CN112185665A

CN112185665A - Valve side wire outlet device of +/-1100 kV converter transformer

Info

Publication number: CN112185665A
Application number: CN201910603681.3A
Authority: CN
Inventors: 陈兴刚; 王健; 徐思华; 李桂苹; 苑东升; 汪斌
Original assignee: Tebian Electric Apparatus Stock Co Ltd; TBEA Shenyang Transformer Group Co Ltd
Current assignee: Tebian Electric Apparatus Stock Co Ltd; TBEA Shenyang Transformer Group Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2021-01-05

Abstract

本发明公开一种±1100kV换流变压器阀侧出线装置，包括上部出线装置、上部屏蔽管、中部屏蔽管、下部屏蔽管、升高座下部屏蔽环以及阀侧升高座，其中上部出线装置通过上部出线固定装置固定在阀侧升高座，上部屏蔽管、中部屏蔽管和下部屏蔽管连接成一个整体屏蔽管，整体设于阀侧升高座中；上上部出线固定装置包括绝缘螺杆、撑条固定垫块，其中，撑条嵌入固定垫块中两端伸出，撑条一端通过绝缘螺杆固定在阀侧升高座上，多个固定垫块均布在上部出线装置外周；多个固定垫块两两一组，底部共用一个固定支架支撑。本发明解决了±1100kV换流变压器阀侧出线装置的难点设计，为后续±1100kV出线装置的结构设计，提供了有效的思路和参考。The invention discloses a valve side outlet device of a ±1100kV converter transformer, comprising an upper outlet device, an upper shielding tube, a middle shielding tube, a lower shielding tube, a lower shielding ring of a raised seat and a valve side raising seat, wherein the upper outlet device passes through the upper outlet. The fixing device is fixed on the valve side raised seat, and the upper shielding tube, the middle shielding tube and the lower shielding tube are connected to form an integral shielding tube, which is integrally set in the valve side rising seat; the upper and upper outlet wire fixing devices include insulating screws, stay fixing pads , among which, the struts are embedded in the fixed pads and protrude at both ends, one end of the struts is fixed on the valve side raised seat by insulating screws, and a plurality of fixed pads are evenly distributed on the outer periphery of the upper outlet device; group, the bottom is supported by a fixed bracket. The invention solves the difficult design of the valve side outlet device of the ±1100kV converter transformer, and provides an effective idea and reference for the subsequent structural design of the ±1100kV outlet device.

Description

Valve side wire outlet device of +/-1100 kV converter transformer

Technical Field

The invention relates to a transformer manufacturing technology, in particular to a valve side wire outlet device of a +/-1100 kV converter transformer.

Background

The valve side wire outlet device is used for shielding a lead between a valve side coil and a sleeve of the extra-high voltage direct current converter transformer, improves the distribution of alternating current and direct current electric fields at the tail parts of the valve side lead and the valve side sleeve, and ensures the insulation distance of the sleeve and the lead to other parts, so that the converter transformer can be safely and reliably operated in a net hanging mode.

With the development of the +/-1100 kV direct-current transmission project, a +/-1100 kV converter transformer is developed as a key in direct-current transmission. The transformer is the most different from the prior engineering in that the insulation level of the valve side reaches +/-1100 kV, and the voltage is the transformer with the highest insulation level so far. The +/-800 kV is the highest insulation level of the front valve side, and the +/-1100 kV does not have reference to practical engineering experience at home and abroad, so the valve side wire outlet device is one of the greatest difficulties in the development of the converter transformer, whether the structure of the valve side wire outlet device is safe and reliable or not also directly influences the safety performance of the product test or the net hanging operation of the converter transformer, and the valve side wire outlet device of the +/-1100 kV converter transformer is needed to solve the problems.

Disclosure of Invention

Aiming at the defects that the valve side wire outlet device of the converter transformer in the prior art cannot meet the insulation level of +/-1100 kV voltage and the like, the invention aims to provide the valve side wire outlet device of the +/-1100 kV converter transformer, which can ensure the safety performance of the product test or the net hanging operation of the converter transformer.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention relates to a valve side wire outlet device of a +/-1100 kV converter transformer, which comprises an upper wire outlet device, an upper shielding tube, a middle shielding tube, a lower shielding ring of a lifting seat and a valve side lifting seat, wherein the upper wire outlet device is fixed on the valve side lifting seat through an upper wire outlet fixing device, and the upper shielding tube, the middle shielding tube and the lower shielding tube are connected into an integral shielding tube which is integrally arranged in the valve side lifting seat.

The upper wire outlet device is composed of a plurality of layers of corrugated boards and is fixed on the valve side lifting seat through an upper wire outlet fixing device.

The upper outgoing line fixing device comprises an insulating screw and a stay fixing cushion block, wherein two ends of the stay embedded in the fixing cushion block extend out, one end of the stay is fixed on the valve side lifting seat through the insulating screw, and a plurality of fixing cushion blocks are uniformly distributed on the periphery of the upper outgoing line device; a plurality of fixed cushion blocks are pairwise grouped, and the bottoms of the fixed cushion blocks share one fixed support for supporting.

And the inside of the upper shielding pipe and the inside of the lower shielding pipe are respectively provided with a pressure equalizing ball.

The integral shielding pipe is fixed on the valve side lifting seat through an upper shielding pipe fixing wire clamp and a lower shielding pipe fixing wire clamp I.

The upper shielding tube fixed conductor clamp and the lower shielding tube fixed conductor clamp have the same structure and respectively comprise an insulating cylinder, a first conductor clamp, a second conductor clamp and a clamp hoop, wherein the insulating cylinder is fixed at two ends of the shielding tube by using a paperboard cushion block, and a plurality of limiting bulges are arranged at the end part of the paperboard cushion block; the first wire clamp and the second wire clamp fix the two sides of the insulating cylinder through fasteners through clamping hoops.

The first wire clamp and the second wire clamp are mutually fixed by adopting a plurality of layers of paperboards, one end of the first wire clamp is fixed on the lifting seat, and the other end of the first wire clamp and the second wire clamp fix the shielding pipe in the center of the lifting seat by utilizing the clamp.

The lower part of the valve side lifting seat is provided with a shielding ring.

The invention has the following beneficial effects and advantages:

1. because the +/-1100 kV converter transformer is firstly developed, the structure and the installation process of other wire outlet devices are also firstly developed, and the invention is directly applied to +/-1100 kV direct-current transmission engineering, thereby not only solving the difficult design of the wire outlet device at the valve side of the +/-1100 kV converter transformer, but also providing effective thinking and reference for the structural design of the subsequent +/-1100 kV wire outlet device.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of an upper outlet fixture according to the present invention;

fig. 3 is a schematic view of a structure of a shield tube fixing wire clamp according to the present invention.

Wherein, 1 is the upper portion device of being qualified for the next round of competitions, 2 is the upper portion fixing device of being qualified for the next round of competitions, 3 is upper portion shielding pipe fixed conductor clamp, 4 is upper portion shielding pipe, 5 is middle part shielding pipe, 6 is lower part shielding pipe fixed conductor clamp, 7 is lower part shielding pipe, 8 is the shield ring, 9 is valve side lift seat, 10 is fixed cushion, 11 is the stay, 12 is insulating screw, 13 is the fixed bolster, 14 is the insulating cylinder, 15 is first fixed conductor clamp, 16 is the fixed conductor clamp of second, 17 is the fixed clamp hoop, 18 is spacing arch.

Detailed Description

The invention is further elucidated with reference to the accompanying drawings.

As shown in fig. 1, the valve side outlet device of the ± 1100kV converter transformer of the present invention comprises an upper outlet device 1, an upper shielding tube 4, a middle shielding tube 5, a lower shielding tube 7, a lower shielding ring 8 of a lifting seat and a valve side lifting seat 9, wherein the upper outlet device 1 is fixed on the valve side lifting seat 9 through an upper outlet fixing device 2, the upper shielding tube 4, the middle shielding tube 5 and the lower shielding tube 7 are connected into an integral shielding tube, and the integral shielding tube is arranged in the valve side lifting seat 9.

In this embodiment, the upper outlet device 1 is formed of a multi-layer corrugated cardboard, and the upper outlet device 1 is fixed to the valve-side elevation base 9 by the upper outlet fixing device 2.

As shown in fig. 2, the upper outlet fixing device 2 includes an insulating screw 12, a stay 11 and fixing cushion blocks 10, wherein the stay 11 is embedded into the fixing cushion blocks 10, and two ends of the stay 11 extend out, one end of the stay 11 is fixed on the valve side lifting seat 9 through the insulating screw 12, and a plurality of fixing cushion blocks 10 are uniformly distributed on the periphery of the upper outlet device 1, so that the outlet device can be prevented from being eccentric, and the creepage distance can be increased; a plurality of fixed cushion blocks 10 are grouped in pairs, and the bottoms of the fixed cushion blocks share one fixed bracket 13 for supporting.

The inside of upper portion shield tube 4 and the inside of lower part shield tube 7 all are equipped with the pressure-equalizing ball. The integral shield pipe is fixed to the valve side elevation seat 9 by an upper shield pipe fixing wire clamp 3 and a lower shield pipe fixing wire clamp 6.

As shown in fig. 3, the upper shield tube fixed conductor clamp 3 and the lower shield tube fixed conductor clamp 6 have the same structure, and each of them includes an insulating cylinder 14, a first conductor clamp 15, a second conductor clamp 16 and a clamp 17, wherein the insulating cylinder 14 is fixed at both ends of the shield tube 5 by a cardboard cushion block, and the end of the cardboard cushion block is provided with a plurality of limiting protrusions 18 to prevent the insulating cylinder from sinking due to weight; the first and

second wire clamps

15 and 16 fix both sides of the insulating cylinder 14 by clips 17.

First wire clamp 15, second wire clamp 16 all adopt multilayer cardboard reciprocal anchorage, and one end is fixed on valve side lift seat 9, and one end utilizes clamp 17 to fix the shielding pipe at the seat center that rises in addition, and first wire clamp 15, second wire clamp 16 self area regulatory function (multiplicable some regulation cardboards adjust the direction of height, and the wire presss from both sides the long-pending round hole of opening, and adjustment length side is total), just so can avoid the unable assembly because of the tolerance that produces in the production process. The first wire clamp 15 and the second wire clamp 16 are fixed by a plurality of layers of wire clamps to increase creepage distance, and the left side and the right side are fixed simultaneously, so that the eccentricity of the shielding cylinder can be prevented.

The valve side wire outlet device of the +/-1100 kV converter transformer is fixed on the valve side lifting seat 9 by the upper wire outlet fixing device 2 at the outer part and the upper part of the upper wire outlet device, and the upper wire outlet fixing device 2 not only effectively fixes the upper wire outlet device, ensures the wire outlet device to be concentric with the lifting seat, but also effectively increases the creepage distance.

The upper shielding tube 4, the middle shielding tube 5 and the lower shielding tube 7 are connected into a whole through the connecting piece, the upper shielding tube 4 internally contains a voltage-sharing ball, the electric field of the tail part of the sleeve and the terminal can be effectively shielded, the lower shielding tube 7 also internally contains the voltage-sharing ball, and the electric field distribution of the lower end part of the valve side lifting seat is effectively improved.

One end of an upper shielding pipe fixing wire clamp 3 and one end of a lower shielding pipe fixing wire clamp 6 are fixed on a valve-9 side lifting seat, and the other end of the upper shielding pipe fixing wire clamp and the other end of the lower shielding pipe fixing wire clamp are fixed on an integral shielding pipe consisting of an upper shielding pipe 4, a middle shielding pipe 5 and a lower shielding pipe 7 so as to prevent the shielding pipes from moving in the lifting seat; the upper shield pipe fixing wire clamp 3 and the lower shield pipe fixing wire clamp 6 not only increase the creepage distance but also prevent the shield pipe from running in the valve side elevation seat 9.

And a shielding ring 8 is fixed at the lower part of the valve side lifting seat 9 and plays a role of shielding an electric field at a lower flange.

Claims

1. A valve side outlet device of ±1100kV converter transformer is characterized in that: comprising an upper outlet device, an upper shielding pipe, a middle shielding pipe, a lower shielding pipe, a lower shielding ring of the raised seat and a valve side raised seat, wherein the upper outlet device The upper outlet wire fixing device is fixed on the valve side rising seat, and the upper shielding pipe, the middle shielding pipe and the lower shielding pipe are connected to form an integral shielding pipe, which is integrally arranged in the valve side rising seat.

2 . The valve side outlet device of ±1100kV converter transformer according to claim 1 , wherein the upper outlet device is composed of multi-layer corrugated cardboard, and the upper outlet device is fixed on the valve side raised seat by the upper outlet fixing device. 3 .

3. The valve side outlet device of ±1100kV converter transformer according to claim 2, characterized in that: the upper outlet wire fixing device comprises an insulating screw rod and a stay fixing pad, wherein the stay is embedded in the fixing pad and protruding from both ends , one end of the stay is fixed on the valve side raised seat by an insulating screw, and a plurality of fixed pads are evenly distributed on the outer periphery of the upper outlet device;

4 . The valve side outlet device of ±1100kV converter transformer according to claim 1 , wherein a pressure equalizing ball is provided inside the upper shielding tube and inside the lower shielding tube. 5 .

5 . The valve side outlet device of ±1100kV converter transformer according to claim 1 , wherein the integral shielding tube is fixed on the valve side raised seat through the upper shielding tube fixing wire clip and the lower shielding tube fixing wire clip. 6 . .

6 . The valve side outlet device of ±1100kV converter transformer according to claim 5 , wherein the upper shielding tube fixing wire clip and the lower shielding tube fixing wire clip have the same structure, and both include an insulating cylinder and a first wire clip. 7 . , a second wire clip and a clamp, wherein the insulating cylinder is fixed at both ends of the shielding tube with cardboard spacers, and the end of the cardboard spacer is provided with a plurality of limit protrusions; the first wire clamp and the second wire clamp are insulated by the clamps. Both sides of the barrel are fixed by fasteners.

7. The valve side outlet device of ±1100kV converter transformer according to claim 6, characterized in that: the first wire clip and the second wire clip are fixed to each other by using multi-layer cardboard, one end is fixed on the raised seat, and the other end uses The clamps hold the shielded tube in the center of the riser.

8 . The valve side outlet device of the ±1100kV converter transformer according to claim 1 , wherein a shielding ring is provided at the lower part of the valve side raised seat. 9 .