CN107919657B - Power electronic branch valve tower structure of ultrahigh voltage direct current breaker - Google Patents

Power electronic branch valve tower structure of ultrahigh voltage direct current breaker Download PDF

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Publication number
CN107919657B
CN107919657B CN201711401852.1A CN201711401852A CN107919657B CN 107919657 B CN107919657 B CN 107919657B CN 201711401852 A CN201711401852 A CN 201711401852A CN 107919657 B CN107919657 B CN 107919657B
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China
Prior art keywords
diode
igbt
power electronic
frame
electronic branch
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CN107919657A (en
Inventor
张英成
蔡放
白羽
刘斌
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Sichuan Energy Internet Research Institute EIRI Tsinghua University
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Sichuan Energy Internet Research Institute EIRI Tsinghua University
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    • 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • 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 provides a power electronic branch valve tower structure of an ultrahigh voltage direct current breaker, which comprises a plurality of layers of units, a supporting structure for supporting the layers of units and a high-voltage wire slot. Each layer of the valve tower is provided with a maintenance platform, so that when equipment fails, the problem is conveniently checked; the parts related to the valve string are integrated into a whole to form a unit, so that the whole auxiliary unit can be replaced when no time checking problem exists, and meanwhile, after a single independent auxiliary unit is detached, each part is checked one by one, thereby bringing great convenience for maintenance and repair and saving a lot of time.

Description

Power electronic branch valve tower structure of ultrahigh voltage direct current breaker
Technical Field
The invention relates to the technical field of ultra-high voltage direct current transmission, in particular to an ultra-high voltage direct current breaker power electronic branch valve tower structure.
Background
The flexible direct current transmission is the most advanced transmission technology at present, and since the first + -500 KV Ge Zhouba-ultra-high voltage direct current transmission line of China is built and put into operation in 1989, the flexible direct current transmission is a research hot spot in academic circles and is a high point preempted by power transmission and distribution companies worldwide. However, at present, since there is no dc breaker with high current breaking capability in the dc system, development of the uhv dc breaker is one of the key technologies for developing the dc power grid.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a novel multifunctional electric fan which is compact in structure and attractive in appearance. The distribution is reasonable. The structure adopts a laminated back-to-back structure, and all units and parts can be independently installed, detached and maintained.
In order to achieve the purpose, the invention provides a power electronic branch valve tower structure of an ultrahigh voltage direct current breaker, which comprises a plurality of layers of units, a supporting structure for supporting the layers of units and a high-voltage wire slot.
The supporting structure comprises a plurality of first supporting insulators, second supporting insulators and mounting cross beams arranged between the second supporting insulators. All of the first support insulators define a cube region. The same number of second support insulators are arranged above each first support insulator, and each second support insulator is connected in sequence by using a mounting cross beam. All the second supporting insulators are surrounded to form a cube region, and all the layers of subunits are positioned in the cube region surrounded by the second supporting insulators and are sequentially arranged in the vertical direction.
The mounting cross beam comprises an upper flange, a lower flange and a cross beam, wherein the cross beam is arranged at the bottom of the corresponding layer unit, and the end part of the cross beam is fixed between the upper flange and the lower flange; the upper flange is connected with the upper second supporting insulator, and the lower flange is connected with the lower second supporting insulator.
And the layer unit is provided with a plurality of power electronic branch units and a maintenance platform. The power electronic branch unit is structurally characterized by comprising a frame assembly, two PP-IGBT modules, two diode modules, 2/N RC buffer loop modules, a plurality of control board units, a frame, a plurality of driving boards and a driving power supply, wherein the two PP-IGBT modules, the two diode modules, the 2/N RC buffer loop modules, the plurality of control board units, the frame, the plurality of driving boards and the driving power supply are arranged in the frame assembly.
The frame assembly comprises two side frames and a cross beam positioned between the two side frames, wherein each side frame consists of a top frame and a bottom frame positioned below the top frame, and two ends of the cross beam are respectively fixed on one bottom frame. The top frame is positioned at the middle position on the top of the bottom frame, and the length of the top frame is shorter than that of the bottom frame. Each module is disposed within the frame.
The PP-IGBT module comprises N PP-IGBTs, 2N PP-IGBT radiators and N+1 insulators, wherein N is an integer. The PP-IGBT heat sinks are uniformly arranged in a row, and insulating pieces are arranged on the inner sides of the PP-IGBT heat sinks at the two ends. The PP-IGBT is arranged at intervals from one end to the other end of the PP-IGBT radiator row. Two ends of the PP-IGBT radiator row are respectively provided with a side pressing plate, at least one insulation pull rod is arranged between the two side pressing plates, and the insulation pull rod and the two side pressing plates are fixed into a whole. A top bolt is arranged between one end of the PP-IGBT radiator row and the adjacent side pressing plate, and the installation directions of the PP-IGBTs on two sides of each PP-IGBT radiator are opposite.
The diode module comprises M diodes and M+1 diode heat sinks, wherein M is an integer. Each diode radiator is evenly arranged in a row, diodes are arranged on the inner sides of the diode radiators at two ends, one diode is arranged on each of the two sides of each of the rest diode radiators, two side pressing plates are respectively arranged at two ends of each diode radiator row, at least one insulation pull rod is arranged between the two side pressing plates, and the insulation pull rods and the two side pressing plates are fixed into a whole. A top bolt is arranged between one end of the diode radiator array and the adjacent side pressing plate.
The two diode modules are respectively arranged at the upper end of the bottom frame along the length direction of the cross beam and are respectively positioned at the two ends of the top frame. The two PP-IGBT modules are arranged between the two top frames side by side along the length direction of the cross beam.
And a driving power supply mounting frame and a driving plate mounting frame are respectively arranged above the two diode modules and are respectively used for mounting driving power supplies and driving plates which are sequentially arranged.
The RC buffer circuit module comprises a plurality of capacitors and a plurality of resistors, wherein two ends of each capacitor are connected in series through copper bus bars, and each capacitor is connected in series through the copper bus bars;
the high-voltage wire grooves are provided with a plurality of high-voltage wire grooves, one end of each high-voltage wire groove is grounded, and the other end of each high-voltage wire groove is connected to the layer unit.
Further, the portion of the high-voltage wire groove located in the cubic area surrounded by the first supporting insulator is S-shaped.
Further, the support structure further comprises a diagonal insulator, the diagonal insulator is arranged between adjacent first support insulators on two opposite sides of the cube area surrounded by the first support insulators, one end of each diagonal insulator is connected with the top of one first support insulator, and the other end of each diagonal insulator is connected with the bottom of the other first support insulator.
Further, each power electronic branch unit is further provided with a first lightning arrester, and the first lightning arrester is connected with the diode radiator through a copper busbar.
Further, each layer unit is further provided with a plurality of second lightning arresters, and each power electronic branch unit is correspondingly provided with a second lightning arrester.
Further, the insulating pull rods of the PP-IGBT module and/or the diode module are provided with four, and a cube area is formed by surrounding the insulating pull rods, and the PP-IGBT module and/or the diode module are located in the cube area.
Further, in each power electronic branch unit, each pp-IGBT corresponds to four diodes in the diode module to form a diode bridge structure circuit; in the diode bridge structure circuit, each pp-IGBT source electrode and each pp-IGBT drain electrode are connected with one diode, and the source electrode is connected with the positive electrode of the diode, and the drain electrode is connected with the negative electrode of the diode; in the whole diode bridge structure circuit, the cathodes of two diodes connected with a source electrode are connected together, and the anodes of two diodes connected with a drain electrode are connected together; the individual diode bridge circuits are connected in series.
Further, each diode bridge structure circuit is connected in parallel with an RC buffer loop.
Further, each layer unit is provided with six power electronic branching units.
Compared with the prior art, the invention has the beneficial effects that:
1. structural design integration, integration of all modules, units and devices, and back-to-back lamination arrangement. The structure is more compact, reasonable and beautiful.
2. The function division is more clear, and all the auxiliary modules and units can be independently installed, detached and maintained. The time for installation and wiring is effectively saved.
3. Each layer of the valve tower is provided with a maintenance platform, so that when equipment fails, the problem is conveniently checked; the parts related to the valve string are integrated into a whole to form a unit, so that the whole auxiliary unit can be replaced when no time checking problem exists, and meanwhile, after a single independent auxiliary unit is detached, each part is checked one by one, thereby bringing great convenience for maintenance and repair and saving a lot of time.
Drawings
Fig. 1 is a front three-dimensional view of a power electronics branching unit.
Fig. 2 is a rear three-dimensional view of the power electronics branching unit.
Fig. 3 is a three-dimensional view of a frame assembly.
Fig. 4 is a three-dimensional view of a PP-IGBT module.
Fig. 5 is a three-dimensional view of a diode module.
Fig. 6 is a three-dimensional view of an RC snubber loop module.
Fig. 7 is a three-dimensional view of the left arrester unit.
Fig. 8 is a circuit diagram of a buffer branch topology of a diode bridge structure.
Fig. 9 is an overall schematic of the present invention.
Fig. 10 is a schematic view of a high voltage wire chase.
In the figure: 1. left arrester unit, 2, left diode module, 3, PP-IGBT module, 4, right diode module, 5, right arrester module, 6, RC snubber circuit module, 7, control board unit, 8, drive board, 9, drive power source, 10, PP-IGBT,11, PP-IGBT radiator, 12, insulator, 13, diode, 14, diode radiator, 15, capacitor, 16, resistor, 17, copper busbar, 18, arrester module, 19, diode bridge circuit, 20, snubber absorber circuit, 21, diode bridge buffer branch, 22, electronic branch unit, 23, second arrester, 24, mounting cross beam, 25, second support insulator, 26, first support insulator, 27, high voltage wire chase, 29, service platform.
Detailed Description
As shown in fig. 9, the power electronic branch valve tower structure of the uhd circuit breaker according to the present invention comprises a plurality of layer units, a support structure for supporting the layer units, and a high-voltage line tank 28.
The following description will be made separately.
1. Supporting structure
The support structure comprises a plurality of first support insulators 26, second support insulators 25 and a mounting cross beam 24 arranged between the second support insulators 25; all of the first support insulators 26 enclose a cubic area; the same number of second support insulators 25 are arranged above each first support insulator 26, and each second support insulator 25 is connected in sequence by a mounting cross beam 24; all the second supporting insulators 25 enclose a cubic area, and each layer of sub-units are positioned in the cubic area enclosed by the second supporting insulators 25 and are sequentially arranged in the vertical direction;
the mounting cross beam 24 comprises an upper flange, a lower flange and a cross beam, wherein the cross beam is arranged at the bottom of the corresponding layer unit, and the end part of the cross beam is fixed between the upper flange and the lower flange at the corresponding positions. Each upper flange is connected to an upper second support insulator and the lower flange is connected to a lower second support insulator 25. The cross beam may be made of an aluminum material.
Preferably, the supporting structure further comprises a diagonal supporting insulator 27, the diagonal supporting insulator 27 is arranged between adjacent first supporting insulators 26 on two opposite sides of the cube area surrounded by the first supporting insulators 26, one end of each diagonal supporting insulator 27 is connected with the top of one first supporting insulator 26, and the other end of each diagonal supporting insulator is connected with the bottom of the other first supporting insulator 26. Two diagonal support insulators 27 are arranged between two adjacent second support insulators 25 in a crossing way. The function of the diagonal support insulator 27 is to ensure transverse shear forces, making the valve tower more secure. And the valve tower is prevented from turning over due to vibration.
2. Layer unit
A number of power electronic branching units and a maintenance platform 29 are arranged on the layer unit. The following will describe each.
a. Power electronic branching unit
As shown in fig. 1 and 2, the power electronic branch unit of the uhv dc circuit breaker according to the present invention includes a frame assembly, two PP-IGBT modules 3 disposed in the frame assembly, two diode modules, a plurality of RC snubber circuit modules 6, a plurality of control board units 7, a frame assembly, a plurality of driving boards 8, and a driving power supply 9.
The respective portions are explained below.
a.1. Frame assembly
As shown in fig. 3, the frame assembly comprises two side frames and a cross beam positioned between the two side frames, wherein the side frames consist of a top frame and a bottom frame positioned below the top frame, and two ends of the cross beam are respectively fixed on one bottom frame; the top frame is positioned at the middle position on the top of the bottom frame, and the length of the top frame is shorter than that of the bottom frame. The function of the frame is to mount each module, and it can be seen from the figure that each module is disposed in the space surrounded by the side frames and the cross beam.
a.2. PP-IGBT module 3
As shown in fig. 4, the PP-IGBT module 3 includes N PP-IGBTs 10, 2N PP-IGBT heat sinks 11, and n+1 insulators 12, where N is an integer. In this embodiment, N is 22.
The PP-IGBT heat sinks 11 are uniformly arranged in a row, insulating pieces 12 are arranged on the inner sides of the PP-IGBT heat sinks 11 at two ends, and the PP-IGBT heat sinks 10 and the insulating pieces 12 are arranged at intervals from one end to the other end of the PP-IGBT heat sinks 11. The PP-IGBT radiator 11 not only plays a role in radiating heat of the PP-IGBT10 device, but also plays a role in conducting current. The PP-IGBTs 10 on both sides of each PP-IGBT radiator 11 are installed in opposite directions, being a group of PP-IGBTs 10.
Two ends of the row where the PP-IGBT radiator 11 is arranged are respectively provided with a side pressing plate, at least one insulation pull rod is arranged between the two side pressing plates, and the insulation pull rod is used for being fixed with the two side pressing plates into a whole so as to fix the PP-IGBT radiator 11 row between the two side pressing plates. A top bolt is arranged between one end of the PP-IGBT radiator 11 row and the adjacent side pressing plate, and at least one belleville spring is sleeved outside the top bolt (as shown in fig. 4). The top bolt is connected to the PP-IGBT module 3 through threads. When the valve string module device needs to be replaced, the whole pressure of the module can be removed by adjusting the position of the top bolt, and replacement and maintenance are carried out. When the module is installed again, the module can be pressed and assembled only by fastening the screw thread.
In this embodiment, the belleville springs have three. The belleville springs play a role in guaranteeing pressure after compression, and the conductive requirement of the PP-IGBT10 is guaranteed.
Further, four insulating tie rods are preferably provided, which enclose a cube area, and the column in which the PP-IGBT radiator 11 is located in the cube area. The insulating pull rod is fixed with the side pressing plate adjacent to the belleville spring through a nut bolt.
a.3. Diode module
As shown in fig. 5, the press-fitting valve string module structure of the uhd breaker diode 1 according to the present invention includes N diodes 13 and n+1 diode heat sinks 14, where N is an integer. The number of diodes in this embodiment is 22.
The diode heat sinks 14 are uniformly arranged in a row, one diode 13 is arranged on the inner side of each diode heat sink 14 at two ends, and one diode 13 is arranged on two sides of each other diode heat sink 14. The diode radiator 14 plays a role of not only radiating heat to the diode 13 but also conducting current.
Two ends of the diode radiator 14 row are respectively provided with a side pressing plate, and at least one insulation pull rod is arranged between the two side pressing plates and is used for being fixed with the two side pressing plates into a whole so as to fix the diode radiator 14 row between the two side pressing plates. A top bolt is arranged between one end of the diode radiator 14 row and the adjacent side pressing plate 3, and a butterfly spring is sleeved outside the top bolt. The top bolt is connected to the PP-IGBT module through threads. When the valve string module device needs to be replaced, the whole pressure of the module can be removed by adjusting the position of the top bolt, and replacement and maintenance are carried out. When the module is installed again, the module can be pressed and assembled only by fastening the screw thread.
In this embodiment, the belleville springs have three. The belleville spring plays a role in guaranteeing pressure after compressing, and guarantees the conductive requirement of the diode.
In the column direction of the diode heat sinks 14, the diodes are arranged in pairs, and the mounting directions of the diodes in each pair are opposite. Of course, the diode press-fitting direction can be changed according to the circuit of the extra-high voltage direct current breaker, and the installation direction of each group of diodes can be the same.
Further, four insulating ties are preferably provided, enclosing a cube region within which the array of diode heat sinks 14 are located. The insulating pull rod is fixed with the side pressing plate adjacent to the belleville spring through a nut bolt.
The two diode modules are respectively arranged at the upper end of the bottom frame along the length direction of the cross beam and are respectively positioned at the two ends of the top frame, namely a left diode module 2 and a right diode module 4 shown in figure 1; the two PP-IGBT modules 3 are arranged between the two top frames side by side along the length direction of the cross beam.
And a driving power supply 9 mounting frame and a driving plate 8 mounting frame are respectively arranged above the two diode modules and are respectively used for mounting the driving power supply 9 and the driving plates 8 which are sequentially arranged.
a.4. Drive power supply 9, drive board 8, control board unit 7
And a driving power supply 9 mounting frame and a control panel unit 7 mounting frame are respectively arranged above the two diode modules and are respectively used for mounting the driving power supply 9 and the control panel units 7 which are sequentially arranged. And a driving plate 8 mounting frame is arranged above the two diode modules and used for mounting driving plates 8 which are sequentially arranged. As can be seen from fig. 1, the two ends of each mounting frame are mounted on two side pressing plates of the module below the mounting frame, and a plurality of cross bars are sequentially arranged on the mounting frame, wherein the cross bars are used for mounting a driving power supply 9, a driving plate 8 and a control plate unit 7.
Every two PP-IGBTs 10 of the PP-IGBT module 3 and 4 diodes of the adjacent diode modules form a diode bridge structure circuit 19, and all the diode bridge structure circuits 19 are connected in series. The PP-IGBT module 3 and the diode module are connected through a copper busbar 17.
a.5. RC buffer circuit module 6
Each RC buffer circuit module 6 is arranged at the lower end of the PP-IGBT module 3 and is fixed on the beam. The space is effectively utilized in the structure, and the structure is more compact. The diode modules are placed in parallel with the RC buffer loop module 6. Therefore, the copper busbar structure not only can be convenient to install and detach, but also can reduce the connection distance of the copper busbar and reduce the material cost. The RC buffer circuit module 6 shown in fig. 6 is a three-dimensional diagram, and the RC buffer circuit is composed of a capacitor 15, a resistor 16 and a copper busbar 17. Wherein the capacitor 15 and the resistor 16 are connected in series to form a snubber circuit 20. The capacitor 15 and the resistor 16 are fixed on the upper copper busbar 17, and stray inductance can be reduced by the connection mode.
Further, the lightning protection device further comprises a first lightning arrester 18, wherein the first lightning arrester 18 is connected with the diode radiator 14 through the copper busbar 17, the number of the lightning arresters in the first lightning arrester 18 is N/2, and each lightning arrestor is respectively connected with an RC buffer loop in parallel. As shown in fig. 1, in this embodiment, the lightning arresters are divided into two groups, and are respectively disposed on the left and right sides of the unit, which are called a left lightning arrestor unit 1 and a right lightning arrestor unit 5. In each group, the individual lightning arresters are fixed by insulating beams (as shown in fig. 6). For example, the left lightning arrester unit 1 is provided with 6 lightning arrester units, and is formed by fixing 6 lightning arresters through insulating beams. The right arrester unit 5 is formed by fixing 5 arresters through an insulating beam. The first lightning arrester 18 is arranged beside the bottom frame along the length direction of the beam.
Further, each pp-IGBT corresponds to four diodes 13 in the diode module, forming a diode bridge structure circuit 19; in the diode bridge structure circuit 19, a source electrode and a drain electrode of each pp-IGBT10 are connected with one diode 13, the source electrode is connected with the positive electrode of the diode 13, and the drain electrode is connected with the negative electrode of the diode 13; in the whole diode bridge structure circuit 19, the cathodes of two diodes connected with the source electrode are connected together, and the anodes of two diodes connected with the drain electrode are connected together; the diode bridge circuits 19 are connected in series to form a diode bridge buffer branch 21.
In the present invention, each layer unit is provided with six power electronic units. The maintenance platform 29 is arranged in the middle of the layer unit, and three power electronic units are arranged on two sides of the maintenance platform.
Each layer unit is also provided with a plurality of second arresters 23, and each power electronic branch unit is correspondingly provided with a second arrestor 23.
The individual modules of the power electronics branching unit can be individually disassembled for maintenance.
b. Maintenance platform 29
The maintenance platform 29 can bear 400kg weight, and is convenient for maintenance personnel to overhaul, maintain and use.
3. High-voltage wire slot 28
As shown in fig. 10, the high-voltage line grooves 28 have a plurality of high-voltage line grooves 28, and one end of each high-voltage line groove 28 is grounded and the other end is connected to the layer unit.
The cables and fibers climb from below to the layer unit through the high voltage trunking 28. The portion of the high-voltage wire groove 28 located in the cubic region surrounded by the first support insulator 26 is S-shaped and S-shaped, so that the creepage distance can be effectively increased, and the use under the ultra-high voltage is ensured.

Claims (8)

1. The power electronic branch valve tower structure of the ultra-high voltage direct current breaker is characterized by comprising a plurality of layers of units, a supporting structure for supporting the layers of units and a high-voltage wire slot;
the support structure comprises a plurality of first support insulators, second support insulators and mounting cross beams arranged between the second support insulators; all the first supporting insulators enclose a cube area; the same number of second support insulators are arranged above each first support insulator, and each second support insulator is connected in sequence by using a mounting cross beam; all the second supporting insulators are surrounded to form a cube region, and all the layers of subunits are positioned in the cube region surrounded by the second supporting insulators and are sequentially arranged in the vertical direction;
the support structure further comprises inclined-pull support insulators, wherein inclined-pull support insulators are arranged between adjacent first support insulators on two opposite sides of a cube area surrounded by the first support insulators, one end of each inclined-pull support insulator is connected with the top of one first support insulator, and the other end of each inclined-pull support insulator is connected with the bottom of the other first support insulator; two oblique-pulling support insulators which are arranged in a crossing way are arranged between two adjacent second support insulators, and the oblique-pulling support insulators are used for guaranteeing transverse shearing force;
the mounting cross beam comprises an upper flange, a lower flange and a cross beam, wherein the cross beam is arranged at the bottom of the corresponding layer unit, and the end part of the cross beam is fixed between the upper flange and the lower flange; the upper flange is connected with the upper second supporting insulator, and the lower flange is connected with the lower second supporting insulator;
the layer unit is provided with a plurality of power electronic branch units and a maintenance platform; the structure of the power electronic branch unit is as follows; the device comprises a frame assembly, two PP-IGBT modules, two diode modules, a plurality of RC buffer loop modules, a plurality of control panel units, a frame, a plurality of driving boards and a driving power supply, wherein the two PP-IGBT modules, the two diode modules, the plurality of RC buffer loop modules, the plurality of control panel units, the frame, the plurality of driving boards and the driving power supply are arranged in the frame assembly;
the frame assembly comprises two side frames and a cross beam positioned between the two side frames, wherein the side frames consist of top frames and bottom frames positioned below the top frames, and two ends of the cross beam are respectively fixed on one bottom frame; the top frame is positioned at the middle position on the top of the bottom frame, and the length of the top frame is shorter than that of the bottom frame; each module is arranged in the frame;
the PP-IGBT module comprises N PP-IGBTs, 2N PP-IGBT radiators and N+1 insulating pieces, wherein N is an integer; the PP-IGBT radiators are uniformly arranged in a row, and insulating pieces are arranged on the inner sides of the PP-IGBT radiators at the two ends; the PP-IGBT and the insulating piece are arranged at intervals from one end to the other end of the PP-IGBT radiator row; two ends of the PP-IGBT radiator row are respectively provided with a side pressing plate, at least one insulation pull rod is arranged between the two side pressing plates, and the insulation pull rod and the two side pressing plates are fixed into a whole; a top bolt is arranged between one end of the PP-IGBT radiator row and the adjacent side pressing plate, and the installation directions of the PP-IGBTs on two sides of each PP-IGBT radiator are opposite;
the diode module comprises M diodes and M+1 diode radiators, wherein M is an integer; the diode radiator is uniformly arranged in a row, diodes are arranged on the inner sides of the diode radiators at two ends, one diode is arranged on two sides of each of the rest diode radiators, two side pressing plates are respectively arranged at two ends of the diode radiator row, at least one insulating pull rod is arranged between the two side pressing plates, and the insulating pull rod and the two side pressing plates are fixed into a whole; a top bolt is arranged between one end of the diode radiator array and the adjacent side pressing plate;
the two diode modules are respectively arranged at the upper end of the bottom frame along the length direction of the cross beam and are respectively positioned at the two ends of the top frame; the two PP-IGBT modules are arranged between the two top frames side by side along the length direction of the cross beam;
a driving power supply mounting frame and a driving board mounting frame are respectively arranged above the two diode modules and are respectively used for mounting driving power supplies and driving boards which are sequentially arranged;
the RC buffer circuit module comprises a plurality of capacitors and a plurality of resistors, wherein two ends of each capacitor are connected in series through copper bus bars, and each capacitor is connected in series through the copper bus bars;
the high-voltage wire grooves are provided with a plurality of high-voltage wire grooves, one end of each high-voltage wire groove is grounded, and the other end of each high-voltage wire groove is connected to the layer unit.
2. The uhd circuit breaker power electronic branch valve tower structure of claim 1, wherein the portion of the high voltage line tank located within the cubic area enclosed by the first support insulator is S-shaped.
3. The uhd circuit breaker power electronic branch valve tower structure of claim 1, wherein each power electronic branch unit is further provided with a first lightning arrester, said first lightning arrester being connected with a diode radiator through a copper busbar.
4. The structure of the power electronic branch valve tower of the ultra-high voltage direct current breaker according to claim 1, wherein each layer unit is further provided with a plurality of second lightning arresters, and each power electronic branch unit is correspondingly provided with a second lightning arrester.
5. The uhd circuit breaker power electronic branch valve tower structure of claim 1, wherein the PP-IGBT module and/or the diode module has four insulated pull rods enclosing a cube area, and the PP-IGBT module and/or the diode module are located in the cube area.
6. The uhd circuit breaker power electronic branch valve tower structure of claim 1, wherein each PP-IGBT group corresponds to four diodes in the diode module in each power electronic branch unit, forming a diode bridge structure circuit; in the diode bridge type structure circuit, each PP-IGBT source electrode and each PP-IGBT drain electrode are connected with one diode, the source electrode is connected with the positive electrode of the diode, and the drain electrode is connected with the negative electrode of the diode; in the whole diode bridge structure circuit, the cathodes of two diodes connected with a source electrode are connected together, and the anodes of two diodes connected with a drain electrode are connected together; the individual diode bridge circuits are connected in series.
7. The uhd circuit breaker power electronic branch valve tower structure of claim 6, wherein each diode bridge structure circuit is connected in parallel with an RC snubber circuit.
8. The uhd circuit breaker power electronic branch valve tower structure of claim 1, wherein each layer unit is provided with six power electronic branch units.
CN201711401852.1A 2017-12-22 2017-12-22 Power electronic branch valve tower structure of ultrahigh voltage direct current breaker Active CN107919657B (en)

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CN108768184B (en) * 2018-04-23 2021-01-22 北京平高清大科技发展有限公司 Switch power unit and high-voltage direct-current circuit breaker
CN113488347A (en) * 2021-07-30 2021-10-08 北京电力设备总厂有限公司 Power electronic switch group of direct current breaker
CN114336478B (en) * 2022-03-09 2022-05-17 欧米勒电气有限公司 High-voltage direct-current breaker valve tower structure and using method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203800578U (en) * 2014-03-31 2014-08-27 华中科技大学 High-voltage direct-current circuit breaker
CN106558864A (en) * 2015-09-25 2017-04-05 国网智能电网研究院 A kind of hybrid Fast DC Circuit Breaker
CN106611679A (en) * 2015-10-23 2017-05-03 国网智能电网研究院 Full-bridge cascaded high-voltage DC circuit breaker valve module
CN207588444U (en) * 2017-12-22 2018-07-06 清华四川能源互联网研究院 A kind of superhigh voltage DC breaker power electronics bypass valve tower structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8847701B2 (en) * 2008-10-31 2014-09-30 Ace Technologies Corporation Miniaturized DC breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203800578U (en) * 2014-03-31 2014-08-27 华中科技大学 High-voltage direct-current circuit breaker
CN106558864A (en) * 2015-09-25 2017-04-05 国网智能电网研究院 A kind of hybrid Fast DC Circuit Breaker
CN106611679A (en) * 2015-10-23 2017-05-03 国网智能电网研究院 Full-bridge cascaded high-voltage DC circuit breaker valve module
CN207588444U (en) * 2017-12-22 2018-07-06 清华四川能源互联网研究院 A kind of superhigh voltage DC breaker power electronics bypass valve tower structure

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