CN113488874A - Layout structure of 10kV full-handcart hybrid direct-current load complete switch - Google Patents

Abstract

The invention relates to a layout structure of a 10kV full-handcart hybrid direct-current load complete switch, which comprises a metal armored cabinet body, wherein the metal armored cabinet body comprises four independent compartments, namely a switch chamber, a bus chamber, a cable chamber and a secondary chamber; a handcart type main branch switch, a handcart type auxiliary branch switch, an auxiliary branch heavy-load connector and a main branch heavy-load connector are arranged in the switch chamber, and the handcart type main branch switch is positioned above the handcart type auxiliary branch switch; the handcart type main branch switch is pushed into the upper part of the switch chamber along a matched guide rail and is spliced with the contact box; the handcart type auxiliary branch switch is pushed into the lower part of the switch chamber along the matched guide rail and is spliced with the loop conductor. Compared with the prior art, the layout structure of the invention obviously improves the space utilization rate, has compact structure and reasonable layout, greatly reduces the volume of the switch cabinet, reduces the occupied area and reduces the manufacturing cost.

Description

Layout structure of 10kV full-handcart hybrid direct-current load complete switch

Technical Field

The invention relates to the technical field of direct current load switches, in particular to a layout structure of a 10kV full-handcart hybrid direct current load complete switch.

Background

The development and utilization scale of global renewable energy is continuously enlarged, the application cost is rapidly reduced, the renewable energy becomes the core content of energy transformation promotion and an important way for coping with climate change in many countries, and the renewable energy is also an important measure for promoting energy production and consumption revolution and energy transformation in China. The wind power generation and the solar power generation have the characteristics of intermittence and randomness, and meanwhile, the self absorption capacity of a power system is limited, so that the phenomena of wind abandonment, light abandonment and the like occur. Therefore, the biggest bottleneck in the development of new energy is the transmission and consumption of electricity.

The 10kV direct current load complete switch is indispensable electrical equipment for the development of a flexible direct current power distribution network, is mainly used for switching on/off direct current load current and certain overload current, is mainly suitable for frequent operation requiring rated working current in the direct current power distribution network, and has important significance for guaranteeing safe and reliable operation of the power distribution network. As the research and the start of China on the direct current load switch are relatively late, the existing direct current load switch cabinet is mostly used for a 0.75-1.5 kV low-voltage class cabinet for domestic urban rail transit traction, and a 10kV direct current load switch cabinet for a power distribution network is relatively deficient; meanwhile, the system can be divided into a mechanical type, a solid state type and a mixed type according to a topological structure and a breaking principle. The mechanical direct-current load switch has low conduction loss, but has high mechanical and electrical stress, relatively low on-off speed and high on-off dispersity; the solid-state direct-current load switch has extremely high switching speed, but has large on-state loss and high cost. The hybrid dc load switch has low current loss and quick insulation recovery of the mechanical dc load switch, and quick on/off of the solid-state dc load switch, and is one of the main development directions.

The prior art 10kV direct current load switch cabinet has two technical schemes:

the first scheme is as follows: the cabinet body of the fixed direct current load complete switch adopts a traditional welding mode, and electric equipment, a bus, a current-carrying conductor, an insulator and the like of each loop are assembled and fixed in a closed or semi-closed metal cabinet according to a topological structure and a breaking principle. This scheme simple structure, but the security is low, does not possess the operation continuity function, overhauls the fortune dimension complicacy, wastes time and energy.

The second scheme is as follows: chinese patent with application number 202010467816.0 discloses a net mechanical type load switch cabinet is joined in marriage to magnetic coupling type, and its principle is mechanical type, and the switching machinery and the electric stress of this scheme are high, and it is relatively slow to cut off speed, and it is great to cut off the dispersibility, and this scheme arrangement mode arranges for controlling simultaneously, does not also possess the operation continuity function, and area is big, and the operation maintenance is overhauld complicacy, and is with high costs etc. is unfavorable for product market and promotes.

Based on the above problem, the application provides a layout structure of a 10kV full-handcart hybrid direct-current load complete switch.

Disclosure of Invention

The invention is realized by the following technical scheme, and provides a layout structure of a 10kV full-handcart hybrid direct-current load complete switch, which comprises a metal armored cabinet body, wherein the metal armored cabinet body comprises four independent compartments, namely a switch chamber, a bus chamber, a cable chamber and a secondary chamber; a handcart type main branch switch, a handcart type auxiliary branch switch, an auxiliary branch heavy-load connector and a main branch heavy-load connector are arranged in the switch chamber, and the handcart type main branch switch is positioned above the handcart type auxiliary branch switch; the handcart type main branch switch is pushed into the upper part of the switch chamber along a matched guide rail and is spliced with the contact box; the handcart type auxiliary branch switch is pushed into the lower part of the switch chamber along the matched guide rail and is spliced with the loop conductor.

Preferably, the switch chamber, the bus chamber and the cable chamber are provided with independent pressure relief channels.

Preferably, a direct current cable terminal, a shielding sleeve, a contact box, a grounding switch, a line arrester and a control and protection device are arranged in the cable chamber.

Preferably, a busbar wall bushing is provided in the busbar compartment.

Preferably, the bus chamber is internally provided with a positive bus, a zero bus and a negative bus.

Preferably, the handcart type main branch switch comprises a quick mechanical switch and a chassis, and the quick mechanical switch is mounted on the chassis.

Preferably, the handcart type auxiliary branch switch comprises an electronic switch, a current conversion device, an energy consumption device and a chassis, and the electronic switch, the current conversion device and the energy consumption device are all installed and fixed on the chassis.

The invention has the beneficial effects that:

1. compared with the prior art, the layout structure of the invention obviously improves the space utilization rate, has compact structure and reasonable layout, greatly reduces the volume of the switch cabinet, reduces the occupied area and reduces the manufacturing cost;

2. the full-manual scheme is simple and convenient to operate, maintain and repair;

3. the product can easily realize serialization and standardization, and has the characteristics of good assembly quality, high speed and high operation reliability. Meanwhile, the scheme lays a foundation for market promotion of products.

Drawings

FIG. 1 is a schematic diagram of a front view structure of a cabinet for a 10kV full-handcart hybrid direct-current load complete switch;

FIG. 2 is a schematic structural diagram of a side view of a cabinet body for a 10kV all-handcart hybrid direct-current load complete switch;

FIG. 3 is a schematic diagram of a front view structure of a layout structure of a 10kV full-hand vehicle hybrid direct-current load complete set switch;

FIG. 4 is a schematic diagram of a side view of the layout structure of the 10kV full-hand vehicle hybrid DC load complete switch of the invention;

shown in the figure:

11. the device comprises a metal armored cabinet body, 12, a switch chamber, 13, a cable chamber, 14, a bus chamber, 15, a pressure relief channel, 16, a secondary chamber, 21, a handcart type main branch switch, 22, a handcart type auxiliary branch switch, 23, an auxiliary branch heavy-load connector, 24, a direct current cable terminal, 25, a shielding sleeve, 26, a contact box, 27, a bus wall-through sleeve, 210, a main branch heavy-load connector, 211, a grounding switch, 212, a line arrester, 213 and a control protection device.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in fig. 1 to 3, the invention includes a metal-clad cabinet 11, where the metal-clad cabinet 11 includes four independent compartments, i.e., a switch chamber 12, a bus chamber 14, a cable chamber 13, and a secondary chamber 16, and the switch chamber 12, the bus chamber 14, and the cable chamber 13 all have independent pressure relief channels 15. The pressure relief channel 15 is designed at the top of the cabinet body, when internal fault electric arcs are generated, the pressure relief device is reliably opened, and personnel and other equipment are reliably avoided in the pressure relief direction.

The metal armored cabinet body 11 is a high-voltage switch cabinet of an LSC2 type (with a function of operating continuity), that is, when any one of the accessible compartments of the functional units is opened (except for the bus compartment), all other functional units can still continue to operate normally with electricity. The metal armored cabinet body 11 should be an IAC-level (internal fault level) product, and when the switch cabinet is selected, the bus chamber, the circuit breaker chamber and the cable chamber should be determined to be independent from each other and all pass through corresponding internal arcing tests. The metal armored cabinet body 11 should meet the requirements of five prevention and interlocking.

A handcart type main branch switch 21, a handcart type auxiliary branch switch 22, an auxiliary branch heavy-load connector 23 and a main branch heavy-load connector 210 are arranged in the switch chamber 12, and the handcart type main branch switch 21 is positioned above the handcart type auxiliary branch switch 22. In the cable compartment 13, a dc cable termination 24, a shielding sleeve 25, a contact box 26, an earthing switch 211, a line arrester 212 and a control and protection device 213 are arranged. A busbar wall bushing 27 is provided in the busbar compartment 14. The direct current cable terminal 24 is a special device for accessing an external cable into the cabinet body; the shielding sleeve 25 is used when an inner conductor in loop connection crosses a compartment, so that the insulation safety is ensured; the contact box 26 is internally provided with a contact for connecting a loop conductor; the bus wall bushing 27 is used for bus connection between cabinets to ensure insulation safety; the line arrester 212 is a special line protection device, and the grounding switch 212 is a single pole and can be operated manually or electrically. In the present embodiment, the handcart-type main branch switch 21, the handcart-type auxiliary branch switch 22, the auxiliary branch heavy-duty connector 23, the main branch heavy-duty connector 210, the control and protection device 213, and the dc cable terminal 24 all adopt the existing structure.

The handcart type main branch switch 21 is pushed into the upper part of the switch chamber 12 along a matched guide rail and is inserted with the contact box 26. The handcart type auxiliary branch switch 22 is pushed into the lower part of the switch chamber 12 along a matched guide rail and is inserted with a loop conductor.

A positive bus, a zero bus and a negative bus are arranged in the bus chamber 14, and the buses select proper conductive copper bars according to the actual through-flow size; the space between the buses with various polarities meets the air insulation requirement, and the buses realize the copper bar connection between the cabinets through bus wall-penetrating sleeves.

Handcart-type owner branch switch 21 includes quick mechanical switch and chassis car, and quick mechanical switch installs to the chassis car on, adopts the integral structure to arrange, and the chassis car is manual or electrically operated all can. The handcart type auxiliary branch switch 22 comprises an electronic switch, a current conversion device, an energy consumption device and a chassis vehicle, wherein the electronic switch, the current conversion device and the energy consumption device are all installed and fixed on the chassis vehicle and are arranged in an integrated structure, and the chassis vehicle can be operated manually or electrically.

The layout structure remarkably improves the space utilization rate, has compact structure and reasonable layout, greatly reduces the volume of the switch cabinet, reduces the occupied area and reduces the manufacturing cost; the full-manual scheme is simple and convenient to operate, maintain and repair; the product can easily realize serialization and standardization, and has the characteristics of good assembly quality, high speed and high operation reliability. Meanwhile, the scheme lays a foundation for market promotion of products.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.

Claims (7)

1. The utility model provides a layout structure of full handcart hybrid direct current load complete sets switch of 10kV which characterized in that: the metal armored cabinet comprises a switch chamber, a bus chamber, a cable chamber and a secondary chamber, wherein the switch chamber, the bus chamber, the cable chamber and the secondary chamber are independent compartments; a handcart type main branch switch, a handcart type auxiliary branch switch, an auxiliary branch heavy-load connector and a main branch heavy-load connector are arranged in the switch chamber, and the handcart type main branch switch is positioned above the handcart type auxiliary branch switch; the handcart type main branch switch is pushed into the upper part of the switch chamber along a matched guide rail and is spliced with the contact box; the handcart type auxiliary branch switch is pushed into the lower part of the switch chamber along the matched guide rail and is spliced with the loop conductor.

2. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 1, characterized in that: the switch chamber, the bus chamber and the cable chamber are all provided with independent pressure relief channels.

3. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 2, characterized in that: a direct current cable terminal, a shielding sleeve, a contact box, a grounding switch, a line arrester and a control protection device are arranged in a cable chamber.

4. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 3, characterized in that: and a bus wall bushing is arranged in the bus chamber.

5. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 1, characterized in that: and a positive bus, a zero bus and a negative bus are arranged in the bus chamber.

6. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 1, characterized in that: the handcart type main branch switch comprises a quick mechanical switch and a chassis vehicle, and the quick mechanical switch is installed on the chassis vehicle.

7. The layout structure of the 10kV all-hand vehicle hybrid direct-current load complete switch set according to claim 6, characterized in that: the handcart type auxiliary branch switch comprises an electronic switch, a current conversion device, an energy consumption device and a chassis vehicle, wherein the electronic switch, the current conversion device and the energy consumption device are all installed and fixed on the chassis vehicle.

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