CN216250318U - Novel environment-friendly gas-insulated distribution transformer - Google Patents
Novel environment-friendly gas-insulated distribution transformer Download PDFInfo
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- CN216250318U CN216250318U CN202122579571.3U CN202122579571U CN216250318U CN 216250318 U CN216250318 U CN 216250318U CN 202122579571 U CN202122579571 U CN 202122579571U CN 216250318 U CN216250318 U CN 216250318U
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Abstract
The utility model relates to a novel environment-friendly gas-insulated distribution transformer, and belongs to the technical field of transformers. The technical scheme is as follows: the low-voltage coil (3) is wound by adopting a copper foil or polyester film winding wire layer type, and the high-voltage coil (8) is wound by adopting a polyester film winding wire layer type;a low-voltage coil head end outgoing line (2), a low-voltage coil tail end outgoing line (5) and a high-voltage coil head end outgoing line (7) are all axially led out from the upper end of the coil through the body; a high-voltage terminal tap lead (10) is led out from the outer side surface of the coil; the main insulation (6) adopts a structure that a paper tube and a stay divide an air gap. The utility model can be more suitable for the fire prevention and explosion prevention of the urban transformer substation, has higher safety performance and power distribution efficiency, simultaneously reduces the greenhouse effect of gas, is more environment-friendly, and has the characteristics of fire prevention, explosion prevention and high safety performance, and also has perfluoroisobutyronitrile (C) in the transformer4F7N) low greenhouse effect of the gas and basically no influence on the environment.
Description
Technical Field
The utility model relates to a novel environment-friendly gas-insulated distribution transformer, and belongs to the technical field of transformers.
Background
At present, in the field of gas-insulated transformers, a few manufacturers capable of producing gas-insulated transformers are available, and the produced gas-insulated transformers are all made of SF6The gas acts as an insulating and cooling medium. With the continuous accumulation of greenhouse effect, the situation of global warming is more and more serious, and SF6Although the gas is nontoxic and harmless to human bodies, the gas is a serious greenhouse effect gas, and the single-molecule greenhouse effect of the gas is 2.2 ten thousand times that of carbon dioxide. The Paris protocol and the Kyoto protocol both put restrictions on the reduction of greenhouse gases, wherein SF is explicitly proposed in the Kyoto protocol6The gas is one of 6 greenhouse gases prohibited from being emitted. In view of the above, a substitute for the current SF by a less greenhouse effect, more environmentally friendly gas is sought6Gas has been urgently used as an insulating and cooling medium of a gas-insulated transformer, thereby greatly reducing the influence of the gas-insulated transformer on the environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel environment-friendly gas-insulated distribution transformer which adopts perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) Mixed environment-friendly gas as gas-insulated transformerInsulating and cooling medium to optimize transformer structure, more adapt to the fire prevention explosion-proof of urban substation, security performance and distribution efficiency are higher, reduce gaseous greenhouse effect simultaneously, and the type is more friendly to the environment, solves the above-mentioned technical problem that prior art exists.
The technical scheme of the utility model is as follows:
a novel environment-friendly gas-insulated distribution transformer comprises a transformer body, a main insulator, a gas tank, low-voltage and low-voltage neutral point sleeves, a non-excitation voltage regulating switch and a high-voltage sleeve, wherein the transformer body comprises an iron core, a coil and a lead, the coil comprises a low-voltage coil and a high-voltage coil which are sleeved, and the lead comprises a low-voltage coil head end lead wire, a low-voltage coil tail end lead wire, a high-voltage coil head end lead wire and a high-voltage tail end tap lead wire; the low-voltage coil is wound by a copper foil or polyester film winding wire layer type, and the high-voltage coil is wound by a polyester film winding wire layer type; the low-voltage coil head end outgoing line, the low-voltage coil tail end outgoing line and the high-voltage coil head end outgoing line are all axially led out from the upper end of the coil through the transformer body; a high-voltage tail end tap lead-out wire is led out from the outer side surface of the coil; the main insulation adopts a structure that a paper tube and a stay divide an air gap; the transformer is composed of A, B, C three-phase bodies, the bodies are placed in an air box, the internal insulation and cooling medium of the transformer is perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) Mixing the gas; the winding is connected with a low-voltage neutral point sleeve and a low-voltage neutral point sleeve on the gas tank, a non-excitation voltage regulating switch and a high-voltage sleeve through an internal lead, so that the functions of high-voltage and low-voltage leading-out and non-excitation voltage regulating of the three-phase transformer are realized.
And the gas tank is also provided with a finned radiator, a gas pressure gauge and a gas thermometer. The dissipation of heat generated by internal loss during the operation of the transformer is realized through the finned radiator; the low voltage of the transformer is connected with external low-voltage electric equipment through low-voltage and low-voltage neutral point sleeves; the high voltage of the transformer is connected with external high-voltage equipment through a high-voltage bushing; the switching of the tapping position in the transformer is realized through the non-excitation voltage regulating switch; the gas pressure gauge and the gas thermometer realize the monitoring of the gas pressure inside the transformer and the gas temperature at the top layer, and can send out alarm and trip signals when necessary so as to ensure the normal operation of the transformer.
The interior of the finned radiator is communicated with the gas in the transformer gas tank.
The gas tank is a metal shell and is filled with perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) And (4) mixing the gases.
The assembly method of the utility model comprises the following steps:
the transformer internal insulation and cooling medium adopts perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) Mixing the gas; the coil comprises a low-voltage coil and a high-voltage coil which are sleeved, the low-voltage coil is wound by a copper foil or polyester film winding wire layer type, and the high-voltage coil is wound by the polyester film winding wire layer type; the low-voltage coil head end outgoing line, the low-voltage coil tail end outgoing line and the high-voltage coil head end outgoing line are all axially led out from the upper end of the coil through the transformer body; a high-voltage tail end tap lead-out wire is led out from the outer side surface of the coil; the main insulation of the transformer adopts a structure that a paper tube and a stay divide an air gap; the transformer body of the three-phase transformer is formed by combining A, B, C three-phase transformer bodies and is placed in the air box; the high-voltage tail end tapping lead of the coil, the non-excitation voltage regulating switch and the high-voltage bushing are effectively connected through the lead; the secondary protection of the transformer is realized through a gas pressure gauge and a gas thermometer; the dissipation of heat generated by internal loss during the operation of the transformer is realized through the finned radiator.
The gas tank is designed and manufactured by adopting the standard of a pressure container, the strength of the environment-friendly gas-insulated transformer and the leakage rate of the environment-friendly gas in the environment-friendly gas-insulated transformer are ensured not to exceed 0.5 percent, the metal shell is filled with perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) The gas-insulated transformer manufactured by the mixed gas is a non-combustible, non-explosive, non-leakage and maintenance-free device, and meanwhile, the gas is degradable gas and not greenhouse effect gas, has no influence on the environment, and is more suitable for being used in places with high requirements on safety level in urban population concentration.
The low-voltage coil of the transformer is wound by adopting a copper foil or polyester film winding wire layer type, the high-voltage coil is wound by adopting a polyester film winding wire layer type, the process performance is excellent, the actual operability in the manufacturing process is improved, the quality of the transformer can be better ensured, and meanwhile, the insulating part in contact with the heating part of the conductor of the transformer coil is a heat-resistant insulating part with the E level or above, so that the ageing resistance of the transformer is ensured.
The low-voltage coil head end outgoing line, the low-voltage coil tail end outgoing line and the high-voltage coil head end outgoing line are axially led out from the upper end of the coil through the transformer body; the high-voltage tail end tap lead-out wire is led out from the side surface of the coil, so that the outgoing position of the transformer coil is optimized, the operability of lead connection is improved, and field wiring is facilitated.
The transformer main insulation adopts a structure that a paper tube and a stay bar are used for dividing an air gap, so that the main insulation strength between high-voltage and low-voltage coils of the transformer is improved. The adjustment of each tapping voltage of the high voltage of the transformer is realized through the effective connection of the tapping outlet at the high voltage end of the coil, the non-excitation voltage regulating switch and the high voltage bushing. The non-excitation voltage regulating switch ensures that the voltage can be regulated when the voltage fluctuates due to the load fluctuation of the power equipment of the transformer.
The gas pressure gauge and the gas thermometer can effectively monitor the gas pressure and the gas temperature inside the transformer, and meanwhile, the alarm or trip signal of the pressure and the temperature is output according to the requirement to carry out protection. Monitoring the pressure of gas in the transformer by using a gas pressure gauge, sending an alarm signal when the pressure reaches a high-voltage alarm value, sending a trip signal when the pressure reaches a high-voltage trip value, and sending a low-voltage alarm signal when the pressure reaches a low-voltage alarm value; the transformer adopts a top layer gas thermometer to monitor the top layer gas temperature of the transformer, and sends out an alarm signal when the top layer gas temperature reaches a high-temperature alarm temperature.
The finned radiator is mounted on the transformer, the interior of the finned radiator is communicated with the transformer body in a gas mode, and heat generated by the transformer body in the operation process can be timely dissipated through the radiator, so that the purpose of cooling the transformer is achieved.
The utility model has the beneficial effects that: using perfluoroisobutyronitrile (C)4F7N）And carbon dioxide (CO)2) The mixed environment-friendly gas is used as an insulating and cooling medium of the gas-insulated transformer, can be suitable for the fire prevention and explosion prevention of an urban transformer substation, has higher safety performance and power distribution efficiency, reduces the greenhouse effect of the gas, is more environment-friendly, and has the characteristics of fire prevention, explosion prevention and high safety performance, and also has perfluoroisobutyronitrile (C) in the transformer4F7N) low greenhouse effect and basically no influence on the environment, and is more suitable for being used in places with concentrated population in urban centers.
Drawings
FIG. 1 is a diagram of a body structure according to an embodiment of the present invention;
FIG. 2 is a front view of a transformer according to an embodiment of the present invention;
FIG. 3 is a top view of a transformer according to an embodiment of the present invention;
in the figure: the transformer comprises an iron core 1, a low-voltage coil head end outgoing line 2, a low-voltage coil 3, a coil upper portion insulation 4, a low-voltage coil tail end outgoing line 5, a main insulation 6, a high-voltage coil head end outgoing line 7, a high-voltage coil 8, a coil lower portion insulation 9, a high-voltage tail end tap outgoing line 10, a finned radiator 11, a gas pressure gauge 12, a low-voltage and low-voltage neutral point sleeve 13, an excitation-free voltage regulating switch 14, a high-voltage sleeve 15, a gas tank 16 and a gas thermometer 17.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.
A novel environment-friendly gas-insulated distribution transformer comprises a transformer body, a main insulator 6, a gas tank 16, a low-voltage and low-voltage neutral point sleeve 13, a non-excitation voltage regulating switch 14 and a high-voltage sleeve 15, wherein the transformer body comprises an iron core 1, a coil and a lead, the coil comprises a low-voltage coil 3 and a high-voltage coil 8 which are sleeved, and the lead comprises a low-voltage coil head end lead-out wire 2, a low-voltage coil tail end lead-out wire 5, a high-voltage coil head end lead-out wire 7 and a high-voltage tail end tap lead-out wire 10; the low-voltage coil 3 is wound by a copper foil or polyester film winding wire layer type, and the high-voltage coil 8 is wound by a polyester film winding wire layer type; the leading-out wire 2 at the head end of the low-voltage coil, the leading-out wire 5 at the tail end of the low-voltage coil and the leading-out wire 7 at the head end of the high-voltage coil are all arranged from the lower partThe upper end part of the coil passes through the body and is axially led out; a high-voltage terminal tap lead-out wire 10 is led out from the outer side surface of the coil; the main insulation 6 adopts a structure that a paper tube and a stay divide an air gap; the transformer is composed of A, B, C three-phase bodies, the bodies are placed in the air box 16, the internal insulation and cooling medium of the transformer is perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) Mixing the gas; the winding is connected with a low-voltage and low-voltage neutral point bushing 13, a non-excitation voltage regulating switch 14 and a high-voltage bushing 15 on an air box 16 through an internal lead, so that the functions of high-voltage and low-voltage leading-out and non-excitation voltage regulation of the three-phase transformer are realized.
The air box 16 is also provided with a finned radiator 11, an air pressure gauge 12 and an air temperature gauge 17. The dissipation of heat generated by internal loss during the operation of the transformer is realized through the finned radiator 11; the low voltage of the transformer is connected with external low-voltage electric equipment through a low-voltage neutral point bushing 13; the high voltage of the transformer is connected with external high voltage equipment through a high voltage bushing 15; the switching of the tapping position in the transformer is realized through the non-excitation voltage regulating switch 14; the gas pressure gauge 12 and the gas thermometer 17 realize the monitoring of the gas pressure inside the transformer and the gas temperature at the top layer, and can send out alarm and trip signals when necessary so as to ensure the normal operation of the transformer.
The interior of the finned radiator is communicated with the gas in the transformer gas tank.
The gas tank 16 is a metal shell and is filled with perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) And (4) mixing the gases.
The assembly method of the utility model comprises the following steps:
the transformer internal insulation and cooling medium adopts perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) Mixing the gas; the coil comprises a low-voltage coil 3 and a high-voltage coil 8 which are sleeved, the low-voltage coil 3 is wound by a copper foil or polyester film winding wire layer type, and the high-voltage coil 8 is wound by the polyester film winding wire layer type; the leading-out wire 2 at the head end of the low-voltage coil, the leading-out wire 5 at the tail end of the low-voltage coil and the leading-out wire 7 at the head end of the high-voltage coil all penetrate through the device from the upper end part of the coilThe body is axially led out; a high-voltage terminal tap lead-out wire 10 is led out from the outer side surface of the coil; the main insulation of the transformer adopts a structure that a paper tube and a stay divide an air gap; the transformer body of the three-phase transformer is formed by combining A, B, C three-phase transformer bodies and is placed in the air box 16; the outgoing line of a tap at the high-voltage tail end of the coil, the non-excitation voltage regulating switch and the high-voltage bushing are effectively connected through a lead; the secondary protection of the transformer is realized through a gas pressure gauge and a gas thermometer; the dissipation of heat generated by internal loss during the operation of the transformer is realized through the finned radiator.
The gas tank is designed and manufactured by adopting the standard of a pressure container, the strength of the environment-friendly gas-insulated transformer and the leakage rate of the environment-friendly gas in the environment-friendly gas-insulated transformer are ensured not to exceed 0.5 percent, the metal shell is filled with perfluoroisobutyronitrile (C)4F7N) and carbon dioxide (CO)2) The gas-insulated transformer manufactured by the mixed gas is a non-combustible, non-explosive, non-leakage and maintenance-free device, and meanwhile, the gas is degradable gas and not greenhouse effect gas, has no influence on the environment, and is more suitable for being used in places with high requirements on safety level in urban population concentration.
The low-voltage coil of the transformer is wound by adopting a copper foil or polyester film winding wire layer type, the high-voltage coil is wound by adopting a polyester film winding wire layer type, the process performance is excellent, the actual operability in the manufacturing process is improved, the quality of the transformer can be better ensured, and meanwhile, the insulating part in contact with the heating part of the conductor of the transformer coil is a heat-resistant insulating part with the E level or above, so that the ageing resistance of the transformer is ensured.
The low-voltage coil head end outgoing line, the low-voltage coil tail end outgoing line and the high-voltage coil head end outgoing line are axially led out from the upper end of the coil through the transformer body; the high-voltage tail end tap lead-out wire is led out from the side surface of the coil, so that the outgoing position of the transformer coil is optimized, the operability of lead connection is improved, and field wiring is facilitated.
The transformer main insulation adopts a structure that a paper tube and a stay bar are used for dividing an air gap, so that the main insulation strength between high-voltage and low-voltage coils of the transformer is improved. The adjustment of each tapping voltage of the high voltage of the transformer is realized through the effective connection of the tapping outlet at the high voltage end of the coil, the non-excitation voltage regulating switch and the high voltage bushing. The non-excitation voltage regulating switch ensures that the voltage can be regulated when the voltage fluctuates due to the load fluctuation of the power equipment of the transformer.
The gas pressure gauge and the gas thermometer can effectively monitor the gas pressure and the gas temperature inside the transformer, and meanwhile, the alarm or trip signal of the pressure and the temperature is output according to the requirement to carry out protection. Monitoring the pressure of gas in the transformer by using a gas pressure gauge, sending an alarm signal when the pressure reaches a high-voltage alarm value, sending a trip signal when the pressure reaches a high-voltage trip value, and sending a low-voltage alarm signal when the pressure reaches a low-voltage alarm value; the transformer adopts a top layer gas thermometer to monitor the top layer gas temperature of the transformer, and sends out an alarm signal when the top layer gas temperature reaches a high-temperature alarm temperature.
Install gilled radiator on the transformer, the inside gaseous UNICOM in with the transformer gas tank of gilled radiator, the heat accessible radiator that the transformer body produced in the operation in-process in time gives off, reaches the purpose to the transformer cooling.
Claims (3)
1. The utility model provides a novel gaseous insulation distribution transformer of environmental protection which characterized in that: the transformer comprises a transformer body, a main insulator (6), an air box (16), low-voltage and low-voltage neutral point sleeves (13), a non-excitation voltage regulating switch (14) and a high-voltage sleeve (15), wherein the transformer body comprises an iron core (1), a coil and a lead, the coil comprises a low-voltage coil (3) and a high-voltage coil (8) which are sleeved, and the lead comprises a low-voltage coil head end lead-out wire (2), a low-voltage coil tail end lead-out wire (5), a high-voltage coil head end lead-out wire (7) and a high-voltage tail end tap lead-out wire (10); the low-voltage coil (3) is wound by adopting a copper foil or polyester film winding wire layer type, and the high-voltage coil (8) is wound by adopting a polyester film winding wire layer type; a low-voltage coil head end outgoing line (2), a low-voltage coil tail end outgoing line (5) and a high-voltage coil head end outgoing line (7) are all axially led out from the upper end of the coil through the body; a high-voltage terminal tap lead (10) is led out from the outer side surface of the coil; the main insulation (6) adopts a structure that a paper tube and a stay divide an air gap; the transformer body of the three-phase transformer is formed by combining A, B, C three-phase transformer bodies, the transformer bodies are placed in an air box (16), and the insulating and cooling medium in the transformer adopts the mixed gas of perfluoroisobutyronitrile and carbon dioxide; the winding is connected with a low-voltage and low-voltage neutral point bushing (13), a non-excitation voltage regulating switch (14) and a high-voltage bushing (15) on an air box (16) through an internal lead, so that the functions of high-voltage and low-voltage leading-out and non-excitation voltage regulating of the three-phase transformer are realized.
2. The novel environmentally friendly gas insulated distribution transformer of claim 1, wherein: the air box (16) is also provided with a finned radiator (11), an air pressure gauge (12) and an air thermometer (17).
3. A novel environmentally friendly gas insulated distribution transformer according to claim 1 or 2, characterized in that: the gas tank (16) is a metal shell and is filled with a mixed gas of perfluoroisobutyronitrile and carbon dioxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122579571.3U CN216250318U (en) | 2021-10-26 | 2021-10-26 | Novel environment-friendly gas-insulated distribution transformer |
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| CN202122579571.3U CN216250318U (en) | 2021-10-26 | 2021-10-26 | Novel environment-friendly gas-insulated distribution transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948285A (en) * | 2021-10-26 | 2022-01-18 | 保定保菱变压器有限公司 | Novel environment-friendly gas-insulated distribution transformer and assembly method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948285A (en) * | 2021-10-26 | 2022-01-18 | 保定保菱变压器有限公司 | Novel environment-friendly gas-insulated distribution transformer and assembly method |
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