CN204243481U - A 1000kV High Resistance Circuit Suspension Pipe Mother Structure - Google Patents

Abstract

The utility model provides a 1000kV high-resistance circuit suspension pipe mother structure, including a high-voltage shunt reactor, a voltage transformer, a lightning arrester, a GIS device, a main frame, a pipe mother and a slave frame, and the pipe mother is suspended between the main frame and the slave frame. Between the slave frames and insulated connection with the main frame and the slave frames respectively, the high-voltage shunt reactor, voltage transformer, lightning arrester and GIS equipment are electrically connected to the pipe mother through down-conductors respectively. Adopting the utility model can reduce the use amount of the pipe mother, greatly reducing the interaction force between the high-voltage shunt reactor, voltage transformer, lightning arrester or GIS equipment and the pipe mother under strong vibration conditions such as earthquakes, and, in There is no problem of interconnection force interference among the four components of high-voltage shunt reactor, voltage transformer, lightning arrester, and GIS equipment, thereby effectively improving the seismic performance of the 1000kV high-resistance circuit and having good economic benefits.

Description

A 1000kV High Resistance Circuit Suspension Pipe Mother Structure

technical field

The utility model relates to the technical field of high-resistance loop structures in UHV power transmission, in particular to a 1000kV high-resistance loop suspension pipe mother structure.

Background technique

The current UHV AC 1000kV substation is usually built in areas with an earthquake intensity of 7 degrees and below, and the 1000kV outgoing high-resistance circuit usually includes a high-voltage shunt reactor (referred to as "high-resistance", the same below), voltage transformers, arresters and GIS The four components of the equipment are electrically connected to the hard pipe mother through the high-voltage resistance bushing, and the pipe mother is electrically connected to the voltage transformer and the lightning arrester respectively. Therefore, the equipment is directly connected through the pipe mother to form a hard link structure. The disadvantages of using this hard link method are:

First, because the installation distance between the equipment needs to be designed according to the local conditions in consideration of the terrain of the 1000kV substation, if the distance between the equipment is large, and the equipment is directly connected through the pipe mother, it may cause the 1000kV outgoing line to be high. The pipe mother required for the anti-circuit circuit needs to be designed in sections, which is not conducive to ensuring the overall safety and reliability of the 1000kV outgoing high-resistance circuit.

Second, due to the high hardness of the pipe mother, the relative positions of the equipment directly connected through the pipe mother are fixed. If severe vibration occurs, such as an earthquake, a large interaction force will be generated between the equipment. Although the four components of GIS equipment (including GIS outlet bushing), surge arrester, voltage transformer, and high-resistance (including high-voltage bushing) can respectively meet the shock resistance of 0.4g (where g is the acceleration of gravity, the same below). Requirements, however, since these components and equipment are directly connected through hard pipe nuts, during severe earthquakes, the large interaction force between the equipment may cause equipment damage, paralyzing the entire high-resistance circuit, resulting in Huge economic loss.

Utility model content

The technical problem to be solved by the utility model is to provide a 1000kV high-resistance loop suspension pipe mother structure to improve the shock resistance of the 1000kV outlet high-resistance loop in view of the problems existing in the prior art.

The technical problem to be solved by the utility model is achieved by the following technical solutions: a 1000kV high-resistance loop suspension pipe mother structure, including high-voltage shunt reactors, voltage transformers, lightning arresters, GIS equipment, main frame, pipe mother and slave frame , the tube mother is suspended between the main frame and the slave frame, and is insulated and connected to the main frame and the slave frame respectively. electrical connection.

Preferably, the slave frame is insulated and connected to the pipe mother through a string of suspension insulators.

Preferably, the slave frame is a "herringbone" frame.

Preferably, the downconducting wires are arranged parallel to each other.

Preferably, the down conductor is a soft pure aluminum wire.

Preferably, the high-voltage shunt reactor is electrically connected to one end of the down-conductor through a high-voltage resistant bushing, and the other end of the down-conductor is electrically connected to the tube mother.

Preferably, the GIS equipment is electrically connected to one end of the down-conductor through the GIS outlet sleeve, and the other end of the down-conductor is electrically connected to the pipe mother.

Preferably, the output end of the tube mother is electrically connected to the power transmission line, and the power transmission line is insulated and connected to the main frame through a string of tensile insulators.

Preferably, the main frame is insulated and connected to the pipe mother through a series of suspension insulators.

Preferably, a ground wire is also included, and the ground wire is electrically connected to the main frame.

Compared with the prior art, the beneficial effect of the utility model is: by suspending the pipe mother between the main frame and the secondary frame, the high-voltage shunt reactor, voltage transformer, lightning arrester and GIS equipment pass through the down-conductor and the pipe respectively. The mother electrical connection makes the 1000kV high-resistance circuit composed of the above components and equipment form a soft connection structure, avoiding direct connection through the tube mother with relatively high hardness, and greatly reducing the need for high-voltage shunt reactors, voltage transformers, lightning arresters or GIS. The interaction force between the equipment and the pipe mother under strong vibration conditions such as earthquakes, and there is no interconnection force interference between the four components of the high-voltage shunt reactor, voltage transformer, lightning arrester, and GIS equipment. The problem, therefore, can effectively improve the anti-seismic performance of the 1000kV high-resistance circuit, ensure that it still has relatively high reliability in the 8-degree earthquake area, and has good economic benefits.

Description of drawings

Fig. 1 is a structural diagram of a 1000kV high-resistance circuit suspension pipe parent structure of the utility model.

Marks in the figure: 1-high-voltage shunt reactor, 2-high-voltage bushing, 3-voltage transformer, 4-down conductor, 5-transmission line, 6-tension insulator string, 7-ground wire, 8- Main frame, 9-pipe mother, 10-slave frame, 11-suspension insulator string, 12-arrestor, 13-GIS outlet bushing, 14-GIS equipment.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a 1000kV high-resistance circuit suspension pipe mother structure is mainly composed of high voltage shunt reactor 1, voltage transformer 3, lightning arrester 12, GIS equipment 14, main frame 8, pipe mother 9 and slave frame 10 , the tube mother 9 is suspended between the main frame 8 and the secondary frame 10, and its two ends are respectively insulated and connected to the main frame 8 and the secondary frame 10 through the suspension insulator string 11. The high-voltage shunt reactor 1 and the voltage transformer 3. The lightning arrester 12 and the GIS equipment 14 are electrically connected to the pipe mother 9 through the down conductor 4 respectively. There are four down-conducting wires 4, which are arranged parallel to each other, and the four down-conducting wires 4 are pure aluminum flexible wires. Therefore, the high-voltage shunt reactor 1, voltage transformer 3, lightning arrester 12 and GIS equipment 14 respectively form a soft connection structure through the down conductor 4 and the tube mother 9, instead of directly passing through the relatively hard tube. Female 9 is directly connected. More importantly, this flexible connection structure enables the high-voltage shunt reactor 1, voltage transformer 3, lightning arrester 12 and GIS equipment 14 to have a certain degree of spatial freedom relative to the pipe mother 9. When the 1000kV high When the anti-circuit encounters severe vibration, such as when a strong earthquake occurs, the high-voltage shunt reactor 1, voltage transformer 3, lightning arrester 12 and GIS equipment 14 can respectively buffer the movement relative to the tube mother 9, and this buffer can greatly reduce High-voltage shunt reactor 1, voltage transformer 3, lightning arrester 12 or GIS equipment 14 and the interaction force between pipe mother 9 under strong vibration conditions such as earthquakes; and, in high-voltage shunt reactor 1, voltage transformer 3, The arrester 12 and the GIS equipment 14 do not have the problem of interconnection force interference between the four components and equipment. Therefore, the anti-seismic performance of the 1000kV high-resistance circuit is effectively improved to ensure that it still has relatively high reliability in the 8-degree earthquake area. sex.

The four down-conductors 4 are arranged parallel to each other, so that the distances between the parts of any two down-conductors 4 can be substantially consistent, which is beneficial to reduce the collision between the down-conductors 4 during earthquakes. The chance of improving the operation safety of the 1000kV high-resistance circuit; the four down conductors 4 can all be made of pure aluminum soft wire, which has good toughness and electrical conductivity, good tensile performance, and can well meet the requirements of 1000kV The anti-seismic demand of the high resistance circuit, and the use cost is low, which has good economic benefits.

In the above-mentioned 1000kV high-resistance circuit, the slave frame 10 can adopt a "herringbone" frame, so that there are only two connection points between the slave frame 10 and its installation foundation, so that the slave frame 10 has a certain degree of freedom to swing, reducing the From the destructive force of the frame 10 on the connection system of the 1000kV high-resistance circuit, the anti-seismic capability of the 1000kV high-resistance circuit is further improved. The output end of the tube mother 9 is electrically connected to the power transmission line 5, and the power transmission line 5 is insulated and connected to the main frame 8 through the tension insulator string 6. This structure can make the power transmission line 5 relative to the main frame 8 and the power transmission line 5. Compared with the pipe mother 9, it has a certain degree of freedom to swing. When an earthquake occurs, it can reduce the interaction force between the transmission line 5, the main frame 8 and the pipe mother 9, and then buffer the vibration of the pipe mother 9 to the high-voltage shunt reactor. 1. The destructive force of voltage transformer 3, lightning arrester 12 and GIS equipment 14 is conducive to improving the anti-seismic capability of the 1000kV high-resistance circuit and ensuring its operational reliability.

Since 1000kV belongs to the UHV voltage level, when the 1000kV high-resistance circuit is in operation, the strong electric field and strong magnetic field generated by the 1000kV UHV will cause strong electromagnetic interference to the high-voltage shunt reactor 1 and GIS equipment in the high-resistance circuit , in order to ensure the normal operation of the high-voltage shunt reactor 1 and the GIS equipment 14, the high-voltage shunt reactor 1 can be electrically connected to one end of the down-conductor 4 through the high-voltage bushing 2, and the other end of the down-conductor 4 is connected to the tube mother 9 is electrically connected; similarly, the GIS equipment 14 is electrically connected to one end of the down-conductor 4 through the GIS outlet sleeve 13, and the other end of the down-conductor 4 is electrically connected to the tube mother 9. Among them, the high-voltage bushing 2 and the GIS outlet bushing 13 can respectively ensure the electrical connection between the high-voltage shunt reactor 1, the GIS equipment 14 and the tube mother 9, and can also protect the high-voltage shunt reactor 1 and the GIS equipment 14. It plays a certain role of electromagnetic shielding, which is beneficial to improving the operation reliability of the high-voltage shunt reactor 1 and the GIS equipment 14 . As shown in FIG. 1 , the ground wire 7 is electrically connected to the top of the main frame 8 so that the ground wire 7 is in an overhead state to improve the operating safety factor of the 1000kV high-resistance circuit.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model , should be included within the protection scope of the present utility model.

Claims (10)

1. a 1000kV high-resistance loop column pipe parent structure, comprise high-voltage shunt reactor (1), voltage transformer (3), lightning arrester (12), GIS device (14) and main truss (8) and pipe mother (9), it is characterized in that: also comprise from framework (10), described pipe mother (9) is suspended in main truss (8) and between framework (10), and respectively with main truss (8), connect from framework (10) insulation, described high-voltage shunt reactor (1), voltage transformer (3), lightning arrester (12) and GIS device (14) are electrically connected with pipe mother (9) respectively by drawing lower wire (4).

2. 1000kV high-resistance loop column pipe parent structure according to claim 1, is characterized in that: described insulation with pipe mother (9) by suspension insulator (11) from framework (10) is connected.

3. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, is characterized in that: described from framework (10) be " people " font framework.

4. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, is characterized in that: described in draw between lower wire (4) arranged in parallel.

5. 1000kV high-resistance loop column pipe parent structure according to claim 4, is characterized in that: described in draw lower wire (4) for fine aluminium flexible conductor.

6. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, it is characterized in that: described high-voltage shunt reactor (1) by high resistance bushing (2) with draw lower wire (4) one end and be electrically connected, described in draw lower wire (4) other end and be electrically connected with pipe mother (9).

7. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, it is characterized in that: described GIS device (14) by GIS outlet casing tube (13) with draw lower wire (4) one end and be electrically connected, described in draw lower wire (4) other end and be electrically connected with pipe mother (9).

8. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, it is characterized in that: described pipe mother (9) output is electrically connected with transmission line (5), described transmission line (5) to be insulated with main truss (8) by strain insulator string (6) and is connected.

9. 1000kV high-resistance loop column pipe parent structure according to claim 8, is characterized in that: described main truss (8) to be insulated with pipe mother (9) by suspension insulator (11) and is connected.

10. the 1000kV high-resistance loop column pipe parent structure according to claims 1 or 2, it is characterized in that: also comprise ground wire (7), described ground wire (7) is electrically connected with main truss (8).