CN107196205A - Novel voltage switching screen in a kind of transformer station - Google Patents

Abstract

The invention discloses a new type of voltage transfer screen in a substation, which comprises a cabinet body. The front end of the cabinet body is provided with a front door, the rear end of the cabinet body is provided with a rear door, and the inner wall of the left side plate in the cabinet body is provided with several left supports. There are several right support plates on the inner wall of the right side plate, the left support plate corresponds to the right support plate and is connected by the front transverse plate and the rear transverse plate, and the front transverse plate and the rear transverse plate are arranged in parallel. The high-voltage side voltage connection assembly is installed on the horizontal plate, and the high-voltage side voltage connection assembly includes the high-voltage bus I connection unit and the high-voltage bus II connection unit arranged side by side; the medium-voltage side voltage connection unit is installed on the rear horizontal plate. In terms of cost, the medium-voltage side voltage access component includes a medium-voltage bus I access unit and a medium-voltage bus II access unit arranged side by side. The layout of the present invention is clear at a glance without confusion. Simple structure, convenient wiring, safer and more reliable during operation; easier work during transformation, high safety performance.

Description

A new type of voltage transfer panel in substation

technical field

The invention belongs to the technical field of substations, and in particular relates to a novel voltage transfer panel in a substation.

Background technique

In the design of substations, the common design is that the current loop is directly led from the secondary winding of the CT to the protection device, and the secondary voltage loop is directly led to the control room by the secondary winding of the PT, and is led to the top of the screen through the voltage switching screen in the control room. Connect it to the small busbar on the top of the screen, and at this time, each protection device is introduced to the secondary voltage by the small busbar on the top of the screen. As far as the design is concerned, the small busbar on the top of the screen is very important to the reliability and safety of the secondary voltage operation. If it fails, the protection operation in the entire substation will be affected. In addition, during the process of technical transformation of relay protection, it was found that the current voltage circuit is charged and bridged to temporary voltage during construction, which may easily lead to abnormal secondary voltage, posing safety hazards, and voltage bridges also occupy the construction period. Moreover, most of the small busbars on the top of the screen, especially the jumpers between the screens, use wiring lugs, and the construction is more troublesome. The other small busbars are all single busbars. All will cause a loss of pressure accident to the screen cabinet behind.

Contents of the invention

The invention aims to solve technical problems such as high failure rate and poor stability of the existing substation when the protection device is introduced into the secondary voltage through the screen-top small busbar, thereby providing a substation with simple layout, low failure rate and strong independence New voltage transfer screen.

In order to solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A new type of voltage transfer screen in a substation, including a cabinet body. The front end of the cabinet body is provided with a front opening door, the rear end of the cabinet body is provided with a rear opening door, and a number of left support plates are provided on the inner wall of the left side plate in the cabinet body. There are several right support plates on the inner wall of the side plate. The left support plate corresponds to the right support plate and is connected by the front transverse plate and the rear transverse plate. The front transverse plate and the rear transverse plate are arranged in parallel and installed on the front transverse plate. There is a high-voltage side voltage access component, which includes a high-voltage bus I access unit and a high-voltage bus II access unit arranged in parallel; a medium-voltage side voltage access unit is installed on the rear horizontal plate, The medium-voltage side voltage access component includes a medium-voltage bus I access unit and a medium-voltage bus II access unit arranged side by side.

The high-voltage bus I access unit includes a front vertical plate I, which is vertically installed on the front horizontal plate, and several parallel connection terminal groups are installed on the front vertical plate I, and each connection terminal group includes several two connecting terminals arranged in parallel; the high-voltage busbar II access unit includes a front vertical plate II, and the front vertical plate II is vertically installed on the front horizontal plate and parallel to the front vertical plate I; installed on the front vertical plate II Several connecting terminal groups arranged in parallel, each connecting terminal group includes several connecting terminals arranged in parallel.

The rear end surface of the front vertical plate I is provided with a card block I, and the card block I is provided with a card slot I, and the card slot I is set on the front horizontal plate and slides on the front horizontal plate; the front vertical plate II The rear end face is provided with a card block II, and the card block II is provided with a card slot II, and the card slot II is set on the front horizontal plate and slides on the front horizontal plate. The sliding arrangement of the front vertical plate I and the front vertical plate II makes the distance between the two adjustable, and the distance between the two can be changed according to actual needs, thereby improving the applicability of the present invention.

The medium-voltage busbar I access unit includes a rear vertical plate I, which is vertically installed on the rear horizontal plate, and several parallel connection terminal groups are installed on the rear vertical plate I, and each terminal group includes Several connecting terminals arranged in parallel; the medium-voltage busbar II access unit includes a rear vertical plate II, which is vertically installed on the rear horizontal plate and parallel to the rear vertical plate I; on the rear vertical plate II A plurality of parallel connection terminal groups are installed, and each connection terminal group includes several parallel connection terminal groups.

The rear end surface of the rear vertical plate I is provided with a clamping block III, and the clamping block III is provided with a clamping groove III, and the clamping groove III is clamped on the rear horizontal plate and slides on the rear horizontal plate; the rear vertical plate II The rear end surface is provided with a clamping block IV, and the clamping block IV is provided with a clamping slot IV, and the clamping slot IV is clamped on the rear horizontal plate and slides on the rear horizontal plate. The sliding arrangement of the rear vertical plate I and the rear vertical plate II makes the distance between the two adjustable, and the distance between the two can be changed according to actual needs, thereby improving the applicability of the present invention.

The front transverse plate and the rear transverse plate are respectively detachably installed between the left support plate and the right support plate, and several installation positioning holes are respectively arranged on the left support plate and the right support plate, and the front transverse plate and the rear transverse plate The ends are respectively installed in corresponding installation positioning holes. The front transverse plate and the rear transverse plate are detachably installed between the left support plate and the right support plate, and the distance between them can be changed according to actual needs, so as to isolate the high pressure side and the medium pressure side.

The left support plate and the right support plate of the present invention can also be installed on the left side plate and the right side plate in a sliding manner, which is convenient for moving distance, changes the position of the front and rear vertical plates from the operator, and is convenient for installation and maintenance.

The present invention divides the high-voltage side and the medium-voltage side through the front horizontal plate and the rear horizontal plate, and each corresponds to a door, and the wiring can be performed by opening the corresponding door. Moreover, the high-voltage side voltage access components are divided into two parallel high-voltage bus bar I access units and high-voltage bus bar II access units by the front vertical plate I and front vertical plate II, and the medium-voltage side voltage access components are also divided in the same way . When wiring, which voltage type is required and which side the voltage is taken from, open the corresponding door and select the terminal on the corresponding side to access, avoiding wiring errors, improving the reliability of voltage operation, and speeding up the efficiency of voltage transfer. It plays an important role in the safe operation of protection equipment and substations. Moreover, the layout is clear at a glance without confusion. The invention has the advantages of simple structure, convenient wiring, safer and more reliable operation, easier work during transformation, high work safety performance and good effect.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the front riser I of the present invention.

Fig. 3 is a schematic structural view of the front riser II of the present invention.

Fig. 4 is a schematic structural view of the rear riser I of the present invention.

Fig. 5 is a schematic diagram of the structure of the rear riser II of the present invention.

detailed description

As shown in Figure 1-5, a new type of voltage transfer screen in a substation includes a cabinet body 1, the front end of the cabinet body 1 is provided with a front opening door 2, and the rear end of the cabinet body 1 is provided with a rear opening door 3. The inner left side plate 4 inner wall is provided with some left support plates 6, is provided with some right support plates 7 on the right side plate 5 inner wall, left support plate 6 and right support plate 7 one-to-one correspondence and is formed by front cross plate 8 and rear The horizontal plate 9 is connected, the front horizontal plate 8 and the rear horizontal plate 9 are arranged in parallel, and the high-voltage side voltage access assembly is installed on the front horizontal plate 8, and the high-voltage side voltage access assembly includes high-voltage busbars I connected Access unit and high-voltage bus II access unit.

The high-voltage bus I access unit includes a front vertical plate I12, which is vertically installed on the front horizontal plate 8, and several parallel connection terminal groups 10 are installed on the front vertical plate I, each terminal group 10 includes several connecting terminals arranged in parallel.

The high-voltage bus II access unit includes a front vertical plate II13, which is vertically installed on the front horizontal plate 8 and parallel to the front vertical plate I12; on the front vertical plate II13, a number of parallel connection terminals are installed Groups 10, each connecting terminal group 10 includes several connecting terminals arranged in parallel.

Preferably, in order to improve the adaptability of the present invention, the rear end surface of the front vertical plate I12 is provided with a block I14, and the block I14 is provided with a card slot I15, and the card slot I15 is set on the front horizontal plate 8 and on the front Sliding on the horizontal plate 8; the rear end surface of the front vertical plate II13 is provided with a block II16, and the block II16 is provided with a card slot II17, and the card slot II17 is set on the front horizontal plate 8 and slides on the front horizontal plate 8 . The sliding arrangement of the front vertical plate I12 and the front vertical plate II13 makes the distance between the two adjustable, and the distance between the two can be changed according to actual needs, thereby improving the applicability of the present invention.

A medium-voltage side voltage access assembly is installed on the rear transverse plate 9, and the medium-voltage side voltage access assembly includes a medium-voltage bus I access unit and a medium-voltage bus II access unit arranged side by side.

The medium-voltage bus I access unit includes a rear vertical plate I18, which is vertically installed on the rear horizontal plate 9, and several parallel connection terminal groups 10 are installed on the rear vertical plate I18, each terminal Group 10 includes several terminals arranged in parallel.

The medium-voltage busbar II access unit includes a rear vertical plate II19, which is vertically installed on the rear horizontal plate 9 and parallel to the rear vertical plate I18; on the rear vertical plate II19, several wiring connections arranged in parallel Terminal groups 10, each connecting terminal group 10 includes several connecting terminals arranged in parallel.

Further preferably, the rear end surface of the rear vertical plate I18 is provided with a locking block III20, and the locking block III20 is provided with a locking groove III21, and the locking groove III21 is fixed on the rear horizontal plate 9 and slides on the rear horizontal plate 9.

The rear end surface of the rear vertical plate II19 is provided with a clamping block IV22, and the clamping block IV22 is provided with a clamping groove IV23, and the clamping groove IV23 is clamped on the rear horizontal plate 9 and slides on the rear horizontal plate 9. The sliding arrangement of the rear vertical plate I18 and the rear vertical plate II19 makes the distance between the two adjustable, and the distance between the two can be changed according to actual needs, thereby improving the applicability of the present invention.

Further preferably, the front cross plate 8 and the rear cross plate 9 are respectively detachably installed between the left support plate 6 and the right support plate 7, and several installation positioning plates are respectively arranged on the left support plate 6 and the right support plate 7 Holes, the ends of the front cross plate 8 and the rear cross plate 9 are respectively installed in the corresponding installation positioning holes. The front cross plate and the rear cross plate are detachably installed between the left support plate 6 and the right support plate 7, and the distance between the two can be changed according to actual needs, so that the high pressure side and the medium pressure side are isolated.

The left support plate 6 and the right support plate 7 of the present invention can also be slidably installed on the left side plate 4 and the right side plate 5, which is convenient for moving distance, changes the position of the front and rear vertical plates from the operator, and is convenient for installation and maintenance.

The present invention has the following advantages:

1. The circuit is simple and clear, which is convenient for maintenance and fault finding, and maintenance personnel no longer need to climb high in the relay room.

2. Reduce the amount of work and maintenance, omit the original small bus bar on the top of the screen, and the AC voltage of each protection device is in a state independent of each other. When a voltage failure occurs in one of the protection devices, other protection devices can still operate normally. suffer any impact, reduce the failure rate.

3. The design is reasonable, which can effectively prevent the wrong connection of busbar I and busbar II and the wrong connection of high and medium voltage sides.

4. It can reflect the faulty branch in time, which is convenient for maintenance.

5. Provide the necessary guarantee for the condition-based maintenance of secondary equipment in the future.

Claims (6)

1. A new type of voltage transfer screen in a substation, characterized in that it includes a cabinet (1), the front end of the cabinet (1) is provided with a front door (2), and the rear end of the cabinet (1) is provided with a rear door (3), a number of left support plates (6) are arranged on the inner wall of the left side plate (4) in the cabinet body (1), and a number of right support plates (7) are arranged on the inner wall of the right side plate (5). The plate (6) is in one-to-one correspondence with the right support plate (7) and is connected by the front transverse plate (8) and the rear transverse plate (9). The front transverse plate (8) and the rear transverse plate (9) are arranged in parallel. The high-voltage side voltage access component is installed on the front transverse plate (8), and the high-voltage side voltage access component includes the high-voltage bus I access unit and the high-voltage bus II access unit arranged side by side; on the rear transverse plate (9) A medium-voltage side voltage access component is installed, and the medium-voltage side voltage access component includes a medium-voltage bus I access unit and a medium-voltage bus II access unit arranged side by side. 2. The new type voltage transfer panel in the substation according to claim 1, characterized in that: the high-voltage bus I access unit includes a front vertical plate I (12), and the front vertical plate I (12) is vertically installed in the front On the horizontal plate (8), several parallel connection terminal groups (10) are installed on the front vertical plate I, and each connection terminal group (10) includes several parallel connection terminals; the high-voltage bus II is connected to The unit includes the front vertical plate II (13), the front vertical plate II (13) is vertically installed on the front horizontal plate (8) and parallel to the front vertical plate I (12); the front vertical plate II (13) is installed There are several connecting terminal groups (10) arranged in parallel, and each connecting terminal group (10) includes several connecting terminals arranged in parallel. 3. The new type voltage transfer screen in the substation according to claim 2, characterized in that: the rear end surface of the front vertical plate I (12) is provided with a block I (14), and the block I (14) is set There is a card slot I (15), which is set on the front horizontal plate (8) and slides on the front horizontal plate (8); the rear end surface of the front vertical plate II (13) is provided with a card Block II (16), the block II (16) is provided with a card slot II (17), and the card slot II (17) is set on the front cross plate (8) and slides on the front cross plate (8). 4. The new type voltage transfer panel in a substation according to claim 1, characterized in that: said medium-voltage busbar I access unit includes a rear riser I (18), and the rear riser I (18) is vertically installed on On the rear horizontal plate (9), several parallel connection terminal groups (10) are installed on the rear vertical plate I (18), and each connection terminal group (10) includes several parallel connection terminals; The access unit for the busbar II includes the rear vertical plate II (19), which is vertically installed on the rear horizontal plate (9) and parallel to the rear vertical plate I (18); (19) is installed with several parallel connection terminal groups (10), and each connection terminal group (10) includes several parallel connection terminal groups. 5. The new type voltage transfer screen in the substation according to claim 4, characterized in that: the rear end surface of the rear vertical plate I (18) is provided with a block III (20), and the block III (20) is set There is card slot III (21), and card slot III (21) is set on the rear horizontal plate (9) and slides on the rear horizontal plate (9); the rear end surface of the rear vertical plate II (19) is provided with a card Block IV (22), the block IV (22) is provided with a card slot IV (23), and the card slot IV (23) is set on the rear horizontal plate (9) and slides on the rear horizontal plate (9). 6. The novel voltage transfer screen in a substation according to any one of claims 1-5, characterized in that: the front horizontal plate (8) and the rear horizontal plate (9) are detachably installed on the left support plate ( 6) Between the right support plate (7), there are several installation positioning holes on the left support plate (6) and the right support plate (7), and the ends of the front transverse plate (8) and the rear transverse plate (9) The parts are respectively installed in the corresponding installation positioning holes.