CN218040443U - EVT complete set looped netowrk cabinet - Google Patents

Abstract

The utility model provides an EVT complete set looped netowrk cabinet, include instrument room, switch air chamber, mechanism room, base, circuit EVT air chamber, generating line EVT air chamber, get the electricity PT unit. The circuit EVT air chamber and the bus EVT air chamber comprise an inflation box body, an EVT, a sealing insulator and a connecting wire, and the whole body is arranged at a corresponding position of the switch air box through a bolt. The power taking PT unit is integrally positioned in the base and is separated from the cable chamber through an intermediate partition plate. The utility model discloses a novel electronic voltage transformer with get electric PT configuration scheme, realize the collection of bus side and line side voltage signal to and the power supply needs of components and parts in the cabinet, made things convenient for power calculation and relay protection logic simultaneously and judged. The integrated design of whole miniaturization to realize that whole cabinet appearance is regular, the size is miniaturized, maintain the purpose of facilitating, the reliability is high.

Description

EVT complete set looped netowrk cabinet

Technical Field

The utility model relates to a looped netowrk cabinet technical field particularly, relates to an installation EVT's complete set looped netowrk cabinet.

Background

The ring main unit is an electric device which is opened, closed, controlled and protected in the power generation, transmission, distribution and electric energy conversion process of an electric power system, the core part of the ring main unit adopts a vacuum circuit breaker, an isolating switch, a load switch and the like, the ring main unit has the advantages of compact structure, high integration level, convenience in construction and maintenance, safety in power supply and the like, and is widely applied to distribution stations and transformer substations of large-scale buildings, urban residences, enterprises and the like.

At present, the conventional ring main unit generally has the practical problems of large size, heavy weight, inconvenience in equipment installation and maintenance and the like of an electromagnetic voltage transformer. In particular, a three-phase five-column voltage Transformer used in a PT (Potential Transformer) Cabinet has a larger size and more complex insulation, directly influences the size of the PT Cabinet and the occupied area of a complete set of ring main units, and has prominent risks such as ferromagnetic resonance, explosion and the like, thereby seriously restricting the automatic construction and safe and stable operation of a power distribution network.

The requirements of voltage acquisition, safe operation and the like of the ring main unit equipment are met under the condition of limited installation size, and higher challenges are provided for the development of the ring main unit.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model provides a reliable EVT (electronic voltage transformer) complete set of ring main unit, which solves the problems that the electromagnetic voltage transformer in the prior art has large size and the PT cabinet needs to be designed separately for installation, so that the occupied area of the complete set of ring main unit is large; the electromagnetic mutual inductor is easy to generate ferromagnetic resonance to cause explosion, and the overall reliability and safety are not high.

The utility model adopts the following technical proposal. The utility model provides a EVT complete set looped netowrk cabinet, the body is complete set of cabinet body structure, and the cabinet body includes: the device comprises an instrument room, a mechanism room, a base, a switch air chamber, a circuit EVT air chamber, a power getting PT unit and a bus EVT air chamber; the circuit EVT air chamber and the bus EVT air chamber both comprise: the device comprises an inflatable box body, a connecting conductor, an EVT assembly and a sealing insulator; the inside of the inflation box body is inflated, and the EVT assembly is installed inside the inflation box body through a fastener and connected with the sealing insulator through a connecting conductor; the switch air chamber is positioned above the base and is integrally sealed, a switch body assembly is arranged in the switch air chamber, and the upper part of the switch air chamber is fixedly connected with an expansion bus; the circuit EVT air chamber and the power getting PT unit are both positioned below the cabinet body, and the bus EVT air chamber is positioned at the top of the switch air chamber; and the power taking PT unit is electrically connected with the corresponding insulator on the switch air chamber through a connecting cable.

Preferably, the switching gas cell includes: the circuit EVT parallel connection sleeve, the electricity getting PT parallel connection sleeve, the copper bar, the wire inlet sleeve, the switch body assembly and the bus EVT parallel connection sleeve.

Preferably, the bus EVT plenum inner conductor is electrically connected with a bus in a switch plenum; the electrical connection is carried out through a female connector or through a high-voltage cable and a sleeve.

Preferably, the bus EVT air chamber is connected with the switch air chamber through a high-voltage bushing, the lower part of the bus EVT air chamber is connected with a bus leading-out end, the lower end of the bus leading-out end is fixedly connected to a wire inlet bushing on the switch air chamber through a copper conducting rod, and a connecting conductor is led out of the wire inlet bushing and connected with the EVT parallel bushing and the power-taking PT parallel bushing.

Preferably, the bus EVT air chamber is positioned at the top of the switch air chamber, is fixed through the connecting bracket and is electrically connected with the bus EVT parallel sleeve; and the monitoring of the internal pressure of the bus EVT air chamber is realized at the air pressure monitoring port.

Preferably, the line EVT air chamber and the power taking PT unit are arranged in the switch air chamber space.

Preferably, the base comprises a middle partition plate, and an area between the middle partition plate and the rear cabinet door is a pressure relief chamber; the area between the partition board and the front cabinet door is a cable chamber; the electricity taking PT unit is arranged in the pressure relief cavity in the base or is independently arranged behind the base.

Preferably, the line EVT air chamber and the bus EVT air chamber are integrally sealed by welding.

Preferably, the EVT complete set ring main unit is in a common box layout with at least 2 intervals and integrates a plurality of functional unit cabinets.

Preferably, each interval of switch body assembly in the switch air chamber can be interconnected through an upper bus connecting conductor, or different intervals of bus connection can be realized through an air box top expansion insulator and a sleeve.

Use above-mentioned technical scheme, compared with the prior art, the utility model, beneficial technological effect includes at least:

(1) The utility model relates to an EVT complete set looped netowrk cabinet has cancelled huge PT cabinet, and the product is small and exquisite regular, and the size is compact, can effectively solve the problem that the installation place is little, space size is limited.

(2) The utility model relates to a EVT complete set looped netowrk cabinet is through rational arrangement generating line EVT and circuit EVT, can accurate collection generating line side and each line side voltage signal, satisfies different control protection and measurement demands.

(3) The utility model relates to an EVT complete set looped netowrk cabinet adopts the electronic voltage transformer who encapsulates alone in airtight gas tank, and is insulating reliable, has avoided electromagnetic type mutual-inductor easily to receive the interference, the problem of easy explosion, has greatly guaranteed the reliability requirement.

Drawings

Fig. 1 is a perspective view of an EVT ring main unit according to the present invention;

fig. 2 is a schematic diagram of the internal structure of the EVT integral ring main unit according to the present invention;

fig. 3 is a schematic structural view of the EVT ring main unit set.

In the figure:

an instrument room 10; a mechanism chamber 20; an operating mechanism assembly 201; a base 30; a T-shaped cable head 301; a front cabinet door 302; a cable 303; a middle partition 304; a connection cable 305; a rear cabinet door 306; opening and closing the air chamber 40; line EVT shunt sleeve 401; taking a PT parallel casing 402; a copper bar 403; a wire-in sleeve 404; a switch body assembly 405; bus EVT shunt sleeve 406; line EVT plenum 50; a power taking PT unit 60; bus EVT plenum 70; a connecting bracket 701; a gas pressure monitoring port 702; and a secondary outgoing line 703.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention. The embodiments described herein are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention based on the spirit of the present invention.

Referring to fig. 1 to 3, according to the embodiment of the present invention, there is provided an EVT ring main unit set, the main body is a set of main body structure, and includes an instrument room 10, a mechanism room 20, a base 30, a switch air chamber 40, a line EVT air chamber 50, an electricity-taking PT unit 60 and a bus EVT air chamber 70.

Specifically, the top of the whole cabinet body is an instrument room 10, various control instruments and the like are installed in the instrument room, a mechanism room 20 is arranged right below the instrument room 10, and an operating mechanism assembly 201 is installed in the mechanism room. Behind mechanism room 20 is switch air chamber 40, and inside includes circuit EVT parallel sleeve 401, gets electric PT parallel sleeve 402, copper bar 403, inlet wire sleeve 404, switch body subassembly 405 and generating line EVT parallel sleeve 406.

The conductor part of the switch body assembly 405 and the copper bar 403 are connected in parallel at the end of the wire inlet sleeve 404, and the lower part of the copper bar 403 is connected with the circuit EVT parallel sleeve 401 and the power taking PT parallel sleeve 402 to realize the electrical conduction in the cabinet. Bus EVT shunt sleeve 406 is positioned above switch plenum 40 for electrically shunting top bus EVT plenum 70 to the switch body.

A base 30 is arranged right below the switch air chamber 40, wherein the area between the partition plate 304 and the front cabinet door 302 is a cable chamber, and a T-shaped cable head 301 and a cable 303 are arranged inside the cable chamber; the area between the intermediate bulkhead 304 and the rear cabinet door 306 is a relief chamber to which the line EVT plenum 50 is mounted.

The electricity taking PT unit 60 is located at the lower part of the cabinet body and is electrically connected with the corresponding insulator on the switch air chamber 40 through a connecting cable. The power taking PT unit 60 can be placed in the pressure relief cavity in the base 30, or can be separately arranged behind the base 30. For example, but not limited to, the power-taking PT unit 60 is installed at the rear of the base 30, and is electrically connected to the power-taking PT parallel sleeve 402 in the switch air chamber 40 through the connecting cable 305.

Bus EVT air chamber 70 is located at the top of switch air chamber 40, is fixed through connecting support 701, and is electrically connected with bus EVT shunt tubes 406, and the inside of the box body is inflated, such as but not limited to SF6, various insulating gases, conventional air and the like, and can realize the monitoring of the internal pressure at air pressure monitoring port 702. After the bus EVT air chamber 70 finishes voltage measurement on the bus of the ring main unit set, a voltage signal is sent to the instrument room 10 through the secondary outgoing line 703.

It can be understood that the line EVT air chamber 50 and the power getting PT unit 60 are both positioned in the space of the base 30 below the cabinet body, the bus EVT air chamber 70 is positioned at the top of the switch air chamber 40, and the whole cabinet body is regular in appearance and compact in size.

The line EVT plenum 50 and the bus EVT plenum 70 each include: the EVT comprises an inflation box body, a connecting conductor, an EVT assembly and a sealing insulator. The inside of the gas-filled box is filled with gas, such as but not limited to SF6, various insulating gases, conventional air, etc., and the EVT assembly is mounted inside the gas-filled box through fasteners and connected with the hermetic insulator through a connecting conductor. The line EVT collects voltage signals of all line sides of the complete set of cabinet, the bus EVT collects voltage signals of the bus sides of the complete set of cabinet, and the power taking PT meets the power supply requirement of the complete set of cabinet.

In the preferred but non-limiting embodiment of the present invention, when the EVT ring main unit is implemented, the EVT gas chamber 50 is disposed on each line side, and the power-taking PT unit 60 is disposed only at the bottom of the incoming line compartment. A set of devices is provided with a bus EVT plenum 70 on top.

In the scheme, a bus EVT air chamber 70, a circuit EVT and a power-taking PT comprehensive configuration scheme is adopted, the EVT is arranged in an air inflation box body, and the whole body is arranged at the bottom or the top of a ring main unit switch air chamber through screws, so that the voltage measurement of each circuit side and the bus side of the whole set of cabinet is realized, and the detachable maintenance requirement is met. On the premise of compact layout and regular appearance, the voltage precision measurement is realized, the ferromagnetic resonance risk is eliminated from the measurement principle, the problem that the electromagnetic type mutual inductor is easy to explode is avoided, and the reliability and the requirements of maintenance and overhaul are greatly ensured. The circuit EVT air chamber 50, the bus EVT air chamber 70 and the power taking PT unit 60 are arranged in the cabinet body, so that the size of the whole cabinet is greatly reduced, the compact design is realized, and the purpose of canceling the PT cabinet is achieved by the complete looped network cabinet.

In a further preferred embodiment, as shown in fig. 1, the complete cabinet is a co-box layout with at least 2 intervals, and includes a plurality of functional unit cabinets, such as an incoming line cabinet and an outgoing line cabinet, for integration.

In a further preferred embodiment, as shown in FIG. 2, the line EVT plenum 50 and bus EVT plenum 70 are integrally sealed by welding, ensuring reliability of the overall seal over long term use in different application scenarios and in the field.

In a further preferred embodiment, as shown in fig. 2, the switch body assemblies 405 of each compartment in the switch air chamber 40 can be interconnected by an upper bus bar connecting conductor, or can be interconnected by a top expansion insulator and a bushing on the top of the air chamber.

In a further preferred embodiment, as shown in FIG. 2, the conductors within bus EVT plenum 70 are electrically connected to the buses within switch plenum 40, either through bus EVT shunt bushings 406 or through high voltage cables and bushings.

In a further preferred embodiment, as shown in fig. 3, bus EVT plenum 70 is configured with an air pressure monitoring port 702 for dynamic monitoring of internal air pressure and air supply requirements.

In a further preferred embodiment, EVT plenum 50 or power take PT unit 60 may also be disposed in the space behind switch plenum 40.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

(1) The utility model discloses well complete set looped netowrk cabinet has configured generating line EVT air chamber, circuit EVT air chamber and has got the electric PT unit, gathers busbar voltage, business turn over line voltage signal respectively to satisfy the function demand. When having saved traditional PT cabinet, realized the accurate measurement of multichannel voltage, realized the miniaturized design target of complete set looped netowrk cabinet and looped netowrk case. The design of a highly integrated voltage sampling scheme solves the problem that the traditional ring main unit cannot simultaneously acquire the voltages of a bus and each line, and realizes the cancellation of a PT (potential transformer) cabinet, the reduction of the size of a complete ring main unit and the improvement of the sampling capability of equipment on the premise of not increasing the complexity of the main unit, thereby improving the overall performance of a product;

(2) The utility model discloses in use detachable generating line EVT air chamber and circuit EVT air chamber scheme, the EVT safe and reliable, the size is small and exquisite, the dismantlement maintenance of being convenient for, has evaded the explosion risk that ferromagnetic resonance caused simultaneously in principle, can realize generating line and each circuit voltage signal acquisition demand, more accord with on-the-spot safe operation and control protection requirement to realize the purpose to the accurate measurement of voltage;

(3) The utility model discloses well EVT complete set looped netowrk cabinet has disposed each interval circuit EVT and inlet wire cabinet in the base and has got the PT unit, has disposed generating line EVT air chamber at switch air chamber top, realizes through sealed insulator that electric switches on and sealed requirement, and the small and exquisite compactness of each unit, whole cabinet area is little, can satisfy on-the-spot all kinds of installation environment requirements, accords with the design trend of miniaturized, the compactification of power equipment down.

The applicant of the present invention has made detailed description and description of the embodiments of the present invention with reference to the drawings, but those skilled in the art should understand that the above embodiments are only the preferred embodiments of the present invention, and the detailed description is only for helping the reader to better understand the spirit of the present invention, and not for the limitation of the protection scope of the present invention, on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a EVT complete set looped netowrk cabinet, the body is complete set of cabinet body structure, and the cabinet body includes: the electric power transmission system comprises an instrument room (10), a mechanism room (20), a base (30), a switch air chamber (40), a line EVT air chamber (50), an electric power taking PT unit (60) and a bus EVT air chamber (70); the method is characterized in that:

the line EVT plenum (50) and the bus EVT plenum (70) each include: the device comprises an inflatable box body, a connecting conductor, an EVT assembly and a sealing insulator; the inside of the inflation box body is inflated, and the EVT assembly is installed inside the inflation box body through a fastener and connected with the sealing insulator through a connecting conductor;

the switch air chamber (40) is positioned above the base (30) and is integrally sealed, a switch body assembly is arranged in the switch air chamber (40), and the upper part of the switch air chamber is fixedly connected with an expansion bus; the circuit EVT air chamber (50) and the power taking PT unit (60) are both positioned below the cabinet body, and the bus EVT air chamber (70) is positioned at the top of the switch air chamber (40); and the electricity taking PT unit (60) is electrically connected with a corresponding insulator on the switch air chamber (40) through a connecting cable.

2. The EVT unit ring main unit according to claim 1, wherein:

the switching gas chamber (40) includes: the circuit EVT is parallelly connected sleeve pipe (401), gets electric PT and parallelly connected sleeve pipe (402), copper bar (403), inlet wire sleeve pipe (404), switch body subassembly (405) and generating line EVT parallel bushing (406).

3. The EVT unit ring main unit according to claim 2, wherein:

the inner conductor of the bus EVT air chamber (70) is electrically connected with the bus in the switch air chamber (40); the electrical connection is carried out through a female connector or through a high-voltage cable and a sleeve.

4. The EVT unit ring main unit according to claim 3, wherein:

the bus EVT air chamber (70) is connected with the switch air chamber (40) through a high-voltage bushing, the lower part of the bus EVT air chamber (70) is connected with a bus leading-out end, the lower end of the bus leading-out end is fixedly connected to an incoming line bushing (404) on the switch air chamber (40) through a copper conducting rod, and a connecting conductor is led out of the incoming line bushing (404) and is connected with an EVT parallel bushing (406) and an incoming PT parallel bushing (402).

5. The EVT unit ring main unit according to claim 1, wherein:

the bus EVT air chamber (70) is positioned at the top of the switch air chamber (40), is fixed through a connecting bracket (701), and is electrically connected with a bus EVT parallel sleeve (406); monitoring of the pressure inside the bus EVT air chamber (70) is achieved at the air pressure monitoring port (702).

6. The EVT unit ring main unit according to claim 1, wherein:

the circuit EVT air chamber (50) and the power taking PT unit (60) are arranged in the space of the switch air chamber (40).

7. The EVT unit ring main unit according to claim 5, wherein:

the base (30) comprises a middle partition plate (304), and an area between the middle partition plate (304) and the rear cabinet door (306) is a pressure relief chamber; the area between the partition plate (304) and the front cabinet door (302) is a cable chamber;

the electricity taking PT unit (60) is arranged in the pressure relief cavity in the base or is independently arranged behind the base (30).

8. The EVT unit ring main unit according to claim 1, wherein:

the circuit EVT air chamber (50) and the bus EVT air chamber (70) are sealed integrally by welding.

9. The EVT unit ring main unit according to claim 1, wherein:

the EVT complete looped network cabinet is in a common-box layout with at least 2 intervals and integrates a plurality of functional unit cabinets.

10. The EVT unit ring main unit according to claim 8, wherein:

switch body subassembly (405) of each interval in switch air chamber (40), each interval interconnection is realized to accessible top generating line connecting conductor, or realizes different interval female unions through gas tank top expansion insulator and sleeve pipe.

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