CN210016141U - Temporary overcurrent protection device for high-reliability switch yard of intelligent substation - Google Patents

Abstract

The utility model provides a temporary overcurrent protection device for a high-reliability switch field of an intelligent substation, which comprises a box body and a threading pipe arranged on one side of the box body. There is a mounting seat between the insulating horizontal plate and the insulating vertical plate. The insulating horizontal plate and the insulating vertical plate divide the heat dissipation cavity into a plurality of heat dissipation chambers, and the mounting seat is provided with a wire feeding channel. , an installation frame is installed in the heat dissipation cavity, a first installation cavity is arranged in the installation frame, an overcurrent protection device is arranged in the first installation cavity, and a plurality of first pistons are arranged on the side of the installation frame close to the overcurrent protection device. A first piston shaft is installed on the side of the piston away from the installation frame, and a limit buckle for clamping the overcurrent protection device is installed on the side of the first piston shaft away from the first piston. The first piston and the limit buckle are installed A first spring is arranged therebetween, and the first spring is sleeved on the outer circumference of the first piston shaft. The utility model has excellent heat dissipation performance.

Description

Temporary overcurrent protection device for high reliability switch yard in smart substation

technical field

The utility model relates to the technical field of power protection equipment, in particular to a temporary overcurrent protection device for a high-reliability switch yard of an intelligent substation.

Background technique

At present, when a new line is put into operation, there are usually two startup schemes. One is to use the bus tie protection device as a temporary overcurrent protection device. When the protection device operates, the running line is cut off, but this method is cumbersome and will destroy the normal operation mode of the power grid, prolong the abnormal operation time of the power grid, and reduce the reliability and stability of the power grid. Therefore, a separate temporary Overcurrent protection device. The current circuit of the temporary overcurrent protection device is connected in series with the protection device to be verified, and the trip circuit is connected in parallel with the protection device to be verified, and is installed at the same location as the protection device to be verified, so as to realize the fault removal of the newly commissioned line. However, with the large number of smart substations put into operation, the physical structure of the substation has changed. The merging unit converts the current and voltage into SV information, and transmits it to the protection device through the optical fiber, which is usually installed in the smart component cabinets and smart terminals in the switchyard. Trips the circuit breaker by receiving a trip command from the protective device. The temporary overcurrent protection device can only receive analog samples and trip through the cable. In this case, the temporary overcurrent protection device can only be installed in the intelligent component cabinet, and cannot adapt to the harsh working environment of the outdoor switchyard.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a temporary overcurrent protection device for a high-reliability switch field of an intelligent substation, which has excellent heat dissipation performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a temporary overcurrent protection device for a high-reliability switch yard of an intelligent substation, including a box body and a threading pipe arranged on one side of the box body, characterized in that the box body is provided with heat dissipation The heat dissipation cavity is provided with a plurality of partitions, the partitions are provided with wire feeding channels, the partitions divide the heat dissipation cavity into a plurality of heat dissipation chambers, a mounting frame is installed in the heat dissipation cavity, and a first mounting cavity is arranged in the mounting frame. An overcurrent protection device is arranged in the first installation cavity, a plurality of first pistons are arranged on the side of the installation frame close to the overcurrent protection device, and a first piston shaft is installed on the side of the first piston away from the installation frame. A limit buckle is installed on the side away from the first piston for clamping the overcurrent protection device, a first spring is arranged between the first piston and the limit buckle, and the first spring is sleeved on the outer circumference of the first piston shaft .

Further, the mounting frame and the inner wall of the box are integrally formed, and the mounting frame is provided with a plurality of second heat dissipation holes.

Further, the box body is provided with a plurality of first heat dissipation holes communicating with the heat dissipation cavity.

Further, a mounting ring is provided on the inner wall of the threading pipe, a hinge is mounted on the side of the mounting ring away from the inner wall of the threading pipe, and a sealing ring is mounted on the hinge.

Further, a plurality of second installation cavities are provided on the side of the installation ring away from the inner wall of the threading pipe, and a second piston is installed in the second installation cavity and on the side of the installation ring away from the threading pipe. A second piston shaft is installed on the side of the piston away from the threading pipe, a mounting plate is installed on the side of the second piston shaft away from the second piston, a rotating shaft is installed on the installation plate, and a limiting wheel is installed on the rotating shaft.

Further, a second spring is provided between the second piston and the mounting plate, and the second spring is sleeved on the outer circumference of the second piston shaft.

After adopting the above-mentioned technical scheme, the utility model has the following advantages:

1. By setting up multiple partitions in the box, the partitions can divide the heat dissipation cavity in the box into multiple heat dissipation chambers, realize the partition heat dissipation layout of different modules, and avoid heat accumulation caused by heat dissipation stacking between different modules. The heat dissipation performance is fully improved, and an installation frame is installed in each heat dissipation chamber, and an overcurrent protection device is installed in the installation frame. The first piston, the first piston shaft and the limit snap fit on the installation frame realize overcurrent convection. The stable limit of the protection device is fixed, which improves the stability of the installation of each module, and the modules are connected through the wire feed channel, which will not cause mutual heat influence and avoid the mutual interference of different modules. Effectively improve the security of the device when using.

2. The mounting frame is integrally formed with the inner wall of the box, and the mounting frame is provided with a plurality of second heat dissipation holes, and the second heat dissipation holes realize the independent heat dissipation of the independent modules, which further improves the heat dissipation performance.

3. By setting a plurality of heat dissipation cavities on the box body, the heat dissipation performance of the protection device can be effectively improved.

4. By installing an installation ring on the inner wall of the threading pipe, and installing a hinge on the side of the installation ring away from the inner wall of the threading pipe, and installing a sealing ring on the hinge, the sealing ring can realize the waterproofing of the cable threading when the cable is threading, and improve the performance of the cable. Safety of equipment use.

5. By setting a plurality of second installation cavities on the side of the installation ring away from the inner wall of the threading pipe, and installing the second piston, the second piston shaft and the installation plate in the second installation cavity and on the installation ring, and on the installation plate A limit wheel is installed on the upper through the rotating shaft, the limit wheel can limit the cable, and the second piston shaft is retracted in the second piston, so that the limit wheel can be adjusted according to different cable diameters to achieve different The diameter cable is fixed, which improves the stability of the cable connection.

6. By arranging a second spring between the second piston and the mounting plate, the second spring is arranged on the outer circumference of the second piston shaft, and the elastic force of the second spring is used as a reaction force to realize the extrusion of the cable and improve the fixing of the cable. stability.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

1 is a schematic top view of the structure of a temporary overcurrent protection device for a high-reliability switch yard of a smart substation proposed in Embodiment 1 of the present utility model;

2 is a cross-sectional view of a temporary overcurrent protection device for a high-reliability switch yard of a smart substation proposed in Embodiment 1 of the present utility model;

Fig. 3 is the partial enlarged schematic diagram of A place in Fig. 2;

Fig. 4 is the top view of the threading pipe in the high-reliability switch yard temporary overcurrent protection device of the smart substation proposed in the second embodiment of the present invention;

FIG. 5 is a partial enlarged schematic view of B in FIG. 4 .

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following "up", "down", "left", "right", "portrait", "horizontal", "inner", "outer", "vertical", "horizontal", " Words indicating orientation or positional relationship such as "top" and "bottom" are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device/element must have A particular orientation or construction and operation in a particular orientation is therefore not to be construed as a limitation of the present invention.

Example 1

As shown in Figures 1-3, the high-reliability switch yard temporary overcurrent protection device for an intelligent substation provided by the present invention includes a box body 1 and a conduit 3 arranged on one side of the box body 1. The box body 1 is provided with heat dissipation Cavity 2, a plurality of partitions 5 are arranged in the heat dissipation cavity 2, and a wire feeding channel 7 is arranged on the partition plate 5. The partition plate 5 divides the heat dissipation cavity 2 into a plurality of heat dissipation chambers, and a mounting frame 9 is installed in the heat dissipation cavity 2. A first installation cavity 10 is arranged in the frame 9, an overcurrent protection device 12 is arranged in the first installation cavity 10, and a plurality of first pistons 13 are arranged on the side of the installation frame 9 close to the overcurrent protection device 12. The first pistons 13 A first piston shaft 14 is installed on the side away from the installation frame 9 , and a limit buckle 16 for clamping the overcurrent protection device 12 is installed on the side of the first piston shaft 14 away from the first piston 13 . The first piston 13 and A first spring 15 is provided between the limit buckles 16 , and the first spring 15 is sleeved on the outer circumference of the first piston shaft 14 . By arranging a plurality of partitions 5 in the box body 1, the partition plate 5 realizes that the heat dissipation cavity 2 in the box body 1 is divided into a plurality of heat dissipation chambers, realizes the partition heat dissipation layout for different modules, and avoids heat dissipation between different modules. The stacking leads to heat accumulation, which fully improves the heat dissipation performance. A mounting frame 9 is installed in each heat dissipation chamber, and an overcurrent protection device 12 is installed in the mounting frame 9. The first piston 13 on the mounting frame 9, the first piston shaft 14 and the limit buckle 16 cooperate to realize the stable limit and fixation of the overcurrent protection device 12, which improves the stability of the installation of each module, and the modules are connected through the wire feeding channel 7, which will not cause mutual It also avoids the mutual interference of the work of different modules, effectively improves the safety of the equipment when it is used, and can operate normally under unprotected conditions such as unprotected rooms, secondary equipment compartments, and outdoor cabinets, and can be better Adapt to the harsh working environment of outdoor switch yards.

When one of the modules is broken, it can be replaced independently, which effectively improves the safety of the equipment during use, reduces the maintenance cost of the equipment, and facilitates the maintenance of the equipment.

It can be understood that the number of partitions 5 may be one or more. Specifically, in this embodiment, there are two partitions 5 , and the partitions 5 divide the heat dissipation cavity into three heat dissipation chambers.

In the first embodiment, the mounting frame 9 is integrally formed with the inner wall of the box body 1 , and the mounting frame 9 is provided with a plurality of second heat dissipation holes 11 . The mounting frame 9 is integrally formed with the inner wall of the box 1, and the mounting frame 9 is provided with a plurality of second heat dissipation holes 11, which realize independent heat dissipation of independent modules, and further improve the heat dissipation performance.

In the first embodiment, the box body 1 is provided with a plurality of first heat dissipation holes 4 communicating with the heat dissipation cavity 2 . By arranging a plurality of heat dissipation cavities 2 on the box body 2, the heat dissipation performance of the protection device can be effectively improved.

It can be understood that the box body 1 , the heat insulating transverse plate 5 and the heat insulating vertical plate 8 are all high temperature resistant and electromagnetic shielding plates, which can effectively improve the heat resistance and electromagnetic interference resistance of the temporary overcurrent protection device.

It can be understood that the box body 1 is integrally formed and is divided into partitions. Each module does not interfere with each other and has good heat dissipation performance, so that the device reaches the IP67 protection level and can work at -40℃～+70℃. °C ambient temperature.

It can be understood that since the layout of the box body 1 is partitioned, the board layout is optimized, the size of the temporary overcurrent device is greatly reduced, and the carrying of the temporary overcurrent device is facilitated.

It can be understood that the conduit 3 is also plugged with an external special connector, which can realize plug and play, and improve the safety and convenience of on-site operation.

It can be understood that the temporary overcurrent protection device of the present invention can be installed in the switchyard nearby to realize the local sampling and tripping of the intelligent station, so as to avoid the need to empty a section of the busbar to carry out the load test when it is put into operation, and avoid the complicated failure. gate operation, reducing grid downtime and operational risks.

Embodiment 2

As shown in Figures 4-5, the difference between the second embodiment and the first embodiment is that the inner wall of the threading pipe 3 is provided with a mounting ring 17, and the side of the mounting ring 17 away from the inner wall of the threading pipe 3 is installed with a hinge 18, and the hinge A sealing ring 19 is mounted on 18 . By installing the mounting ring 17 on the inner wall of the cable threading pipe 3, and installing the hinge 18 on the side of the mounting ring 17 away from the inner wall of the cable threading pipe 3, and installing the sealing ring 19 on the hinge 18, the sealing ring 19 can realize the protection of the cable during the cable threading. The threading is waterproof, which improves the safety of the equipment.

In the second embodiment, a plurality of second installation cavities 20 are provided on the side of the mounting ring 17 away from the inner wall of the threading pipe 3 , and a second piston is installed in the second mounting cavity 20 and on the side of the mounting ring 17 away from the threading pipe 17 21. A second piston shaft 22 is installed on the side of the second piston 21 away from the threading pipe 17, a mounting plate 24 is installed on the side of the second piston shaft 22 away from the second piston 21, and a rotating shaft 25 is installed on the installation plate 24. A limit wheel 26 is installed on the 25 . A plurality of second installation cavities 20 are provided on the side of the installation ring 17 away from the inner wall of the threading pipe 3 , and the second piston 21 , the second piston shaft 22 and the installation plate are installed in the second installation cavity 20 and on the installation ring 17 24, and a limit wheel 26 is installed on the mounting plate 24 through the rotating shaft 25. The limit wheel 26 can limit the cable, and the second piston shaft 22 can be extended and retracted in the second piston 21, so that the limit wheel 26 can be It is adjusted according to different cable diameters, so as to realize the fixing of cables with different diameters, and improve the stability of the cable connection.

In the second embodiment, a second spring 23 is provided between the second piston 21 and the mounting plate 24 , and the second spring 23 is sleeved on the outer circumference of the second piston shaft 22 . By arranging a second spring 23 between the second piston 21 and the mounting plate 24, the second spring 23 is arranged on the outer circumference of the second piston shaft 22, and the elastic force of the second spring 23 is used as a reaction force to realize the extrusion of the cable, Improve the stability of cable fixing.

It can be understood that the overcurrent protection device 12 used in the first and second embodiments of the present utility model adopts the overcurrent protection device of the PSL638U model, and the current, voltage and switching state quantity data are collected through the special connecting line, and the data are collected according to different parameters. The algorithm realizes the protection function of different equipment. For the temporary overcurrent device of the line, it includes the longitudinal differential protection, distance protection, zero sequence protection, reclosing and other functions. For the temporary overcurrent device of the bus, it includes the bus differential protection, bus tie Circuit breaker failure protection and dead zone protection, circuit breaker failure protection, bus tie (section) charging overcurrent protection and other functions.

It should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity, and do not necessarily require or imply any existence between these entities or operations. This actual relationship or order, and the terms "comprising", "comprising" or any other variation thereof, are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a series of elements includes not only which elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the spirit and circumstances of the present invention , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. Interim overcurrent protection device in intelligent substation high reliability switch field, include the box and locate the threading pipe of box one side, a serial communication port, be equipped with the heat dissipation chamber in the box, the heat dissipation intracavity is equipped with a plurality of baffles, establish on the baffle and send the line passageway, the baffle is cut apart into a plurality of heat dissipation rooms with the heat dissipation chamber, install the installing frame in the heat dissipation chamber, be equipped with first installation cavity in the installing frame, be equipped with overcurrent protection device in the first installation cavity, one side that the installing frame is close to overcurrent protection device is equipped with a plurality of first pistons, first piston is kept away from one side of installing frame and is installed first piston shaft, one side that first piston shaft kept away from first piston is installed and is used for the spacing buckle of joint overcurrent protection device, be equipped with first spring between first piston and the spacing buckle, first spring cup joints the periphery at first piston shaft.

2. The temporary overcurrent protection device for the intelligent substation high-reliability switch yard according to claim 1, wherein the installation frame and the inner wall of the box body are integrally formed, and the installation frame is provided with a plurality of second heat dissipation holes.

3. The temporary overcurrent protection device for the intelligent substation high-reliability switch yard according to claim 1, wherein a plurality of first heat dissipation holes communicated with the heat dissipation cavity are formed in the box body.

4. The temporary overcurrent protection device for the intelligent substation high-reliability switch yard according to claim 1, wherein a mounting ring is arranged on the inner wall of the threading pipe, a hinge is arranged on one side of the mounting ring away from the inner wall of the threading pipe, and a sealing ring is arranged on the hinge.

5. The temporary overcurrent protection device for the intelligent substation high-reliability switch yard according to claim 4, wherein a plurality of second installation cavities are arranged on one side, away from the inner wall of the threading pipe, of the installation ring, a second piston is installed in each second installation cavity and on one side, away from the threading pipe, of the installation ring, a second piston shaft is installed on one side, away from the threading pipe, of the second piston, a mounting plate is installed on one side, away from the second piston, of the second piston shaft, a rotating shaft is installed on the mounting plate, and a limiting wheel is installed on the rotating shaft.

6. The temporary overcurrent protection device for the intelligent substation high-reliability switch yard according to claim 5, wherein a second spring is arranged between the second piston and the mounting plate, and the second spring is sleeved on the periphery of the second piston shaft.

Images