CN204179544U - A kind of 35kV box-type substation used for wind power generation - Google Patents

Abstract

A box-type substation for 35kV wind power generation, comprising: a box body; a high-voltage room with a high-voltage arrester and a high-voltage live display device inside; a high-voltage operation room with a temperature controller and a power transformer inside; a low-voltage operation room with a There is a low-voltage switch cabinet; a step-up transformer oil tank, which is equipped with a step-up transformer, a high-voltage load switch and a high-voltage tap changer; a high-voltage wiring bushing, one end is connected to a high-voltage live display device, and the other end is connected to a high-voltage load switch; low-voltage wiring Bushing, one end is connected to the low-voltage switchgear, and the other end is connected to the low-voltage side of the step-up transformer; the high-voltage current-limiting fuse is connected to the circuit breaker of the low-voltage switchgear through the action output contact; the oil storage tank is connected to the oil tank of the step-up transformer , the pipeline is provided with a gas relay. The box-type substation has a more compact structure and a more reasonable layout, reduces the volume of equipment, reduces equipment cost, and improves the safety performance of equipment.

Description

A box-type substation for 35kV wind power generation

technical field

The utility model belongs to the field of development and manufacture of power transformers and the field of development and utilization of new energy, in particular to a box-type substation for 35kV wind power generation.

Background technique

The special box-type substation for wind power generation is a special booster equipment for wind farms. The function of the special box-type substation for wind power generation is to boost the power generated by the wind turbine and transmit it to the power grid. The box-type substation for wind power generation is pre-manufactured and assembled in the factory, mainly including step-up transformers, oil-immersed high-voltage load switches, high-voltage current-limiting fuses, low-voltage circuit breakers, power transformers and other auxiliary equipment.

At present, the traditional box-type substations in China mainly have the following technical problems:

1. The high-voltage current-limiting fuse is installed above the step-up transformer, which is easily affected by the temperature rise of the step-up transformer, and the high-voltage current-limiting fuse is blown non-accidentally, resulting in a power outage in the box-type substation.

2. There is no interlocking mechanism between the high-voltage current-limiting fuse and the low-voltage circuit breaker. After the high-voltage current-limiting fuse is blown, the step-up transformer is in a state of lack of phase operation, which endangers the operation safety of the box-type substation.

3. The high and low voltage bushings of the step-up transformer are oil-immersed porcelain bushings, which are prone to oil leakage under the action of the gravity of the cable connection and the gravity of the bushing itself.

4. The traditional box-type substation has no oil storage tank, cannot install gas relays, and cannot provide early warning and action protection for the gas generated by the step-up transformer. Due to the expansion of the radiator during the operation of the box-type substation without oil conservator, the oil level drops and the transformer oil cannot be replenished in time, which endangers the operation safety of the box-type substation.

5. Wind farms are usually built in desert areas, where wind, sand, rain and snow are very heavy all the year round. It is difficult for traditional box-type substations to effectively prevent the entry of wind, sand, rain and snow, which endangers the operation safety of box-type substations.

Utility model content

In order to solve the above existing problems, the purpose of this utility model is to provide a box-type substation for 35kV wind power generation. The box-type substation has a more compact structure and a more reasonable layout, reduces the volume of equipment, reduces equipment costs, and improves equipment safety. performance.

In order to achieve the above object, the technical scheme of the utility model is:

A box-type substation for 35kV wind power generation, comprising: a box body; a high-voltage chamber arranged on one side of the box body, and a high-voltage lightning arrester and a high-voltage live display device are arranged inside it; a high-voltage operation room is arranged on the other side of the box body The front part of one side is equipped with a temperature controller and a power transformer inside; the low-voltage operation room is arranged at the front part of the other side of the box body, arranged side by side with the high-voltage operation room, and the inside of the low-voltage operation room is provided with A low-voltage switchgear, the low-voltage switchgear is provided with a circuit breaker; a step-up transformer oil tank is arranged at the rear of the other side of the box, and a step-up transformer, a high-voltage load switch and a high-voltage tap changer are arranged in it; the high-voltage wiring Bushing, set on the tank wall of the step-up transformer oil tank on one side of the high-voltage chamber, one end of which is connected to the high-voltage live display device of the high-voltage chamber, and the other end is connected to the high-voltage load switch of the step-up transformer oil tank; low-voltage wiring The bushing is set on the tank wall of the step-up transformer oil tank on one side of the low-voltage operation room, one end of which is connected to the low-voltage switchgear of the low-voltage operation room, and the other end is connected to the low-voltage side of the step-up transformer oil tank of the step-up transformer The high-voltage current-limiting fuse is connected, and it is arranged on the tank wall of the step-up transformer oil tank located on one side of the high-voltage operating room. The high-voltage current-limiting fuse is provided with an action output contact, and the high-voltage current-limiting fuse passes through The action output contact is connected to the circuit breaker of the low-voltage switchgear; an oil conservator communicates with the upper part of the step-up transformer oil tank through a pipeline, and the pipeline between the oil conservator and the step-up transformer oil tank is provided with a gas relay.

Further, a door and a door frame are provided on the surface of the box, and a seal is provided between the door and the door frame.

In addition, the sealing member includes a strip-shaped sealing strip arranged in the groove of the door frame and a circular sealing strip arranged at the edge of the door frame.

In addition, a pressure release valve is provided on the surface of the booster transformer oil tank.

Furthermore, the step-up transformer oil tank is a corrugated oil tank.

Furthermore, the high-voltage wiring bushing is a resin-cast dry-type high-voltage bushing, which is installed with a flange between the step-up transformer oil tank wall.

Moreover, the high-voltage current-limiting fuse is arranged on the side of the step-up transformer.

Preferably, the high-voltage current-limiting fuse is a plug-in fuse for full-range transformer protection.

Furthermore, the oil conservator is a capsule oil conservator.

Furthermore, the low-voltage wiring bushing adopts a dry-type low-voltage bushing for an American-style box transformer, and is installed with a flange between it and the oil tank wall of the step-up transformer.

The beneficial effects of the utility model are:

1) The high-voltage wiring bushing is installed on the wall of the fuel tank in the high-pressure chamber. It is made of resin-cast dry-type high-voltage bushing and installed with a flange to effectively avoid oil leakage accidents.

2) The low-voltage wiring bushing is installed on the wall of the oil tank in the low-voltage operating room, and the dry-type low-voltage bushing for the American-style box transformer is installed with a flange to effectively avoid oil leakage accidents.

3) The high-voltage current-limiting fuse is installed on the wall of the oil tank in the high-voltage operating room, arranged up and down on the right side of the step-up transformer, to avoid being affected by the temperature rise of the step-up transformer oil top layer.

4) The high-voltage current-limiting fuse adopts a plug-in fuse for full-range transformer protection. The high-voltage current-limiting fuse has a fuse action output contact, which is connected to the low-voltage circuit breaker and trips when the high-voltage current-limiting fuse is blown. The low-voltage circuit breaker cuts off the incoming power supply and protects the step-up transformer.

5) Installing a capsule oil conservator on the oil tank of the step-up transformer can not only effectively prevent the transformer oil from directly contacting the air, but also solve the problem that the gas relay cannot be installed, and replenish the transformer oil in time.

6) In order to prevent wind, sand, rain and snow from entering the box-type substation, the shell of the utility model is made of hot-dip galvanized sheet, with a fully sealed structure, the protection level is designed according to IP54, and the door seal adopts a double-sealed structure.

7) The structure is more compact, the layout is more reasonable, the volume of the equipment is reduced, the cost of the equipment is reduced, and the safety performance of the equipment is improved.

Description of drawings

Fig. 1 is the structural schematic front view of the example of the present utility model.

Fig. 2 is a schematic top view of the structure of an example of the utility model.

Fig. 3 is a schematic side view of the structure of an example of the utility model.

Fig. 4 is a schematic diagram of a door double sealing structure of an example of the present invention.

Detailed ways

Referring to Figures 1 to 4, a box-type substation for 35kV wind power generation according to the present invention includes: a box body 23; A high-voltage charged display device 9; a high-voltage operation room 2 is arranged at the front of the other side of the box body 23, and a temperature controller 3 and a power transformer 4 are arranged inside it; a low-voltage operation room 5 is arranged at the box body 23 The front part on the other side is arranged side by side with the high-voltage operating room 2, and the low-voltage operating room 5 is provided with a low-voltage switchgear 6, and the low-voltage switchgear 6 is provided with a circuit breaker (not shown, the same below) ); the step-up transformer oil tank 8 is arranged at the rear part of the other side of the box body 23, in which a step-up transformer 15, a high-voltage load switch 12 and a high-voltage tap changer 14 are arranged; a high-voltage wiring bushing 10 is arranged at The step-up transformer oil tank 8 is located on the tank wall (not shown, the same below) on one side of the high-voltage chamber 1, one end of which is connected to the high-voltage charged display device 9 of the high-voltage chamber 1, and the other end is connected to the step-up transformer oil tank 8 high-voltage load switch 12 connected; low-voltage wiring bushing 16, set on the tank wall of the step-up transformer oil tank 8 on one side of the low-voltage operating room 5, one end of which is connected to the low-voltage operating room 5 and low-voltage switchgear 6, and the other One end is connected to the step-up transformer oil tank 8 and the low-voltage side of the step-up transformer 15 (not shown, the same below); the high-voltage current-limiting fuse connection 13 is set on the side of the step-up transformer oil tank 8 located on the side of the high-voltage operating room 2 On the box wall, the high-voltage current-limiting fuse 13 is provided with an action output contact (not shown, the same below), and the high-voltage current-limiting fuse 13 is connected to the low-voltage switch cabinet 6 circuit breaker through the action output contact. Connection; an oil conservator 18 communicates with the upper part of the step-up transformer oil tank 8 through a pipeline (not shown, the same below), and the pipeline between the oil conservator 18 and the step-up transformer oil tank 8 is provided with gas Relay 17.

Further, a door 21 and a door frame 19 are provided on the surface of the box body 23 , and a seal is provided between the door 21 and the door frame 19 .

In addition, the seal includes a strip-shaped sealing strip 20 disposed in the groove of the door frame 19 and a circular sealing strip 22 disposed on the edge of the door frame 19 .

In addition, a pressure release valve 7 is provided on the surface of the step-up transformer oil tank 8 .

Furthermore, the step-up transformer oil tank 8 is a corrugated oil tank.

Furthermore, the high-voltage wiring bushing 10 is a resin-cast dry-type high-voltage bushing, which is installed with a flange between the step-up transformer oil tank 8 and the tank wall.

Moreover, the high-voltage current-limiting fuse 13 is arranged on the side of the step-up transformer 15 .

Preferably, the high-voltage current-limiting fuse 13 is a plug-in full-range transformer protection fuse.

Furthermore, the oil conservator 18 is a capsule oil conservator.

Furthermore, the low-voltage wiring bushing 16 adopts a dry-type low-voltage bushing for an American box transformer, and is installed with a flange between it and the tank wall of the step-up transformer oil tank 8 .

The 35kV box-type substation for wind power generation described in the utility model is prefabricated as a whole in the factory, installed in the 35kV wind farm, and the 0.69kV electric energy emitted by the wind generator passes through the low-voltage switchgear 6 and the low-voltage wiring sleeve of the utility model. The tube 16 is input to the low-voltage side of the step-up transformer 15, and 35kV electric energy is output through the step-up transformer 15. The 35kV electric energy passes through the high-voltage current-limiting fuse 13, the high-voltage load switch 12, and the high-voltage wiring bushing 10, and finally connects it through the high-voltage cable. 110kV booster station.

The utility model includes a high-voltage chamber 1, a high-voltage operating chamber 2, a low-voltage operating chamber 5, and a step-up transformer oil tank 8, which are arranged in the shape of a character, in which a high-voltage arrester 11, a high-voltage electrified display device 9 and other equipment are installed in the high-voltage chamber 1, and are arranged in The left side of the box-type substation; step-up transformer 15, high-voltage current-limiting fuse 13, high-voltage load switch 12, high-voltage tap changer 14 and other equipment are installed in the booster transformer oil tank 8, and are arranged on the right rear side of the box-type substation; Power transformer 4, temperature controller 3 and other equipment are installed in operating room 2; low-voltage switchgear 6 is installed in low-voltage operating room 5, and high-voltage operating room 2 and low-voltage operating room 2 are arranged in the right front of the box-type substation.

The high-voltage wiring bushing 10 is installed on the wall of the step-up transformer oil tank 8 in the high-voltage chamber 1. It adopts a resin-cast dry-type high-voltage bushing, and the horizontal outlet is installed with a flange to effectively avoid oil leakage accidents.

The low-voltage wiring bushing 16 is installed on the wall of the step-up transformer oil tank 8 in the low-voltage operating room 5. It adopts a dry-type low-voltage bushing dedicated to an American box transformer, and the horizontal outlet is installed with a flange to effectively avoid oil leakage accidents.

The high-voltage current-limiting fuse 13 is installed on the step-up transformer oil tank 8 case walls in the high-voltage operating room 2, and is arranged on the right side of the step-up transformer 15 according to the upper and lower arrangement, so as to avoid being affected by the temperature rise of the step-up transformer 15 oil top layers.

The high-voltage current-limiting fuse 13 adopts a plug-in type full-range transformer protection fuse, and the high-voltage current-limiting fuse has a fuse action output contact, which is connected to the circuit breaker in the low-voltage switch cabinet 6. When the high-voltage current-limiting fuse When 13 fuses, jump off the circuit breaker in the low-voltage switch cabinet 6, cut off the incoming power supply, and protect the step-up transformer 15.

Installing the capsule oil conservator 18 on the step-up transformer oil tank 8 can effectively prevent the transformer oil from directly contacting the air, solve the problem that the gas relay 17 cannot be installed, and replenish transformer oil in time.

As shown in Figure 4, in order to better adapt to the harsh operation of the wind farm and prevent the entry of objects such as wind, sand, rain and snow, the utility model adopts a double sealing structure. Strip seal 20 and circular seal 22 are installed on door frame 19 of the present utility model, and door 21 is compressed on strip seal 20 and circular seal 22 after closing the door, forms double sealing. The strip-shaped sealing strip 20 is the first seal, which can block the entry of most wind and sand, rain and snow, and the remaining few wind and sand, rain and snow are completely blocked by the circular sealing strip 22, which is the second Road seal. Through the double sealing structure, objects such as wind, sand, rain and snow can be effectively prevented from entering the interior of the utility model, greatly improving the operation safety of the utility model, reducing the maintenance workload of the equipment, and saving operation and maintenance costs.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the utility model has been described in detail with reference to the preferred embodiment, those skilled in the art should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the scope of the technical solution of the utility model. Included in the scope of the claims of the present utility model.

Claims (10)

1. a 35kV box-type substation used for wind power generation, is characterized in that, comprising:

Casing;

Hyperbaric chamber, is arranged at side in described casing, and its inside is provided with high-voltage arrester and high voltage display device;

Operation with high pressure room, be arranged at opposite side in described casing anterior, its inside is provided with temperature controller and power transformer;

Low voltage operated room, be arranged at opposite side in described casing anterior, with described operation with high pressure room laid out in parallel, described low voltage operated chamber interior is provided with low-tension switch cabinet, and described low tension switch is provided with circuit breaker cashier's office in a shop;

Step-up transformer fuel tank, is arranged at opposite side rear portion in described casing, is provided with step-up transformer, high voltage load switch and high-voltage tap changer in it;

High-voltage connection sleeve pipe, be arranged at described step-up transformer fuel tank and be positioned on the tank wall of side, hyperbaric chamber, its one end is connected with described hyperbaric chamber high voltage display device, and the other end is connected with described step-up transformer fuel tank high voltage load switch;

Low pressure connecting sleeve, is arranged at described step-up transformer fuel tank and is positioned on the tank wall of side, low voltage operated room, and its one end is connected with described low voltage operated room low-tension switch cabinet, and the other end is connected with described step-up transformer fuel tank step-up transformer low voltage side;

High-voltage and current-limitation fuse, being arranged at described step-up transformer fuel tank is positioned on the tank wall of side, operation with high pressure room, described high-voltage and current-limitation fuse is provided with action output contact, described high-voltage and current-limitation fuse is connected with described low tension switch cabinet breaker by action output contact;

One oil conservator, is communicated with above described step-up transformer fuel tank by pipeline, the pipeline between described oil conservator and step-up transformer fuel tank is provided with Buchholz relay.

2. a kind of 35kV according to claim 1 box-type substation used for wind power generation, it is characterized in that, described tank surface is provided with door and doorframe, is provided with seal between described door and doorframe.

3. a kind of 35kV according to claim 2 box-type substation used for wind power generation, is characterized in that, described seal comprises the circular seal bar at the bar shaped sealing strip be arranged in doorframe groove and the edge being arranged at doorframe.

4. a kind of 35kV according to claim 1 box-type substation used for wind power generation, is characterized in that, described step-up transformer tank surface is provided with pressure relief valve.

5. a kind of 35kV box-type substation used for wind power generation according to claim 1 or 4, is characterized in that, described step-up transformer fuel tank is corrugated tank.

6. a kind of 35kV according to claim 1 box-type substation used for wind power generation, is characterized in that, described high-voltage connection sleeve pipe adopts resin casting dry-type bushing, for flange is installed between itself and described step-up transformer fuel tank tank wall.

7. a kind of 35kV according to claim 1 box-type substation used for wind power generation, is characterized in that, described high-voltage and current-limitation fuse is arranged at described step-up transformer side.

8. a kind of 35kV box-type substation used for wind power generation according to claim 1 or 7, is characterized in that, described high-voltage and current-limitation fuse is plug-in type gamut tranformer protection fuse.

9. a kind of 35kV according to claim 1 box-type substation used for wind power generation, is characterized in that, described oil conservator is capsule type oil storage cabinet.

10. a kind of 35kV according to claim 1 box-type substation used for wind power generation, is characterized in that, described low pressure connecting sleeve adopts American Unit Substation dry type low-tension bushing, for flange is installed between itself and described step-up transformer fuel tank tank wall.