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CN203800578U - High-voltage direct-current circuit breaker - Google Patents

High-voltage direct-current circuit breaker Download PDF

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Publication number
CN203800578U
CN203800578U CN201420151014.9U CN201420151014U CN203800578U CN 203800578 U CN203800578 U CN 203800578U CN 201420151014 U CN201420151014 U CN 201420151014U CN 203800578 U CN203800578 U CN 203800578U
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China
Prior art keywords
circuit breaker
voltage
branch
capacitor
switch
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CN201420151014.9U
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Chinese (zh)
Inventor
潘垣
袁召
何俊佳
方帅
喻新林
尹小根
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for DC applications

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The utility model discloses a high-voltage direct-current circuit breaker. The high-voltage direct-current circuit breaker includes a current conversion branch, a main circuit breaker branch, a high-speed switch energy supply unit, a main loop reactor unit and a main loop disconnecting switch unit; the current conversion branch is an LC oscillation branch; an adjustable reactor and a plurality of high-speed switch energy absorbing and voltage equalizing modules are connected in series with each other so as to form the main circuit breaker branch; a high-speed switch, a lightning arrester and an RC voltage equalizing branch are connected in parallel with one another so as to form each high-speed switch energy absorbing and voltage equalizing module; the high-speed switch energy supply unit can ensure the quickness and cooperativity of the high-speed switches; the main loop reactor unit is used for decreasing the rise rate of failure current; and a main loop protection switch unit is used for protecting internal components after the circuit breaker is switched off successfully. Based a high-speed repulsion mechanism and an insulation transformer, the high-voltage direct-current circuit breaker has high switch-off speed, and can prevent the fault current from rising to large amplitude; and the high-voltage direct-current circuit breaker can withstand high voltage level, has high switch-off reliability and is simple in structure and low in cost.

Description

A kind of high voltage DC breaker
Technical field
The utility model belongs to AC network field, more specifically, relates to a kind of high voltage DC breaker.
Background technology
Based on voltage source converter (Voltage Source Converter, VSC) the high pressure (>=35kV) direct current network (High Voltage Direct Current Grid, HVDCG) of structure is considered to solve the grid-connected preferred plan with sending outside of extensive outlying wind farm group.The high-voltage direct current power grid of take is wind-powered electricity generation collects platform, has avoided intrinsic stability (voltage, frequency, the phase place etc.) problem of AC network, thus for wind-electricity integration provide flexible grid-connected may.But the new problem of bringing is the isolation of direct-current short circuit fault and the new technologies such as DC circuit breaker of excision short trouble, wherein especially the most key with DC circuit breaker.
When being short-circuited fault, the Low ESR of direct current system causes short circuit current to rise rapidly, therefore must guarantee that DC circuit breaker excises reliably short trouble within the short as far as possible time.Meanwhile, because DC circuit breaker needs to bear higher transient recovery voltage during drop-out current, must guarantee that main switch branch road meets insulating requirements.
In prior art, often adopt hydraulic pressure or pneumatic means to open main switch, operate time is slow, causes short circuit current to rise to excessive value, and circuit breaker is difficult to cut-off large electric current; When electric pressure is higher, the existing DC circuit breaker class of insulation cannot meet the demands, and cannot bear large voltage, bang easily occurs and wear.
Utility model content
For above defect or the Improvement requirement of prior art, the purpose of this utility model has been to provide a kind of high voltage DC breaker, has solved the problem that existing high voltage DC breaker is difficult to cut-off large electric current and bears large voltage.
The high voltage DC breaker that the utility model provides comprises main circuit breaker branch road, change of current branch road, high-speed switch supply unit, major loop reactor unit and major loop Disconnecting switch unit; Described major loop Disconnecting switch unit comprises the first isolating switch and the second isolating switch; Described main circuit breaker branch road comprises a plurality of high-speed switch energy-absorbing pressure modules that are connected in series successively and the Regulatable reactor of connecting with described high-speed switch energy-absorbing pressure module; One end of described Regulatable reactor is connected with described major loop reactor unit by described the first isolating switch, and the other end of described Regulatable reactor is connected with described high-speed switch energy-absorbing pressure module; Described change of current branch road is connected with described main circuit breaker branch circuit parallel connection; Described high-speed switch supply unit is connected with the feeder ear in a plurality of high-speed switch energy-absorbing pressure modules respectively, for power supply being provided to the high-speed switch operating mechanism of each high-speed switch energy-absorbing pressure module.
Wherein, described high-speed switch energy-absorbing pressure module comprises that high-speed switch K, the first lightning arrester MOV and the RC that are connected in parallel successively all press branch road; The first capacitor C that described RC all presses branch road to comprise to be connected in series successively 0with the first resistance R 0.
Wherein, described high-speed switch supply unit comprises a plurality of insulating transformers unit, and each insulating transformer unit comprises the iron core T of segmentation serial connection, is wrapped in a former limit winding on described iron core T and the secondary winding of a plurality of mutually insulateds; Described former limit winding is for being electrically connected to city, and a plurality of secondary windings are connected with the feeder ear in each high-speed switch energy-absorbing pressure module respectively.
Wherein, described insulating transformer unit also comprises the insulation framework G of full skirt shape structure, is positioned at the periphery of described iron core T.
Wherein, described major loop reactor unit comprises reactor L 3, the second resistance R 1, the first diode D 1, the second lightning arrester MOV 2, the 3rd resistance R 2, the second diode D 2with the second capacitor C 3; Described the first diode D 1negative electrode by described the second resistance R 1with described reactor L 3one end connect, described the first diode D 1anode and described reactor L 3the other end; Described the second lightning arrester MOV 2be connected in parallel on described reactor L 3two ends; Described the second diode D 2anode and described reactor L 3one end connect, described the second diode D 2negative electrode by described the second capacitor C 3ground connection; Described the 3rd resistance R 2with described the second diode D 2be connected in parallel.
Wherein, described change of current branch road comprises the first inductance L 1, the second inductance L 2, the 3rd capacitor C 1, the 4th capacitor C 2, transformer T 1, three electrode gap S gfill energy unit with commutation capacitor; Described three electrode gap S gfirst end by described the first inductance L 1be connected with the link of described main circuit breaker branch road with described the first isolating switch; Described three electrode gap S gthe second end by the second inductance L being connected in series successively 2with the 3rd capacitor C 1be connected with the link of described the second isolating switch with described main circuit breaker branch road; Described transformer T 1former limit be used for connecting civil power, described transformer T 1one end of secondary coil by described the 4th capacitor C 2with described three electrode gap S gthe 3rd end connect, described transformer T 1the other end ground connection of secondary coil; Commutation capacitor fill can unit for to described the 3rd capacitor C 1charging.
Wherein, described commutation capacitor fills and can comprise high-speed switch S in unit 3, the 4th resistance R 3with the 5th resistance R 4, described the 4th resistance R 3with described the 5th resistance R 4be connected in series in successively described the 3rd capacitor C 1month described the second inductance L 2link and ground between, described high-speed switch S 3with described the 4th resistance R 3be connected in parallel.
The utility model, by the series connection of many pack modules, can meet the requirement of different electric pressures flexibly.Each module is born identical voltage, by one or more transformers with mutually insulated secondary, to the operating mechanism of high-speed switch K, provides power supply.Due to the series connection of high-speed switch energy-absorbing pressure module, high-speed switch in modules is also connected in series, the contact of high-speed switch is all in high potential, and because insulating transformer adopts many group secondary structures, make the operating mechanism being connected with insulating transformer secondary also be in high potential, thereby greatly reduce the contact of high-speed switch K and the insulating requirements between operating mechanism, make DC circuit breaker can bear large voltage.
Accompanying drawing explanation
The theory diagram of the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 1 provides for the utility model;
The circuit diagram of high-speed switch energy-absorbing pressure module in the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 2 provides for the utility model;
The structure chart of insulating transformer in the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 3 provides for the utility model;
The schematic diagram of change of current branch road in the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 4 provides for the utility model;
The circuit diagram of major loop reactor unit in the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 5 provides for the utility model;
The physical circuit figure of the high voltage DC breaker based on rapid repulsion mechanism and insulating transformer that Fig. 6 provides for the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.In addition,, in each execution mode of described the utility model, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
In the utility model embodiment, rapid repulsion mechanism is the mechanical type high-speed switch based on electromagnetic repulsion force action.High-speed switch (Ultra-Fast Switch) mainly refers to that the switch motion time, in several milliseconds, is different from a few tens of milliseconds of traditional switch, because its responsiveness is far above traditional switch, therefore be called high-speed switch.
As shown in Figure 1, the high voltage DC breaker that the utility model provides comprises change of current branch road 2, main circuit breaker branch road 1, high-speed switch supply unit 3, major loop reactor unit 4 and major loop Disconnecting switch unit 5.Some high-speed switch energy-absorbing pressure modules 12 that main circuit breaker branch road 1 comprises Regulatable reactor 11 and connects with it, this main circuit breaker branch road 1 provides power supply by high-speed switch supply unit 3 to the high-speed switch operating mechanism in high-speed switch energy-absorbing pressure module 12.This main circuit breaker branch road 1 is in parallel with change of current branch road 2, then connects with major loop reactor unit 4 and major loop Disconnecting switch unit 5, forms the Modular HVDC breaker body structure based on rapid repulsion mechanism and insulating transformer.
Wherein, a plurality of high-speed switch energy-absorbing pressure module 12 series connection.As shown in Figure 2, each module all presses branch circuit parallel connection to form by a high-speed switch K, a lightning arrester MOV and a RC.High-speed switch K is the mechanical switch based on rapid repulsion mechanism, lightning arrester MOV is the Zinc-oxide piezoresistor for dissipation energy final drop-out current, RC in each module all presses branch road to be used for realizing all pressures between each high-speed switch energy-absorbing pressure module, thereby guarantee that single high-speed switch can arc reignition not occur because bearing overvoltage, causes failure of interruption.During normal operation, high-speed switch K is all in closing position, the line current high-speed switch K that only flows through.When short trouble generation being detected, high-speed switch K opens rapidly, and arcing occurs, due to the effect of change of current branch road oscillating current, and high-speed switch K generation current zero crossing, arc extinction; Now high-speed switch K two ends can produce larger transient recovery voltage, and in module, RC all presses branch road to play all pressure effects, prevent that the bang of single rapid repulsion K switch from wearing; When voltage rises to lightning arrester MOV clamp voltage, electric current is transferred to rapidly the lightning arrester MOV branch road in high-speed switch energy-absorbing pressure module, and the energy in circuit is absorbed by lightning arrester MOV, until electric current reduces to zero, completes and cut-offs.Because the magnitude of voltage that individual module bears is limited, therefore, by the series connection of many pack modules, can meet flexibly the requirement of different electric pressures.Each module is born identical voltage, by one or more transformers with mutually insulated secondary, to the operating mechanism of high-speed switch K, provides power supply.Due to the series connection of high-speed switch energy-absorbing pressure module, high-speed switch in modules is also connected in series, the contact of high-speed switch is all in high potential, and because insulating transformer adopts many group secondary structures, make the operating mechanism being connected with insulating transformer secondary also be in high potential, thereby greatly reduce the contact of high-speed switch K and the insulating requirements between operating mechanism, make DC circuit breaker can bear large voltage.
Wherein, the Regulatable reactor 11 with a plurality of high-speed switch energy-absorbing pressure modules 12 are connected, had both participated in producing LC reversing oscillating current, played again and suppressed the effect that fault current rises, and the fall off rate while simultaneously also having reduced current zero-crossing point, avoids arc reignition;
Wherein, as shown in Figure 3, high-speed switch supply unit 3 adopts one or more insulating transformers with mutually insulated secondary to provide power supply to each tandem tap operating mechanism.Insulating transformer is composed in series by the iron core T segmentation of insulating, and iron core outside puts insulation framework G again to increase creepage distance.Insulation framework can adopt the shapes such as insulator umbrella.Transformer secondary is wrapped in the middle of two strand insulation skeletons.
Wherein, as shown in Figure 4, change of current branch road 2 is LC vibration branch road, for generation of reverse current zero crossing extinguish arcs and for automatic reclosing, realizes quick-speed turning on-off.Commutation capacitor C 1from system power taking, be precharged to system voltage.Commutation capacitor C 1can adopt capable of charging in many ways to be precharged to system voltage, such as resistance grounded or the charging of employing transformer.
Wherein, change of current branch road 2 adopts three electrode gap S gconducting, passes through capacitor C 2protection charge circuit; The LC oscillation circuit of change of current branch road for adopting three electrode gaps to trigger.After short trouble being detected through certain time-delay, the automatic control transformer T of DC circuit breaker control system 1former square tube electricity, triggers three electrode gap S gconducting, commutation capacitor C 1with inductance L 1and L 2produce series resonance, for the blow-out of high-speed switch K provides reverse current.In addition inductance L, 1and L 2be distributed in three electrode gap S gboth sides, isolation three electrode gap S gtrigger voltage, avoids trigger voltage string to capacitor C 1or high-speed switch K.
Wherein, as shown in Figure 5, major loop reactor unit 4 is by reactor L 3, resistance R 1, diode D 1, lightning arrester MOV 2, resistance R 2, diode D 2and capacitor C 3form.This major loop reactor unit is by reactor L 3play the effect of the climbing that reduces fault current.When cut-offfing fault current, diode D 1and resistance R 1for reactor L 3the induced voltage producing provides discharge paths, prevents reactor L 3it is excessive that voltage is born at two ends; When fault current rises rapidly, lightning arrester MOV 2by voltage clamping protection reactor L 3, capacitor C 3, diode D 2and resistance R 2the loop forming is used for clamping down on reactor L 3left end current potential.
Wherein, major loop Disconnecting switch unit 5 comprises the first isolating switch 51 and the second isolating switch 52.Can adopt high-speed switch.In normal operation and failure on-off process, the first isolating switch 51 and the second isolating switch 52 are all in closure state.After circuit breaker cut-offs successfully, isolating switch is opened, protection DC circuit breaker inner member.
Compared with prior art, the beneficial effects of the utility model are: (1), by the series connection of a plurality of high-speed switch energy-absorbing pressure modules, can meet the DC circuit breaker requirement of different electric pressures neatly.(2) by adopting insulating transformer to provide power supply to the operating mechanism of high-speed switch, because operating mechanism is in high potential, greatly reduce the insulating requirements between contact and operating mechanism, guaranteed that rapid repulsion switch is reliable and moved simultaneously.
The Modular HVDC circuit breaker based on rapid repulsion mechanism and insulating transformer the utility model proposes adopts the direct current of active type transfer current to cut-off method, produces impressed current zero crossing drop-out current.
Modular HVDC circuit breaker in the present embodiment adopts the high voltage DC breaker that shown in accompanying drawing 6, a plurality of high-speed switch series connection form.
Each high-speed switch energy-absorbing pressure module in the present embodiment all presses branch circuit parallel connection to form by a high-speed switch K, a lightning arrester MOV and a RC.High-speed switch K is for adopting the high-speed switch based on rapid repulsion mechanism of insulating transformer isolation, lightning arrester MOV is the Zinc-oxide piezoresistor for dissipation energy final drop-out current, RC in each module all presses a route resistance R and capacitor C to be composed in series, for realizing all pressures between modules.During normal operation, high-speed switch K is all in closing position, the line current high-speed switch K that only flows through.When short trouble generation being detected, high-speed switch K opens rapidly, and arcing occurs, due to the effect of change of current branch road oscillating current, and high-speed switch K generation current zero crossing, arc extinction; Now high-speed switch K two ends can produce larger transient recovery voltage, and in module, RC branch road plays all pressure effects, prevent that the bang of single rapid repulsion switch from wearing; When voltage rises to lightning arrester MOV clamp voltage, electric current is transferred to rapidly lightning arrester MOV branch road, and the energy in circuit is absorbed by lightning arrester MOV, until electric current reduces to zero, completes and cut-offs.Because the magnitude of voltage that individual module bears is limited, therefore, by the series connection of many pack modules, can meet flexibly the requirement of different electric pressures.
High-speed switch supply unit in the present embodiment, as shown in Figure 4, mainly provides power supply by the transformer with a plurality of mutually insulated secondary to each tandem tap operating mechanism.Transformer is composed in series by the iron core segmentation of insulating, and insulation framework is added in iron core outside, to increase creepage distance.Insulation framework can adopt the shapes such as insulator umbrella.Transformer secondary is wrapped in the middle of two strand insulation skeletons.
The detailed process of this DC circuit breaker disjunction direct current is as follows:
(1) when circuit normally moves, high-speed switch K is all positioned at closing position, and electric current only circulates from main switch branch road; Switch S 3open capacitor C 1charge to system voltage;
(2) when being short-circuited fault, line current rises rapidly, and DC circuit breaker is opened eight high-speed switch K after fault current being detected immediately simultaneously, and arcing occurs;
(3) elapsed time t 1after time delay, by triggering three electrode gap S gconducting, capacitor C 1with inductance L, L 1and L 2series resonance produces oscillating current, and current transfer is to change of current branch road;
(4) capacitor C 1because fault current flows into constantly charging, when reaching lightning arrester MOV clamp voltage, lightning arrester MOV conducting, current transfer is to lightning arrester MOV;
(5) lightning arrester MOV constantly consumes line inductance and capacitor C 1the energy storing, until line current reduces to zero, completes and cut-offs, and now commutation capacitor fills and can move unit, switch S 3closure, commutation capacitor C 1charge to rapidly system voltage; Elapsed time t 2after, eight high-speed switch K of conducting again.If fault type is temporary fault, reclosing success; If fault type is nonvolatile fault, repeating step (3) (4), completes electric current and cut-offs.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims (7)

1.一种高压直流断路器，其特征在于，包括主断路器支路(1)、换流支路(2)、快速开关供能单元(3)、主回路电抗器单元(4)和主回路隔离开关单元(5)；1. A high-voltage DC circuit breaker, characterized in that it comprises a main circuit breaker branch (1), a commutation branch (2), a fast switch energy supply unit (3), a main loop reactor unit (4) and a main Circuit isolation switch unit (5); 所述主回路隔离开关单元(5)包括第一隔离开关(51)和第二隔离开关(52)；The main circuit isolating switch unit (5) includes a first isolating switch (51) and a second isolating switch (52); 所述主断路器支路(1)包括多个依次串联连接的快速开关吸能均压模块(12)以及与所述快速开关吸能均压模块(12)串联的可调电抗器(11)；所述可调电抗器(11)的一端通过所述第一隔离开关(51)与所述主回路电抗器单元(4)连接，所述可调电抗器(11)的另一端与所述快速开关吸能均压模块(12)连接；The main circuit breaker branch (1) includes a plurality of fast switch energy absorbing and voltage equalizing modules (12) connected in series sequentially and an adjustable reactor (11) connected in series with the fast switch energy absorbing and voltage equalizing modules (12) One end of the adjustable reactor (11) is connected with the main circuit reactor unit (4) through the first isolating switch (51), and the other end of the adjustable reactor (11) is connected with the The fast switch energy-absorbing pressure-equalizing module (12) is connected; 所述换流支路(2)与所述主断路器支路(1)并联连接；The commutation branch (2) is connected in parallel with the main circuit breaker branch (1); 所述快速开关供能单元(3)分别与多个快速开关吸能均压模块(12)中的供电端连接，用于给各个快速开关吸能均压模块(12)中的快速开关操动机构提供电源。The fast switch energy supply unit (3) is respectively connected to the power supply terminals in a plurality of fast switch energy absorbing and equalizing modules (12), and is used to operate the fast switches in each fast switch energy absorbing and equalizing module (12) Agency provides power. 2.如权利要求1所述的高压直流断路器，其特征在于，所述快速开关吸能均压模块(12)包括依次并联连接的快速开关K、第一避雷器MOV和RC均压支路；所述RC均压支路包括依次串联连接的第一电容C0和第一电阻R0。2. The high-voltage direct current circuit breaker as claimed in claim 1, characterized in that, the fast switch energy-absorbing voltage equalizing module (12) comprises fast switch K, first arrester MOV and RC voltage equalizing branch connected in parallel in turn; The RC equalizing branch includes a first capacitor C 0 and a first resistor R 0 connected in series in sequence. 3.如权利要求1所述的高压直流断路器，其特征在于，所述快速开关供能单元(3)包括多个绝缘变压器单元，每一个绝缘变压器单元包括分段串接的铁芯T，缠绕在所述铁芯T上的一个原边绕组以及多个相互绝缘的副边绕组；3. The high-voltage direct current circuit breaker as claimed in claim 1, characterized in that, the fast switch energy supply unit (3) comprises a plurality of insulating transformer units, and each insulating transformer unit comprises iron cores T connected in series in sections, a primary winding wound on the iron core T and a plurality of mutually insulated secondary windings; 所述原边绕组用于与市电连接，多个副边绕组分别与各个快速开关吸能均压模块(12)中的供电端连接。The primary winding is used to connect to the mains, and the multiple secondary windings are respectively connected to the power supply terminals in each fast switch energy absorbing and voltage equalizing module (12). 4.如权利要求3所述的高压直流断路器，其特征在于，所述绝缘变压器单元还包括伞裙状结构的绝缘骨架G，位于所述铁芯T的外围。4. The high voltage direct current circuit breaker according to claim 3, characterized in that, the insulating transformer unit further comprises an insulating skeleton G of a shed-shaped structure, located on the periphery of the iron core T. 5.如权利要求1所述的高压直流断路器，其特征在于，所述主回路电抗器单元(4)包括电抗器L3、第二电阻R1、第一二极管D1、第二避雷器MOV2、第三电阻R2、第二二极管D2和第二电容C3；5. The high voltage DC circuit breaker according to claim 1, characterized in that, the main circuit reactor unit (4) comprises a reactor L 3 , a second resistor R 1 , a first diode D 1 , a second Lightning arrester MOV 2 , third resistor R 2 , second diode D 2 and second capacitor C 3 ; 所述第一二极管D1的阴极通过所述第二电阻R1与所述电抗器L3的一端连接，所述第一二极管D1的阳极与所述电抗器L3的另一端；The cathode of the first diode D1 is connected to one end of the reactor L3 through the second resistor R1 , and the anode of the first diode D1 is connected to the other end of the reactor L3 . one end; 所述第二避雷器MOV2并联在所述电抗器L3的两端；The second lightning arrester MOV 2 is connected in parallel at both ends of the reactor L 3 ; 所述第二二极管D2的阳极与所述电抗器L3的一端连接，所述第二二极管D2的阴极通过所述第二电容C3接地；The anode of the second diode D2 is connected to one end of the reactor L3 , and the cathode of the second diode D2 is grounded through the second capacitor C3 ; 所述第三电阻R2与所述第二二极管D2并联连接。The third resistor R2 is connected in parallel with the second diode D2 . 6.如权利要求1所述的高压直流断路器，其特征在于，所述换流支路(2)包括第一电感L1、第二电感L2、第三电容C1、第四电容C2、变压器T1、三电极间隙Sg和换流电容充能单元；6. The high-voltage DC circuit breaker according to claim 1, characterized in that, the commutation branch (2) includes a first inductance L 1 , a second inductance L 2 , a third capacitor C 1 , and a fourth capacitor C 2. Transformer T 1 , three-electrode gap S g and the charging unit of the commutation capacitor; 所述三电极间隙Sg的第一端通过所述第一电感L1与所述第一隔离开关(51)与所述主断路器支路(1)的连接端连接；The first end of the three-electrode gap Sg is connected to the connecting end of the first isolating switch ( 51 ) and the main circuit breaker branch (1) through the first inductance L1; 所述三电极间隙Sg的第二端通过依次串联连接的第二电感L2和第三电容C1与所述主断路器支路(1)与所述第二隔离开关(52)的连接端连接；The second end of the three-electrode gap Sg is connected to the main circuit breaker branch (1) and the second isolating switch (52) through the second inductance L2 and the third capacitor C1 connected in series in sequence terminal connection; 所述变压器T1的原边用于连接市电，所述变压器T1的副边线圈的一端通过所述第四电容C2与所述三电极间隙Sg的第三端连接，所述变压器T1的副边线圈的另一端接地；The primary side of the transformer T1 is used to connect to the mains, and one end of the secondary coil of the transformer T1 is connected to the third end of the three-electrode gap Sg through the fourth capacitor C2 . The other end of the secondary coil of T 1 is grounded; 换流电容充能单元用于给所述第三电容C1充电。The converter capacitor charging unit is used to charge the third capacitor C1 . 7.如权利要求6所述的高压直流断路器，其特征在于，所述换流电容充能单元包括快速开关S3，第四电阻R3和第五电阻R4，7. The high-voltage DC circuit breaker according to claim 6, wherein the charging unit for the commutation capacitor comprises a fast switch S 3 , a fourth resistor R 3 and a fifth resistor R 4 , 所述第四电阻R3和所述第五电阻R4依次串联连接在所述第三电容C1月所述第二电感L2的连接端与地之间，The fourth resistor R3 and the fifth resistor R4 are sequentially connected in series between the third capacitor C1 , the connection terminal of the second inductor L2 and ground, 所述快速开关S3与所述第四电阻R3并联连接。The fast switch S3 is connected in parallel with the fourth resistor R3 .
CN201420151014.9U 2014-03-31 2014-03-31 High-voltage direct-current circuit breaker Expired - Fee Related CN203800578U (en)

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CN106253263A (en) * 2015-06-05 2016-12-21 通用电气公司 DC distribution and protection system
CN106487043A (en) * 2015-08-26 2017-03-08 国网智能电网研究院 A kind of hybrid integrated high-level energy supplying system for high voltage DC breaker
CN107203655A (en) * 2017-04-17 2017-09-26 全球能源互联网研究院 The numerical modeling method of mixed type dc circuit breaker
CN107919657A (en) * 2017-12-22 2018-04-17 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
CN108196177A (en) * 2017-12-26 2018-06-22 华北电力大学 A kind of semiconductor subassembly Performance Test System
CN115549028A (en) * 2022-09-27 2022-12-30 湖南工程学院 Series hybrid circuit breaker based on double-coupling inductor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106253263A (en) * 2015-06-05 2016-12-21 通用电气公司 DC distribution and protection system
CN106487043A (en) * 2015-08-26 2017-03-08 国网智能电网研究院 A kind of hybrid integrated high-level energy supplying system for high voltage DC breaker
CN107203655A (en) * 2017-04-17 2017-09-26 全球能源互联网研究院 The numerical modeling method of mixed type dc circuit breaker
CN107203655B (en) * 2017-04-17 2021-08-10 全球能源互联网研究院 Numerical modeling method of hybrid direct current breaker
CN107919657A (en) * 2017-12-22 2018-04-17 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
CN107919657B (en) * 2017-12-22 2023-08-15 清华四川能源互联网研究院 A valve tower structure of power electronic branch of ultra-high voltage DC circuit breaker
CN108196177A (en) * 2017-12-26 2018-06-22 华北电力大学 A kind of semiconductor subassembly Performance Test System
CN115549028A (en) * 2022-09-27 2022-12-30 湖南工程学院 Series hybrid circuit breaker based on double-coupling inductor

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