CN107833783A - The powder operation device and its actuating method of a kind of dc circuit breaker - Google Patents

Abstract

Disclosed is an operating device and an operating method for a DC circuit breaker. The operating device includes a vacuum bubble, a repulsion mechanism, and an electromagnetic mechanism connected to the repulsion mechanism via a connecting rod. The vacuum bubble is provided with a static contact A mechanical contact composed of a moving contact, the moving contact is connected to a repulsion mechanism through an insulating pull rod, and the repulsion mechanism includes an opening coil, a repulsion disk, a charging and discharging circuit, and a first device for controlling the charging and discharging circuit to trigger the opening operation. A controller, the repulsion disk is connected to the connecting rod via a moving guide rod, the opening coil is located above the repulsion disk with a gap not greater than 3.5mm; the electromagnetic mechanism includes an annular hollow static iron core, a moving iron core, a suction coil, Holding coil, opening return spring, contact spring and second controller.

Description

An operating device and operating method for a DC circuit breaker

technical field

The invention relates to the field of a DC circuit breaker, in particular to an operating device and an operating method for a DC circuit breaker.

Background technique

Due to the low cost of the DC system, no capacitive current, no eddy current loss, and easier control of the power flow, the DC HVDC transmission system has attracted much attention. Especially in some specific occasions, such as large-scale ship power supply system, urban rail transit power supply system and other DC systems have been greatly developed. At the same time, with the continuous increase of the capacity of the DC system and the continuous improvement of the voltage level, the peak value of the short-circuit current can reach more than 100kA, and the rate of increase of the short-circuit current is also more than 15A/us.

Patent document CN201156495Y discloses an operating mechanism in a circuit breaker comprising an electromagnetic repulsion driving mechanism and a bistable combined disc spring holding mechanism; the electromagnetic repulsion driving mechanism includes two discharge circuits, which are respectively connected to the two discharge circuits The opening coil and the closing coil are arranged on the upper and lower support plates. There is a gap between the opening coil and the closing coil through bolts, and they are connected into one body. A repelling plate is arranged in the gap. A repelling rod is fixedly pierced on the repelling plate, and the upper and lower ends of the repelling rod slide through the opening coil and closing coil respectively, and the opening coil is exposed at the upper end of the repelling rod The position corresponds to a photoelectric sensor, and a sensor shading plate is set; the bistable combined disc spring holding mechanism includes a holding force rod, the upper end of which is connected to the lower end of the repelling rod, and the holding force rod is fixedly provided with A plurality of spring stops, on which at least two disc springs are arranged oppositely, the periphery of the disc springs is fixedly connected to a plurality of long studs, and the tops of the long studs are fixedly connected to the lower support plate. The structure of this patent is simple, the moving mass and impact kinetic energy of the bistable combined disc spring are small, and the design of the output characteristics is simple, but this patent cannot realize the rated opening and closing. Under the premise of these functions, the rated opening and closing life is high, and the fast opening and closing movable parts have small mass and high speed, which improves the service life of the DC circuit breaker and reduces the closing speed.

A kind of fast switch based on the permanent magnet holding mechanism disclosed in the patent document CN205723330U includes an upper guide rod (1), a vacuum interrupter (2), a middle guide rod, an insulator (3), a lower guide rod (4) and Keeping the moving iron core (9), the repulsion disk (6) is set on the lower guide rod (4), the opening coil (5) is installed above the repulsion disk (6), and the closing coil (5) is installed below it. Brake coil (7); a static iron core for upper maintenance is installed above the moving iron core (9) for maintenance, and a closing permanent magnet (11) is installed in the middle of the static iron core for maintenance. The lower holding static iron core is installed below the moving iron core (9), and the opening and holding permanent magnet (14) is installed in the middle of the lower holding static iron core. This patent is based on the fast repulsion switch held by permanent magnets, which can effectively increase the opening speed of the switch, but the patent cannot achieve rated opening and closing. At the same time, it can quickly open when the short-circuit fault current arrives, and on the premise of realizing the two functions, Realize long service life of rated opening and closing, fast opening and moving parts with small mass and high speed, improve the service life of DC circuit breaker and reduce closing speed.

The current fast operating mechanism is difficult to meet the life requirements of rated opening and closing on the basis of realizing fast opening and closing. In some occasions that require frequent on-off, it cannot be well compatible with the requirements of high rated opening and closing life and fast opening and closing speed.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide an operating device that can meet the requirements of fast opening speed and long rated opening and closing life.

The purpose of the present invention is to be achieved through the following technical solutions.

In one aspect of the present invention, an operating device for a DC circuit breaker includes a vacuum bubble, a repulsion mechanism, and an electromagnetic mechanism connected to the repulsion mechanism via a connecting rod.

The vacuum bubble is provided with a mechanical contact composed of a static contact and a moving contact. The moving contact is connected to a repulsion mechanism through an insulating pull rod. The charging and discharging circuit triggers the first controller of the opening operation, the repulsion disk is connected to the connecting rod via the moving guide rod, and the opening coil is located above the repulsion disk with a gap not greater than 3.5mm.

The electromagnetic mechanism includes an annular hollow static iron core, a moving iron core, a suction coil, a holding coil, a switch-off return spring, a contact spring and a second controller, and the suction coil and the holding coil are arranged in the static iron core , the connecting rod passes through the hollow part of the static iron core, the moving iron core is located below the static iron core, and the moving guide rod connected to the connecting rod passes through the hollow part of the static iron core and is connected with the repulsion plate and the moving iron core respectively , the moving guide rod is surrounded by a contact spring and an opening return spring, and the end of the opening return spring is against the moving iron core.

When the operating device receives the closing command, the second controller controls the suction coil and the holding coil to be energized so that the moving iron core first overcomes the elastic force of the opening return spring and then simultaneously overcomes the elastic force of the opening return spring and the contact spring. When the operating device is in the closing position, the second controller controls the suction and coil to de-energize and keeps the coil energized so that the moving iron core and the static iron core are stably kept in the suction and state to stably compress the contact spring.

When the operating device receives the opening command, the second controller controls the holding coil to be de-energized and the suction coil is reversely energized, and the moving iron core first moves downward under the joint action of the contact spring and the opening reset spring. Then, under the action of the opening return spring alone, the opening operation is realized by moving downward, and when the operating device is in the opening position, the opening return spring keeps the opening.

In the operating device of the DC circuit breaker, when the operating device receives a quick opening command, the first controller controls the opening coil to discharge, and the repulsion disc drives the connecting rod to realize quick breaking.

In the operating device of the DC circuit breaker, the charging and discharging circuit is composed of a driving capacitor with pre-charging, a thyristor, and a coil connected in series, and freewheeling diodes are connected in reverse parallel at both ends of the coil.

In the operating device of the DC circuit breaker, the operating device is provided with a buffer device under the electromagnetic mechanism. When the operating device is in the opening position, the opening return spring and the buffer device keep the brake open. The buffer device includes Oil buffer, damping buffer or spring buffer.

In the operating device of the DC circuit breaker, when the operating device receives a switch-on instruction, the second controller uses a capacitor to energize the absorber and the coil.

In the operating device of the DC circuit breaker, the repulsion disk is in a circular or annular shape that generates eddy current, and the repulsion disk is made of copper or aluminum alloy conductive material.

In the operating device of the DC circuit breaker, the cross-sectional shapes of the static iron core include U-shape, E-shape and solenoid shape, and the static iron core is made of magnetically conductive material.

In the operating device of the DC circuit breaker, the holding coil is connected in series with a resistor, the opening return spring has a predetermined pre-compression amount, the opening coil includes a disc coil, and the material of the moving guide rod is a non-magnetic material.

In the operating device of the DC circuit breaker, the repulsion mechanism and the electromagnetic mechanism are separated by insulating parts, and the pre-compression amount and elastic coefficient of the contact spring are larger than the opening return spring.

According to another aspect of the present invention, the steps of an operating method using the operating device of the DC circuit breaker include:

The operating device receives the closing command, and the second controller controls the suction coil and the holding coil to energize so that the moving iron core first overcomes the elastic force of the opening reset spring and then simultaneously overcomes the elastic forces of the opening reset spring and the contact spring to move upward, When the operating device is in the closing position, the second controller controls the suction coil to be de-energized and keeps the coil energized so that the moving iron core and the static iron core are stably kept in the suction state to stably compress the contact spring.

The operating device receives the opening command, the second controller controls the holding coil to be de-energized and the suction coil is energized in reverse, the moving iron core first moves downward under the joint action of the contact spring and the opening reset spring, and then The opening return spring moves downwards alone to realize the opening operation, and when the operating device is in the opening position, the opening return spring and the buffer device keep opening.

The operating device receives a quick opening command, the first controller controls the opening coil to discharge, and the repulsion disc drives the connecting rod to realize quick opening.

The invention provides an operating device with simple structure and easy manipulation, which can realize high rated opening and closing service life, fast opening and closing movable parts with small mass and high speed, which can increase the service life of the DC circuit breaker and reduce the closing speed. The operating device achieves a high rated opening and closing life, and at the same time, it can quickly open when the short-circuit fault current arrives. The suction force of this structure is provided by the electromagnet, and the stable and low collision speed suction is realized by reasonably setting the contact spring and the opening return spring; when the operating device is in the holding position, it uses The suction and retention forces compress the contact springs to provide final contact pressure. When the rated opening occurs, the coil is powered off, and the moving iron core realizes opening under the action of the opening reset spring and the contact spring. When the short-circuit current comes and needs to be opened quickly, the opening coil is discharged through the capacitor, and the eddy current is induced in the repulsive disk, and a strong electromagnetic repulsion is generated between the coil and the metal disk, thereby driving the connecting rod to move and realizing the rapid opening of the switch. The operating device realizes the functions of rated opening and closing and quick opening.

The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer, to the extent that those skilled in the art can implement it according to the contents of the description, and to enable the above and other purposes of the present invention, The features and advantages can be more obvious and understandable, and the specific implementation manners of the present invention are illustrated below for illustration.

Description of drawings

Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings in the description are for the purpose of illustrating preferred embodiments only and are not to be considered as limiting the invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. Also throughout the drawings, the same reference numerals are used to denote the same parts.

In the attached picture:

Fig. 1 is a structural schematic diagram of an operating device of a DC circuit breaker in an opening position according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the operating device of the DC circuit breaker in the closing position according to an embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the repulsion mechanism of the operating device of the DC circuit breaker according to an embodiment of the present invention;

4 is a schematic diagram of the steps of the operating method using the operating device of the DC circuit breaker according to an embodiment of the present invention;

Among them, 1 is the high-speed repulsion mechanism, 2 is the electromagnetic mechanism, 3 is the mechanical contact, 4 is the insulating rod, 5 is the opening coil, 6 is the repulsion plate, 7 is the static iron core, 8 is the contact spring, 9 is the branch Brake return spring, 10 is connecting rod, and 11 is suction and coil, and 12 is to keep coil, and 13 is moving iron core, and 14 is buffer, and 15 is static contact, and 16 is moving contact.

The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". The subsequent description in the specification is a preferred implementation mode for implementing the present invention, but the description is for the purpose of the general principles of the specification, and is not intended to limit the scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

In order to facilitate the understanding of the embodiments of the present invention, further explanations will be given below in conjunction with the accompanying drawings by taking specific embodiments as examples, and each drawing does not constitute a limitation to the embodiments of the present invention.

For a better understanding, Fig. 1 is a structural schematic diagram of the operating device of the DC circuit breaker in the opening position according to an embodiment of the present invention. The operating device of the DC circuit breaker includes a vacuum bubble, a repulsion mechanism 1 and a connecting rod 10 is connected to the electromagnetic mechanism 2 of the repulsion mechanism 1 .

The vacuum bubble is provided with a mechanical contact 3 composed of a static contact 15 and a moving contact 16. The moving contact 16 is connected to a repulsion mechanism 1 via an insulating pull rod 4. The repulsion mechanism 1 includes a switch coil 5, The repulsion disk 6, the charge and discharge circuit and the first controller that controls the charge and discharge circuit to trigger the opening operation, the repulsion disk 6 is connected to the connecting rod 10 via the moving guide rod, the opening coil 5 is located above the repulsion disk 6 and the gap is large Greater than 3.5mm.

The electromagnetic mechanism 2 includes an annular hollow static iron core 7, a moving iron core 13, a suction coil 11, a holding coil 12, an opening return spring 9, a contact spring 8 and a second controller, and the static iron core 7 The suction coil 11 and the holding coil 12 are arranged inside, the connecting rod 10 passes through the hollow part of the static iron core 7, the moving iron core 13 is located below the static iron core 7, and the moving guide rod connected to the connecting rod 10 passes through The hollow part of the static iron core 7 is connected with the repulsion plate 6 and the moving iron core 13 respectively, and the moving guide rod is surrounded by a contact spring 8 and a switch-opening return spring 9, and the end of the opening return spring 9 is against the moving iron core 13 on.

When the operating device receives the closing command, the second controller controls the suction coil 11 and the holding coil 12 to be energized so that the moving iron core 13 first overcomes the elastic force of the opening reset spring 9 and then simultaneously overcomes the opening reset spring 9 and the contactor. The elastic force of the head spring 8 moves upwards. When the operating device is in the closing position, the second controller controls the suction and coil 11 to be de-energized and keeps the coil 12 energized so that the moving iron core 13 and the static iron core 7 are stably maintained at the suction position. And state to stably compress the contact spring 8.

In one embodiment, referring to FIG. 1 , in the opening state, after receiving the closing command, the capacitor discharges the suction and coil 11, the static iron core 7 is magnetized, and the moving iron core 13 overcomes the reaction force under the action of the electromagnetic suction to drive the connecting coil 11. The rod 10 moves upwards while the holding coil 12 becomes energized. In the suction process, the moving iron core 13 overcomes the reaction force of the two springs. Further, the opening return spring 9 has a certain amount of pre-compression, and continues to compress as the stroke of the moving and static iron core decreases.

Furthermore, in order to achieve the purpose that the static and dynamic iron core can quickly absorb and absorb and the collision speed should not be too high, and at the same time provide a stable holding force in the absorb and position, the contact spring 8 has a larger compression amount and a higher With a large elastic coefficient, the contact spring 8 moves with the moving iron core 13 in the first section of the stroke without compression. When the air gap of the dynamic and static iron core is small and the electromagnetic attraction force is large, the contact spring starts to act. After the foundation of the dynamic and static contacts, the dynamic and static iron core still has some overtravel, and the contact spring 8 continues to compress until the dynamic and static iron core is completely absorbed. , The contact spring 8 provides the final pressure of the contact. Simultaneously, the retaining force between the moving and static iron cores can be greater than the resultant force of the contact spring 8 and the switch-off reset spring 9, with a margin.

Furthermore, in order to avoid reverse current induced in the holding coil 12 by the rapidly rising current of the suction coil 11 during the suction, a diode is connected in series in the loop of the holding coil 12 .

When the operating device receives the opening command, the second controller controls the holding coil 12 to be de-energized and the suction coil 11 is energized in reverse, and the moving iron core 13 first acts together on the contact spring 8 and the opening reset spring 9. It moves downwards and then moves downwards under the action of the opening return spring 9 alone to realize the opening operation. When the operating device is in the opening position, the opening return spring 9 keeps opening.

In one embodiment, referring to FIG. 2 , the present invention is in the closing state, and after receiving the opening command, the holding coil 12 is powered off. Through the reverse energization of the suction and coil 11 to demagnetize or the holding coil 12 to quickly dissipate energy through the freewheeling circuit, the moving iron core 13 drives the connecting rod 10 to move downward under the action of the contact spring 8 and the opening return spring 9, so that the dynamic and static Contact separation.

In the preferred embodiment of the operating device of the DC circuit breaker, when the operating device receives a quick opening command, the first controller controls the opening coil 5 to discharge, and the repulsive disc 6 drives the connecting rod to realize quick opening. broken.

In one embodiment, referring to FIG. 3 , the operating device is in the closing state. When the short-circuit current arrives, the pre-charged capacitor discharges to the opening coil 5 such as a disc coil, generating a pulse current that lasts for several milliseconds. Under the action of the pulse current, an eddy current will be induced in the repulsion disk 6, and a strong electromagnetic repulsion will be generated between the opening coil 5 and the metal disk, thereby driving the connecting rod 10 to move, and realizing the rapid breaking of the switch.

The invention has the advantages of realizing the fast opening function when the short-circuit current arrives, and the moving parts have small mass and high speed when opening. The electromagnet is used under the rated opening and closing and maintaining conditions, and the opening and closing life is high, stable and reliable. In order to realize stable and reliable suction and avoid high collision speed, the present invention starts to compress the contact spring when the air gap of the moving iron core is small. At this time, the air gap is small and the electromagnetic attraction is large, which can overcome the reaction force of the contact spring. At the same time, the contact spring 8 has a large pre-compression amount and a large elastic coefficient, which can provide a good buffering effect.

In a preferred embodiment of the operating device of the DC circuit breaker, the charging and discharging circuit is composed of a driving capacitor with pre-charging, a thyristor, and a coil connected in series, and freewheeling diodes are connected in antiparallel to both ends of the coil.

In the preferred embodiment of the operating device of the DC circuit breaker, the operating device is provided with a buffer device 14 under the electromagnetic mechanism 2. When the operating device is in the opening position, the opening return spring 9 The buffer device 8 is kept open, and the buffer device 14 includes an oil buffer, a damping buffer or a spring buffer.

In a preferred embodiment of the operating device of the DC circuit breaker, when the operating device receives a closing command, the second controller uses a capacitor to energize the suction coil 11 .

In a preferred embodiment of the operating device of the DC circuit breaker, the repulsion disk 6 is in a circular or annular shape that generates eddy current, and the repulsion disk 6 is made of copper or aluminum alloy conductive material.

In a preferred embodiment of the operating device of the DC circuit breaker, the cross-sectional shape of the static iron core 7 includes a U shape, an E shape or a solenoid shape, and the static iron core 7 is made of a magnetically conductive material.

In the preferred embodiment of the operating device of the DC circuit breaker, the holding coil 12 is connected in series with a resistor, the opening reset spring 9 has a predetermined pre-compression amount, the opening coil 5 includes a disc coil, and the moving The material of the guide rod is a non-magnetic material.

In the preferred embodiment of the operating device of the DC circuit breaker, the repulsion mechanism 1 and the electromagnetic mechanism 2 are separated by insulating parts, and the precompression and elastic coefficient of the contact spring 8 are larger than the opening return spring 9.

In the preferred embodiment of the operating device of the DC circuit breaker, the insulating pull rod 4 and the vacuum bubbling end are connected by threads, and the opening coil 5 is fixed on the insulating plate by bolts;

In the preferred embodiment of the operating device of the DC circuit breaker, the upper part of the connecting rod 10 is connected with a repulsion disk 6, and the repulsion disk 6 is close to the opening coil 5; at the uppermost end of the connecting rod 10 Connected with moving contact 16 and stretched in the vacuum bubble.

In the preferred embodiment of the operating device of the DC circuit breaker, the current of the pull-in and pull-in coil 11 is not too high during the closing process, and the collision speed is not too high, and the capacitor is used to discharge the pull-in and pull-in coil 11 .

Preferably, in order to ensure that the temperature rise of the coil 12 meets the requirements for closing, the wire diameter and the number of turns are reasonably selected, and a resistor can be connected in series to reduce the power consumption of the coil.

Fig. 4 is a schematic diagram of the steps of the operating method using the operating device of the DC circuit breaker according to an embodiment of the present invention. The steps of the operating method using the operating device of the DC circuit breaker include:

The operating device receives the closing command, and the second controller controls the suction coil 11 and the holding coil 12 to energize so that the moving iron core 13 first overcomes the elastic force of the opening reset spring 9 and then simultaneously overcomes the opening reset spring 9 and the contact spring The elastic force of 8 moves upward. When the operating device is in the closing position, the second controller controls the suction and coil 11 to be de-energized and keeps the coil 12 energized so that the moving iron core 13 and the static iron core 7 are stably maintained in the suction and state. To stabilize the compression contact spring 8.

The operating device receives the opening command, the second controller controls the holding coil 12 to be de-energized and the suction coil 11 is reversely energized, and the moving iron core 13 first moves downward under the joint action of the contact spring 8 and the opening reset spring 9. Moving down and then moving down under the action of the opening return spring 9 alone to realize the opening operation. When the operating device is in the opening position, the opening return spring 9 and the buffer device 14 keep opening.

The operating device receives a quick opening command, the first controller controls the opening coil 5 to discharge, and the repulsive disc 6 drives the connecting rod 10 to realize quick opening.

Although the embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not restrictive . Under the enlightenment of this description and without departing from the protection scope of the claims of the present invention, those skilled in the art can also make many forms, which all belong to the protection of the present invention.

Claims (10)

1. a kind of powder operation device of dc circuit breaker, it includes vacuum bubbles, repulsive force mechanism (1) and via described in connecting rod (10) connection The electromagnetic mechanism (2) of repulsive force mechanism (1), it is characterised in that：

The mechanical contact (3) being made up of static contact (15) and moving contact (16), the moving contact (16) are provided with the vacuum bubbles Via insulated tension pole (4) connection repulsive force mechanism (1), the repulsive force mechanism (1) includes switching winding (5), repulsion dish (6), charge and discharge Electrical circuit and the first controller for controlling the charging and discharging circuit triggering sub-switching operation, the repulsion dish (6) connect via dynamic guide rod Connective pole (10), switching winding (5) is located above repulsion dish (6) and gap is not more than 3.5mm；

The electromagnetic mechanism (2) includes static iron core (7), dynamic iron core (13), suction and coil (11), the hold-in winding of annular hollow (12), separating brake back-moving spring (9), touch spring (8) and second controller, interior set of the static iron core (7) are inhaled and coil (11) With hold-in winding (12), connecting rod (10) passes through static iron core (7) hollow space, and the dynamic iron core (13) is located at the static iron core (7) Lower section, be connected to dynamic guide rod on connecting rod (10) through static iron core (7) hollow space and respectively with repulsion dish (6) and dynamic iron core (13) it is connected, touch spring (8) and separating brake back-moving spring (9), the end of the separating brake back-moving spring (9) is surrounded with dynamic guide rod It is against in dynamic iron core (13)；

When the powder operation device is connected to reclosing command, second controller control is inhaled and coil (11) and hold-in winding (12) energization So that then dynamic iron core (13) first overcomes separating brake back-moving spring (9) elastic force while overcomes separating brake back-moving spring (9) and touch spring (8) elastic force moves upwards, and when the powder operation device is in closing position, second controller control is inhaled and coil (11) power-off And hold-in winding (12) is powered and causes dynamic iron core (13) and static iron core (7) to be stably held in suction and state with constant compression contact bullet Spring (8)；

When the powder operation device is connected to separating brake instruction, second controller control hold-in winding (12) power-off and suction and coil (11) Reversely it is powered, dynamic iron core (13) is first moved downward under touch spring (8) and separating brake back-moving spring (9) collective effect and then existed Moved downward under separating brake back-moving spring (9) independent role and realize sub-switching operation, when the powder operation device is in open position, point Lock back-moving spring (9) keeps separating brake.

2. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that it is preferable, when the actuating fills Put when being connected to quick acting switching-off instruction, the first controller control switching winding (5) electric discharge, repulsion dish (6) drivening rod is realized quick Disjunction.

3. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The charging and discharging circuit by with Driving electric capacity, IGCT, the coil of precharge are composed in series, coil both ends reverse parallel connection fly-wheel diode.

4. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The powder operation device is in electromagnetic motor Buffer unit (14) is provided with below structure (2), when the powder operation device is in open position, separating brake back-moving spring (9) and buffering Device (8) keeps separating brake, and buffer unit (14) includes oil bumper, damping buffer or spring buffer.

5. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：When the powder operation device is connected to conjunction When lock instructs, second controller is powered using electric capacity to suction and coil (11).

6. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The repulsion dish (6) are generation The circle or annular shape of vortex, repulsion dish (6) include copper or aluminium alloy conductive material.

7. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The section of the static iron core (7) Shape includes U-shaped, E types or helical is tubular, and the static iron core (7) is permeability magnetic material.

8. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The hold-in winding (12) seals in Resistance, separating brake back-moving spring (9) have predetermined pre compressed magnitude, and switching winding (5) includes sandwich wound coil, the material of the dynamic guide rod Expect for non-magnet material.

9. the powder operation device of dc circuit breaker according to claim 1, it is characterised in that：The repulsive force mechanism (1) and electricity It is provided with insulating element between magnetic mechanism (2) to isolate, the pre compressed magnitude and coefficient of elasticity of touch spring (8) are more than separating brake back-moving spring (9)。

10. a kind of actuating method of the powder operation device of dc circuit breaker using any one of claim 1-9, its step Including：

The powder operation device is connected to reclosing command, and second controller control, which inhales to be powered with coil (11) and hold-in winding (12), to be caused Dynamic iron core (13) first overcomes separating brake back-moving spring (9) elastic force and then while overcomes separating brake back-moving spring (9) and touch spring (8) Elastic force moves upwards, and when the powder operation device is in closing position, second controller control is inhaled and coil (11) power-off and guarantor Coil (12) is held to be powered so that dynamic iron core (13) and static iron core (7) are stably held in suction and state with constant compression touch spring (8)；

The powder operation device is connected to separating brake instruction, second controller control hold-in winding (12) power-off and suction and coil (11) is reverse It is powered, dynamic iron core (13) first moves downward and then in separating brake under touch spring (8) and separating brake back-moving spring (9) collective effect Moved downward under back-moving spring (9) independent role and realize sub-switching operation, when the powder operation device is in open position, separating brake is multiple Position spring (9) and buffer unit (14) keep separating brake；

The powder operation device is connected to quick acting switching-off instruction, the first controller control switching winding (5) electric discharge, and repulsion dish (6) drive Connecting rod (10) realizes quick disjunction.