CN111029222A - High-voltage direct-current breaker rapid mechanical switch layout structure - Google Patents

Abstract

The invention relates to a high-voltage direct-current breaker rapid mechanical switch layout structure, which comprises: having two fast mechanical switch assemblies and a welded frame base (15); the two quick mechanical switch assemblies are arranged on a welding frame base (15) in a double-row symmetrical mode; the two fast mechanical switch assemblies comprise: a fast mechanical switch body (16) and a shock absorber (19); the shock absorber (19) is positioned between the quick mechanical switch body (16) and the welding frame base (15) and is used for absorbing impact energy generated when the quick mechanical switch body (16) is instantly opened and closed. The invention provides a rapid mechanical switch layout structure of a high-voltage direct-current circuit breaker, which can effectively prevent mechanical damage to a bus bar connection part caused by vibration generated by instantaneous on-off of a switch and effectively reduce the influence of impact vibration of a rapid mechanical switch body on a support structural member, a connection bus bar and a secondary equipment fixing element.

Description

High-voltage direct-current breaker rapid mechanical switch layout structure

Technical Field

The invention relates to the technical field of high-voltage direct-current power transmission, in particular to a rapid mechanical switch layout structure of a high-voltage direct-current circuit breaker.

Background

The high-voltage direct-current circuit breaker is a key device for constructing a flexible direct-current power grid, can quickly realize fault isolation and clearing of a direct-current system, is vital to improvement of reliability, economy and flexibility of operation of the flexible direct-current power grid, has high current rising rate due to faults of the flexible direct-current system, is limited in overcurrent resistance of a converter valve, and has no natural zero point due to lack of direct current, so that direct current in the high-voltage direct-current system is cut off, and meanwhile, the technical problem of high speed, high voltage, high current and high energy is faced.

The quick mechanical switch is the core equipment of high voltage direct current circuit breaker, and among the prior art, quick mechanical switch is fixed in on the rigid support structure spare to the connection between the switch fracture adopts rigid female arranging, and the break-make or the closure can produce very big impact vibration in the twinkling of an eye this moment, causes bearing structure, rigid connection structure's mechanical damage easily, also can lead to secondary equipment interface fixed element to become flexible simultaneously.

The energy supply configuration of the rapid mechanical switch is generally that one rapid mechanical switch is configured with one isolation transformer, in a high-voltage level application environment, a series connection mode of a plurality of rapid mechanical switches is adopted, the voltage-resistant requirement of a single fracture is reduced, thus the isolation transformers with the same quantity are required to be configured, the cost is greatly increased, for the convenience of structural wiring, the potential fixation only considers nearby fixation, but multipoint grounding is easy to occur in the fixation mode, the self impedance of an equipotential line and other metal parts exists, the potentials of the conductors under the transient working condition are possibly different and can generate circulating current, therefore, the influence of impact vibration of the rapid mechanical switch on other structural parts is required to be reduced, an energy supply system is reasonably arranged, the cost is reduced, and meanwhile, the equipotential fixation mode is reasonably arranged to prevent the circulating current.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a rapid mechanical switch layout structure of a high-voltage direct-current circuit breaker.

The technical scheme provided by the invention is as follows:

the utility model provides a quick mechanical switch layout structure of high voltage direct current circuit breaker which characterized in that: the method comprises the following steps: having two fast mechanical switch assemblies and a welded frame base (15);

the two quick mechanical switch assemblies are arranged on a welding frame base (15) in a double-row symmetrical mode;

the two fast mechanical switch assemblies comprise: a fast mechanical switch body (16) and a shock absorber (19); the shock absorber (19) is positioned between the quick mechanical switch body (16) and the welding frame base (15) and is used for absorbing impact energy generated when the quick mechanical switch body (16) is instantly opened and closed.

Preferably, the vibration damper (19) is embodied as a spring or a damper.

Preferably, the two fast mechanical switch assemblies further comprise a case in which the fast mechanical switch body (16) is disposed;

the box bodies of the two quick mechanical switch assemblies are arranged on a welding frame base (15) through the shock absorbers (19).

Preferably, the welding frame base (15), the box body of the quick mechanical switch body (16) and the shock absorber (19) are connected through bolts and gaskets.

Preferably, the bolt washer includes a lock washer for preventing the bolt from loosening due to the vibration of the switch.

Preferably, the welding frame is a multilayer;

and each layer is provided with the welding frame base (15) and two quick mechanical switch components.

Preferably, each layer of welding frame is also provided with an energy supply isolation transformer assembly (3);

the two quick mechanical switch assemblies are arranged on two sides of the functional isolation transformer assembly (3) in a mirror image mode.

Preferably, the energy supply isolation transformer assembly (3) comprises: an energy supply isolation transformer body (29), a first energy supply isolation transformer body support beam (38), a second energy supply isolation transformer body support beam (39) and a third energy supply isolation transformer body support beam (40);

the energy supply isolation transformer body (29) includes: two cascaded isolation transformers;

each isolation transformer is supported by a first energy supply isolation transformer body supporting beam (38), a second energy supply isolation transformer body supporting beam (39) and a third energy supply isolation transformer body supporting beam (40) and is fixed on the welding frame base (15) on the same layer.

Preferably, the two fast mechanical switch assemblies further comprise: the flexible copper busbar comprises a soft braided wire copper busbar (4), a hard copper busbar, a control cubicle (17) and a thin copper busbar;

the soft braided wire copper bar (4) is connected with the quick mechanical switch body (16);

the hard copper bar is connected with the two quick mechanical switch assemblies;

the control cubicle (17) is connected with the box body of the rapid mechanical switch body (16);

the thin copper bar includes: the device comprises a first thin copper bar (21), a second thin copper bar (22), a thin copper bar connecting plate (25), a third thin copper bar (26) and a fourth thin copper bar (27);

the first thin copper bar (21), the second thin copper bar (22), the third thin copper bar (26) and the fourth thin copper bar (27) are fixed on the control cubicle (17) through the thin copper bar connecting plate (25).

Preferably, the two fast switch assemblies further comprise a resistance-capacitance voltage sharing device (18), a flexible cable groove (20), a heat radiator (24), a first insulating support frame (23) and a second insulating support frame (28);

the resistance-capacitance voltage-sharing device (18) is connected with the rapid mechanical switch body (16) in parallel through a thin copper bar;

the flexible cable trough (20) is fixed on the welding frame base (15);

the radiator (24) is fixedly arranged on the quick mechanical switch body (16) through the first insulating support frame (23) and the second insulating support frame (28).

Compared with the prior art, the invention has the beneficial effects that:

1. the invention relates to a high-voltage direct-current breaker rapid mechanical switch layout structure, which comprises: having two fast mechanical switch assemblies and a welded frame base (15); the two quick mechanical switch assemblies are arranged on a welding frame base (15) in a double-row symmetrical mode; the two fast mechanical switch assemblies comprise: a fast mechanical switch body (16) and a shock absorber (19); the shock absorber (19) is positioned between the quick mechanical switch body (16) and the welding frame base (15) and is used for absorbing impact energy generated when the quick mechanical switch body (16) is instantly opened and closed. The invention provides a rapid mechanical switch layout structure of a high-voltage direct-current circuit breaker, which can effectively prevent mechanical damage to a bus bar connection part caused by vibration generated by instantaneous on-off of a switch and effectively reduce the influence of impact vibration of a rapid mechanical switch body on a support structural member, a connection bus bar and a secondary equipment fixing element.

2. The invention provides a high-voltage direct-current breaker rapid mechanical switch layout structure, wherein an energy supply isolation transformer body (29) comprises: isolation transformer that two cascades constitute, isolation transformer arrangement is every layer 1, and every energy supply isolation transformer body (29) support with first energy supply isolation transformer body supporting beam (38), second energy supply isolation transformer body supporting beam (39) and third energy supply isolation transformer body supporting beam (40) support and be fixed in on same floor's welding frame base (15), and every layer of energy supply isolation transformer gives two quick mechanical switch subassemblies energy supplies respectively, the energy supply isolation transformer quantity that significantly reduces, the cost is reduced.

3. The invention provides a layout structure of a quick mechanical switch of a high-voltage direct-current circuit breaker, wherein a welding frame base (15) is connected with a bottom metal of a resistance-capacitance voltage-sharing device (18) to form an equipotential, a lower terminal of a fracture of a quick mechanical switch body (16) is connected with the bottom end of the resistance-capacitance voltage-sharing device (18) through a first thin copper bar (21) and a third thin copper bar (26) to form the equipotential, a collection control cabinet (17) is connected with a box body of the quick mechanical switch body (16) through the equipotential line to form the equipotential, the box body of the quick mechanical switch body (16) is connected with the lower terminal of the fracture through the equipotential line to form the equipotential, a rubber layer exists on a shock absorber (19) connected between the box body of the quick mechanical switch body (16) and the welding frame base (15), and the box body of the quick mechanical switch body (16) is, avoid appearing multiple spot ground connection, energy supply isolation transformer's output respectively with first hard copper bar (5) and the hard copper bar of second (6) of connection between first quick mechanical switch (1) and first quick mechanical switch (2) are connected, constitute the equipotential, first hard copper bar (5) and the hard copper bar of second (6) are connected to utmost point terminal under quick mechanical switch body (16) fracture through soft braided wire copper bar (4), just energy supply output constitutes the equipotential with utmost point terminal under quick mechanical switch body (16) fracture, keeps single-point tree-like ground connection, and this kind of single-point tree-like ground connection method route is arranged rationally, can effectively avoid appearing multiple spot ground connection and produce the circulation.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a fast mechanical switch of a high-voltage direct-current circuit breaker provided by the invention;

fig. 2 is a structural diagram of a fast mechanical switch of the high-voltage direct-current circuit breaker provided by the invention;

fig. 3 and 4 are schematic diagrams of a first fast mechanical switch provided by the present invention;

fig. 5 and 6 are schematic diagrams of a second fast mechanical switch provided by the present invention;

FIG. 7 is a schematic diagram of the power isolation transformer assembly provided by the present invention;

FIG. 8 is a schematic structural diagram of a power isolation transformer body according to the present invention;

in the figure: 1-a first fast mechanical switch, 2-a second fast mechanical switch, 3-an energy supply isolation transformer assembly, 4-a soft braided wire copper bar, 5-a first hard copper bar, 6-a second hard copper bar, 7-a first inlet and outlet wire bus bar, 8-a second inlet and outlet wire bus bar, 9-a first bus bar fixing insulator, 10-a second bus bar fixing insulator, 11-a suspension insulator, 12-an interlayer insulator, 13-an optical fiber groove, 14-a suspension insulator fixing plate, 15-a welding frame base, 16-a fast mechanical switch body, 17-a convergence cabinet, 18-a resistance-capacitance voltage-sharing device, 19-a shock absorber, 20-a flexible cable groove, 21-a first thin copper bar, 22-a second thin copper bar, 23-a first insulation support frame, 24-a radiator, 25-a thin copper bar connecting plate, 26-a third thin copper bar, 27-a fourth thin copper bar, 28-a second insulating support frame, 29-an energy supply isolation transformer body, 30-a first collection control cabinet energy supply bus bar, 31-a second collection control cabinet energy supply bus bar, 32-a third collection control cabinet energy supply bus bar, 33-a fourth collection control cabinet energy supply bus bar, 34-a first isolation equipotential bus bar, 35-a second isolation equipotential bus bar, 36-an interlayer isolation equipotential line, 37-an energy supply isolation transformer body supporting beam, 38-a first energy supply isolation transformer body supporting beam, 39-a second energy supply isolation transformer body supporting beam, 40-a third energy supply isolation transformer body supporting beam, 41-a first pair of terminals, 42-a second pair of terminals, and 43-a third pair of terminals.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the present invention provides a schematic diagram of a fast mechanical switch of a high voltage dc circuit breaker, and the present invention relates to a layout structure of a fast mechanical switch of a high voltage dc circuit breaker, which is characterized by comprising: having two fast mechanical switch assemblies and a welded frame mount 15;

the two quick mechanical switch assemblies are arranged on the welding frame base 15 in a double-row symmetrical mode;

the two fast mechanical switch assemblies comprise: a fast mechanical switch body 16 and a damper 19; the shock absorber 19 is located between the fast mechanical switch body 16 and the welding frame base 15, and is used for absorbing impact energy generated when the fast mechanical switch body 16 is instantaneously opened and closed.

The two fast mechanical switch assemblies comprise: a first fast mechanical switch 1 and a second fast mechanical switch 2;

the invention provides a rapid mechanical switch layout structure of a high-voltage direct-current circuit breaker, which can effectively prevent mechanical damage to a bus bar connection part caused by vibration generated by instant on-off of a switch and effectively reduce the influence of impact vibration of a rapid mechanical switch body 16 on a support structural member, a connection bus bar and a secondary equipment fixing element.

The shock absorber 19 is embodied as a spring or a damper.

As shown in fig. 2, which is a structural diagram of a fast mechanical switch of a high-voltage direct-current circuit breaker according to the present invention, an output end of the energy-supplying isolating transformer body 29 is respectively connected to a first hard copper bar 5 and a second hard copper bar 6 connected between the first fast mechanical switch 1 and the second fast mechanical switch 2;

the first hard copper bar 5 and the second hard copper bar 6 are respectively connected to a lower pole terminal of the quick mechanical switch body 16 through the soft braided wire copper bar 4;

and the energy supply output end and the lower pole terminal of the quick mechanical switch body 16 form an equipotential.

As shown in fig. 3 and fig. 4, which are schematic diagrams of the first fast mechanical switch provided by the present invention, the first fast mechanical switch 1 and the second fast mechanical switch 2 further include: the control cabinet 17, the resistance-capacitance voltage-sharing device 18, the flexible cable groove 20, the thin copper bar, the first insulating support frame 23, the second insulating support frame 28, the radiator 24 and the soft braided wire copper bar 4;

the quick mechanical switch body 16 is connected in parallel with the resistance-capacitance voltage-sharing device 18 through the thin copper bar;

the flexible cable groove 20 is fixed on the welding frame base 15 and is close to the control cubicle 17;

the control cubicle 17 is fixed on the welding frame base 15 and is arranged with the flexible cable groove 20 in sequence;

the radiator 24 is fixedly mounted on the quick mechanical switch body 16 through the first insulating support frame 23 and the second insulating support frame 28, and the quick mechanical switch body 16 is connected through the soft braided wire copper bars 4 respectively;

the welding frame base 15 is connected with the bottom metal of the resistance-capacitance pressure-equalizing device 18;

the lower pole terminal of the rapid mechanical switch body 16 is connected with the bottom end of the resistance-capacitance voltage-sharing device 18 through the first thin copper bar 21 and the third thin copper bar 26;

the control cubicle 17 is connected with the box body of the rapid mechanical switch body 16 through an equipotential line;

the box body of the rapid mechanical switch body 16 is connected with the lower pole terminal through an equipotential line;

the shock absorber 19 is positioned between the quick mechanical switch body 16 and the welding frame base 15, and a rubber layer is arranged between the quick mechanical switch body 16 and the welding frame base 15; the rubber layer is wrapped outside the shock absorber 19;

the output end of the energy supply isolation transformer body 29 is respectively connected with a first hard copper bar 5 and a second hard copper bar 6 which are connected between the first fast mechanical switch 1 and the second fast mechanical switch 2;

the first hard copper bar 5 and the second hard copper bar 6 are respectively connected to the lower pole terminal of the quick mechanical switch body 16 through the soft braided wire copper bar 4, and the energy supply output end and the lower pole terminal of the quick mechanical switch body 16 form an equipotential,

and the single-point tree-shaped grounding method has reasonable route arrangement and can effectively avoid the circulation generated by multipoint grounding.

Fig. 5 and fig. 6 are schematic diagrams of a second fast mechanical switch provided by the present invention, wherein the fast mechanical switch body 16, the vibration damper 19 and the welding frame base 15 are connected by using bolt gaskets;

the bolt gasket comprises a locking washer for preventing the bolt from loosening caused by switch vibration;

the first and second fast mechanical switches 1 and 2 further comprise: the device comprises a first incoming and outgoing line busbar 7, a second incoming and outgoing line busbar 8, a plurality of first busbar fixing insulators 9, a plurality of second busbar fixing insulators 10, a plurality of suspension insulators 11, a plurality of interlayer insulators 12, a plurality of optical fiber grooves 13 and a suspension insulator fixing plate 14;

the two ends of the first quick mechanical switch 1 and the second quick mechanical switch 2 are respectively provided with a first incoming and outgoing line busbar 7 and a second incoming and outgoing line busbar 8, and the first quick mechanical switch 1 and the second quick mechanical switch 2 are connected in series;

the first busbar fixing insulator 9, the suspension insulator 11 and the interlayer insulator 12 are respectively fixed on the welding frame base 15 and the suspension insulator fixing plate 14;

the interlayer insulator 12 is positioned between the first fast mechanical switch 1 and the second fast mechanical switch 2 and is used for supporting the first fast mechanical switch 1 and the second fast mechanical switch 2;

the optical fiber groove 13 is fixed on the welding frame base 15 between the layers, and forms an optical fiber path with the flexible cable groove 20 in the first fast mechanical switch 1 and the second fast mechanical switch 2.

As shown in fig. 7, which is a schematic structural diagram of the energy supply isolation transformer assembly provided by the present invention, the energy supply isolation transformer assembly 3 includes: an energy supply isolation transformer body 29, a first energy supply isolation transformer body support beam 38, a second energy supply isolation transformer body support beam 39, and a third energy supply isolation transformer body support beam 40;

the energy supply isolation transformer body 29 includes: two cascaded isolation transformers;

each isolation transformer is supported by a first energy supply isolation transformer body support beam 38, a second energy supply isolation transformer body support beam 39 and a third energy supply isolation transformer body support beam 40 and is fixed on the welding frame base 15 on the same layer;

every layer of energy supply isolation transformer supplies energy to the quick mechanical switch assembly respectively, the number of the energy supply isolation transformers is greatly reduced, and the cost is reduced.

The energy supply isolation transformer assembly 3 further includes: a first collection control cabinet energy supply bus 30, a second collection control cabinet energy supply bus 31, a third collection control cabinet energy supply bus 32, a fourth collection control cabinet energy supply bus 33, a first isolation equipotential bus 34, a second isolation equipotential bus 35, an interlayer isolation equipotential line 36 and an equipotential line 37;

the first busbar 30 and the second busbar 31 are connected with the second pair of terminals 42, and the third busbar 32 and the fourth busbar 33 are connected with the third pair of terminals 43;

the second pair of terminals 42 of the energy supply isolation transformer body 29 is connected to the first pair of terminals 41 of the upper energy supply isolation transformer body 29 through the interlayer isolation variable energy supply busbar 36;

the N poles of the second pair of terminals 42 of the first layer energy supply isolation transformer body 29 are connected to the lower pole terminals of the first layer quick mechanical switch body 16 by using equipotential lines 37;

the N poles of a second pair of terminals 42 of the energy supply isolation transformer body 29 on the second layer are connected to the first hard copper bar 5 on the layer by adopting a first isolation equipotential bus bar 34;

and the N poles of the third pair of terminals 43 are connected to the second hard copper bar 6 on the layer where the second isolation equipotential busbar 35 is arranged.

As shown in fig. 8, which is a schematic structural diagram of the energy supply isolation transformer body provided by the present invention, the energy supply isolation transformer body 29 further includes: a first pair of terminals 41, a second pair of terminals 42, and a third pair of terminals 43;

the first pair of terminals 41 is located on the first energy supplying isolating transformer body support beam 38, the second pair of terminals 42 is located on the second energy supplying isolating transformer body support beam 39, and the third pair of terminals 43 is located on the third energy supplying isolating transformer body support beam 40.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention is included in the scope of the claims of the present invention filed as filed.

Claims (10)

1. The utility model provides a quick mechanical switch overall arrangement structure of high voltage direct current circuit breaker which characterized in that includes: having two fast mechanical switch assemblies and a welded frame base (15);

the two quick mechanical switch assemblies are arranged on a welding frame base (15) in a double-row symmetrical mode;

the two fast mechanical switch assemblies comprise: a fast mechanical switch body (16) and a shock absorber (19); the shock absorber (19) is positioned between the quick mechanical switch body (16) and the welding frame base (15) and is used for absorbing impact energy generated when the quick mechanical switch body (16) is instantly opened and closed.

2. The high voltage direct current breaker fast mechanical switch arrangement according to claim 1, characterized in that the shock absorber (19) is embodied as a spring or a damper.

3. The high voltage direct current breaker fast mechanical switch arrangement according to claim 1, characterized in that the two fast mechanical switch assemblies further comprise a box in which the fast mechanical switch body (16) is arranged;

the box bodies of the two quick mechanical switch assemblies are arranged on a welding frame base (15) through the shock absorbers (19).

4. The arrangement structure of the fast mechanical switch of the high-voltage direct current circuit breaker according to claim 1, characterized in that the welding frame base (15), the box body of the fast mechanical switch body (16) and the shock absorber (19) are connected by bolt gaskets.

5. The fast mechanical switch layout structure of the high voltage direct current breaker of claim 4, characterized in that the bolt washer comprises a lock washer for preventing the bolt from loosening caused by switch vibration.

6. The fast mechanical switch layout structure of the high voltage direct current breaker according to any one of claims 1 to 5, further comprising a welding frame, wherein the welding frame is multi-layered;

and each layer is provided with the welding frame base (15) and two quick mechanical switch components.

7. The fast mechanical switch layout structure of the high voltage direct current breaker according to claim 6, characterized in that each welding frame is further provided with an energy supply isolation transformer assembly (3);

the two quick mechanical switch assemblies are arranged on two sides of the functional isolation transformer assembly (3) in a mirror image mode.

8. The fast mechanical switch layout structure of high voltage direct current breaker according to claim 7,

the energy supply isolation transformer assembly (3) comprises: an energy supply isolation transformer body (29), a first energy supply isolation transformer body support beam (38), a second energy supply isolation transformer body support beam (39) and a third energy supply isolation transformer body support beam (40);

the energy supply isolation transformer body (29) includes: two cascaded isolation transformers;

each isolation transformer is supported by a first energy supply isolation transformer body supporting beam (38), a second energy supply isolation transformer body supporting beam (39) and a third energy supply isolation transformer body supporting beam (40) and is fixed on the welding frame base (15) on the same layer.

9. The high voltage direct current breaker fast mechanical switch topology of claim 1, said two fast mechanical switch assemblies further comprising: the flexible copper busbar comprises a soft braided wire copper busbar (4), a hard copper busbar, a control cubicle (17) and a thin copper busbar;

the soft braided wire copper bar (4) is connected with the quick mechanical switch body (16);

the hard copper bar is connected with the two quick mechanical switch assemblies;

the control cubicle (17) is connected with the box body of the rapid mechanical switch body (16);

the thin copper bar includes: the device comprises a first thin copper bar (21), a second thin copper bar (22), a thin copper bar connecting plate (25), a third thin copper bar (26) and a fourth thin copper bar (27);

the first thin copper bar (21), the second thin copper bar (22), the third thin copper bar (26) and the fourth thin copper bar (27) are fixed on the control cubicle (17) through the thin copper bar connecting plate (25).

10. The fast mechanical layout structure of a high voltage direct current breaker according to claim 1, characterized in that the two fast switch assemblies further comprise a resistance-capacitance voltage equalizing device (18), a flexible cable trough (20), a heat sink (24), a first insulating support frame (23) and a second insulating support frame (28);

the resistance-capacitance voltage-sharing device (18) is connected with the rapid mechanical switch body (16) in parallel through a thin copper bar;

the flexible cable trough (20) is fixed on the welding frame base (15);

the radiator (24) is fixedly arranged on the quick mechanical switch body (16) through the first insulating support frame (23) and the second insulating support frame (28).

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