CN212676690U - Integrated transformer - Google Patents

Abstract

The utility model discloses an integration transformer, wherein, this integration transformer includes: the high-voltage working box is used for connecting high voltage electricity; the low-voltage working box is used for outputting low voltage electricity; the transformer box is electrically connected with the high-voltage working box and the low-voltage working box respectively and is used for reducing the high-voltage connected into the high-voltage working box into low-voltage; the casing, high-pressure work box, transformer case and low pressure work box adopt the mode of transversal arrangement to set up in the casing, have solved the high technical problem of operation complexity of transformer among the correlation technique.

Description

Integrated transformer

Technical Field

The utility model relates to a transformer field particularly, relates to an integration transformer.

Background

With the rapid development of power grids in China, the use of transformers is more and more popular. At present, a transformer, a drop-out fuse, a lightning arrester and a JP type comprehensive distribution box of 10kV are independently installed. The installation time is long, and the installation accuracy is not high, uses angle bar, cross arm, staple bolt, indisputable annex more, takes time and takes a lot of work, and operation maintenance work load is big, and drop-out insurance accident probability is big, and the pile head is damaged more after the operation for a long time, causes the distribution accident easily.

In view of the above problems, no effective solution has been proposed.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an integration transformer to solve the high technical problem of the operation complexity of transformer among the correlation technique at least.

According to the utility model discloses an aspect of the embodiment provides an integrated transformer, include: the high-voltage working box is used for connecting high voltage electricity; the low-voltage working box is used for outputting low voltage electricity; the transformer box is electrically connected with the high-voltage working box and the low-voltage working box respectively and is used for reducing the high-voltage connected into the high-voltage working box into low-voltage; the shell, high-pressure work box, transformer case and low pressure work box adopt the mode of transversal arrangement to set up in the shell.

Optionally, the shell is a shell of a full-sealing structure made of a 4mm cold-rolled steel plate; the transformer box is an oil-immersed transformer box, and a two-position load switch, three double-sensitive plug-in fuses and a transformer module are arranged in the transformer box, wherein the rated current of the two-position load switch is 315 amperes, the rated voltage is 12 kilovolts, the thermal stability current is 16 kilovolts, the dynamic stability current is 40 kilovolts, the rated current of the fuses is 140 amperes, the rated voltage is 12 kilovolts, and the rated short circuit breaking current is 2.5 kiloamperes; the high-voltage incoming line of the transformer box is connected with a cable of the high-voltage working box through an elbow-shaped cable head, a lightning arrester is arranged on the high-voltage incoming line, and an elbow-shaped sheath is arranged on a wiring end of the high-voltage incoming line; a temperature monitoring device is arranged in the transformer box and used for monitoring the temperature in the transformer box; the integrated transformer is provided with a copper grounding conductor, one end of the copper grounding conductor is connected with a grounding end on the integrated transformer, the other end of the copper grounding conductor is provided with at least two grounding terminals, the diameter of each grounding terminal is larger than 12 mm, and the cross-sectional area of each grounding terminal is not smaller than 30 square mm.

Adopt the utility model discloses an integration transformer owing to adopted the modular mode, can directly install corresponding module in the quick-witted case to change bad module, solved the high technical problem of operation complexity of transformer among the correlation technique.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic diagram of an integrated transformer according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of circuits or devices is not necessarily limited to those circuits or devices expressly listed, but may include other circuits or devices not expressly listed or inherent to such article or apparatus.

Fig. 1 is a schematic diagram of an integrated transformer according to an embodiment of the present invention, as shown in fig. 1, the integrated transformer includes:

a high-voltage working box 11 of a high-voltage component is arranged in the high-voltage working box, and the high-voltage working box is used for connecting high-voltage electricity (such as 10 KV).

A low voltage work box 13 in which low voltage components are installed, for outputting low voltage electricity (i.e., residential electricity, such as 220V).

The transformer box is internally provided with a transformer box 15 of a transformer component, the transformer box is respectively electrically connected with the high-voltage working box and the low-voltage working box, and the transformer box is used for reducing the high-voltage connected to the high-voltage working box into low-voltage power.

The casing 17, the high pressure work box the transformer case and the low pressure work box adopt the mode of transverse arrangement to set up in the casing.

The casing is a casing of a full-sealing structure made of 4mm cold-rolled steel sheets.

The transformer box is an oil-immersed transformer box, a two-position load switch, three double-sensitive plug-in fuses and a transformer module are arranged in the transformer box, wherein the rated current of the two-position load switch is 315 amperes, the rated voltage of the two-position load switch is 12 kilovolts, the thermal stability current of the two-position load switch is 16 kilovolts, the dynamic stability current of the two-position load switch is 40 kilovolts, the rated current of the two-position load switch is 140 amperes, the rated voltage of the two-position load switch is 12 kilovolts, and the rated short circuit on-off current of the two-position load switch.

The high-voltage incoming wire of the transformer box is connected with a cable of the high-voltage working box through an elbow-shaped cable head, a lightning arrester is installed on the high-voltage incoming wire, and an elbow-shaped sheath is installed on a wiring end of the high-voltage incoming wire.

The transformer box is internally provided with a temperature monitoring device, and the temperature monitoring device is used for monitoring the temperature in the transformer box.

The transformer is characterized in that a copper grounding conductor is arranged on the integrated transformer, one end of the copper grounding conductor is connected with a grounding end on the integrated transformer, at least two grounding terminals are arranged at the other end of the copper grounding conductor, the diameter of each grounding terminal is larger than 12 mm, and the cross-sectional area of each grounding terminal is not smaller than 30 square mm.

Adopt the utility model discloses an integration transformer has solved the great problem of integration transformer volume among the prior art.

The novel integrated transformer (10kV pole distribution transformer and 10kV distribution transformer) is suitable for wide city rural power grid areas of 200 kilovolt-ampere and lower pole distribution transformer areas, and is compatible with various electric pole standard schemes of 10 meters, 12 meters, 15 meters and the like corresponding to general design of the distribution transformer areas of national power grid companies. According to the load requirement, the transformers can be connected in parallel to realize four capacity combinations: 100 kilovolt-ampere, 200 kilovolt-ampere, 100 kilovolt-ampere +200 kilovolt-ampere, 200 kilovolt-ampere +200 kilovolt-ampere, cover most rural power grid requirements.

The technical parameters of the transformer comprise: rated voltage: 10kV ± 2.5%/0.4 kV or 0.23 kV; rated frequency: 50Hz, the voltage waveform of the power supply is similar to a sine wave, and the voltage of the three-phase power supply is approximately symmetrical; and (3) connecting the groups: dyn 11; rated capacity: 200 kVA; winding resistance unbalance rate: the interphase is less than or equal to 4 percent, and the interline is less than or equal to 2 percent; insulation level: power frequency withstand voltage for 1 minute: 35 kV; and (3) lightning impulse withstand voltage: full wave 75kV, chopper 85 kV; coil and conductor materials: copper; short-circuit impedance: 4.0 +/-10% (main tapping) and 4.0 +/-15% (other tapping); limiting value of winding temperature rise: 65K or less, and the limit value of temperature rise of the top layer: less than or equal to 60K; noise level: less than or equal to 55 dB; protection grade: IP 33; a cooling mode: oil immersion self cooling (ONAN); a pressure release device: action value of 10psig (0.68 atm); load loss: less than or equal to 1580+ 15% W and less than or equal to 2730+ 15% W; no-load loss: not more than 150+ 15% W, not more than 240+ 15% W; no-load current: less than or equal to 1.3+ 30% and less than or equal to 1.3+ 30%; high-pressure side inlet wire mode: high-voltage insulated cable YJV22-10kV-3 × 25mm²(ii) a The high-voltage side cable inlet and outlet structure form: fully insulating and fully shielding; the full-insulation and full-shielding high-voltage cable accessory: rated current 200A.

The insulation level of the transformer complies with the specifications of table 1 below:

TABLE 1

Rated voltage kV	10.5
		Short-time power frequency withstand voltage kV	35
Lightning impulse withstand voltage kV	75

The insulation level of the high-voltage electrical equipment complies with the specifications of table 2 below:

TABLE 2

The insulation level of the low-voltage electrical equipment complies with the specifications of table 3 below:

TABLE 3

Rated voltage V	380
		Short-time power frequency withstand voltage V	3000

The unbalance rate of the transformer winding resistance is not more than 4% between phases and not more than 2% between lines; transformer noise level, the maximum noise level measured at 1/2 at the tank height is less than 55dB when the transformer is running continuously at full load; the ability of the platform area to withstand short circuits; the heat resistance of the transformer area to short circuit, and the transformer running at any tapping position, can bear the external short circuit current 2s fed by the 20KA system without damage or displacement. In a transformer in full load operation, the winding temperature does not exceed 250 ℃ (copper) after short-circuit fault. The transformer can bear the dynamic stability of short circuit, and can bear the short-circuit current with the constant short-circuit capacity of 500MVA without damage or displacement when the transformer runs at any tapping position. The novel integrated transformer comprises a high-voltage working box, a transformer box and a low-voltage working box which are combined into a whole, and is transversely arranged. A box shell: the case casing adopts metal casing, has anti insolate, is difficult for heat conduction, and anti efflorescence, characteristics such as anti mechanical shock promptly: 4mm high-quality cold-rolled steel plates are adopted, so that the appearance is smooth and attractive; the box body is in a full-sealing structure.

Tap switch and load switch operation mode: and (4) manually operating. Load switch YZF1I-315/10, two-position load switch, rated current: 315A, rated voltage: 12kV, 2S thermally stable current: 16KA, dynamic stabilization current: 40 KA: 10kV fuse PRNT-15.5; 3 double-sensitive plug-in fuses are adopted, the rated current of a fuse base is 140A, and the rated voltage is as follows: 12 kV; the rated short circuit breaking current is 2.5kA, and the rated short circuit breaking current is used for overload and short circuit protection of the system. The high-voltage side adopts a combination of a two-position load switch and a fuse, and the power transformation module, the load switch and the fuse are all sealed in the oil tank body. The high-voltage incoming line is connected with a cable through an elbow-shaped cable head, can be cut off under the voltage of 10kV, and is closed to load current of 200A, and a lightning arrester is arranged on the high-voltage incoming line; and the inlet end of the high-voltage cable is also provided with an elbow-shaped sheath, so that the high-voltage cable has the functions of maintenance free, water resistance, touch electrification, electrification plug and the like. All the electric appliance element devices in the high-voltage working box are convenient to operate and maintain, and the connecting lines of the electric appliance element devices are provided with obvious phase marks.

The high-voltage working box is provided with a high-voltage live display device convenient to observe, and the selection and connection mode of the connection section of the electrical equipment meets the requirements of current-carrying capacity and short-time current tolerance. The fixed mode is to meet the requirement of peak current tolerance, and the connecting lines have obvious phase marks. The section of the zero bus is larger than 1/2 of the section of the main bus, and if the section of the main bus is smaller than 2 mm, the same section is taken. And the requirement of reactive compensation is that an intelligent capacitor is adopted for full-automatic tracking compensation. The voltage is switched at zero passage, and no switching-on surge current and no operation overvoltage exist. The compensation effect can reach 0.95 without over compensation. And performing multi-level switching according to the capacity of the capacitor. Complete protection and strong automatic operation function. The compensation capacity is 25% of the transformer capacity, and three-phase common compensation and sub compensation and fixed compensation and dynamic compensation are combined.

The temperature of novel integration transformer, temperature monitoring device are installed to the transformer to the top layer oil temperature of monitoring oil-immersed transformer. The grounding is provided with a special copper grounding conductor, at least two fixed terminals connected with a grounding net are arranged on the copper grounding conductor, and an obvious grounding mark is arranged on the copper grounding conductor. The bolt used for the grounding terminal is a copper bolt with the diameter not less than M12. The current density of the grounding conductor does not exceed 200A/mm2, and the section of the grounding conductor is not smaller than 30mm2 at least. The individual copper ground conductors of the individual tank compartments are interconnected or securely connected together by individual terminals. The grounding of the door and the drawable part under the normal operation condition ensures that the non-charged metal exposed parts of all high-voltage and low-voltage electrical equipment in the transformer are reliably grounded, and the door and the drawable part are still reliably grounded when the door and the drawable part are opened and drawn out. The portion connected to the ground return includes: the novel integrated transformer comprises a shell of a novel integrated transformer, a cabinet body or a frame of high-voltage electrical equipment, a high-voltage metal shield, a grounding conductor of a high-voltage cable, a shell of the transformer, a frame of low-voltage electrical equipment and a grounding connecting line of automatic control and remote control equipment.

Electric energy metering device, novel integrated transformer reserve gauge table meter mounted position. And (4) carrying out heat shrinkage on the busbar, and carrying out tin coating treatment on the lap joint part. The low-voltage leakage protector has an automatic reclosing function. And is mounted on a cement electric pole.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The utility model discloses each subassembly that will protect all is the entity product that has definite shape, structure and occupy certain space, like high-pressure work box etc. all be can the independent operation, have concrete hardware structure's computer equipment, terminal or server.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (2)

1. An integrated transformer, comprising:

the high-voltage working box is used for connecting high voltage electricity;

the low-voltage working box is used for outputting low voltage electricity;

the transformer box is electrically connected with the high-voltage working box and the low-voltage working box respectively and is used for reducing the high-voltage connected to the high-voltage working box into low-voltage;

the casing, the high pressure work box the transformer case and the low pressure work box adopt the mode of transverse arrangement set up in the casing.

2. The integrated transformer of claim 1,

the shell is a shell of a full-sealing structure made of a 4mm cold-rolled steel plate;

the transformer box is an oil-immersed transformer box, a two-position load switch, three double-sensitive plug-in fuses and a transformer module are arranged in the transformer box, wherein the rated current of the two-position load switch is 315 amperes, the rated voltage is 12 kilovolts, the thermal stability current is 16 kilovolts, the dynamic stability current is 40 kilovolts, the rated current of the fuses is 140 amperes, the rated voltage is 12 kilovolts, and the rated short circuit breaking current is 2.5 kilovolts;

the high-voltage incoming line of the transformer box is connected with a cable of the high-voltage working box through an elbow-shaped cable head, a lightning arrester is arranged on the high-voltage incoming line, and an elbow-shaped sheath is arranged on a wiring end of the high-voltage incoming line;

a temperature monitoring device is arranged in the power transformation box and used for monitoring the temperature in the power transformation box;

the transformer is characterized in that a copper grounding conductor is arranged on the integrated transformer, one end of the copper grounding conductor is connected with a grounding end on the integrated transformer, at least two grounding terminals are arranged at the other end of the copper grounding conductor, the diameter of each grounding terminal is larger than 12 mm, and the cross-sectional area of each grounding terminal is not smaller than 30 square mm.

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