CN114914752B

CN114914752B - Controller for multi-loop MMC-HVDC feed-in ultra-weak power grid

Info

Publication number: CN114914752B
Application number: CN202210354515.6A
Authority: CN
Inventors: 王楠; 潘世瑶; 李�杰
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2023-03-17
Anticipated expiration: 2042-04-06
Also published as: CN114914752A

Abstract

The invention discloses a controller of a multi-circuit MMC-HVDC feed-in extremely weak power grid, which comprises a base and a controller main body, wherein a protective shell is arranged at the upper end of the base, a bottom plate is welded at one end of the base, a triangular plate is arranged at the upper end of the bottom plate, a first guide pillar is arranged at the upper end of the triangular plate, and a second guide pillar is arranged at the upper end of the triangular plate and positioned on the right side of the first guide pillar. The connecting wire fixing device can fix the connecting wire to prevent the connecting wire from being disconnected from one end of the controller main body due to external pulling, promote the connecting wire and the controller main body to carry out pressure stabilization debugging, ensure the use safety of the controller main body, and also can install and fix the sealing seat to prevent liquid from entering the controller main body, so that the safety of the device is further improved, and secondly, the connecting wire can be further fixed, the fastening of the connecting wire on the outer sides of the first guide pillar, the second guide pillar and the third guide pillar is increased, and the connection between the connecting wire and the controller main body is improved.

Description

Controller for multi-loop MMC-HVDC feed-in ultra-weak power grid

Technical Field

The invention relates to the technical field of controllers, in particular to a controller for feeding a multi-circuit MMC-HVDC (modular multilevel converter-high voltage direct current) into an extremely weak power grid.

Background

The controller is a main command device for controlling the starting, speed regulation, braking and reversal of the motor by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit according to a preset sequence, and is composed of a program counter, a command register, a command decoder, a time sequence generator and an operation controller, and is a decision mechanism for issuing commands, namely, the decision mechanism completes the coordination and commands of the operation of the whole computer system.

Conventional controller, when using, because the outside is dragged, can make the connecting wire break from the junction of controller main part, lead to the connecting wire outside appearing, and then can cause the potential safety hazard to the people, cause harm, and because the protecting crust can have certain gap with being connected of bottom plate, can lead to also entering into the inside of controller main part from the gap, and then can cause harm to the people, secondly, can't further fix the connecting wire, probably make the device the potential safety hazard appear.

We therefore propose a multi-loop MMC-HVDC feed controller to very weak grids in order to solve the problems set out above.

Disclosure of Invention

The present invention aims to provide a controller for feeding MMC-HVDC to a very weak power grid, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a controller for feeding a multi-circuit MMC-HVDC extremely-weak power grid comprises a base and a controller main body, wherein a protective shell is arranged at the upper end of the base, a bottom plate is welded at one end of the base, a triangular disc is arranged at the upper end of the bottom plate, a first guide pillar is arranged at the upper end of the triangular disc, a second guide pillar is arranged at the upper end of the triangular disc and positioned on the right side of the first guide pillar, and a third guide pillar is arranged at the upper end of the triangular disc and positioned in front of the first guide pillar and the second guide pillar; the upper end of the bottom plate is provided with long columns, the upper ends of two groups of long columns are provided with a fixed plate, the inside of the protective shell is provided with a rotating plate, one end of the rotating plate is movably provided with a moving part, one end of the rotating plate is provided with a trapezoidal column, a connecting column is arranged in the protective shell and positioned in the middle of the two groups of trapezoidal columns, the lower end of the connecting column is provided with a fastening frame seat, one end of the trapezoidal column penetrates through one end of the protective shell to be connected with the upper end of the fixed plate, one end of the two groups of rotating plates is connected with the left side and the right side of the connecting column, by arranging the long plates, the first guide column, the second guide column and the third guide column, the lower half circle wound by the first guide column wound by taking up one side of the connecting line is reversely wound on the upper half circle of the second guide column, the upper end of the third guide column is left aside, and the outer side of the third guide column is wound for one circle, so that the connecting line can be fixed, and the connecting line is prevented from being disconnected from one end of the controller main body due to external pulling, the connecting line and the controller main body are promoted to bear voltage stabilization debugging, the use safety of the controller main body is guaranteed, secondly, by arranging the long column, the moving part, the rotating plates and the fastening frame seat, when the protective shell is arranged at the upper ends of the base and the bottom plate, two groups of trapezoidal columns and two groups of rotating plates in the protective shell can move downwards, under the matching of the long column and the fixed plate, one end of the trapezoidal column of the protective shell can push the rotating plates to move upwards, the rotating plates can rotate in the moving part, and then the other end of the rotating plates can push the connecting column to move downwards, and under the lever principle, the connecting column of the protective shell can push the fastening frame seat to move towards the upper ends of the first guide column, the second guide column and the third guide column, so that the connecting line can be further fixed, and the fastening of the connecting line at the outer sides of the first guide column, the second guide column and the third guide column is increased, the connection between the connection line and the controller main body is improved.

Preferably, the upper end of base and the left and right sides side that is located the controller main part are provided with the closing plate, the upper end of closing plate is provided with the pull rod, the right side of closing plate is provided with the seal receptacle, the spacing groove has been seted up to the lower extreme of seal receptacle, the lateral wall is provided with the arc piece about the inside of closing plate, the upper end of two sets of arc pieces is provided with the convex plate, the inside of closing plate is provided with the link post, the lower extreme of link post is fixed with the upper end of convex plate, the seal receptacle passes the inside that sets up at the link post, the upper end setting of convex plate is in the inside of spacing groove, through setting up the closing plate, the seal receptacle, the spacing groove, the arc piece, convex plate and link post, through two sets of seal receptacles that set up, can shift out the one end of convex plate from the inside of spacing groove, conveniently shift out the one end of seal receptacle from the inside of closing plate, the same reason is through pushing the pull rod downwards, and insert the inside of arc piece to the closing plate, and the one end that can move out the two sets of arc piece can be carried out the inside control that the seal receptacle can be in order to the elastic force of the one set of the convex plate, thereby it can be carried out the inside of the installation of the safety device that can be carried out to the one set of the convex plate, it can be carried out to the one step to the installation, thereby it can be carried out.

Preferably, the upper end of bottom plate is close to right side border position department and is provided with the rectangular block, the upper end one end of rectangular block is run through and has been seted up the storage tank, the inside of rectangular block is provided with the spring frame, the inside of spring frame is provided with supporting spring, supporting spring's one end is provided with the convex post, the one end of convex post is fixed mutually with the one end of holding frame, the inside of storage tank is provided with the holding frame, the one end at the rectangular block is seted up to three group's storage tanks equidistance, a plurality of group's spring frame equidistance distributes in the inside of rectangular block, through setting up the rectangular block, supporting spring, convex post and holding frame, through pressing two sets of holding frames, the one end of its holding frame extrudees supporting spring through the convex post, insert the inside of spacing groove to the connecting wire this moment, and not hard up two sets of holding frames, under two sets of supporting spring's elasticity, its supporting spring can drive the inside removal at the storage tank through the convex post, thereby can dredge the connecting wire, and prevent that the connecting wire from shaking in the inside of storage tank, prevent that the connecting wire from suffering from wearing and tearing.

Preferably, the upper end of rectangular is provided with the roof, the top of roof is provided with the limiting plate, the inside of roof is provided with the axle bed, the lower extreme of limiting plate is provided with the axostylus axostyle, the one end movable mounting of axostylus axostyle is in the inside of axle bed, through the roof, the cooperation of axle bed and axostylus axostyle, through removing the limiting plate, make it drive the inside rotation of axostylus axostyle at the axle bed, and the one end of axostylus axostyle is rotatory at the roof, the limiting plate that can be convenient for is rotatory in the top of roof, conveniently lead the connecting wire in the same direction, and simultaneously, can block the connecting wire, prevent that the connecting wire from breaking away from the inside of rectangular.

Preferentially, the front end of protecting crust runs through and has seted up the wire guide, and the upper end of protecting crust is provided with the display structure, through being provided with the protecting crust, can protect the controller main part, and the setting of three group's wire guides can conveniently dredge the connecting wire, through being provided with the display structure, can make things convenient for the staff to run through the data in the controller main part, makes things convenient for the staff to know the condition of controller main part.

Preferably, three roof equidistance of group distribute in the upper end of rectangular block, and three roof of group are located three storage tank of group directly over, through being provided with three roof of group, can be convenient for cooperate three storage tank of group, and the connecting wire of three groups of being convenient for is led out from the inside of three storage tank of group respectively to prevent that three connecting wires of group from taking place to tie a knot.

Preferably, the mounting panels are welded on the left side and the right side of the base and the protective shell, the mounting panels of the groups are distributed at the left corner and the right corner of the protective shell in an equidistant mode, the base and the protective shell can be conveniently mounted by the aid of the four groups of mounting panels, the controller main body is conveniently protected, and the base is also conveniently mounted.

Preferably, no. one guide pillar, no. two guide pillars and No. three guide pillars are three horn shapes and distribute in the upper end of triangle dish, three triangle dishes of group equidistance distribute in the upper end of bottom plate, through to a guide pillar, no. two guide pillars and No. three guide pillar's design, can conveniently fix the connecting wire, prevent the connecting wire from the disconnection of the one end of controller main part, can guarantee that this controller can normal use, and through being provided with the triangle dish, can be to a guide pillar, no. two guide pillars and No. three guide pillars are fixed, no. one guide pillar, no. two guide pillars and No. three guide pillar's stability has been guaranteed.

Preferably, the front end and the rear end of moving part are installed at the inside front and rear ends of protecting crust, and the fastening frame seat is located directly over three sets of triangular plates, through the moving part setting, can make things convenient for the rotor plate to move about in one side of moving part, can make its rotor plate rotatory in the inside of protecting crust.

Preferably, the controller main part is installed in the upper end of base, and the three group's connectors of controller main part are aligned directly over with three group's triangle dish respectively, through being provided with three group's triangle dish, under the cooperation of three group's triangle dish, can be convenient for dock with three group's connectors of controller main part one end to fix alone three group's connecting wires, prevent that three group's connecting wires from taking place the phenomenon of knoing.

Compared with the prior art, the invention has the beneficial effects that:

1. by arranging the long plate, the first guide pillar, the second guide pillar and the third guide pillar, the lower half circle wound by the first guide pillar is wound on one side of the connecting wire, the upper half circle of the second guide pillar is wound in reverse, the upper end of the third guide pillar is skimmed, and a circle is wound on the outer side of the third guide pillar, so that the connecting wire can be fixed, the connecting wire is prevented from being disconnected from one end of the controller main body due to external pulling, the connecting wire and the controller main body are promoted to bear pressure stabilization debugging, and the use safety of the controller main body is guaranteed;

2. by arranging the sealing plate, the sealing seat, the limiting groove, the arc-shaped plates, the convex plates and the connecting frame columns, through the two groups of sealing seats, external liquid can be prevented from entering the inside of the protective shell, the controller main body can be protected, the pull rod is pushed downwards to enable the connector column and the convex plates to extrude the two groups of arc-shaped plates, one ends of the convex plates can be moved out of the limiting groove, one ends of the sealing seats can be conveniently moved out of the sealing plate, and similarly, one ends of the sealing seats can be inserted into the sealing plate by pressing the pull rod downwards, and under the elastic force of the two groups of arc-shaped plates, the two groups of arc-shaped plates can push the convex plates to move upwards, one ends of the convex plates can be inserted into the limiting groove, so that the sealing seats can be installed and fixed, liquid is prevented from entering the inside of the controller main body, and the safety of the device is further improved;

3. by arranging the long columns, the moving parts, the rotating plates and the fastening frame bases, when the protective shell is installed at the upper ends of the base and the bottom plate, the two groups of trapezoidal columns and the two groups of trapezoidal columns in the protective shell can move downwards, one ends of the trapezoidal columns push the rotating plates to move upwards under the matching of the long columns and the fixed plate, the rotating plates can rotate in the moving parts, the other ends of the rotating plates push the connecting columns to move downwards, and under the lever principle, the connecting columns can push the fastening frame bases to move towards the upper ends of the first guide columns, the second guide columns and the three groups of guide columns, so that the connecting lines can be further fixed, the fastening of the connecting lines on the outer sides of the first guide columns, the second guide columns and the third guide columns is increased, and the connection between the connecting lines and the controller main body is improved;

4. through setting up the rectangular, supporting spring, convex post and holding frame, through pressing two sets of holding frames, the one end of its holding frame extrudees supporting spring through the convex post, insert the inside of storage tank to the connecting wire this moment, and not hard up two sets of holding frames, under two sets of supporting spring's elasticity, its supporting spring can drive the inside removal at the storage tank of holding frame through the convex post, thereby can dredge the connecting wire, and prevent that the connecting wire from rocking in the inside of storage tank, prevent that the connecting wire from suffering wearing and tearing.

Drawings

FIG. 1 is a perspective view of a multi-circuit MMC-HVDC feed-in controller for a very weak grid in accordance with the present invention;

FIG. 2 is a perspective view of a partial structure of a controller for a multi-circuit MMC-HVDC feed-in very weak grid according to the present invention;

FIG. 3 is a perspective view of the internal structure of the base of a controller for a multi-circuit MMC-HVDC feed-in very weak grid according to the present invention;

FIG. 4 is a schematic perspective view of a controller base plate of a multi-circuit MMC-HVDC feed-in very weak power grid according to the present invention;

FIG. 5 is a schematic diagram of the internal structure of a sealing plate of a controller for feeding a multi-circuit MMC-HVDC to a very weak power grid according to the present invention;

FIG. 6 is a schematic diagram of the left side structure of the base and the protective housing of the controller of the multi-circuit MMC-HVDC feed-in very weak power grid according to the present invention;

FIG. 7 is a schematic diagram of the internal structure of a long board of a controller for feeding multi-circuit MMC-HVDC into a very weak power grid according to the present invention;

fig. 8 is an enlarged schematic diagram of a in fig. 7 of a controller for a multi-circuit MMC-HVDC feed very weak grid according to the present invention.

In the figure:

1. a base; 2. a protective shell; 3. a sealing plate; 4. a long column; 5. a long block; 11. a base plate; 12. a controller main body; 13. a triangular plate; 14. a first guide post; 15. a second guide pillar; 16. a third guide pillar; 21. a wire guide hole; 22. mounting a plate; 23. a display structure; 31. a pull rod; 32. a sealing seat; 33. a limiting groove; 34. an arc-shaped sheet; 35. a convex plate; 36. connecting a frame column; 41. a fixing plate; 42. a rotating plate; 43. a movable member; 44. a trapezoidal column; 45. connecting columns; 46. a fastening frame base; 51. a top plate; 52. a storage tank; 53. a spring frame; 54. a support spring; 55. a convex post; 56. a clamping frame; 511. a limiting plate; 512. a shaft seat; 513. a shaft rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to FIGS. 1-8: a controller for feeding a multi-circuit MMC-HVDC extremely-weak power grid comprises a base 1 and a controller main body 12, wherein a protective shell 2 is arranged at the upper end of the base 1, a bottom plate 11 is welded at one end of the base 1, a triangular disc 13 is arranged at the upper end of the bottom plate 11, a first guide pillar 14 is arranged at the upper end of the triangular disc 13, a second guide pillar 15 is arranged at the upper end of the triangular disc 13 and on the right side of the first guide pillar 14, and a third guide pillar 16 is arranged at the upper end of the triangular disc 13 and in front of the first guide pillar 14 and the second guide pillar 15; the upper end of the bottom plate 11 is provided with long columns 4, the upper ends of two groups of long columns 4 are provided with a fixed plate 41, the interior of the protective shell 2 is provided with a rotating plate 42, one end of the rotating plate 42 is movably provided with a movable part 43, one end of the rotating plate 42 is provided with a trapezoidal column 44, the interior of the protective shell 2 and the middle part of the two groups of trapezoidal columns 44 are provided with a connecting column 45, the lower end of the connecting column 45 is provided with a fastening frame seat 46, one end of the trapezoidal column 44 penetrates through one end of the protective shell 2 to be connected with the upper end of the fixed plate 41, one end of the two groups of rotating plates 42 is connected with the left side and the right side of the connecting column 45, through the arrangement of the long plates, the first guide column 14, the second guide column 15 and the third guide column 16, the lower half circle wound by the first guide column 14 wound on one side of the connecting line is taken up, and the upper half circle wound by the second guide column 15 is wound on the other side, the upper end of the third guide column 16 is left side of the third guide column, thereby can fix the connecting wire, in order to prevent that the outside from dragging from leading to the connecting wire to break off from the one end of controller main part 12, promote connecting wire and controller main part 12 and accept steady voltage debugging, ensure the safety in utilization to controller main part 12, secondly, through setting up long post 4, moving part 43, rotor plate 42 and fastening frame seat 46, when the protective housing 2 is installed the upper end of base 1 and bottom plate 11, two sets of trapezoidal posts 44 and two sets of rotor plate 42 of protective housing 2 inside can move down, and under the cooperation of long post 4 and fixed plate 41, can make one end of its trapezoidal post 44 promote rotor plate 42 to move up, and rotor plate 42 can rotate in the inside of moving part 43, and then make the other end of rotor plate 42 promote spliced pole 45 to move down, and under its lever principle, its spliced pole 45 can promote fastening frame seat 46 to No. one guide pillar 14, the upper ends of the second guide post 15 and the third guide post move, so that the connecting wire can be further fixed, the fastening of the connecting wire on the outer sides of the first guide post 14, the second guide post 15 and the third guide post 16 is increased, and the connection between the connecting wire and the controller main body 12 is improved.

As shown in fig. 2 and 5, the upper end of the base 1 and the left and right sides of the controller body 12 are provided with the sealing plate 3, the upper end of the sealing plate 3 is provided with the pull rod 31, the right side of the sealing plate 3 is provided with the sealing seat 32, the lower end of the sealing seat 32 is provided with the limiting groove 33, the left and right side walls inside the sealing plate 3 are provided with the arc sheets 34, the upper ends of the two sets of arc sheets 34 are provided with the convex plate 35, the inside of the sealing plate 3 is provided with the connecting frame column 36, the lower end of the connecting frame column 36 is fixed with the upper end of the convex plate 35, the sealing seat 32 passes through the inside of the connecting frame column 36, the upper end of the convex plate 35 is arranged inside the limiting groove 33, by arranging the sealing plate 3, the sealing seat 32, the limiting groove 33, the arc sheets 34, the convex plate 35 and the connecting frame column 36, through the two sets of the sealing seats 32, can prevent that outside liquid from entering into the inside of protecting crust 2, can protect controller main part 12, through promoting pull rod 31 downwards, make it extrude two sets of arc pieces 34 through link post 36 and convex plate 35, can shift out the inside of spacing groove 33 to the one end of convex plate 35, conveniently shift out the one end of seal receptacle 32 from the inside of closing plate 3, and the same is said, through pressing pull rod 31 downwards, and insert the inside of closing plate 3 to the one end of seal receptacle 32, and under the elasticity of two sets of arc pieces 34, its two sets of arc pieces 34 can promote convex plate 35 rebound, and the inside of spacing groove 33 can be inserted to the one end of convex plate 35, thereby can install and fix seal receptacle 32, in order to prevent to have liquid to enter into the inside of controller main part 12, further increase the device's security.

As shown in fig. 7, the upper end of the bottom plate 11 is provided with an elongated block 5 near the right edge, one end of the upper end of the elongated block 5 is penetrated by a storage slot 52, a spring frame 53 is provided inside the elongated block 5, a support spring 54 is provided inside the spring frame 53, a convex post 55 is provided at one end of the support spring 54, one end of the convex post 55 is fixed to one end of a holding frame 56, a holding frame 56 is provided inside the storage slot 52, three groups of storage slots 52 are equidistantly provided at one end of the elongated block 5, a plurality of groups of spring frames 53 are equidistantly distributed inside the elongated block 5, by providing the elongated block 5, the support spring 54, the convex post 55 and the holding frame 56, by pressing two groups of holding frames 56, one end of the holding frame 56 presses the support spring 54 through the convex post 55, at this time, the connection wire is inserted into the storage slot 52, and the two groups of holding frames 56 are loosened, under the elastic force of the two groups of support springs 54, the support spring 54 can drive the holding frame 56 to move inside the storage slot 52 through the convex post 55, thereby enabling the connection wire to be guided, and preventing the connection wire from being worn and from shaking.

According to fig. 7 and 8, the upper end of rectangular 5 is provided with roof 51, the top of roof 51 is provided with limiting plate 511, the inside of roof 51 is provided with axle bed 512, the lower extreme of limiting plate 511 is provided with axostylus axostyle 513, the one end movable mounting of axostylus axostyle 513 is in the inside of axle bed 512, through roof 51, the cooperation of axle bed 512 and axostylus axostyle 513, through removing limiting plate 511, make it drive axostylus axostyle 513 rotate in the inside of axle bed 512, and the one end of axostylus axostyle 513 is rotatory at roof 51, can be convenient for limiting plate 511 is rotatory in the top of roof 51, conveniently lead the connecting wire, and simultaneously, can block the connecting wire, prevent that the connecting wire breaks away from the inside of rectangular 5.

According to fig. 1, the front end of the protective shell 2 is penetrated through and is provided with the wire guide 21, the upper end of the protective shell 2 is provided with the display structure 23, the controller main body 12 can be protected by being provided with the protective shell 2, the three groups of wire guide 21 are arranged, the connecting wires can be conveniently dredged, the display structure 23 is arranged, the data of the worker on the controller main body 12 can be conveniently penetrated, and the worker can know the condition of the controller main body 12 conveniently.

According to fig. 3, 4, 7 and 8, three groups of top plates 51 are equidistantly distributed at the upper end of the long block 5, the three groups of top plates 51 are positioned right above the three groups of storage grooves 52, the three groups of storage grooves 52 can be conveniently matched by arranging the three groups of top plates 51, and the three groups of connecting wires are conveniently led out from the inside of the three groups of storage grooves 52 respectively, so that the three groups of connecting wires are prevented from knotting.

According to the embodiment shown in fig. 1-3, the mounting plates 22 are welded on the left side and the right side of the base 1 and the protective shell 2, the plurality of groups of mounting plates 22 are equidistantly distributed at the left and right corners of the protective shell 2, and the base 1 and the protective shell 2 can be conveniently mounted by providing the four groups of mounting plates 22, so that the controller main body 12 is conveniently protected, and the base 1 is also conveniently mounted.

According to the structure shown in fig. 3 and 4, the first guide post 14, the second guide post 15 and the third guide post 16 are distributed at the upper end of the triangular plate 13 in a triangular shape, the three triangular plates 13 are distributed at the upper end of the bottom plate 11 at equal intervals, the first guide post 14, the second guide post 15 and the third guide post 16 are designed, so that the connecting wire can be conveniently fixed, the connecting wire is prevented from being disconnected from one end of the controller main body 12, the controller can be ensured to be normally used, the first guide post 14, the second guide post 15 and the third guide post 16 can be fixed by the triangular plate 13, and the stability of the first guide post 14, the second guide post 15 and the third guide post 16 is ensured.

According to fig. 6, the front end and the rear end of the movable member 43 are installed at the front end and the rear end inside the protective shell 2, the fastening frame base 46 is located right above the three triangular discs 13, and the movable member 43 is arranged, so that the rotating plate 42 can move on one side of the movable member 43 conveniently, and the rotating plate 42 can rotate inside the protective shell 2.

According to the illustration in fig. 1-4, the controller body 12 is installed on the upper end of the base 1, the three connectors of the controller body 12 are respectively aligned with the three triangular discs 13, and the three connectors of one end of the controller body 12 can be conveniently butted with the three connectors of one end of the controller body 13 under the cooperation of the three triangular discs 13, so that the three connecting lines are independently fixed, and the knotting phenomenon of the three connecting lines is prevented.

The working principle of the invention is as follows: when in use, firstly, three groups of connecting wires are connected with the lower end of the controller main body 12, and the lower half circle wound by the first guide post 14 is respectively taken up from one side of the three groups of connecting wires, and then the upper half circle wound by the second guide post 15 is reversely wound, the upper end of the third guide post 16 is leftwards turned, and a circle is wound outside the third guide post 16, so that the connecting wires can be fixed, so as to prevent the connecting wires from being disconnected from one end of the controller main body 12 due to external pulling, the connecting wires and the controller main body 12 are lifted to bear pressure stabilization, so as to ensure the use safety of the controller main body 12, then, the three groups of moving limiting plates 511 are respectively rotated to drive the shaft 513 to rotate in the shaft seat 512, one end of the shaft 513 rotates on the top plate 51, so that the limiting plates 511 can conveniently rotate above the top plate 51, the three groups of connecting wires are respectively placed in the three groups of storage grooves 52, then the two groups of clamping frames 56 are pressed, one end of the clamping frames 56 presses the supporting springs 54 through the convex columns 55 to press the supporting springs 54, so that the two groups of the connecting wires are prevented from being matched with the protective frames 44, so that the lower end of the protective frame 56 can be pushed by the protective frame 52 and the protective plate 4, so that the protective frame 22 and the protective frame can be pushed to move under the protective frame 4, so that the protective frame can be matched with the protective frame 4, and the rotating plate 42 can rotate in the moving part 43, and further the other end of the rotating plate 42 pushes the connecting column 45 to move downwards, and under the lever principle, the connecting column 45 can push the fastening frame seat 46 to move towards the upper ends of the first guide column 14, the second guide column 15 and the three guide columns, so that the connecting line can be further fixed, the fastening of the connecting line on the outer sides of the first guide column 14, the second guide column 15 and the third guide column 16 is increased, the connection between the connecting line and the controller main body 12 is improved, finally, when the sealing seat 32 needs to be disassembled, the pull rod 31 is pushed downwards, so that the connecting line extrudes the two groups of arc-shaped sheets 34 through the connecting frame column 36 and the convex plate 35, one end of the convex plate 35 can be moved out of the limiting groove 33, so that one end of the sealing seat 32 can be conveniently moved out of the sealing plate 3, and similarly, one end of the sealing seat 32 is inserted into the sealing plate 3, and under the elasticity of the two groups of arc-shaped sheets 34, one end of the convex plate 35 can be pushed upwards, and one end of the sealing seat 32 can be further inserted into the sealing plate 32, so that the safety device can be further installed in the limiting groove and the sealing seat and the liquid can be prevented from entering the sealing seat 12.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A controller for multi-circuit MMC-HVDC feed into very weak grids, comprising a base (1) and a controller body (12), characterized in that: the protective shell (2) is arranged at the upper end of the base (1), a bottom plate (11) is welded at one end of the base (1), a triangular disc (13) is arranged at the upper end of the bottom plate (11), a first guide pillar (14) is arranged at the upper end of the triangular disc (13), a second guide pillar (15) is arranged at the upper end of the triangular disc (13) and positioned on the right side of the first guide pillar (14), and a third guide pillar (16) is arranged at the upper end of the triangular disc (13) and positioned in front of the first guide pillar (14) and the second guide pillar (15);

the upper end of the bottom plate (11) is provided with long columns (4), the upper ends of two groups of long columns (4) are provided with fixing plates (41), rotating plates (42) are arranged inside the protective shell (2), moving parts (43) are movably mounted at one ends of the rotating plates (42), trapezoidal columns (44) are arranged at one ends of the rotating plates (42), connecting columns (45) are arranged inside the protective shell (2) and in the middle of the two groups of trapezoidal columns (44), fastening frame seats (46) are arranged at the lower ends of the connecting columns (45), one ends of the trapezoidal columns (44) penetrate through one ends of the protective shell (2) to be connected with the upper ends of the fixing plates (41), and one ends of the two groups of rotating plates (42) are connected with the left side and the right side of the connecting columns (45);

one side of the connecting wire is wound with the lower half circle wound by the first guide post (14), and then is wound with the upper half circle of the second guide post (15) in turn, and the lower half circle is skimmed to the upper end of the third guide post (16), and is wound with one circle on the outer side of the third guide post (16), so that the connecting wire can be fixed;

when the protective shell (2) is arranged at the upper ends of the base (1) and the bottom plate (11), two groups of trapezoidal columns (44) and two groups of rotating plates (42) in the protective shell (2) can move downwards, one end of each trapezoidal column (44) can push the corresponding rotating plate (42) to move upwards under the cooperation of the long columns (4) and the fixed plate (41), the corresponding rotating plate (42) can rotate inside the corresponding moving part (43), the other end of each rotating plate (42) can push the corresponding connecting column (45) to move downwards, and under the lever principle, the corresponding connecting column (45) can push the corresponding fastening frame seat (46) to move towards the upper ends of the first guide column (14), the second guide column (15) and the three groups of guide columns, so that connecting lines can be further fixed.

2. A controller of a multi-circuit MMC-HVDC feed-in very weak grid according to claim 1, characterized in that: the utility model discloses a controller, including base (1), closing plate (3), sealing plate (3) and sealing seat (32), spacing groove (33) have been seted up to the lower extreme of sealing seat (32), the inside left and right sides lateral wall of closing plate (3) is provided with arc piece (34), and is two sets of the upper end of arc piece (34) is provided with convex plate (35), the inside of closing plate (3) is provided with connecting frame post (36), the lower extreme of connecting frame post (36) is fixed mutually with the upper end of convex plate (35), sealing seat (32) pass the inside that sets up in connecting frame post (36), the upper end setting of convex plate (35) is in the inside of spacing groove (33).

3. A controller for a multi-circuit MMC-HVDC feed very weak grid according to claim 1, characterized in that: the upper end of bottom plate (11) is close to right side border position department and is provided with rectangular block (5), the upper end one end of rectangular block (5) is run through and has been seted up storage tank (52), the inside of rectangular block (5) is provided with spring frame (53), the inside of spring frame (53) is provided with supporting spring (54), the one end of supporting spring (54) is provided with convex post (55), the one end of convex post (55) is fixed mutually with the one end of holding frame (56), the inside of storage tank (52) is provided with holding frame (56), three groups the one end in rectangular block (5), a plurality of groups are seted up to storage tank (52) equidistance spring frame (53) equidistance distribution is in the inside of rectangular block (5).

4. A controller of a multi-circuit MMC-HVDC feed-in very weak grid according to claim 3, characterized in that: the upper end of the long block (5) is provided with a top plate (51), a limiting plate (511) is arranged above the top plate (51), a shaft seat (512) is arranged inside the top plate (51), a shaft rod (513) is arranged at the lower end of the limiting plate (511), and one end of the shaft rod (513) is movably installed inside the shaft seat (512).

5. A controller of a multi-circuit MMC-HVDC feed-in very weak grid according to claim 1, characterized in that: the front end of the protective shell (2) is provided with a wire guide hole (21) in a penetrating mode, and the upper end of the protective shell (2) is provided with a display structure (23).

6. A controller for a multi-circuit MMC-HVDC feed-in very weak grid according to claim 4, characterized in that: the three groups of top plates (51) are distributed at the upper end of the long block (5) at equal intervals, and the three groups of top plates (51) are positioned right above the three groups of storage grooves (52).

7. A controller for a multi-circuit MMC-HVDC feed-in very weak grid according to claim 5, characterized in that: the left and right sides of base (1) and protecting crust (2) all welds there are mounting panel (22), a plurality of groups mounting panel (22) equidistance distributes in the four corners department of controlling of protecting crust (2).

8. A controller of a multi-circuit MMC-HVDC feed-in very weak grid according to claim 1, characterized in that: the first guide post (14), the second guide post (15) and the third guide post (16) are distributed at the upper end of the triangular disc (13) in a triangular shape, and the three triangular discs (13) are distributed at the upper end of the bottom plate (11) at equal intervals.

9. The controller of claim 7, wherein the controller comprises: the front end and the rear end of the movable piece (43) are arranged at the front end and the rear end of the inside of the protective shell (2), and the fastening frame seat (46) is positioned right above the three groups of triangular plates (13).

10. A controller of a multi-circuit MMC-HVDC feed-in very weak grid according to claim 8, characterized in that: the upper end at base (1) is installed in controller main part (12), three groups of connectors of controller main part (12) align with directly over three groups of triangle dish (13) respectively.