and the second direction is arranged at an angle with the first direction. The plurality of second heat dissipation members 40 are arranged at intervals, and one lightning protection device 30 is arranged between adjacent two second heat dissipation members 40 in abutment, and the second heat dissipation member 40 is in conductive cooperation with the lightning protection device 30. The press assembly is used for pressing the plurality of lightning protection devices 30 and the plurality of second heat dissipation members 40. The conductive bar 50 electrically connects the first heat dissipation member 20 and the second heat dissipation member 40. In this way, the IGCT converter valve assembly realizes effective thermal management of the plurality of integrated gate-commutated thyristors 10 through the arrangement of the plurality of integrated gate-commutated thyristors 10 and the plurality of first heat dissipation members 20. Moreover, the arrangement mode of the plurality of integrated gate-commutated thyristors 10 and the plurality of first heat dissipation members 20 can also increase the contact area of the integrated gate-commutated thyristor 10 and the adjacent first heat dissipation member 20, improve the heat conduction efficiency, and ensure that the integrated gate-commutated thyristor 10 can quickly dissipate heat when running under high load, and keep within a safe temperature range. Through the arrangement of the plurality of second heat dissipation members 40 and the plurality of lightning protection devices 30, effective thermal management of the lightning protection device 30 is realized. Moreover, the arrangement mode of the plurality of second heat dissipation members 40 and the plurality of lightning protection devices 30 can also increase the contact area of the second heat dissipation member 40 and the adjacent lightning protection device 30, improve the heat conduction efficiency, and ensure that the lightning protection device 30 can quickly dissipate heat. With the rapid dissipation of heat of the lightning protection device 30, the accumulation of energy in the lightning protection device 30 can be reduced, thereby reducing the performance degradation or damage caused by energy overload, and making the IGCT converter valve continuous active shutdown operation ability poor. Moreover, through the arrangement of the press assembly, the heat transfer efficiency between the plurality of lightning protection devices 30 and the plurality of second heat dissipation members 40 can be further improved, thereby further accelerating the heat dissipation efficiency of the lightning protection device 30, thereby reducing the accumulation of energy in the lightning protection device 30, thereby reducing the performance degradation or damage caused by energy overload, and making the IGCT converter valve continuous active shutdown operation ability poor. The arrangement of the press assembly can also make the structure of the plurality of lightning protection devices 30 and the plurality of second heat dissipation members 40 more compact, and improve the integration of the IGCT converter valve assembly. Therefore, the technical scheme of the embodiment effectively solves the problem that the lightning arrester makes the IGCT converter valve continuous active shutdown operation ability poor in the related art.

[0045] Further, the setting of the electrically conductive connection of the first heat dissipation member 20 and the second heat dissipation member 40 through the electrically conductive row 50, the electrically conductive connection of the integrated gate-commutated thyristor 10 and the lightning protection device 30, and the electrically conductive connection of the first heat dissipation member 20 and the second heat dissipation member 40 enable the integrated gate-commutated thyristor 10 to be electrically connected with the lightning protection device 30, so that the lightning protection device 30 can absorb voltage energy and take on the task of transient overvoltage protection. The electrically conductive row 50 establishes an electrical connection between the first heat dissipation member 20 and the second heat dissipation member 40, which not only reduces the electrical resistance between the two and improves the current transmission efficiency and reduces the energy loss at the electrical connection, but also further enhances the heat management capability of the entire IGCT converter valve assembly through the high thermal conductivity of the electrically conductive row 50. The presence of the electrically conductive row 50 is equivalent to building an efficient and reliable heat and electrical energy transmission channel in the IGCT converter valve assembly, so that the first heat dissipation member 20 and the second heat dissipation member 40 can work together to optimize the distribution and discharge of heat, ensuring that the IGCT converter valve assembly can still maintain a stable operating state in a high-temperature, high-voltage, and high-current environment, prolonging the service life of the device and reducing maintenance costs. The IGCT converter valve assembly can continue to operate stably in complex and harsh working conditions, withstand the impact of commutation failure and other electrical faults, and provide strong support for the safe and efficient operation of the high-voltage direct current transmission system.

[0046] Moreover, the inventors found that the terminal-to-terminal insulation distance of the existing lightning arrester is affected by the bolts, and is prone to problems such as local discharge and even breakdown due to insufficient air gap, which seriously endangers the normal operation of the converter valve. The above-mentioned embodiments can reduce the volume of the lightning protection device 30 by the setting of the press-fitting assembly, and also change the connection part of the integrated gate-commutated thyristor 10 to the electrically conductive row 50, forming a larger air gap and avoiding the tip discharge caused by the bolts in the related art. The setting of the press-fitting assembly facilitates the press-fitting and fixing of multiple lightning protection devices 30 and multiple second heat dissipation members 40, replacing the fixing of the lightning protection device 30 and the second heat dissipation member 40 by bolts in the related art, so that the assembly of the IGCT converter valve assembly is simpler, and the cancellation of the setting of the bolts reduces the occupation of the internal space of the IGCT converter valve assembly, making the structure more compact. The setting of the press-fitting assembly enables the lightning protection device 30 to dissipate heat at all times by press-fitting multiple lightning protection devices 30 and multiple second heat dissipation members 40, so that energy can be discharged in time through the end surface of the lightning protection device 30 to maintain its thermal stability.

[0047] As Figure 3As shown, the second heat dissipation member 40 is a radiator, and the first heat dissipation channel is arranged in the radiator, and the first heat dissipation channel has a cooling liquid inlet 41 and a cooling liquid outlet 42. The second heat dissipation member 40 is designed as a radiator with a first heat dissipation channel, which can increase the contact area of the second heat dissipation member 40 with the cooling liquid, improve the heat dissipation efficiency of the second heat dissipation member 40, and enable the lightning arrester 30 to timely transfer and dissipate heat energy when the lightning arrester 30 absorbs overvoltage energy and converts it into heat energy, thereby taking away the heat inside the lightning arrester 30 and preventing the performance of the lightning arrester 30 from being degraded or damaged due to heat accumulation, thereby prolonging the service life of the lightning arrester 30 and enhancing the continuous operation capability and commutation failure resistance of the IGCT valve assembly.

[0048] As shown in Figure 3 The IGCT valve assembly further includes a first communication pipe 60, and the cooling liquid outlet 42 of one of the two adjacent second heat dissipation members 40 is in communication with the cooling liquid inlet 41 of the other second heat dissipation member 40 through the first communication pipe 60. The design of the first communication pipe 60 communicates multiple second heat dissipation members 40, forms a cooling liquid circulation system, and ensures that the cooling liquid can flow uniformly between multiple lightning arresters 30, thereby achieving heat energy balance of the entire IGCT valve assembly.

[0049] Further, the IGCT valve assembly further includes a second communication pipe, and the first heat dissipation member 20 is provided with a second heat dissipation channel, and the second heat dissipation channels of multiple first heat dissipation members 20 are in communication through the second communication pipe, and the second communication pipe is arranged in parallel with the first communication pipe 60. The cooling system formed by the parallel connection of the second communication pipe and the first communication pipe 60 provides a direct cooling liquid circulation path for the first heat dissipation member 20 and the second heat dissipation member 40, protects the key devices from overheating damage, and enhances the stability and reliability of the system. Moreover, the parallel connection of the second communication pipe and the first communication pipe 60 enables the flow of cooling liquid of multiple first heat dissipation members 20 and multiple second heat dissipation members 40 to be independent of each other, thereby improving the heat dissipation efficiency of the integrated gate-commutated thyristor 10 and the lightning arrester 30.

[0050] In some embodiments, the first heat dissipation channel, the second communication pipe, and the flowing liquid medium in the first communication pipe 60 are preferably cooling liquid. The second communication pipe and the first communication pipe 60 are not in communication with each other. The second communication pipe and the first communication pipe 60 can be connected in parallel on a cooling liquid supply device, and cooling liquid can be respectively introduced into the second communication pipe and the first communication pipe 60 to form a water cooling system.

[0051] As shown in Figure 4In other embodiments, the second heat dissipation member 40 is a heat conduction block having a first plane and a second plane arranged opposite to each other, and the first plane and the second plane are arranged to be in close contact with the two adjacent lightning arresters 30, respectively. The design of the second heat dissipation member 40 as a heat conduction block with the first plane and the second plane in close contact with the lightning arresters 30 not only simplifies the structure of the heat dissipation system and reduces the complexity of assembly and maintenance, but also enables faster and more uniform heat dissipation of the heat generated by the lightning arresters 30 due to the high thermal conductivity of the heat conduction block, thereby accelerating the heat transfer process and improving the thermal stability and continuous operation capability of the lightning arresters 30.

[0052] Further, the press-fitting assembly includes a first vertical plate and a second vertical plate fixedly arranged, and the plurality of lightning arresters 30 and the plurality of second heat dissipation members 40 are located between the first vertical plate and the second vertical plate. The first vertical plate is provided with a threaded hole, and a screw is threadedly connected with the threaded hole. The screw is in abutting connection with the second heat dissipation member 40 close to the first vertical plate. In this way, the screw can abut the plurality of lightning arresters 30 and the plurality of second heat dissipation members 40 between the end face of the screw and the second vertical plate by the cooperation of the screw and the threaded hole on the first vertical plate, ensuring the close contact between the lightning arresters 30 and the second heat dissipation members 40, reducing the gap between the lightning arresters 30 and the second heat dissipation members 40, and improving the efficiency of heat transfer. The press-fitting mode of the press-fitting assembly also improves the mechanical strength and installation stability of the lightning arresters 30 and the second heat dissipation members 40 during fixation, reduces vibration and noise during operation, and provides a more stable operating environment for the IGCT valve assembly.

[0053] In some embodiments, the IGCT valve assembly further includes an insulating plate arranged between the second heat dissipation member 40 close to the first vertical plate and the screw, and the area of the insulating plate is greater than the cross-sectional area of the screw. The arrangement of the insulating plate effectively isolates the direct contact between the screw and the second heat dissipation member 40, reduces the possibility of deformation of the second heat dissipation member 40 caused by the abutment of the screw, makes the stress on the second heat dissipation member 40 more uniform, and makes the press connection between the second heat dissipation member 40 and the lightning arrester 30 more reliable. Since the area of the insulating plate is greater than the cross-sectional area of the screw, this design expands the distribution area of the pressing force, making the pressure on the second heat dissipation member 40 more uniform and avoiding local overpressure leading to structural deformation or damage. This not only improves the contact quality between the second heat dissipation member 40 and the lightning arrester 30 and improves the heat dissipation efficiency, but also ensures the electrical connection stability and thermal management consistency between the lightning arrester 30 and the second heat dissipation member 40, further enhancing the continuous operation capability and fault resistance of the IGCT valve assembly.

[0054] In other embodiments, when the press-fit assembly is connected with an external mounting base such as a mounting rack or a mounting seat, the first vertical plate and the second vertical plate are connected with the mounting base to achieve fixed arrangement of the first vertical plate and the second vertical plate.

[0055] As shown in Figure 6 and Figure 8 , the lightning arrester 30 and its adjacent second heat sink 40 are provided with a positioning structure, which includes a positioning groove 321 and a positioning protrusion in positioning cooperation with the positioning groove 321. The positioning groove 321 is arranged on the lightning arrester 30, and the positioning protrusion is arranged on the second heat sink 40. The positioning structure design of the positioning groove 321 and the positioning protrusion accurately controls the relative position between the lightning arrester 30 and the second heat sink 40, avoids misplacement or loosening in the assembly process or the press-fit process, and ensures the stability of electrical connection and the reliability of heat conduction. At the same time, the design of the positioning structure is conducive to improving the degree of production automation, improving the assembly precision, and reducing the manufacturing cost.

[0056] In other embodiments, the positioning groove 321 is arranged on the second heat sink 40, and the positioning protrusion is arranged on the lightning arrester 30.

[0057] As shown in Figures 5 to 8 , the lightning arrester 30 includes a lightning arrester 31, two conductive end covers 32, and an insulating cylinder 33. The two conductive end covers 32 are arranged on the two sides of the lightning arrester 31 opposite to each other, and the conductive end covers 32 are arranged in close contact with the second heat sink 40. The insulating cylinder 33 is arranged around the outer periphery of the lightning arrester 31. The lightning arrester 30 is composed of the lightning arrester 31, the conductive end covers 32, and the insulating cylinder 33. This structure design improves the electrical insulation level of the lightning arrester 31. The use of the conductive end covers 32 increases the contact area between the lightning arrester 31 and the second heat sink 40, and promotes the rapid transfer of heat. The arrangement of the insulating cylinder 33 ensures that the lightning arrester 31 has sufficient insulation performance in a high-voltage environment, prevents electrical faults, and improves the overall safety and reliability of the IGCT converter valve assembly.

[0058] In other embodiments, the lightning arrester 30 includes two lightning arresters 31 arranged in abutment, two conductive end covers 32 arranged in abutment on the outer surfaces of the two lightning arresters 31 arranged in opposite directions, an insulating cylinder 33 arranged around the outer periphery of the two lightning arresters 31, and an insulating umbrella skirt 34 arranged around the outer periphery of the insulating cylinder 33. By arranging the two lightning arresters 31 in abutment, the energy absorption capacity of the lightning arrester 30 is substantially increased, and the two lightning arresters 31 can share the energy impact, reducing the risk of overloading of a single lightning arrester 31. This design can provide stronger protection capability when the high-voltage direct-current transmission system encounters a sudden overvoltage, ensuring system stability. The conductive end covers 32 arranged in abutment on the outer surfaces of the two lightning arresters 31 ensure the tightness of the electrical connection between the lightning arresters 31 and the outside, improve the energy conversion and heat transfer efficiency, and enhance the electrical performance and heat management capability of the lightning arrester 30. The insulating cylinder 33 arranged around the outer periphery of the two lightning arresters 31 and the insulating umbrella skirt 34 arranged around the outer periphery of the insulating cylinder 33 can fix the two lightning arresters 31 and achieve insulation of the lightning arresters 31, reducing the processing cost and processing steps.

[0059] In some embodiments, to ensure that the lightning arrester 31 has sufficient heat dissipation surface, can withstand sufficient crimping force, and has sufficient external insulation level, the lightning arrester 31 and the conductive end cover 32 should ensure that the end surface is sufficient in level and configure a positioning structure as needed.

[0060] Further, the positioning structure is arranged between the conductive end cover 32 and the second heat dissipation member 40 adjacent thereto. In this way, the position between the conductive end cover 32 and the second heat dissipation member 40 is more accurate, and the abutment between the conductive end cover and the second heat dissipation member 40 is improved through the press-fit assembly, thereby improving the heat conduction efficiency and the electrical conductivity between the conductive end cover and the second heat dissipation member 40. Moreover, the above-mentioned arrangement structure is simple and facilitates the processing of the lightning arrester 30.

[0061] As shown in FIG. 1, Figures 5 to 8 The lightning arrester 30 further includes the insulating umbrella skirt 34 arranged around the outer periphery of the insulating cylinder 33. The arrangement of the insulating umbrella skirt 34 not only improves the insulation performance of the lightning arrester 30, prevents electrical short circuit in a high-voltage environment, but also further ensures that the lightning arrester 31 has sufficient insulation performance in a high-voltage environment, prevents electrical failure, and improves the overall safety and reliability of the IGCT converter valve assembly.

[0062] As shown in FIG. 1, Figure 7 and Figure 8As shown, the insulating umbrella skirt 34 is made of rubber material, and the insulating cylinder 33 is provided with a pressure relief groove 331, and the insulating umbrella skirt 34 covers the outside of the pressure relief groove 331. The above-mentioned setting can preset the breaking position of the insulating cylinder 33 through the setting of the pressure relief groove 331. When overpressure occurs and the lightning arrester 31 needs to release pressure, and the insulating cylinder 33 is broken, since the insulating umbrella skirt 34 is made of rubber material, the insulating umbrella skirt 34 has elasticity, and the insulating umbrella skirt 34 surrounding the outer periphery of the insulating cylinder 33 can also wrap the debris generated when the lightning arrester 31 or the insulating cylinder 33 is broken, avoiding the free flying of the lightning arrester 31 or the insulating cylinder 33 fragments, and reducing the influence on other structures. The setting of the pressure relief groove 331 can make the stress distribution of the lightning arrester 31 not uniform when overpressure occurs, so that the pressure relief groove 331 is easy to break, and the pressure relief groove 331 is covered by the insulating umbrella skirt 34, reducing the free flying of the lightning arrester 31 or the insulating cylinder 33 fragments. And since the insulating umbrella skirt 34 is made of rubber material, the insulating umbrella skirt 34 has elasticity, reducing the possibility of the insulating umbrella skirt 34 being broken by the influence of the lightning arrester 31 or the insulating cylinder 33, and the insulating umbrella skirt 34 made of rubber material can more effectively wrap and cover the lightning arrester 31 and the insulating cylinder 33, ensuring the insulation performance of the lightning arrester 31 and the insulating cylinder 33 before and after breaking, and enhancing the safety and reliability of the lightning arrester 30.

[0063] Preferably, as shown in Figure 7 and Figure 8 shown, the insulating cylinder 33 has an inner side wall and an outer side wall, the inner side wall of the insulating cylinder 33 is in contact with the lightning arrester 31, the insulating umbrella skirt 34 is sleeved outside the outer side wall of the insulating cylinder 33, and the insulating umbrella skirt 34 is made of rubber material. The pressure relief groove 331 is arranged on the inner side wall of the insulating cylinder 33, and the opening of the pressure relief groove 331 is arranged towards the lightning arrester 31. In this way, when overpressure occurs and the lightning arrester 31 is broken, since the pressure relief groove 331 is arranged on the inner side wall of the insulating cylinder 33, and the opening of the pressure relief groove 331 is arranged towards the lightning arrester 31, the pressure released when the lightning arrester 31 is broken is more likely to affect the pressure relief groove 331, so that the pressure relief groove 331 of the insulating cylinder 33 is easy to bear greater force, so that the breaking of the insulating cylinder 33 is more controllable, reducing the influence on other areas. And since the insulating umbrella skirt 34 made of rubber material is sleeved outside the outer side wall of the insulating cylinder 33, the insulating umbrella skirt 34 made of rubber material can wrap the debris generated when the lightning arrester 31 is broken, avoiding the free flying of the lightning arrester 31 or the insulating cylinder 33 fragments, and reducing the influence on other structures.

[0064] In some embodiments, the insulating umbrella skirt 34 is arranged according to the insulation requirements of the lightning arrester 30, and can be made of ceramic for heat dissipation. When pressure release is needed, the insulating umbrella skirt 34 is made of rubber, which has a certain elasticity, so as to avoid the splashing of fragments of the lightning arrester 31 and reduce the influence on other structures.

[0065] As shown in Figure 9 , the lightning arrester 30 and the second heat dissipation member 40 adjacent thereto are provided with a positioning structure, which includes a first positioning groove 35, a second positioning groove 43, and a positioning pin 44. The first positioning groove 35 is arranged on the lightning arrester 30, the second positioning groove 43 is arranged on the second heat dissipation member 40, and the positioning pin 44 is arranged in the first positioning groove 35 and the second positioning groove 43. The positioning structure of the first positioning groove 35, the second positioning groove 43, and the positioning pin 44 accurately controls the relative position between the lightning arrester 30 and the second heat dissipation member 40, avoids mispositioning or loosening in the assembly process or the press-fitting process, and ensures the stability of electrical connection and the reliability of heat conduction. At the same time, the design of the positioning structure is conducive to improving the degree of automation of production, improving the assembly precision, and reducing the manufacturing cost.

[0066] As shown in Figure 5 , the lightning arrester 30 includes a lightning arrester 31, two conductive end covers 32, an insulating cylinder 33, and an insulating umbrella skirt 34. The two conductive end covers 32 are arranged on the two opposite sides of the lightning arrester 31, the conductive end cover 32 is arranged in close contact with the second heat dissipation member 40, and the insulating cylinder 33 is arranged around the outer periphery of the lightning arrester 31. The insulating umbrella skirt 34 is made of ceramic material.

[0067] As shown in Figure 6 , the lightning arrester 30 includes a lightning arrester 31, two conductive end covers 32, an insulating cylinder 33, and an insulating umbrella skirt 34. The two conductive end covers 32 are arranged on the two opposite sides of the lightning arrester 31, the conductive end cover 32 is arranged in close contact with the second heat dissipation member 40, and the insulating cylinder 33 is arranged around the outer periphery of the lightning arrester 31. The insulating umbrella skirt 34 is made of ceramic material, and the two conductive end covers 32 are each provided with a positioning groove 321, and the slot of the positioning groove 321 penetrates through the surface of the conductive end cover 32 away from the lightning arrester 31.

[0068] As shown in Figure 7As shown, the lightning protection device 30 includes a lightning arrester 31, two conductive end covers 32, an insulating cylinder 33, and an insulating umbrella skirt 34. The two conductive end covers 32 are arranged on the opposite sides of the lightning arrester 31, the conductive end covers 32 are arranged in close contact with the second heat sink 40, and the insulating cylinder 33 is arranged around the outer periphery of the lightning arrester 31. The insulating umbrella skirt 34 is made of rubber material. The insulating cylinder 33 is provided with a pressure relief groove 331, and the insulating cylinder 33 has an inner side wall and an outer side wall, the inner side wall of the insulating cylinder 33 is in contact with the lightning arrester 31, and the insulating umbrella skirt 34 is sleeved outside the outer side wall of the insulating cylinder 33. The pressure relief groove 331 is arranged on the inner side wall of the insulating cylinder 33, and the opening of the pressure relief groove 331 is arranged towards the lightning arrester 31. In this way, when overvoltage occurs and the lightning arrester 31 breaks, since the pressure relief groove 331 is arranged on the inner side wall of the insulating cylinder 33, and the opening of the pressure relief groove 331 is arranged towards the lightning arrester 31, the pressure released when the lightning arrester 31 breaks is more likely to affect the pressure relief groove 331, so that the pressure relief groove 331 of the insulating cylinder 33 is more likely to bear greater force, thereby making the broken part of the insulating cylinder 33 more controllable, and reducing the impact on other areas. Moreover, since the insulating umbrella skirt 34 made of rubber material is sleeved outside the outer side wall of the insulating cylinder 33, the insulating umbrella skirt 34 made of rubber material can wrap the debris generated when the lightning arrester 31 breaks, avoiding the free flying of the fragments of the lightning arrester 31 or the insulating cylinder 33, and reducing the impact on other structures.

[0069] As Figure 8As shown, the surge arrester 30 includes a surge arrester 31, two conductive end caps 32, an insulating cylinder 33, and an insulating skirt 34. The two conductive end caps 32 are located on opposite sides of the surge arrester 31 and are fitted into the second heat sink 40. The insulating cylinder 33 surrounds the outer periphery of the surge arrester 31. The insulating skirt 34 is made of rubber. A pressure relief groove 331 is provided on the insulating cylinder 33. The insulating cylinder 33 has an inner wall and an outer wall. The inner wall of the insulating cylinder 33 contacts the surge arrester 31, and the insulating skirt 34 is fitted over the outer wall of the insulating cylinder 33. The pressure relief groove 331 is located on the inner wall of the insulating cylinder 33, and its opening faces the surge arrester 31. Thus, when an overvoltage condition causes the surge arrester 31 to break, the pressure relief groove 331, located on the inner wall of the insulating cylinder 33 with its opening facing the surge arrester 31, allows the pressure released during the breakage of the surge arrester 31 to more easily affect the pressure relief groove 331. This makes the pressure relief groove 331 of the insulating cylinder 33 more susceptible to bearing greater force, making the breakage of the insulating cylinder 33 more controllable and reducing the impact on other areas. Furthermore, the rubber insulating skirt 34, fitted over the outer wall of the insulating cylinder 33, can effectively encapsulate the debris generated when the surge arrester 31 breaks, preventing the free-flying of fragments from the surge arrester 31 or the insulating cylinder 33 and reducing the impact on other structures. Both conductive end caps 32 are provided with positioning grooves 321, the openings of which penetrate the conductive end caps 32 away from the surface of the surge arrester 31.

[0070] like Figure 1 As shown, each surge arrester 30 includes a surge arrester 31, multiple first heat sinks 20 and multiple second heat sinks 40 are arranged in a one-to-one correspondence, and multiple conductive busbars 50 are connected one-to-one between the multiple first heat sinks 20 and multiple second heat sinks 40. This arrangement ensures the heat dissipation efficiency of each surge arrester 31, ensuring that the heat generated by the surge arrester 31 can be quickly absorbed by the second heat sinks 40, allowing the heat from each heat sink to dissipate rapidly. The conductive busbars 50 not only provide reliable electrical connections but also act as a medium for heat transfer, making the heat transfer between the first heat sinks 20 and the second heat sinks 40 smoother and improving the thermal management efficiency of the entire IGCT converter valve assembly. This precise one-to-one correspondence, combined with the highly conductive and thermally conductive busbars 50, constructs a highly efficient and integrated thermal management and electrical connection system, optimizing the heat dissipation performance of the IGCT converter valve assembly, extending its service life, and improving the continuous operation capability and fault adaptability of the IGCT converter valve assembly, providing a safer, more stable, and more efficient operational guarantee for the high-voltage direct current transmission system.

[0071] Preferably, such as Figure 1As shown, there are six second heat sinks 40, five lightning protection devices 30, and each lightning protection device 30 includes a surge arrester 31. There are six conductive busbars 50, five integrated gate commutated thyristors 10, and six first heat sinks 20. The six first heat sinks 20 and six second heat sinks 40 are arranged in a one-to-one correspondence, and the six conductive busbars 50 are connected one-to-one between the six first heat sinks 20 and the six second heat sinks 40.

[0072] like Figure 2 As shown, there are m surge protection devices 30, each including n surge arresters 31. The n surge arresters 31 are fitted together and electrically connected. There are m+1 second heat sinks 40. When each surge protection device 30 contains n surge arresters 31, it can significantly improve the overvoltage protection capability of the IGCT converter valve assembly, especially under high-frequency commutation failure conditions. It can disperse the transient energy borne by a single surge arrester 31, avoid local overload, and enhance the continuous working capability of the surge protection device 30. At the same time, the two second heat sinks 40 can be set on both sides of the n surge arresters 31 and dissipate heat from the n surge arresters 31, optimizing the heat dissipation performance of the IGCT converter valve assembly, extending its service life, improving the continuous operation capability and fault adaptability of the IGCT converter valve assembly, and providing a safer, more stable, and more efficient operation guarantee for the high-voltage direct current transmission system.

[0073] like Figure 2 As shown, the integrated gate commutated thyristor 10 is One, the first heat sink 20 is There are m+1 conductive busbars 50, and each m+1 conductive busbar 50 corresponds one-to-one with one m+1 second heat sinks 40. The second heat sinks 40 and their corresponding first heat sinks 20 are electrically connected via a conductive busbar 50. Through the aforementioned integration of the gate commutator thyristor 10, the first heat sink 20, the second heat sink 40, and the conductive busbars 50, as well as the matching arrangement of the conductive busbars 50, the continuous turn-off capability of the IGCT converter valve assembly can be effectively improved. This arrangement allows users to determine the quantity of each component of the IGCT converter valve assembly according to actual usage requirements, increasing the applicability of the IGCT converter valve assembly and ensuring that the IGCT converter valve assembly maintains a stable and controllable state during continuous active turn-off, preventing performance degradation or malfunction due to heat dissipation issues. This significantly enhances the IGCT converter valve assembly's ability to withstand commutation failures and improves the overall stability of the high-voltage direct current transmission system.

[0074] In the above embodiment, m+1 conductive busbars 50 are connected to m+1 second heat sinks 40 in a one-to-one correspondence, and the m+1 conductive busbars 50 and Each of the first heat sinks 20 is connected accordingly. That is, two adjacent conductive bars 50 are connected to each of the (n+1) first heat sinks 20. The first conductive bar 50 is connected between the first second heat sink 40 and the first first heat sink 20; the second conductive bar 50 is connected between the second second heat sink 40 and the (n+1)th first heat sink 20; the third conductive bar 50 is connected between the third second heat sink 40 and the (2n+1)th first heat sink 20; the fourth conductive bar 50 is connected between the fourth second heat sink 40 and the (3n+1)th first heat sink 20; and the m-th conductive bar 50 is connected between the m-th second heat sink 40 and the (n+1)th first heat sink 20. Between the first heat sink 20, the (m+1)th conductive bus 50 is connected to the (m+1)th second heat sink 40 and the first... Between the first heat sink component 20.

[0075] like Figure 2 As shown, preferably, there are four second heat sinks 40, three lightning protection devices 30, and each lightning protection device 30 includes two surge arresters 31. There are four conductive busbars 50, six integrated gate commutator thyristors 10, and seven first heat sinks 20. The four conductive busbars 50 are arranged in a one-to-one correspondence with the four second heat sinks 40. Two adjacent conductive busbars 50 are connected to three corresponding first heat sinks 20. The first conductive busbar 50 is connected between the first second heat sink 40 and the first first heat sink 20, the second conductive busbar 50 is connected between the second second heat sink 40 and the third first heat sink 20, the third conductive busbar 50 is connected between the third second heat sink 40 and the fifth first heat sink 20, and the fourth conductive busbar 50 is connected between the fourth second heat sink 40 and the seventh first heat sink 20.

[0076] Furthermore, the first direction is perpendicular to the second direction. This perpendicular arrangement allows the IGCT converter valve assembly and surge arrester to be arranged in the most compact manner, reducing the internal space occupied by the IGCT converter valve assembly and improving the module's integration. This layout also maintains convenient electrical connections and superior insulation performance, providing a more reliable and efficient design solution for high-voltage direct current transmission systems.

[0077] In this embodiment, the first direction and the second direction are located in the same horizontal plane and are perpendicular to each other.

[0078] High voltage direct current (HVDC) is the core technology to realize long-distance and large-capacity power transmission, and commutation failure is one of the key challenges. Commutation failure refers to the fact that, in the process of thyristor commutation, due to voltage drop, trigger delay or insufficient current, the valve arm fails to normally turn off, causing the DC current to be interrupted or the system to be short-circuited. In an ultra-high voltage system, the operating environment of high voltage and large current aggravates the risk of commutation failure, especially when the receiving end AC system fails, the voltage may drop suddenly, which may cause continuous commutation failure, threatening the stability of the power grid.

[0079] The inventors found that the controllable commutation converter valve in the related art is mainly based on controllable turn-off devices, and the fault ride-through mainly relies on the auxiliary commutation voltage provided by the arresters and capacitors. The component MOV (arrester) is used as a component-level device in the controllable commutation converter valve, which plays a role in suppressing the turn-off voltage and absorbing the commutation energy. However, due to the characteristics of low protection level, low voltage ratio and high energy of the component MOV (arrester), it is difficult to meet all the requirements at the same time. Therefore, the current design of the component MOV in the controllable commutation converter valve mainly considers the protection level, but there is an upper limit on the energy, so it cannot support continuous active turn-off. At the same time, the current arrester has a very slow heat dissipation (more than 6 hours), and it is difficult to withstand multiple turn-off impacts in a short time. In addition, the volume of the arrester is also a major problem affecting the engineering application of the converter valve. In summary, there is still room for improvement and upgrading of the current controllable commutation converter valve and arrester.

[0080] By applying the technical solutions of the above embodiments, the heat transfer efficiency between the multiple arrester devices and the multiple second heat dissipation members can be further improved through the arrangement of the second heat dissipation members and the press-fitting assembly, thereby further improving the heat dissipation efficiency of the arrester devices, reducing the accumulation of energy in the arrester devices, and solving the problem of limited turn-off times and slow energy absorption and heat dissipation of the arrester devices in the IGCT converter valve assembly due to the upper limit of energy. This is of great significance to improving the continuous active turn-off resistance to commutation failure, reducing the reactive power demand, and even having the ability to send out reactive power of the IGCT converter valve assembly. Moreover, the technical solutions of the above embodiments can improve the continuous energy absorption and heat dissipation capacity of the arrester devices; and the multiple arrester devices and the multiple second heat dissipation members can be fixed by the press-fitting assembly, reducing the need for additional fixing structures or connection structures, thereby reducing the space occupied by the arrester devices and making the structure of the IGCT converter valve assembly more compact. The technical solutions of the above embodiments improve the reliability of the IGCT converter valve assembly, which is limited by the number of continuous turn-offs and the arrester, and can meet the requirements of series voltage balancing of semiconductor devices (integrated gate-commutated thyristors) and continuous resistance to commutation failure and continuous active turn-off. The structure scheme based on the press-fitting arrester device is proposed, which improves the insulation reliability and continuous fault ride-through capability of the IGCT converter valve assembly.

[0081] In some embodiments, an integrated gate-commutated thyristor (IGCT) includes a plurality of gate-commutated thyristors (GCTs) and a plurality of drivers. The driver is used to drive the gate-commutated thyristor. The plurality of gate-commutated thyristors are arranged in a first direction, and one gate-commutated thyristor is arranged between two adjacent first heat sinks.

[0082] In some embodiments, the reference voltage and the protection level of the lightning protection device are selected according to the actual turn-off requirement. The average turn-off loss of the lightning protection device is calculated according to the maximum continuous turn-off level of the system, and the water cooling system parameters such as flow rate and flow resistance are designed accordingly. In order to ensure the consistency of the stray parameters (stray inductance and resistance of the conductive bar and the second heat sink) between the lightning protection device and the protected integrated gate-commutated thyristor, the thickness of the second heat sink is adjusted according to the actual height of the lightning protection device. The lightning protection device includes one or more arresters.

[0083] In the description of the present application, it should be understood that "a plurality of" means two or more. The orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0084] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0085] In addition, it should be noted that the use of "first", "second", and the like words to qualify parts is merely for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0086] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art based on the spirit and principles of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An IGCT converter valve assembly, characterized in that, include: Multiple integrated gate commutator thyristors (10) are arranged at intervals along a first direction; Multiple first heat sinks (20) are spaced apart, and an integrated gate commutator thyristor (10) is attached between two adjacent first heat sinks (20). The first heat sinks (20) and the integrated gate commutator thyristor (10) are electrically connected. Multiple lightning protection devices (30) are arranged at intervals along a second direction with multiple integrated gate commutator thyristors (10), and the second direction is arranged at an angle to the first direction. Multiple second heat sinks (40) are spaced apart, and a lightning protection device (30) is attached between two adjacent second heat sinks (40). The second heat sinks (40) and the lightning protection device (30) are electrically connected. A press-fit assembly for pressing together the plurality of said lightning arresters (30) and the plurality of the second heat sinks (40); Multiple conductive bars (50) electrically connect the first heat sink (20) and the second heat sink (40).

2. The IGCT converter valve assembly according to claim 1, characterized in that, The second heat sink (40) is a radiator, and a first heat dissipation channel is provided inside the radiator. The first heat dissipation channel has a coolant inlet (41) and a coolant outlet (42).

3. The IGCT converter valve assembly according to claim 2, characterized in that, The IGCT converter valve assembly also includes a first connecting pipe (60), through which the coolant outlet (42) of one of the two adjacent second heat sinks (40) is connected to the coolant inlet (41) of the other second heat sink (40).

4. The IGCT converter valve assembly according to claim 3, characterized in that, The IGCT converter valve assembly further includes a second connecting pipe. The first heat sink (20) is provided with a second heat dissipation channel. The second heat dissipation channels of multiple first heat sinks (20) are connected through the second connecting pipe. The second connecting pipe is arranged in parallel with the first connecting pipe (60).

5. The IGCT converter valve assembly according to claim 1, characterized in that, The second heat sink (40) is a heat-conducting block, which has a first plane and a second plane arranged opposite to each other. The first plane and the second plane are respectively attached to two adjacent lightning protection devices (30).

6. The IGCT converter valve assembly according to claim 1, characterized in that, The press-fit assembly includes a first upright plate, a second upright plate, and a screw. The first upright plate and the second upright plate are fixedly installed. A plurality of lightning protection devices (30) and a plurality of second heat sinks (40) are located between the first upright plate and the second upright plate. The first upright plate is provided with a threaded hole. The screw is threadedly engaged with the threaded hole. The screw abuts against the second heat sink (40) near the first upright plate.

7. The IGCT converter valve assembly according to claim 1, characterized in that, A positioning structure is provided between the lightning protection device (30) and its adjacent second heat sink (40). The positioning structure includes a positioning groove (321) and a positioning protrusion that positions and cooperates with the positioning groove (321). The positioning groove (321) is provided on one of the lightning protection device (30) and the second heat sink (40), and the positioning protrusion is provided on the other of the lightning protection device (30) and the second heat sink (40).

8. The IGCT converter valve assembly according to claim 7, characterized in that, The lightning protection device (30) includes a surge arrester (31), a conductive end cap (32), and an insulating cylinder (33). There are two conductive end caps (32), which are disposed on opposite sides of the surge arrester (31). The conductive end caps (32) are fitted to the second heat sink (40). The insulating cylinder (33) surrounds the outer periphery of the surge arrester (31).

9. The IGCT converter valve assembly according to claim 8, characterized in that, The positioning structure is disposed between the conductive end cap (32) and the adjacent second heat sink (40).

10. The IGCT converter valve assembly according to claim 8, characterized in that, The lightning protection device (30) also includes an insulating skirt (34), which surrounds the outer periphery of the insulating cylinder (33).

11. The IGCT converter valve assembly according to claim 10, characterized in that, The insulating skirt (34) is made of rubber material, and the insulating cylinder (33) is provided with a pressure relief groove (331). The insulating skirt (34) covers the outside of the pressure relief groove (331).

12. The IGCT converter valve assembly according to claim 1, characterized in that, A positioning structure is provided between the lightning protection device (30) and its adjacent second heat sink (40). The positioning structure includes a first positioning groove (35), a second positioning groove (43), and a positioning pin (44). The first positioning groove (35) is provided on the lightning protection device (30), the second positioning groove (43) is provided on the second heat sink (40), and the positioning pin (44) is provided in the first positioning groove (35) and the second positioning groove (43).

13. The IGCT converter valve assembly according to claim 1, characterized in that, Each of the lightning protection devices (30) includes a surge arrester (31), a plurality of first heat sinks (20) and a plurality of second heat sinks (40) are arranged in a one-to-one correspondence, and a plurality of conductive busbars (50) are connected in a one-to-one correspondence between the plurality of first heat sinks (20) and the plurality of second heat sinks (40).

14. The IGCT converter valve assembly according to claim 1, characterized in that, The lightning protection device (30) consists of m units, each of which includes n lightning arresters (31). The n lightning arresters (31) are fitted together and electrically connected. The second heat sink (40) consists of m+1 units.

15. The IGCT converter valve assembly according to claim 14, characterized in that, The integrated gate commutated thyristor (10) is The first heat sink (20) is one, and the first heat sink (20) is There are m+1 conductive busbars (50), and the m+1 conductive busbars (50) are arranged one-to-one with the m+1 second heat sinks (40). The second heat sinks (40) and the first heat sinks (20) corresponding to the second heat sinks (40) are electrically connected through one conductive busbar (50). The m and n are both positive integers.

16. The IGCT converter valve assembly according to claim 1, characterized in that, The first direction is perpendicular to the second direction.

Images