CN211428612U - A high-voltage switch cabinet structure - Google Patents

Abstract

The utility model discloses a high-voltage switch cabinet structure, which belongs to a high-voltage electrical appliance. A high-voltage switch cabinet structure includes a main cabinet and an auxiliary cabinet, the main cabinet includes a main busbar and a tie circuit, the auxiliary cabinet includes a backup busbar and an isolation switch, and the main cabinet is connected to the auxiliary cabinet through the tie circuit. The isolation switch includes a first switch, a second switch, a grounding switch and an output terminal; the first switch is closed, the second switch is open, and when the grounding knife is open, the main busbar Power supply; the first switch is open, the second switch is closed, and the grounding switch is open, the standby bus is powered, and the power supply switching of the main and standby lines is realized by controlling the isolation switch. In case of failure, the circuit is powered by another cabinet to achieve non-stop maintenance.

Description

A high-voltage switch cabinet structure

technical field

The utility model relates to the field of high-voltage electrical appliances, in particular to the structure of a high-voltage switch cabinet.

Background technique

High-voltage switchgear refers to the functions of on-off, control or protection in the power generation, transmission, distribution, power conversion and consumption of the power system. The high-voltage switchgear is used as electrical products with a voltage level of 3.6kV ~ 550kV. And grounding switch, high-voltage load switch, high-voltage automatic reclosing and sectionalizer, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switchgear and other categories. The switchgear has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, and busbar connection.

At present, many problems are exposed in the actual operation of the high-voltage switchgear, which restricts the improvement of power supply reliability, and the load cannot be flexibly adjusted between the various busbars; when the high-voltage switchgear fails, the high-voltage switchgear needs to be powered off for maintenance and repair, which cannot be Quickly isolate and restore power supply; power failure is also required when replacing components in the cabinet such as current transformers; thus affecting the power supply of the entire line.

Utility model content

The purpose of the utility model is to provide a high-voltage switch cabinet structure to solve the problem that the entire circuit needs to be shut down for maintenance when the components of the high-voltage switch cabinet fail.

For this purpose, the utility model adopts the following technical solutions:

A high-voltage switch cabinet structure includes a main cabinet and an auxiliary cabinet, the main cabinet includes a main busbar and a tie circuit, the auxiliary cabinet includes a backup busbar and an isolation switch, and the main cabinet is connected to the auxiliary cabinet through the tie circuit. electrical connection;

The isolation switch includes a first switch, a second switch, a grounding switch and an output terminal;

The first switch is closed, the second switch is open, and when the grounding switch is open, the main bus is powered;

The first switch is open, the second switch is closed, when the grounding switch is open, the backup bus is powered, and when the high-voltage switchgear is in normal use, the power is input from the main bus and the tie circuit conducts the isolation switch. , the first switch of the isolation switch is closed, the second switch and the grounding switch are open, the main busbar and the output terminal of the isolation switch are connected, and the power supply is supplied by the main busbar; when the main cabinet fails, the first switch is opened, and the main cabinet stops power supply , the second switch is closed, the grounding switch is opened, the backup busbar and the output terminal of the isolation switch are connected, and the backup busbar supplies power at this time, and the power supply switching of the main and backup lines is realized by controlling the isolation switch. , the circuit is powered by another cabinet to achieve non-stop maintenance.

Optionally, the isolation switch includes an operating mechanism and a circuit control mechanism, the operating mechanism has an operating lever, and the operating mechanism is respectively linked with the first switch, the second switch and the grounding switch, so The operating mechanism is electrically connected with the circuit control mechanism to realize both manual operation and electric control of the isolation switch.

Optionally, the main cabinet and the auxiliary cabinet are arranged side by side separately, the communication circuit is a cable, an underground cable channel is arranged between the main cabinet and the auxiliary cabinet, and the main and auxiliary cabinets work independently of each other. interference.

Optionally, a maintenance channel is preset between the main cabinet and the auxiliary cabinet, and the maintenance channel is convenient for manual maintenance.

Optionally, the main cabinet and the auxiliary cabinet are spliced and installed in an integrated structure, the communication circuit is a cable, and an underground cable channel is arranged between the main cabinet and the auxiliary cabinet, and the integrated cabinet can save energy. space.

Optionally, the main cabinet and the auxiliary cabinet are spliced and installed in an integrated structure, the communication circuit is a copper bar, the main cabinet is provided with a first installation hole, and the auxiliary cabinet is provided with a second installation hole, One end of the copper bar is electrically connected to the main cabinet through the first installation hole, and the other end of the copper bar is electrically connected to the auxiliary cabinet through the second installation hole, and the structure of the copper bar is simple , the cost is lower.

Optionally, the main cabinet further includes a circuit breaker and an electric chassis, the bottom of the electric chassis is provided with a guide rail, the circuit breaker is provided on the top surface of the chassis, and the circuit breaker is provided with a circuit breaker for electrical connection. The first contact of the main busbar and the second contact for electrically connecting the tie circuit.

Optionally, the first contact and the second contact are both quincunx contacts, and the quincunx contacts realize quick plug connection.

Optionally, the main busbar is a tubular busbar, a ventilation device is arranged on the left side of the tubular busbar, a ventilation port is arranged on the right side of the tubular busbar, and a circulating air duct is formed in the center of the tubular busbar, The main busbar facilitates heat dissipation.

Optionally, both the main cabinet and the auxiliary cabinet are provided with a plurality of independent chambers for accommodating circuit components, the independent chambers are provided with a space margin, and the independent chambers are convenient for heat dissipation.

Compared with the prior art, the utility model has the following beneficial effects: when the high-voltage switchgear is in normal use, the power is input from the main busbar and the tie circuit conducts the isolation switch, the first switch of the isolation switch is closed, the second switch and the grounding switch are closed. Open, the main busbar and the output terminal of the isolation switch are connected, and the main busbar supplies power at this time; when the main cabinet fails, the first switch is opened, the main cabinet stops power supply, the second switch is closed, the grounding switch is opened, and the backup The busbar and the output terminal of the isolation switch are connected, and the power supply is supplied by the standby busbar at this time. The power supply switching of the main and standby lines is realized by controlling the isolation switch. When one cabinet fails, the circuit is powered by the other cabinet to achieve non-stop maintenance. .

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

The structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention. Therefore, without technical substantive significance, any modification of the structure, the change of the proportional relationship or the adjustment of the size should still fall within the scope of the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. The disclosed technical content must be within the scope of coverage.

Fig. 1 is the schematic diagram of the separate main and auxiliary cabinets of the high-voltage switchgear structure;

Figure 2 is a schematic diagram of a high-voltage switchgear structure integrated cable connection main and auxiliary cabinets;

Figure 3 is a schematic diagram of the high-voltage switchgear structure integrated copper bar connecting the main and auxiliary cabinets;

Figure 4 is a schematic diagram of the rear view of the auxiliary cabinet of the high-voltage switchgear structure;

Figure 5 is a schematic diagram of the rear view of the auxiliary cabinet when the main busbar of the high-voltage switch cabinet structure is powered;

Figure 6 is a schematic diagram of the rear view of the auxiliary cabinet when the high-voltage switch cabinet structure is backed up by the busbar for power supply.

Description: main cabinet 1, auxiliary cabinet 2, main bus 11, tie circuit 12, circuit breaker 13, electric chassis 14, valve mechanism 15, current transformer 16, secondary control module 17, backup bus 21, isolation switch 22, zero sequence transformer 23, outgoing cable 24, first contact 131, second contact 131, first switch 221, second switch 222, grounding switch 223, output end 224, operating mechanism 225, circuit control mechanism 226 , The main incoming line isolation knife 2211, the standby incoming line isolation knife 2221, the standby incoming line contact 2222, and the grounding knife 2231.

Detailed ways

In order to make the purpose, features and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to the present utility model. limits. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a centered component at the same time.

The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

The embodiment of the present utility model provides a high-voltage switch cabinet structure, including a main cabinet 1 and an auxiliary cabinet 2. The main cabinet 1 includes a main bus bar 11, a circuit breaker 13, an electric chassis 14, a shutter mechanism 15, a current transformer 16, two The secondary control module 17 and the tie circuit 12, the auxiliary cabinet 2 includes a backup bus 21, an isolation switch 22, a zero-sequence transformer 23 and an outgoing cable 24 for power output, and the isolation switch 22 is electrically connected to the main bus 11 through the tie circuit 12;

The isolation switch 22 includes a first switch 221, a second switch 222, a grounding switch 223 and an output terminal 224;

When the circuit is in normal operation, the first switch 221 is closed, the second switch 222 is open, and when the grounding switch 223 is open, the circuit breaker 13 is closed, and the main bus 11 supplies power at this time; at this time, the output route of the power is: Bus 11 - circuit breaker 13 - current transformer 16 - liaison circuit 12 - isolating switch 22 - zero sequence transformer 23 - outgoing cable 24;

When the main cabinet 1 fails, the circuit breaker 13 is opened, the first switch 221 is opened, the main bus 11 stops supplying power, the second switch 222 is closed, and the grounding switch 223 is opened. The output route is: standby bus 21 - circuit breaker 13 - zero sequence transformer 23 - outgoing cable 24; it should be noted that the power transmission end can be a high-voltage electrical appliance such as a transformer.

When the entire circuit needs to be shut down, the first switch 221, the second switch 222, and the circuit breaker 13 are respectively in the open positions, the grounding switch 223 is closed, and the main and backup lines stop supplying power at this time. By controlling the isolation switch, the power supply switching of the main and standby lines is realized. When one cabinet fails, the circuit is powered by the other cabinet to achieve non-stop maintenance.

Further, the isolating switch 22 includes an operating mechanism 225 and a circuit control mechanism 226, the first switch 221 includes a main incoming line isolating knife 2211, the second switch 222 includes a spare incoming line isolating knife 2221 and a spare incoming line contact 2222, and the grounding switch 223 Including the grounding knife 2231, the operating mechanism 225 has an operating rod, the operating mechanism 225 is linked with the grounding knife 2231, the operating mechanism 225 is linked with the main incoming line isolation knife 2211 and the standby incoming line isolation knife 2221 respectively through the insulating parts, and the operating mechanism 225 is connected with the grounding knife 2231. The circuit control mechanism 226 is electrically connected, the insulating member, and the operating mechanism 225 can be linked to the grounding knife 2231, the grounding knife 2231 is rotated clockwise, the grounding knife 2231 is closed, and the outgoing wire is grounded; The operating mechanism 225 connects the main incoming line isolation knife 2211 through the insulating part, rotates the main incoming line isolating knife 2211 clockwise to realize the closing of the main incoming line isolating knife 2211, and rotates counterclockwise to connect the main incoming line isolating knife 2211, and the main incoming line is isolated Knife 2211 is switched off; the operating mechanism 225 is connected to the standby incoming line isolation knife 2221 through the insulating part, and the standby incoming line isolation knife 2221 is rotated clockwise to realize the opening of the standby incoming line isolation knife 2221, and the standby incoming line isolation knife 2221 is rotated counterclockwise. , and the isolation knife 2221 of the incoming line is closed to realize both manual operation and electric control of the isolation switch 22.

In this embodiment, the main cabinet 1 and the auxiliary cabinet 2 are arranged side by side separately, and a preset interval between the main cabinet 1 and the auxiliary cabinet 2 is used as a maintenance channel, which is convenient for manual maintenance. Specifically, the communication circuit 12 is a cable, and an underground cable channel is provided between the main cabinet 1 and the auxiliary cabinet 2. The cable passes through the main cabinet 1 and connects the auxiliary cabinet 2 from the underground cable channel, so that the main cabinet 1 and the auxiliary cabinet 2 are connected. The circuit between them is conducted, and at the same time, the work between the main cabinet 1 and the auxiliary cabinet 2 is protected from each other.

In this embodiment, the main cabinet 1 and the auxiliary cabinet 2 are spliced and installed in an integrated structure, the communication circuit 12 is a cable, the main cabinet 1 and the auxiliary cabinet 2 form an integrated structure by back-to-back splicing, and the main cabinet 1 and the auxiliary cabinet form an integrated structure. There is an underground cable channel between 2, and the integrated structure of the cabinet saves space and improves space utilization.

In this embodiment, the main cabinet 1 and the auxiliary cabinet 2 are spliced and installed in an integrated structure, the communication circuit 12 is a copper bar, the main cabinet 1 is provided with a first installation hole, the auxiliary cabinet 2 is provided with a second installation hole, and the copper bar is provided with a second installation hole. One end is electrically connected to the main cabinet 1 through the second installation hole, and the other end of the copper bar is electrically connected to the auxiliary cabinet 2 through the second installation hole. The main cabinet 1 and the auxiliary cabinet 2 form an integrated structure by back-to-back splicing. At the same time, the copper bar is used as the connection cable, no additional cable channel is needed, and the space occupied is also small, which improves the space utilization rate.

In this embodiment, the circuit breaker 13 is arranged on the upper plane of the electric chassis 14, the bottom of the electric chassis 14 is also provided with a guide rail, the guide rail is used to guide the movement of the electric chassis 14, and the circuit breaker 13 is provided with the first contact 131 and The second contact 132, when the main cabinet 1 is powered, the electric chassis 14 moves to the left along the guide rail, the circuit breaker 13 is moved and closed under the driving of the electric chassis 14, the circuit breaker 13 is closed, the first contact 131 It is electrically connected to the main busbar 11, and the second contact 132 is electrically connected to the tie circuit 12. At this time, the circuit goes from the main busbar 11 to the circuit breaker 13 to the tie circuit 12. In addition, the electric chassis 14 and the electric chassis 14 have electric operation. function.

Preferably, the first contact 131 and the second contact 132 are both quincunx contacts, and the quincunx contacts can be quickly plugged, which is convenient for the circuit breaker 13 to conduct the circuit.

Optionally, the main busbar 11 is a tubular busbar, the left side of the tubular busbar is provided with an air inlet, the air inlet is provided with ventilation equipment, the right side of the tubular busbar is provided with an air outlet, the air inlet, the center of the tubular busbar and the outlet. An air flow channel is formed between the air vents, and the air is fed from the left side of the tubular busbar and exhausted from the right side, so as to bring the heat of the busbar out of the cabinet and solve the problem of heating and temperature rise of the busbar.

Preferably, both the main cabinet 1 and the auxiliary cabinet 2 are provided with a plurality of independent chambers for accommodating circuit components, and the independent chambers are provided with a space margin. There is a certain interval, and the independent chamber is convenient for components to dissipate heat.

The technical solution of the present invention is not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to perform the technical solutions described in the foregoing embodiments. Modification, or equivalent replacement of some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A high-voltage switch cabinet structure is characterized by comprising a main cabinet (1) and an auxiliary cabinet (2), wherein the main cabinet (1) comprises a main bus (11) and an interconnection circuit (12), the auxiliary cabinet (2) comprises a standby bus (21) and an isolating switch (22), and the main cabinet (1) is electrically connected with the auxiliary cabinet (2) through the interconnection circuit (12);

the isolating switch (22) comprises a first switch (221), a second switch (222), a grounding switch (223) and an output end (224);

the first switch (221) is switched on, the second switch (222) is switched off, and when the grounding switch (223) is switched off, the main bus (11) supplies power;

the first switch (221) is switched off, the second switch (222) is switched on, and when the grounding switch (223) is switched off, the standby bus (21) supplies power.

2. The high-voltage switch cabinet structure according to claim 1, wherein the isolating switch (22) further comprises an operating mechanism (225) and a circuit control mechanism (226), the operating mechanism (225) is provided with an operating rod, the operating mechanism (225) is respectively linked with the first switch (221), the second switch (222) and the grounding switch (223), and the operating mechanism (225) is electrically connected with the circuit control mechanism (226).

3. The high-voltage switch cabinet structure according to claim 1, characterized in that the main cabinet (1) and the auxiliary cabinet (2) are separately arranged side by side, the communication circuit (12) is a cable, an underground cable channel is arranged between the main cabinet (1) and the auxiliary cabinet (2), and the cable is buried in the underground cable channel.

4. The high-voltage switchgear structure according to claim 3, characterized in that a service aisle is foreseen between said main cabinet (1) and said auxiliary cabinet (2).

5. The high-voltage switch cabinet structure according to claim 1, wherein the main cabinet (1) and the auxiliary cabinet (2) are spliced and installed into an integrated structure, the interconnection circuit (12) is a cable, an underground cable channel is arranged between the main cabinet (1) and the auxiliary cabinet (2), and the cable is buried in the underground cable channel.

6. The high-voltage switch cabinet structure according to claim 1, wherein the main cabinet (1) and the auxiliary cabinet (2) are assembled and installed into a single structure, the communication circuit (12) is a copper bar, the main cabinet (1) is provided with a first installation hole, the auxiliary cabinet (2) is provided with a second installation hole, one end of the copper bar passes through the first installation hole to be electrically connected with the main cabinet (1), and the other end of the copper bar passes through the second installation hole to be electrically connected with the auxiliary cabinet (2).

7. The high-voltage switchgear structure according to claim 1, characterized in that said main cabinet (1) further comprises a circuit breaker (13) and an electric chassis (14), the bottom of said electric chassis (14) being slidably connected with rails, said circuit breaker (13) being arranged on said chassis top surface, said circuit breaker (13) being provided with a first contact (131) for electrically connecting the main bus (11) and a second contact (132) for electrically connecting the tie circuit (12).

8. The high voltage switchgear structure according to claim 7, characterized in that the first contact (131) and the second contact (132) are both tulip contacts.

9. The high-voltage switch cabinet structure according to claim 1, wherein the main bus bar (11) is a tubular bus bar, an air inlet is arranged on the left side of the tubular bus bar, an air outlet is arranged on the right side of the tubular bus bar, and an air flow channel is formed among the air inlet, the center of the tubular bus bar and the air outlet.

10. The high-voltage switch cabinet structure according to claim 1, wherein the main cabinet (1) and the auxiliary cabinet (2) are provided with a plurality of independent chambers for accommodating circuit components, and a certain interval is reserved between the circuit components and the independent chambers.

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