CN104917499A - 110kV-level thyristor valve body - Google Patents

Abstract

The invention relates to a 110kV-level thyristor valve body. Each thyristor is a switching device provided with a semiconductor element. The valve body is a rectangular frame in which thyristor valve body modules and a heat dissipation device are arranged. Each thyristor valve body module comprises an absorption capacitor, a water-cooling resistor, the thyristor and a trigger plate, wherein the absorption capacitors and the water cooling resistors are arranged along the transverse direction of the frame, and the thyristors and the trigger plates are connected with the heat dissipation device; and the thyristor valve body modules are parallelly arranged along the longitudinal direction of the frame. The 110kV-level thyristor valve body provided by the invention not only can meet requirements of ultrahigh voltage static reactive power compensation equipment for voltage and current capacity, but also has the advantages of good insulation performance, simple structure, reasonable layout and good heat dissipation effect.

Description

A 110kV grade thyristor valve body

technical field

The invention relates to an electronic switch device, in particular to a thyristor valve body used for controlling UHV static var compensation equipment.

Background technique

In order to reduce the amount of shutdown under the condition of UHV DC bipolar blocking, it is necessary to properly configure UHV static var compensation equipment with a certain capacity in some UHV substations of AC transmission channels. UHV static var compensation equipment needs a high-power power electronic switching device to control. Therefore, there is a need for a direct-mounted thyristor valve that can control UHV static var compensation equipment.

Most of the existing 110kV direct-mounted thyristor valves use TCR-type SVC devices as thyristors. The highest voltage level is 66kV and the capacity is 360MVar, which cannot meet the voltage and current capacity requirements of UHV static var compensation equipment. Moreover, due to the unreasonable structural layout and the poor heat dissipation effect of the heat dissipation device, the direct-mounted thyristor valve is often operated at a high temperature and is prone to failure and even damage, resulting in power system failure. Moreover, the existing thyristor valve has poor insulation performance due to lack of insulation measures, and often breaks down.

Therefore, it is necessary to provide a 110kV grade thyristor valve body, which can meet the voltage and current capacity requirements of UHV static var compensation equipment, and has the advantages of good insulation performance, simple structure, reasonable layout and good heat dissipation effect.

Contents of the invention

To solve the deficiencies of the prior art, the present invention provides the following technical solutions: provide a 110kV grade thyristor valve body, the thyristor is a switching device with a semiconductor element; the valve body is equipped with Rectangular frame of thyristor valve body module and heat sink;

The thyristor valve body module includes absorbing capacitors, water cooling resistors, thyristors and trigger boards connected to the cooling device along the lateral direction of the frame;

The thyristor valve body modules are arranged in parallel along the longitudinal direction of the frame.

The frame is a sun-shaped frame composed of beams and vertical beams;

A connector for fixing the thyristor valve body module arranged in parallel along the longitudinal direction is provided in the zigzag frame;

A disk-shaped fixing piece (19) parallel to the axial direction of the cross beam is provided at the junction of the cross beam and the vertical beam.

The heat dissipation device includes a heat dissipation assembly connected with the thyristor and a water delivery pipe assembly arranged in the vertical direction of the valve body.

The water delivery pipe assembly is a mesh-shaped water delivery pipeline composed of successively connected water inlet branch pipes, water inlet pipes, water distribution pipes connected with heat dissipation components and water cooling resistors, return water pipes and return water branch pipes;

The water inlet branch pipe and the water return branch pipe are S-shaped water delivery pipes bent in sections along the vertical direction.

A water inlet branch connected to the water inlet pipe, a water distribution pipe provided with a cooling assembly, and a return water branch connected to the return water pipe are sequentially provided between the water inlet pipe and the return water pipe;

Two sides of the heat dissipation component are connected with the thyristor.

The axial direction of the water inlet pipe and the water return pipe are provided with joints connected to the water distribution pipe; both ends of the axial direction are provided with equipotential connectors arranged perpendicular to the axial direction;

The equipotential connection piece is a stainless steel cylinder flexibly connected with the water inlet pipe and the water return pipe.

The heat dissipation assembly includes a heat dissipation plate and cover plates arranged on both sides of the heat dissipation plate;

The heat dissipation plate is a rectangular plate with a disc-shaped water channel in the center; the disc-shaped water channel is composed of water inlet pipes and water outlet pipes arranged in a staggered manner;

The water inlet pipe and the water outlet pipe are connected to the water distribution pipe, and the other end meets the water flow in the center of the disc-shaped water channel, and the water flow intersection is provided with two cylindrical columns perpendicular to the surface of the heat dissipation plate Form the equalizer column (17).

The axial center of the water inlet pipe and the water outlet pipe is provided with a splitter plate perpendicular to the surface of the heat dissipation plate.

A wiring board arranged parallel to the heat sink is fixed on the heat sink, and a connection line connected to the trigger board is arranged on the wiring board.

The frame has two or more layers, and post insulators and aluminum alloy connecting columns are arranged between the frames of each layer.

The frame is made of conductive material, and its upper and lower surfaces are respectively provided with connectors connected to both ends of the aluminum alloy connecting column. Two adjacent frames and the aluminum alloy connecting column form a Z-shaped conductor.

Both ends of the post insulator are respectively connected to the disc-shaped fixing parts arranged on the upper and lower surfaces of the frame;

A voltage equalizing capacitor is also provided between the voltage equalizing plates on the outside of the frame and parallel to its side;

The two ends of the two post insulators arranged at the lower end of the valve body are provided with cross-set insulating posts; the axial direction of the insulating posts is provided with umbrella-shaped insulators.

Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

1. All devices in the thyristor valve provided by this application are in the same plane, which has the advantages of reducing the height of the valve body and facilitating the vertical stacking of multi-layer thyristor valves;

2. The frame for installing the thyristor valve provided by this application has the advantages of high frame structure strength, flexible and simple operation, and easy splicing and fixing;

3. The frame for installing the thyristor valve provided by this application is fixed by a disc structure, which has the advantages of reducing corona discharge and ozone generation;

4. The frames provided by this application are fixed by aluminum alloy connecting columns, so that the voltage in each frame is equal, and the electric field inside the entire valve body is uniform;

5. In the water cooling system provided by this application, the water inlet and outlet are located in the middle of the valve body, and the water supply method is adopted layer by layer from the bottom to the top and the water is returned from the top to the bottom. It has the characteristics of uniform water supply and improves the heat dissipation capacity and service life of the device. .

6. The pressure equalizing plate provided by this application can reduce the discharge of the thyristor valve to the surrounding air, reduce the generation of ozone, and protect the atmospheric environment.

7. Each layer of valve body modules provided by this application adopts parallel voltage equalizing capacitors, so that each layer of valve body modules bears the same voltage, and the electric field inside the entire valve body is uniform.

8. The bottom layer of the thyristor valve provided by this application is supported by post insulators and is provided with cross cable-stayed insulators, which can play the role of insulation and increase the stability of the structure.

9. The water delivery pipe assembly provided by this application is provided with equipotential connectors, which can play the role of equipotential and drainage.

Description of drawings

Fig. 1 is the top view of the thyristor valve body provided by the present invention;

Fig. 2 is the left side view of the thyristor valve body module provided by the present invention;

Fig. 3 is a frame top view provided by the present invention;

Fig. 4 is the front view of the thyristor valve body provided by the present invention;

Fig. 5 is the front view of the water pipe assembly provided by the present invention;

Fig. 6 is a schematic diagram of the connection of the heat dissipation assembly provided by the present invention;

Fig. 7 is a sectional view of the heat dissipation assembly provided by the present invention;

Fig. 8 is a left view of the heat dissipation assembly provided by the present invention;

Fig. 9 is a schematic diagram of the connection of the water delivery pipe assembly provided by the present invention;

Among them, 1—frame, 2—thyristor, 3—absorbing capacitor, 4—water cooling resistor, 5—trigger board, 6—heat dissipation component, 7—water pipe assembly, 8—water inlet branch pipe, 9—water inlet pipe, 10—distribution Water pipe, 11—return pipe, 12—return branch pipe, 13—radiating plate, 14—cover plate, 15—water inlet pipe, 16—water outlet pipe, 17—flow equalizing column, 18—distributor plate, 19—disc shape Fixing parts, 20—voltage equalizing plate, 21—insulating column, 22—pillar insulator, 23—aluminum alloy connecting column, 24—voltage equalizing capacitor

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1:

As shown in Figure 1, a 110kV grade thyristor valve body, the thyristor 2 is a switching device provided with a semiconductor element; the valve body is a rectangular frame 1 with a thyristor valve body module and a cooling device inside; its characteristics is that

As shown in FIG. 2, the thyristor valve body module includes a absorption capacitor 3 arranged along the lateral direction of the frame 1, a water cooling resistor 4, a thyristor 2 and a trigger plate 5 connected to the heat sink;

The thyristor valve body modules are arranged in parallel along the longitudinal direction of the frame 1 .

As shown in Figure 3, the frame 1 is a sun-shaped frame composed of beams and vertical beams;

A connector for fixing the thyristor valve body module arranged in parallel along the longitudinal direction is provided in the zigzag frame;

A disc-shaped fixing member 19 parallel to the axial direction of the beam is provided at the joint between the beam and the vertical beam.

As shown in FIG. 4 and FIG. 5 , the heat dissipation device includes a heat dissipation assembly 6 connected to the thyristor 2 and a water delivery pipe assembly 7 arranged in the vertical direction of the valve body.

The water delivery pipe assembly 7 is a mesh-shaped water delivery pipeline composed of successively connected water inlet branch pipes 8, water inlet pipes 9, water distribution pipes 10 connected with heat dissipation components 6 and water cooling resistors 4, return water pipes 11 and return water branch pipes 12;

The water inlet branch pipe 8 and the water return branch pipe 12 are water delivery pipes bent in S-shaped sections along the vertical direction.

As shown in Figure 6, between the water inlet pipe 5 and the water return pipe 9, the water inlet branch pipe 6 connected to the water inlet pipe 5, the water distribution pipe 7 provided with the heat dissipation assembly 2, and the water return pipe 9 are sequentially provided. The backwater branch pipe 8;

Two sides of the heat dissipation component 2 are connected with the thyristor 4 .

The axial direction of the water inlet pipe 9 and the return pipe 11 is provided with joints connecting the water distribution pipe 10; both ends of the axial direction are provided with equipotential connectors arranged perpendicular to the axial direction;

The equipotential connection piece is a stainless steel cylinder flexibly connected to the water inlet pipe 9 and the water return pipe 11 .

As shown in FIG. 8, the heat dissipation assembly 6 includes a heat dissipation plate 13 and cover plates 14 arranged on both sides of the heat dissipation plate 13;

As shown in Figure 7, the heat dissipation plate 13 is a rectangular plate with a disc-shaped water channel in the center; the disc-shaped water channel is composed of water inlet pipes 15 and water outlet pipes 16 arranged in a staggered manner;

As shown in Figure 9, the water inlet pipe 15 and the water outlet pipe 16 are connected to the water distribution pipe 10, and the other end meets the water flow in the center of the disc-shaped water channel, and the water flow intersection is provided by two The cylindrical columns vertically arranged on the surface of the cooling plate 13 form the flow equalizing column 17 .

The axial center of the water inlet pipe 15 and the water outlet pipe 16 is provided with a splitter plate 18 perpendicular to the surface of the heat dissipation plate 13 .

A wiring board parallel to the cooling plate 13 is fixed on it, and a connection line connected to the triggering board 5 is arranged on the wiring board.

The frame 1 has two or more layers, and post insulators 22 and aluminum alloy connecting columns 23 are arranged between the frames 1 of each layer.

The frame 1 is made of conductive material, and its upper and lower surfaces are respectively provided with connectors connected to both ends of the aluminum alloy connecting column 23 , and two adjacent frames 1 and aluminum alloy connecting columns 23 form a zigzag conductor.

Both ends of the post insulator 22 are respectively connected to the disc-shaped fixing parts 19 arranged on the upper and lower surfaces of the frame 1;

A voltage equalizing capacitor 24 is also provided between the voltage equalizing plates 20 on the outside of the frame 1 and parallel to its side;

The two ends of the two pillar insulators 22 arranged at the lower end of the valve body are provided with insulating posts 21 arranged crosswise; the insulating posts 21 are provided with umbrella-shaped insulators in the axial direction.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify or equivalently replace the specific embodiments of the present invention. , and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the pending application of the present invention.

Claims (11)

1. a 110kV grade thyristor valve body, described thyristor (2) is for being provided with the switching device of semiconductor element; Described valve body is the rectangular frame (1) being provided with thyristor valve module and heat abstractor in it; It is characterized in that,

Described thyristor valve module comprises Absorption Capacitance (3), water-cooled resistance (4) and the thyristor (2) be connected with described heat abstractor and trigger board (5) that the horizontal direction along described framework (1) arranges;

Described thyristor valve module is arranged in parallel along described framework (1) longitudinal direction.

2. valve body as claimed in claim 1, it is characterized in that, described framework (1) is the day glyph framework be made up of crossbeam and vertical beam;

The connector of the fixing described thyristor valve module along described parallel longitudinal setting is provided with in described day glyph framework;

Described crossbeam and vertical beam junction are provided with the disc fixture (19) axially parallel with described crossbeam.

3. valve body as claimed in claim 1, it is characterized in that, described heat abstractor comprises the radiating subassembly (6) be connected with described thyristor (2) and the water-supply-pipe assembly (7) being arranged on described valve body vertical direction.

4. valve body as claimed in claim 3, it is characterized in that, described water-supply-pipe assembly (7) is the order font aqueduct be made up of the water inlet pipe be connected successively (8), water inlet pipe (9), the sparge pipe (10) being connected with radiating subassembly (6) and water-cooled resistance (4), return pipe (11) and return branch (12);

Described water inlet pipe (8) and return branch (12) are the aqueduct bending to S shape along described vertical direction segmentation;

The return branch (8) being provided with the water inlet pipe (6) be connected with described water inlet pipe (5), the sparge pipe (7) being provided with radiating subassembly (2) between described water inlet pipe (5) and return pipe (9) successively and being connected with described return pipe (9);

Described radiating subassembly (2) both sides are connected with described thyristor (4).

5. valve body as claimed in claim 4, it is characterized in that, described water inlet pipe (9) is provided with the axial direction of return pipe (11) joint being connected described sparge pipe (10); The two ends of described axial direction are provided with the vertically disposed equipotential connection fitting with described axis;

Described equipotential connection fitting is the stainless steel cylinder be flexibly connected with described water inlet pipe (9) and return pipe (11).

6. valve body as claimed in claim 4, it is characterized in that, described radiating subassembly (6) comprises heating panel (13) and is arranged on the cover plate (14) of described heating panel (13) both sides;

The rectangular slab of disc water channel is provided with centered by described heating panel (13); Described disc water channel is made up of the inlet channel be crisscross arranged (15) and outlet conduit (16);

Described inlet channel (15) is connected with described sparge pipe (10) with outlet conduit (16), the other end crosses in described disc water channel center water stream, and described current intersection is provided with and forms equal fluidization tower (17) by two with the surperficial vertically disposed cylindrical column of described heating panel (13).

7. valve body as claimed in claim 6, it is characterized in that, the axial centre of described inlet channel (15) and outlet conduit (16) is provided with the surperficial vertically disposed flow distribution plate (18) with described heating panel (13).

8. valve body as claimed in claim 6, it is characterized in that, described heating panel (13) is fixed with the terminal block of setting in parallel, described terminal block is provided with the connecting line be connected with described trigger board (5).

9. valve body as claimed in claim 2, is characterized in that, described framework (1), for more than two-layer or two-layer, is provided with post insulator (22) and aluminium alloy joint pin (23) between every layer of described framework (1).

10. valve body as claimed in claim 9, it is characterized in that, described framework (1) is conductive material, its upper and lower surface is respectively equipped with the connector be connected with described aluminium alloy joint pin (23) two ends, two adjacent described frameworks (1) and aluminium alloy joint pin (23) composition zigzag electric conductor.

11. valve bodies as claimed in claim 9, is characterized in that, described post insulator (22) two ends are connected with the described disc fixture (19) being arranged on described framework (1) upper and lower surface respectively;

Equalizing capacitor (24) is also provided with in described framework (1) outside between the equal pressing plate (20) parallel with its side;

The two ends being arranged on two described post insulators (22) of described valve body lower end are provided with insulated column (21) arranged in a crossed manner; Described insulated column (21) axial direction is provided with umbrella insulator.