CN206922201U - The special hardware fitting structure of converter power transformer net side inlet wire - Google Patents

Abstract

The utility model discloses a special fitting structure for the incoming line of the converter transformer network side, which is located on the firewall (12), and the two ends of the upper jumper (8) pass through the tension insulator string (11) and the transmission tower. fixed, the transition section between the upper jumper (8) and the tension insulator string (11) is provided with a down-lead (7), and the other end of the down-lead (7) is connected to the The first pipe mother section (9) is connected, and the two ends of the first pipe mother section (9) are lapped on the post insulator (5) and the lightning arrester connecting wire terminal (6). On the same horizontal line as the section (9), there is a second pipe mother section (10), and the two ends of the second pipe mother section (10) are overlapped between the post insulator (5) and the radio interference On the filter capacitor (4), it overcomes the shortcomings in the prior art that the transformer bushing bears static load for a long time, which will aggravate equipment aging and shorten the service life, and has the advantages of improving the operation reliability and stability of the UHV converter station.

Description

Special fittings structure for grid side incoming line of converter transformer

technical field

The utility model relates to the technical field of direct current transmission engineering, and more specifically relates to a special fitting structure for a converter transformer network side incoming line.

Background technique

Transformer is the core component of substation and converter station operation. In the 1000kV AC UHV substation, the transformer bushing input line adopts four-split large-diameter wires with thick diameter and high rigidity, which will generate a large load on the transformer bushing terminals. In the ultra-high voltage converter station where the AC is connected to the 1000/500kV power system in layers, the wiring method of the converter transformer connected to the 1000kV AC grid side is similar to that of the AC UHV substation. Aging, shortened service life, and even breakage of equipment terminals or deformation of the top of the bushing, resulting in serious accidents such as gas leakage and internal discharge of the bushing.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology, and propose a special fitting structure for the incoming line of the converter transformer network side.

The purpose of this utility model is implemented through the following technical scheme: the special fitting structure for the incoming line of the converter transformer grid side, which is located on the firewall, and includes the converter transformer bushing fittings, the tube mother section fittings, and the converter transformer grid side fittings. Bushing terminals, radio interference filter capacitors, post insulators, lightning arrester terminals, down-conductors, upper jumper wires, first tube parent section, second tube parent section and strain insulator strings;

The two ends of the upper jumper are fixed to the transmission tower through the tension insulator string, and a down conductor is set at the transition section between the upper jumper and the tension insulator string, and the down conductor The other end of the line is connected to the first pipe mother section arranged below, and the two ends of the first pipe mother section are lapped on the post insulator and the lightning arrester connecting line terminal, and on the same horizontal line of the first pipe mother section There is a second pipe mother section on the top, and the two ends of the second pipe mother section are lapped on the post insulator and the radio interference filter capacitor, and the radio interference filter capacitor passes through the The converter transformer bushing fittings are connected to the converter transformer grid side bushing terminals provided on one side.

In the above technical solution: the first pipe female section and the second pipe female section are connected through movable pipe female section fittings.

In the above technical solution: the inside of the pipe female sectional fitting is made of multiple annealed copper wires or annealed aluminum wires.

In the above technical solution: the two ends of the converter transformer bushing fittings are made of multi-strand annealed copper wires or annealed aluminum conductors, and are respectively connected with the described converter transformer network side bushing terminals and the described The radio interference filter capacitor is flexibly connected; a pre-bent tube mother structure is adopted in the middle part of the converter transformer bushing fitting.

In the above technical solution: the converter transformer bushing hardware and the radio interference filter capacitor are hingedly connected.

In the above technical solution: the post insulator is located between the radio interference filter capacitor and the lightning arrester connection terminal.

The utility model has the following advantages: the utility model protects the bushing terminal on the grid side of the converter transformer, avoids accidents such as deformation and fracture of the bushing grid side terminal due to long-term bearing of large mechanical loads, and further improves the reliability of the UHV converter station. Operational reliability and stability.

Description of drawings

Figure 1 is an isometric view of the utility model.

Fig. 2 is the front view of the utility model.

Fig. 3 is a side view of the utility model.

Figure 4 is a top view of the utility model.

In the figure: converter transformer bushing fittings 1, tube mother section fittings 2, converter transformer grid side bushing terminals 3, radio interference filter capacitors 4, post insulators 5, lightning arrester terminals 6, down conductors 7, The upper jumper 8, the first bus section 9, the second bus section 10, and the tension insulator string 11.

detailed description

The implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation of the present utility model, and are only examples; simultaneously, the advantages of the present utility model will become clearer and easier to understand.

Referring to Fig. 1-4, the dedicated fitting structure for the grid side incoming line of the converter transformer is located on the firewall 12, which includes the converter transformer bushing fitting 1, the tube mother section fitting 2, and the converter transformer grid side bushing wiring Terminal 3, radio interference filter capacitor 4, post insulator 5, lightning arrester terminal 6, down conductor 7, upper jumper 8, first pipe mother section 9, second pipe mother section 10 and strain insulator string 11;

The two ends of the upper jumper 8 are fixed to the transmission tower through the tension insulator string 11, and the downlead 7 is set at the transition section between the upper jumper 8 and the tension insulator string 11, The down conductor 7 guides the current to the first pipe female section 9 .

The other end of the down-lead wire 7 is connected to the first pipe female section 9 arranged below, and the two ends of the first pipe female section 9 are lapped on the post insulator 5 and the lightning arrester connecting wire terminal 6. The second pipe mother section 10 is arranged on the same horizontal line as the first pipe mother section 9, and the two ends of the second pipe mother section 10 are lapped on the said post insulator 5 and the said radio interference filter On the capacitor 4 , the radio interference filter capacitor 4 is connected to the converter transformer grid-side bushing connection terminal 3 provided on one side through the converter transformer bushing hardware 1 .

The first pipe female section 9 and the second pipe female section 10 are connected by movable pipe female section fittings 2 .

The inside of the pipe-female sectional fitting 2 is made of multiple annealed copper wires or annealed aluminum wires to form a reliable electrical connection.

Both ends of the converter transformer bushing fitting 1 are made of multiple annealed copper wires or annealed aluminum wires to form a reliable electrical connection.

The converter transformer bushing fittings 1 are respectively movably connected to the converter transformer grid-side bushing terminals 3 and the radio interference filter capacitor 4; in the middle of the converter transformer bushing fittings 1 The pre-bent pipe female structure is used to effectively reduce the size of the metal fittings, and it has strong adaptability to the equalizing rings of the equipment at both ends of the fittings.

The converter transformer bushing hardware 1 is hingedly connected to the radio interference filter capacitor 4 .

When the converter transformer bushing fittings 1 and the pipe mother section fittings 2 are displaced greatly by the influence of external factors such as strong wind and ice covering on the upper cross-line 8 , the bushing terminal 3 on the grid side of the converter transformer There is no relative displacement and no mechanical load caused by it. Under earthquake conditions, each device is not fixedly connected, which can also effectively absorb the earthquake stress and protect the firm connection of the equipment terminals.

The post insulator 5 is located between the radio interference filter capacitor 4 and the arrester connection terminal 6 .

The parts not described in detail above are all prior art.

Claims (6)

1. the special hardware fitting structure of converter power transformer net side inlet wire, it is located on fire wall (12), it is characterised in that：It includes the change of current Bushing shell for transformer gold utensil (1), pipe mother partition gold utensil (2), converter power transformer network side sleeve binding post (3), radio interference filter Ripple device capacitor (4), support insulator (5), arrester binding post (6), downlead (7), upper strata cross-line (8), the first pipe are female Section (9), the second pipe parent segment (10) and strain insulator string (11)；

The both ends of described upper strata cross-line (8) are fixed by described strain insulator string (11) with power transmission tower, described upper strata Downlead (7) is set at the changeover portion of cross-line (8) and described strain insulator string (11), described downlead (7) it is another The the first pipe parent segment (9) set with lower section is held to be connected, the both ends of the first described pipe parent segment (9) are overlapped on support insulator (5) In arrester cable terminal (6), the second pipe parent segment is provided with the same horizontal line of the first described pipe parent segment (9) (10), the both ends of the second described pipe parent segment (10) are overlapped on described support insulator (5) and the filter of described radio interference On ripple device capacitor (4), described radio interference filter capacitor (4) passes through described converter transformer bushings gold utensil (1) the converter power transformer network side sleeve binding post (3) set with side is connected.

2. the special hardware fitting structure of converter power transformer net side inlet wire according to claim 1, it is characterised in that：Described first It is connected between pipe parent segment (9) and the second described pipe parent segment (10) by mobilizable pipe mother partition gold utensil (2).

3. the special hardware fitting structure of converter power transformer net side inlet wire according to claim 1 or 2, it is characterised in that：Described It is made inside pipe mother partition gold utensil (2) by multiply annealed copper wire or soft aluminum conductor.

4. the special hardware fitting structure of converter power transformer net side inlet wire according to claim 3, it is characterised in that：The described change of current Bushing shell for transformer gold utensil (1) both ends are made by multiply annealed copper wire or soft aluminum conductor, and respectively with described converter power transformer Network side sleeve binding post (3) and described radio interference filter capacitor (4) are flexibly connected；In described change of current transformation Pre- bend pipe parent structure is used in the middle part of device sleeve pipe gold utensil (1).

5. the special hardware fitting structure of converter power transformer net side inlet wire according to claim 4, it is characterised in that：The described change of current Bushing shell for transformer gold utensil (1) is used with described radio interference filter capacitor (4) and is articulated and connected.

6. the special hardware fitting structure of converter power transformer net side inlet wire according to claim 5, it is characterised in that：Described pillar Insulator (5) is between described radio interference filter capacitor (4) and described arrester binding post (6).