CN215772243U

CN215772243U - One advances two 35kV protection control device

Info

Publication number: CN215772243U
Application number: CN202121063002.7U
Authority: CN
Inventors: 徐宁; 沈淼; 张玉才; 段果来; 佘建玲; 陈武; 梁爽; 胡贵杰; 朱镇涛; 徐进; 陈句; 戴建明
Original assignee: State Grid Corp of China SGCC; Guangde Power Supply Co of State Grid Anhui Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Guangde Power Supply Co of State Grid Anhui Electric Power Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-02-08
Anticipated expiration: 2031-05-18

Abstract

The utility model provides a one-inlet two-outlet 35kV protection control device which comprises a device cabinet body, wherein a cabinet body rain cover is arranged at the top of the device cabinet body, device cabinet doors are arranged on three sides of the device cabinet body, a sulfur hexafluoride gas tank is arranged inside the device cabinet body and comprises a master control gas tank arranged in the middle and main transformer gas tanks arranged on two sides of the master control gas tank, and a pressure gauge and a sulfur hexafluoride relay for displaying the gas pressure of sulfur hexafluoride are arranged on the master control gas tank and the main transformer gas tanks. The utility model is beneficial to ensuring the normal supply of electricity and ensuring the domestic electricity through the one-in two-out mode, is safe and time-efficient and electricity-leakage through the grounding operation, can be used as a 35kV bus device for various experiments and 11kV substation bypasses under the sulfur hexafluoride atmosphere, can also be used as a supplementary 35kV power supply point, greatly shortens the working time of field operation personnel, is beneficial to improving the working efficiency of the whole circuit, and has practicability and creativity.

Description

One advances two 35kV protection control device

Technical Field

The utility model relates to the technical field of power system equipment, in particular to a one-input two-output 35kV protection control device.

Background

With the rapid development of Chinese economy, society and enterprises increasingly have outstanding requirements on high-quality power systems, but due to the fact that most regional power grid structures are weak, problems such as insufficient power supply capacity, low power supply quality and difficulty in operation and maintenance are obviously caused at present, and the requirements of people on the high-quality power systems are more obvious due to the excitation of the problems.

In the existing high-voltage distribution line, an outdoor vacuum circuit breaker is usually arranged on a column, a high-voltage cable distribution box is arranged at the lower opening of the circuit breaker, and distribution equipment such as a box-type substation is arranged at the lower opening of the distribution box. Generally, the cable distribution box is manufactured by utilizing an insulator and a copper bar, a certain safety distance must be ensured relatively to each other, the shell has a large appearance, the safety coefficient is low, the occupied space is large, and the service life is short. For the outdoor vacuum circuit breaker, the installation mode has the disadvantages of severe working environment, inconvenient operation, low safety protection level and easy occurrence of various safety accidents.

In the existing old power distribution system, the fault diagnosis, isolation and recovery time is long, network reconstruction and self-healing cannot be realized, and the problems are directly represented as low power supply reliability and long average power failure time of power users. Traditional switch only has the electric current collection unit, there is not the voltage acquisition unit, voltage signal's collection needs external voltage acquisition control system, voltage acquisition control system is far away from switch, often need to be connected with 7 ~ 8 meters's cable, connecting cable is long, signal error is big, the precision is low, the trouble is many, and voltage acquisition control system installs alone, with switch not in same place, the installation is very complicated, if need change voltage acquisition control system, the operation is inconvenient and maintenance duration is long, still unable electrified change, the operation is maintained difficultly.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a one-in two-out 35kV protection control device, which mainly solves the problem that power supply cannot be quickly recovered when an incoming line 35kV circuit breaker and a main transformer control circuit breaker break down due to the current 35kV substation bus engineering transformation through a one-in two-out mode.

In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:

a one-inlet two-outlet 35kV protection control device is characterized in that a sulfur hexafluoride gas box is arranged inside a device cabinet body, the sulfur hexafluoride gas box comprises a master control gas box arranged in the middle and main transformer gas boxes arranged on two sides of the master control gas box, and sulfur hexafluoride relays are arranged on the master control gas box and the main transformer gas boxes; a master control device is arranged in the master control gas box, a shielding type master control current plug and pull head seat is arranged at the front end of the master control device, a shielding type current plug and pull head is connected onto the shielding type master control current plug and pull head seat, and the shielding type master control current plug and pull head seat is connected with a master control load switch through a software cable; the main transformer is arranged in the main transformer gas tank, the front end of the main transformer is provided with a protection circuit breaker, the protection circuit breaker is connected with an isolation/grounding switch through a soft cable, the downstream of the isolation/grounding switch is connected with two sets of front current transformers and a comprehensive protector, the downstream of each front current transformer is connected with a zero sequence current transformer, the downstream of each zero sequence current transformer is connected with a shielding type outgoing line plug head seat, and a shielding type outgoing line plug head is connected onto the shielding type outgoing line plug head seat.

Preferably, the control device comprises a device cabinet body, a cabinet body rainproof cover is arranged at the top of the device cabinet body, and a device cabinet door is arranged on the device cabinet body.

Preferably, the base of the device cabinet body is provided with a roller, and the roller comprises two directional wheels arranged at the front part and two brake wheels arranged at the rear part.

Preferably, pressure gauges for displaying the pressure of sulfur hexafluoride gas are mounted on the master control gas box and the main gas box of the sulfur hexafluoride gas box.

Preferably, insulation supporting pieces are arranged inside a master control gas box and a main transformer gas box of the sulfur hexafluoride gas box, and a cabinet penetrating insulation sleeve is arranged on the wall surface between the master control gas box and the main transformer gas box.

Preferably, cable mounting holes are formed in the front portion and the two sides of the sulfur hexafluoride gas box, and cable protection rings are arranged on the cable mounting holes.

Preferably, a fault indicator and a rear connector lightning arrester are installed on a master control gas box of the sulfur hexafluoride gas box; and a master control gas box and a main transformer gas box of the sulfur hexafluoride gas box are respectively provided with a high-voltage electrified display and a condensation controller.

Preferably, parallel copper bars are arranged on three surfaces of the main control air box and the main transformer air box facing the cabinet door of the device, and the tail ends of the parallel copper bars are connected with the grounding copper bars; one end of the grounding copper bar is connected with the parallel copper bar, and the other end of the grounding copper bar is connected with a steel rod grounding rod connected with the rear connector lightning arrester.

Preferably, the rear part of the device cabinet body is provided with a gas box air inlet hole and a gas box exhaust hole, and the gas box air inlet hole and the gas box exhaust hole are connected with a sulfur hexafluoride gas box in the device cabinet body.

Preferably, the shielding type master control current plug-in base and the shielding type outgoing line plug-in base comprise an external insulating sleeve layer, an internal conductor conducting layer and a spring limiting card arranged between the external insulating sleeve layer and the internal conductor conducting layer; and the shielding type master control current plug head seat and the shielding type outgoing line plug head seat are provided with dustproof insulating covers.

Preferably, the high-voltage charged display comprises a display module, a processing module, an operation module and a connection module; the processing module is electrically connected with the control display module, the operation module and the connecting module, and the connecting module is electrically connected with the master control load switch, the protection circuit breaker, the isolating/grounding switch, the current transformer, the comprehensive protector, the zero sequence current transformer, the fault indicator, the condensation controller and the sulfur hexafluoride relay.

The utility model has the beneficial effects that: this device simple structure is practical, and the simple operation has good practicality and maneuverability, has wide market value and application prospect, has a bit including following technique:

1. the one-in two-out 35kV protection control device is provided with a shielding type quick plug head and a quick plug seat through a one-in two-out mode, shunting and voltage-dividing operation of a cable is realized, the quick plug head replaces a bus disconnecting link, quick insulation plug is realized, and whether quick plug is normally connected or works is displayed through a strip point;

2. the device can protect the whole circuit by dividing the current of the 35kV cable into two parts through the circuit breaker and the isolating/grounding switch, realize grounding operation through the copper bar and the grounding rod and realize grounding double protection;

3. when the load is increased, the normal supply of electricity is ensured through quick plug-in connection, the domestic electricity is ensured, the gas box is filled with insulating sulfur hexafluoride gas, various protective components are integrated inside, and the device is safe, time-efficient, insulating and electricity-tight;

4. the device is used as a 35kV bus device, is used for various experiments and 11kV transformer substation bypasses under the atmosphere of sulfur hexafluoride, and can also be used as a supplementary 35kV power supply point, so that the working time of field operation personnel is greatly shortened, and the working efficiency of the whole circuit work is improved;

5. the device shortens the distance between the voltage acquisition control system and the power switch through a one-in two-out mode, effectively reduces signal errors, improves the precision, simplifies the installation process, realizes convenient operation, reduces the maintenance time and reduces the maintenance difficulty.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a one-in two-out 35kV protection control device of the present invention.

Fig. 2 is a schematic rear view of a one-in two-out 35kV protection control device according to the present invention.

Fig. 3 is a schematic structural diagram of a primary view of a one-in two-out 35kV protection control device of the present invention.

Fig. 4 is a schematic side view of a one-in two-out 35kV protection control device of the present invention.

Fig. 5 is a schematic diagram of the internal structure of the one-in two-out 35kV protection control device of the present invention.

Fig. 6 is a schematic structural diagram of a shielding type master control current plug head seat of the one-in two-out 35kV protection control device of the utility model.

Fig. 7 is a schematic structural diagram of a shielding type current plug head of the one-in two-out 35kV protection control device of the present invention.

Fig. 8 is a schematic diagram of a structure of a shielded outlet plug header of the one-in two-out 35kV protection control device of the present invention.

Fig. 9 is a schematic structural diagram of a shielded outlet plug of the one-in two-out 35kV protection control device of the present invention.

In the figure: 1. an apparatus cabinet body; 2. a rain cover of the cabinet body; 3. a device cabinet door; 4. a sulfur hexafluoride gas tank; 5. a master control gas box; 6. a main transformer air box; 7. a shielding type master control current plug head seat; 8. a shielded current plug; 9. a pressure gauge; 10. a master control load switch; 11. a protection circuit breaker; 12. an isolation/grounding switch; 13. a front current transformer; 14. a comprehensive protector; 15. A zero sequence current transformer; 16. a shielding type outgoing line plugging head seat; 17. a shielded outlet plug; 18. a directional wheel; 19. a brake wheel; 20. an insulating support; 21. penetrating a cabinet insulating sleeve; 22. a cable mounting hole; 23. a cable protection ring; 24. a fault indicator; 25. a rear connector arrester; 26. a high voltage live display; 27. a condensation controller; 29. copper bars are connected in parallel; 30. A ground copper bar; 31. a steel rod ground rod; 32. a gas tank inlet; 33. a gas tank vent; 34. an insulating jacket layer; 35. a conductive layer; 36. a spring limit clamp; 37. and an insulating cover.

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.

Example 1

As shown in fig. 1-5, a one-inlet two-outlet 35kV protection control device, a sulfur hexafluoride gas tank 4 is arranged inside a device cabinet 1, the sulfur hexafluoride gas tank 4 includes a master control gas tank 5 arranged in the middle and main transformer gas tanks 6 arranged at two sides of the master control gas tank 5, and a pressure gauge 9 and a sulfur hexafluoride relay 28 for displaying the pressure of sulfur hexafluoride gas are respectively installed on the master control gas tank 5 and the main transformer gas tanks 6.

Further, the total control device is arranged in the total control air box 5, the front end of the total control device is provided with a shielding type total control current plug base 7, the shielding type total control current plug base 7 is connected with a shielding type current plug head 8, and the shielding type total control current plug base 7 is connected with a total control load switch 10 through a software cable.

Further, a main transformer device is arranged inside the main transformer gas tank 6, a protection circuit breaker 11 is arranged at the front end of the main transformer device, the protection circuit breaker 11 is connected with an isolation/grounding switch 12 through a soft cable, two sets of front current transformers 13 and a comprehensive protector 14 are connected at the downstream of the isolation/grounding switch 12, a zero sequence current transformer 15 is connected at the downstream of the front current transformers 13, a shielding type outlet plug head seat 16 is connected at the downstream of the zero sequence current transformer 15, and a shielding type outlet plug head 17 is connected on the shielding type outlet plug head seat 16.

Further, the control device comprises a device cabinet body 1, a cabinet body rain cover 2 is arranged at the top of the device cabinet body 1, and a device cabinet door 3 is arranged on the device cabinet body 1.

Further, rollers are arranged on the base of the device cabinet 1, and the rollers comprise two directional wheels 18 arranged at the front part and two brake wheels 19 arranged at the rear part.

Furthermore, insulation support pieces 20 are arranged inside a master control gas box 5 and a main transformer gas box 6 of the sulfur hexafluoride gas box 4, and a cabinet penetrating insulation sleeve 21 is arranged on the wall surface between the master control gas box 5 and the main transformer gas box 6.

Further, cable mounting holes 22 are formed in the front and two sides of the sulfur hexafluoride gas tank 4, and cable protection rings 23 are arranged on the cable mounting holes 22.

Further, a fault indicator 24 and a rear connector lightning arrester 25 are mounted on a master control gas box 5 of the sulfur hexafluoride gas box 4; the master control gas box 5 and the main gas box 6 of the sulfur hexafluoride gas box 4 are both provided with a high-voltage electrified display 26 and a condensation controller 27.

Further, parallel copper bars 29 are arranged on three surfaces of the main control air box 5 and the main transformer air box 6 facing the device cabinet door 3, and the tail ends of the parallel copper bars 29 are connected with a grounding copper bar 30.

Further, one end of the grounding copper bar 30 is connected with the parallel copper bar 29, and the other end is connected with the steel rod grounding rod 31 connected with the rear connector lightning arrester 25.

Further, the rear part of the device cabinet body 1 is provided with a gas tank air inlet 32 and a gas tank air outlet 33, and the gas tank air inlet 32 and the gas tank air outlet 33 are connected with the sulfur hexafluoride gas tank 4 inside the device cabinet body 1.

As shown in fig. 6-9, the shielded master control current plug header 7 and the shielded outlet plug header 16 include an external insulating sheath layer 34, an internal conductive layer 35, and a spring position-limiting card 36 therebetween; and the shielding type master control current plug head seat 7 and the shielding type outgoing line plug head seat 16 are provided with dustproof insulating covers 37.

Further, the high-voltage live display 26 comprises a display module, a processing module, an operation module and a connection module; the processing module is electrically connected with the control display module, the operation module and the connecting module, and the connecting module is electrically connected with the master control load switch 10, the protection circuit breaker 11, the isolating/grounding switch 12, the front current transformer 13, the comprehensive protector 14, the zero sequence current transformer 15, the fault indicator 24, the condensation controller 27 and the sulfur hexafluoride relay 28.

A complete set of circuit breakers with wire inlet and outlet disconnecting switches are fixed on a left gas cabinet and a right gas cabinet in the device in the same way, two groups of disconnecting switches on the wire outlet side are provided with grounding disconnecting switches, a left 35kV wire outlet and a right 35kV wire outlet are protection circuit breakers, the capacity is 1250A, a front current transformer is 500/5, a gas pressure meter, a gas inlet and outlet hole are installed in a box body in the same way, and an internal insulation support piece is fixed; three cabinet screens are respectively provided with a protection device, which is provided with a differential, non-electric quantity quick break, overcurrent, local, remote and spring operating mechanism, controls three circuit breakers, is configured with a power supply control wire and a current monitoring wire, monitors after a microcomputer, is connected into a whole, and is provided with a screen opening and a grounding layer, wherein a master control current plug is a 240A soft core single cable, and an outgoing line plug cable is a 150A soft core single cable;

the fast plug head seat is externally made of titanium alloy material and serves as an insulator material to match with an external kit, an internal connecting conductor is formed by pressing a cable with red copper, an insulating layer, a semiconductor, a silica gel conducting layer and a plug seat are sleeved with an internal marble limiting card in a matching manner, and after the plug head is connected with the cable, the plug head is plugged to a certain depth and locked with the fast plug seat to complete a plug task;

the device bottom half many places ground point, the box height is 1.8 meters, and the width is 1.7 meters, and thickness is 1.6 meters, and 4 wheels of bottom configuration, plus rain-proof cover mainly use outdoors, and inside reserve ground conductor arrives the assigned position when the device uses.

When the device is used, a power-off line work ticket is firstly made, a 35kV side line is fed, electricity is tested according to a program, after no electricity is confirmed, an incoming line disconnecting link is connected to the side of the 35kV line connected with the incoming line, two groups of grounding wires are hung on two sides in an effective range, a field prefabricated wiring cable head A, B, C is connected into one group, the other end is connected with the device, when an outgoing line is butted, a 35kV protection control device is butted with two main transformers, when one main transformer is connected, the other outgoing line device A, B, C three-phase plugging port is sealed by an insulating cover, a charged body is prevented from being touched by mistake, and finally an operator removes the device and then transmits power.

In the utility model, the one-in two-out 35kV protection control device designed by the utility model realizes the division of 35kV cable current into two parts through a one-in two-out mode, can play a role in protecting the whole circuit through a circuit breaker and an isolation/grounding switch, is favorable for ensuring the normal supply of power consumption and ensuring the domestic power consumption, is safe and time-efficient and does not leak electricity through grounding operation, can be used as a 35kV bus device for various experiments and 11kV transformer substation bypasses under the atmosphere of sulfur hexafluoride, can also be used as a 35kV power supply supplementing point, greatly shortens the working time of field operation personnel, is favorable for improving the working efficiency of the whole circuit, and has the advantages of simple and practical structure, convenient operation, good practicability and operability, and wide market value and application prospect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A one-inlet two-outlet 35kV protection control device is characterized in that a sulfur hexafluoride gas tank (4) is arranged inside a device cabinet body (1), the sulfur hexafluoride gas tank (4) comprises a master control gas tank (5) arranged in the middle and main transformer gas tanks (6) arranged on two sides of the master control gas tank (5), and sulfur hexafluoride relays (28) are arranged on the master control gas tank (5) and the main transformer gas tanks (6);

a master control device is arranged in the master control gas box (5), a shielding type master control current plug and pull head seat (7) is arranged at the front end of the master control device, a shielding type current plug and pull head (8) is connected onto the shielding type master control current plug and pull head seat (7), and the shielding type master control current plug and pull head seat (7) is connected with a master control load switch (10) through a software cable;

the transformer is characterized in that a main transformer device is arranged in the main transformer gas box (6), a protection circuit breaker (11) is arranged at the front end of the main transformer device, the protection circuit breaker (11) is connected with an isolation/grounding switch (12) through a flexible cable, the downstream of the isolation/grounding switch (12) is connected with two sets of front current transformers (13) and a comprehensive protector (14), the downstream of each front current transformer (13) is connected with a zero sequence current transformer (15), the downstream of each zero sequence current transformer (15) is connected with a shielding type outlet plug head seat (16), and a shielding type outlet plug head (17) is connected onto the shielding type outlet plug head seat (16).

2. The one-in two-out 35kV protection and control device as claimed in claim 1, wherein the control device comprises a device cabinet body (1), a cabinet body rain cover (2) is arranged at the top of the device cabinet body (1), and a device cabinet door (3) is arranged on the device cabinet body (1);

the base of the device cabinet body (1) is provided with rollers, and the rollers comprise two directional wheels (18) arranged at the front part and two brake wheels (19) arranged at the rear part.

3. The one-in two-out 35kV protection and control device as claimed in claim 1, wherein a master control box (5) and a main transformer box (6) of the sulfur hexafluoride gas box (4) are respectively provided with a pressure gauge (9) for displaying the pressure of the sulfur hexafluoride gas;

insulation support pieces (20) are arranged inside a master control gas box (5) and a main transformer gas box (6) of the sulfur hexafluoride gas box (4), and a cabinet penetrating insulation sleeve (21) is arranged on the wall surface between the master control gas box (5) and the main transformer gas box (6).

4. The one-in two-out 35kV protection and control device as claimed in claim 3, wherein cable mounting holes (22) are formed in the front and two sides of the sulfur hexafluoride gas box (4), and cable protection rings (23) are arranged on the cable mounting holes (22).

5. The one-in two-out 35kV protection and control device as claimed in claim 3, wherein a fault indicator (24) and a rear joint lightning arrester (25) are mounted on a master control gas box (5) of the sulfur hexafluoride gas box (4);

and a master control gas box (5) and a main transformer gas box (6) of the sulfur hexafluoride gas box (4) are respectively provided with a high-voltage electrified display (26) and a condensation controller (27).

6. The one-in two-out 35kV protection and control device according to claim 1, wherein parallel copper bars (29) are arranged on three surfaces of the main air box (5) and the main air box (6) facing the device cabinet door (3), and the tail ends of the parallel copper bars (29) are connected with the grounding copper bars (30).

7. The one-in two-out 35kV protection and control device according to claim 6, wherein one end of the grounding copper bar (30) is connected with the parallel copper bar (29), and the other end is connected with a steel rod grounding rod (31) connected with the rear connector lightning arrester (25).

8. The one-in two-out 35kV protection and control device as claimed in claim 1, wherein a gas tank inlet hole (32) and a gas tank outlet hole (33) are formed in the rear portion of the device cabinet body (1), and the gas tank inlet hole (32) and the gas tank outlet hole (33) are connected with a sulfur hexafluoride gas tank (4) inside the device cabinet body (1).

9. The one-in two-out 35kV protection and control device as claimed in claim 1, wherein the shielding type master control current plug head base (7) and the shielding type outlet plug head base (16) comprise an insulating sleeve layer (34) arranged outside, a conductor conducting layer (35) inside and a spring limit card (36) arranged between the insulating sleeve layer and the conductor conducting layer;

and the shielding type master control current plug head seat (7) and the shielding type outgoing line plug head seat (16) are provided with dustproof insulating covers (37).

10. The one-in two-out 35kV protection and control device according to claim 5, wherein the high-voltage live display (26) comprises a display module, a processing module, an operation module and a connection module;

the processing module is electrically connected with the control display module, the operation module and the connecting module, and the connecting module is electrically connected with the master control load switch (10), the protection circuit breaker (11), the isolation/grounding switch (12), the current transformer (13), the comprehensive protector (14), the zero sequence current transformer (15), the fault indicator (24), the condensation controller (27) and the sulfur hexafluoride relay (28).