RU83365U1 - COMPLETE TRANSFORMER SUBSTATION - Google Patents

Abstract

A complete transformer substation comprising a case equipped with doors, two main power transformers, a high voltage device and a low voltage switchgear, characterized in that the substation further comprises a third standby transformer connected to the power supply and installed with the possibility of connecting to the load in case of failure of one of transformers, the station building is made in the form of a modular building and is a solid metal structure welded from three blocks July, two doors are made in each of the end walls, transformers are located opposite each of the three doors along the longitudinal side of the building, a high voltage device for each of the main transformers is located between the two main transformers so that it forms a single installation consisting of two sections, installed along the end wall of the modular building, and each of the two sections of low voltage is placed along the longitudinal side of the building so that the sections are placed opposite each other and are connected by bus is standby transformer is placed in a row with one of the main transformer and the low voltage section along the longitudinal side of the building, opposite the door in the opposite end wall of a building, and a high voltage transformer device to back is arranged along the opposite end wall.

Description

The utility model relates to objects of industrial construction and is intended for the reception, conversion and distribution of electrical energy.

A device of a complete transformer station is known (St. Utility Model No. 12292, class NO2B I / OO), comprising a building in the form of a module in which a power transformer is installed, as well as electrical equipment of high and medium voltage, which is closed by doors with locks.

Known transformer substation (patent for utility model No. 1595, class NO2B I / OO), consisting of separate functional, weatherproof transformer modules of full factory readiness, the electrical and auxiliary equipment inside which is fully assembled, adjusted and tested at the manufacturer , and are equipped with supporting and adjusting devices that allow them to be unloaded, moved and docked, as well as limiters to prevent the rollover of modules.

Known complete transformer substation of the closed type (certificate for utility model No. 2895, M.cl. Н02В 7 / OO), comprising a housing made of reinforced concrete, which houses a power transformer, high and low voltage switchgears and protective equipment .

The closest analogue (prototype) of the proposed device is a complete transformer substation - patent No. 43412 MPK7 Н02В 7/06 (option 2). The complete transformer station contains two enclosures with doors, two power transformers, a 6 (10) kV high voltage device and a 0.4 kV low voltage switchgear. Each housing is equipped with two internal partitions, dividing it into three compartments arranged in a row: a transformer compartment, in which the corresponding power transformer is located, a high-voltage compartment with the corresponding part of the high-voltage device and a low-voltage compartment with the corresponding part of the low-voltage switchgear, both cases made together, having a common side wall separating the transformer and high voltage compartments of the housings, and each of the compartments made having an external door.

Besides:

- all compartment doors are made on one of the end faces of each case,

- the high voltage device is located in the high voltage compartments along the common side wall of the buildings,

- the high voltage device is located in the high voltage compartments along the internal partitions of the buildings,

- the complete transformer substation is equipped with a reserve switching device installed in low-voltage compartments,

- in the low-voltage compartment, an auxiliary box is installed,

- low-voltage compartment compartments combined into one compartment,

- low-voltage compartments of two buildings are divided by a partition into two parts,

- each case is a frame structure sheathed with panels,

- each case is made insulated.

A disadvantage of the known complete transformer substation is the excessive bulkiness and mass of the known substation, as well as the complexity of its installation associated with the installation of individual compartments, the unreliability of the substation.

The objective of the utility model is the creation of a complete transformer substation with increased voltage, with reduced overall dimensions.

The technical result is to reduce the area occupied by the substation, increasing the reliability of the work.

This technical result is achieved by the fact that the complete transformer substation comprises a housing equipped with doors, two main power transformers, a high voltage input device and a low voltage switchgear, further comprises a third standby transformer connected to the power supply and installed with the ability to connect to the load when exiting building one of the main transformers, the case is made in the form of a modular building and is a solid welded metal console structure, two doors are made in each of the end walls, transformers are located opposite each of the three doors along the longitudinal side of the building, a high voltage device for each of the main transformers is located between the two main transformers, so that it forms a single installation consisting of two sections, installed along the end wall of the modular building, and each of the two sections of low voltage is placed along the longitudinal side of the building, so that the sections are placed opposite each other and connected by busbars th bridge standby transformer is placed in a row with one of the main transformer and the low voltage section along the longitudinal

the side of the building, opposite the door in the opposite end wall of the building, and the high voltage device for the backup transformer is located along this opposite end wall.

Figure 1 shows the inventive complete transformer substation, where 1, 2 - the main power transformers ,, 3 - standby transformer connected to power and installed with the ability to connect to the load when one of the transformers fails, the housing 9 is made in the form of a modular building and represents a solid metal structure welded from three blocks, two doors 10 are made in each of the end walls, transformers are located opposite each of the three doors along the longitudinal side of the building, at high voltage 4 for each of the main transformers is located between the two main transformers, so that it forms a single installation consisting of two sections, installed along the end wall of the modular building, and each of the two sections of low voltage 5, 6 is placed along the longitudinal side of the building , so that the sections are located opposite each other and are connected by a bus bridge 7, the backup transformer 3 is located in a row with one of the main transformers 2 and the low voltage section 6 along the longitudinal side Denmark, on the other hand the door to the opposite end wall of the building, and a high voltage device 4 for the backup transformer is located along the opposite end wall. 8 - removable cable duct. Thus, all equipment has a two-row arrangement, which is convenient for maintenance, ensures accessibility to all parts during installation, and safety during operation.

The electrical circuit of the inventive station is presented in figure 2, where:

QW1 - load switch of the first input of high voltage

QW2 - load switch of the second high voltage input

QW3 - load backup switch for high voltage input

FU1 - high voltage fuse for first input

FU2 - high voltage fuse for second input

FU3 - high voltage fuse for backup input

T1, T2 - main power transformers 6.10 / 0.4 kV

T3 backup transformer

QF1 - 0.4 kV first input circuit breaker,

QF2 - circuit breaker of the second input 0.4 kV,

QF3 - 0.4 kV backup input circuit breaker,

QF4, QF5 - sectional switches 0.4 kV,

QF6, QF7 - 0.4 kV outgoing circuit breakers

The scheme works as follows:

Each power transformer (T1, T2, T3) is protected by a high voltage input device, which is a metal case (cabinet), where a high-voltage load switch (W1, W2, W3) and a fuse (FU1, FU2, FU3) are connected in series. Load breakers are designed for switching the electric circuit, fuses protect against short circuits. In normal mode, all load switches are turned on, and, accordingly, all transformers are energized.

The 0.4 kV low voltage switchgear is a combination of metal cabinets with a busbar system installed in them, introductory circuit breakers QF1, QF2, QF3, sectional switches QF4, QF5, outgoing switches FQ16, FQ7.

The number of outgoing lines depends on the specific configuration requirements. In normal mode, the opening switches QF1, QF2, QF3 and the outgoing circuit breakers are turned on. In the event of damage to one of the main transformers (e.g. T1), its opening circuit breaker (QF1) automatically trips, then the QF4 section switch is immediately turned on. Thus, uninterrupted power supply to electricity consumers is ensured. After restoring the damaged transformer, the sectional switch (QF4) is turned off, and the input switch QF1 is turned on - the circuit returns to its original state.

Each transformer has its own independent power supply. The main transformers are connected to two busbar sections of the low voltage switchgear. A third standby transformer is located between the high and low voltage sections and can be connected to them if necessary. The substation can be produced as prepared as possible in the factory, therefore, with high quality installation. Small dimensions and weight make it possible to transport substations by any type of transport. Using the proposed technical solution allows you to realize a number of significant advantages over similar designs known today, namely:

- reduction in the area occupied by the substation,

- high reliability and absolute safety in operation;

- a high degree of readiness of the substation for inclusion,

- small dimensions and weight allow to transport substations by any type of transport;

- the ability to implement any circuit solutions for substations with a capacity of 100 to 2500 kV · A;

- New substations are distinguished by architectural expressiveness, a variety of finishes and color schemes.

Claims (1)

A complete transformer substation comprising a case equipped with doors, two main power transformers, a high voltage device and a low voltage switchgear, characterized in that the substation further comprises a third standby transformer connected to the power supply and installed with the possibility of connecting to the load in case of failure of one of transformers, the station building is made in the form of a modular building and is a solid metal structure welded from three blocks July, two doors are made in each of the end walls, transformers are located opposite each of the three doors along the longitudinal side of the building, a high voltage device for each of the main transformers is located between the two main transformers so that it forms a single installation consisting of two sections, installed along the end wall of the modular building, and each of the two sections of low voltage is placed along the longitudinal side of the building so that the sections are placed opposite each other and are connected by bus is standby transformer is placed in a row with one of the main transformer and the low voltage section along the longitudinal side of the building, opposite the door in the opposite end wall of a building, and a high voltage transformer device to back is arranged along the opposite end wall.