CN212136176U - 220 kV-grade natural ester insulating oil transformer - Google Patents
220 kV-grade natural ester insulating oil transformer Download PDFInfo
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- CN212136176U CN212136176U CN202021233766.1U CN202021233766U CN212136176U CN 212136176 U CN212136176 U CN 212136176U CN 202021233766 U CN202021233766 U CN 202021233766U CN 212136176 U CN212136176 U CN 212136176U
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Abstract
The utility model discloses a 220kV grade natural ester insulating oil transformer, including oil tank and the ware body of setting at the oil tank inner chamber, install high-voltage measuring device and high-pressure neutral point measuring device on the top surface of oil tank, the last high-tension bushing that is connected with of high-voltage measuring device, high-pressure neutral point measuring device is connected with high-pressure neutral point sleeve pipe, high-tension bushing and high-pressure neutral point sleeve pipe all are used for being connected with outside 220kV high tension cable, high-voltage measuring device still is connected with the high voltage winding of ware body, the ware body soaks in the natural ester insulating oil of oil tank inner chamber, the top surface of oil tank still is connected with the oil conservator, the filling has natural ester insulating oil in the oil conservator inner chamber. The utility model discloses a ware body in 220kV oil tank soaks in natural ester insulating oil, and natural ester insulating oil derives from various plants, is applicable to the intensive area of population, accords with the green advocation of making of country more, satisfies the green demand of the high voltage level transformer of social development.
Description
Technical Field
The utility model belongs to the technical field of the transformer, specifically belong to a 220kV grade natural ester insulating oil transformer.
Background
The distribution transformer is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings, and comprises an oil-immersed transformer, wherein the oil-immersed transformer is formed by placing a transformer body consisting of an iron core and a winding in a mailbox filled with transformer oil, and the traditional oil-immersed transformer adopts mineral oil or synthetic oil as a cooling medium, but the cooling medium is non-renewable and non-biodegradable, easily pollutes the land, water sources and the like when leakage occurs, and damages the environment sensitive areas such as water source areas, farmlands, scenic spots, streets and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a 220kV grade transformer ester insulating oil transformer solves the transformer oil of present high voltage grade transformer and is difficult for the degradation, leaks the problem that causes environmental pollution on every side easily, and the feature of environmental protection is poor, uses the big problem of limitation.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a 220kV grade natural ester insulating oil transformer, includes the oil tank and sets up the ware body at the oil tank inner chamber, install high-voltage measuring device and high-voltage neutral point measuring device on the top surface of oil tank, the last high-voltage bushing that is connected with of high-voltage measuring device, high-voltage neutral point measuring device is connected with high-voltage neutral point sleeve pipe, high-voltage bushing and high-voltage neutral point sleeve pipe all are used for being connected with outside 220kV high tension cable, high-voltage measuring device still is connected with the high voltage winding of ware body, the ware body soaks in the natural ester insulating oil of oil tank inner chamber, the top surface of oil tank still is connected with the oil conservator, the filling has natural ester insulating oil in the oil conservator inner chamber.
Furthermore, the transformer body comprises an iron core, a low-voltage winding, a medium-voltage winding, a high-voltage winding, a voltage regulating winding and main insulation, the voltage regulating winding, the low-voltage winding, the medium-voltage winding and the high-voltage winding are all sleeved on the iron core, the windings are separated by the main insulation, and axial oil ducts are reserved on the low-voltage winding, the medium-voltage winding, the high-voltage winding and the voltage regulating winding.
Furthermore, the low-voltage winding, the medium-voltage winding and the high-voltage winding are made of insulating materials with E-level and above heat-resistant levels, and the cushion block and the stay on the low-voltage winding, the cushion block and the stay on the medium-voltage winding and the cushion block and the stay on the high-voltage winding are made of insulating materials with E-level and above heat-resistant levels.
Furthermore, both sides of the oil tank are provided with finned radiators.
Further, the bottom of gilled radiator is provided with a plurality of fan, the side of oil tank is provided with the forced air cooling switch board, forced air cooling switch board and fan electric connection, the forced air cooling switch board is used for opening or closing the fan.
Furthermore, the outer surface of the top of the oil tank is also provided with a winding temperature controller and an oil level temperature controller, the winding temperature controller is used for monitoring the winding temperature of the transformer, and the oil level temperature controller is used for monitoring the temperature of the natural ester insulating oil positioned at the top of the oil tank.
Furthermore, a burst pressure relay is installed on the side face of the oil tank and used for sending a tripping signal.
Further, the top surface of oil tank still is provided with the vacuum type and has a switch, the inner chamber of oil tank is provided with independent grease chamber, independent grease chamber and vacuum type have a switch to be connected, independent grease chamber is used for providing power for the vacuum type has a switch to carry.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model provides a 220 kV-level transformer ester insulating oil transformer, make the ware body in the 220kV oil tank soak in natural ester insulating oil, natural ester insulating oil is high ignition point, environment-friendly liquid insulating medium, not only has good fire safety performance but also has good dielectric property, and, natural ester insulating oil has great water saturation, can effectively absorb the moisture in the insulation board, be favorable to the ageing of insulating material, and then prolong the life of transformer, simultaneously, compared with traditional mineral oil transformer, the biodegradation rate of natural ester insulating oil is high (greater than 95%), can degrade by oneself, can not cause the pollution to soil, water source etc., be applicable to water source ground, farmland, scenic spot, street etc. environment sensitive area, natural ester insulating oil derives from various plants, can effectively reduce the dependence on petroleum product, and natural ester insulating oil belongs to K-level insulating liquid, the high-voltage transformer has excellent flame-retardant property, is suitable for densely populated areas, better meets the national advocated green manufacturing, and meets the green requirements of high-voltage transformers for social development.
Further, the utility model provides a low voltage winding, well voltage winding and high voltage winding in the ware body all leave the axial oil duct to improve the mobility of natural ester insulating oil, reduce transformer winding temperature rise effectively, promote the utility model provides a high-grade transformer's whole heat dispersion.
Further, the utility model provides a low voltage winding, well voltage winding and high voltage winding are connected cushion and stay on low voltage winding, well voltage winding and high voltage winding in addition and all adopt E level and above heat-resisting grade's insulating material, and the adaptation is in the higher flash point and the ignition point of natural ester insulating oil, can promote the utility model provides a high voltage level transformer's heat-resisting grade, reduce the size of transformer, the optimization cost constitutes.
Further, the utility model provides an oil tank both sides are provided with finned radiator, increase the heat dispersion of high voltage level radiator, ensure that after the high voltage level radiator added the insulating oil of natural ester, the safe and reliable operation of high voltage level radiator.
Further, the utility model provides a finned radiator's bottom still is provided with the fan, controls the fan through the forced air cooling switch board and opens or close, promotes finned radiator outside air's circulation, the heat-sinking capability of further improvement high voltage level transformer.
Further, the utility model provides an on the oil tank still be provided with winding temperature controller and oil level temperature controller, through the temperature of winding temperature controller monitoring transformer winding, through the temperature of oil level temperature controller monitoring transformer top natural ester insulating oil, start or stop fan or finned radiator according to winding temperature controller and oil level temperature controller, the utility model discloses a temperature regulation and control is more accurate and timely.
Further, the utility model discloses on still be provided with proruption pressure relay, after the transformer breaks down, proruption pressure relay sends tripping operation signal and cuts off the operation of transformer, further promotes the utility model discloses a safe and reliable operation.
Further, the utility model discloses in adopt the vacuum type to have the load switch, wherein the vacuum type has the power source of load switch to be independent grease chamber, separates with the natural ester insulating oil of oil tank, is convenient for overhaul the switch transfer room under the condition that does not influence the transformer.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a middle device body of the present invention;
fig. 2 is a schematic diagram of a partial enlarged structure of a winding in the present invention;
fig. 3 is a schematic front view of the transformer of the present invention;
FIG. 4 is a schematic top view of the structure of FIG. 3;
FIG. 5 is a left side view of the structure of FIG. 3;
in the drawings: 1-iron core, 2-low voltage winding, 3-main insulation, 4-medium voltage winding, 5-high voltage winding, 6-voltage regulating winding, 7-high voltage measuring device, 8-high voltage bushing, 9-high voltage neutral point measuring device, 10-high voltage neutral point bushing, 11-oil tank, 12-oil storage cabinet, 13-gas relay, 14-air cooling control cabinet, 15-medium voltage measuring device, 16-medium voltage bushing, 17-low voltage outlet box, 18-low voltage bushing, 19-winding temperature controller, 20-fan, 21-plate radiator, 22-medium voltage neutral point measuring device, 23-medium voltage neutral point bushing, 24-vacuum on-load switch, 25-switch burst pressure relay, 26-grounding bushing, 27-oil level temperature controller, 28-burst pressure relay.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model provides a 220kV grade natural ester insulating oil transformer, which comprises an oil tank 11 and a transformer body, wherein the transformer body is immersed in natural ester insulating oil in the inner cavity of the oil tank, the transformer body is composed of an iron core 1, a low-voltage winding 2, a medium-voltage winding 4, a high-voltage winding 5 and a voltage-regulating winding 6, the low-voltage winding 2, the medium-voltage winding 4 and the high-voltage winding 5 are sleeved on the iron core 1, the low-voltage winding 2, the medium-voltage winding 4, the high-voltage winding 5 and the voltage-regulating winding 6 are all separated by a main insulation 3, wherein the main insulation 3 adopts a split oil gap structure of a paper tube and a stay, preferably, the heat transmission mode in the transformer is mainly realized by heat conduction and convection, wherein the heat dissipation effect of convection is particularly related to the viscosity of insulating liquid, the viscosity of the natural ester insulating oil is higher than that of mineral oil, therefore, under the same cooling structure and heat condition, the temperature difference between the topmost layer and the bottommost layer of the transformer heat dissipation equipment is increased by the characteristic, and the heat dissipation effect is affected.
Preferably, high-voltage winding 5 adopts the tip inlet wire, and the electrostatic plate is placed to high-voltage winding 5's head end, and electric field distribution under through power frequency electric field and thunder and lightning impulse electric field calculates, reduces coil thunder and lightning impulse electric field's gradient distribution down, and even potential distribution possesses good mechanical strength and heat dispersion simultaneously in order to improve insulation reliability. Wherein, the medium voltage winding 4 also adopts the tip inlet wire, and the structure of static board is placed to the head end, and low voltage winding 2 adopts spirally, and voltage regulating winding 6 adopts the laminar.
In the preferred embodiment of this embodiment, the low voltage winding 2, the medium voltage winding 4, the high voltage winding 5, and the voltage regulating winding 6 in this apparatus all use insulation materials with class E and above heat-resistant grades, and the natural ester insulation oil has higher flash point and ignition point.
In the present embodiment, as shown in fig. 3-5, the top outer surface of the oil tank 11 is provided with a high voltage measuring device 7, a medium voltage measuring device 15, a low voltage outlet box 17, a high voltage neutral point measuring device 9 and a medium voltage neutral point measuring device 22, wherein the high voltage measuring device 7 is connected with a high voltage bushing 8, the medium voltage measuring device 15 is connected with a medium voltage bushing 16, the low voltage outlet box 17 is connected with a low voltage bushing 18, the high voltage neutral point measuring device 9 is connected with a high voltage neutral point bushing 10, the medium voltage neutral point measuring device 22 is connected with a medium voltage neutral point bushing 23, after the installation of the 220 kV-grade natural ester insulating oil transformer of the present invention is completed, the connection of the 220kV high voltage side and the external 220kV high voltage cable is realized through the high voltage bushing 8 and the high voltage neutral point bushing 10, the medium voltage bushing 16 and the medium voltage neutral point bushing 23 realize the, the low-voltage bushing 18 realizes the connection of outside low-voltage cable, ensures through the ground sleeve 26 that the top surface of oil tank 11 set up the utility model discloses a safe and reliable operation.
Preferably, the two sides of the oil tank 11 are further connected with finned radiators 21, the bottom of the finned radiators 21 is further provided with a plurality of fans 20, the circulation of air outside the finned radiators 21 is promoted by the fans 20, the side edges of the oil tank 11 are provided with air cooling control cabinets 14 for controlling the fans 20 to be started or closed, and the finned radiators 21 and the fans 20 form the cooling system of the utility model, so that the cooling system can still ensure the heat dissipation performance and ensure the safe and reliable operation of the system even after the natural ester insulating oil with higher viscosity and poorer heat dissipation effect is replaced; wherein, the top surface of oil tank 11 still is provided with winding temperature controller 19 and oil level temperature controller 27, and oil level temperature controller 27 is used for monitoring the temperature of transformer top natural ester insulating oil, and winding temperature controller 19 is used for monitoring transformer winding's temperature, through the start-up and the stop of the aforesaid two temperature controller monitoring temperature then control cooling system, reaches the state of real-time supervision transformer to adjust and control cooling system.
Preferably, the utility model discloses a still be provided with secondary protection device on the oil tank 11, secondary protection device includes the burst pressure relay 28 that the oil tank 11 side set up, the switch burst pressure relay 25 that the surface of the top of oil tank 11 set up, the vacuum type that the surface of the top of oil tank 11 set up has on-load tap-changer 24 and the gas relay 13 of installing on the oil conservator 12 that the surface of the top of oil tank 11 set up, wherein, the switching arc extinguishing of vacuum type on-load switch 24 is gone on in the vacuum chamber, guarantee that transformer switch does not have the influence to natural ester insulating oil in the switching process, vacuum type on-load switch 24 adopts independent grease chamber, independent grease chamber sets up in the inner chamber of oil tank 11, be convenient for not examine and repair the switch-over room under the condition that does not; when the vacuum type on-load switch 24 on the transformer and the transformer are in failure, a tripping signal is sent out through the switch burst pressure relay 25 and the burst pressure relay 28 to cut off the operation of the transformer, and the personal safety of surrounding personnel is ensured.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A220 kV-grade natural ester insulating oil transformer is characterized by comprising an oil tank (11) and a transformer body arranged in an inner cavity of the oil tank, a high-pressure measuring device (7) and a high-pressure neutral point measuring device (9) are arranged on the outer surface of the top of the oil tank (11), the high-voltage measuring device (7) is connected with a high-voltage bushing (8), the high-voltage neutral point measuring device (9) is connected with a high-voltage neutral point bushing (10), the high-voltage bushing (8) and the high-voltage neutral point bushing (10) are both used for being connected with an external 220kV high-voltage cable, the high-voltage measuring device (7) is also connected with a high-voltage winding (5) of the transformer body, the transformer body is soaked in natural ester insulating oil in an inner cavity of the oil tank, the outer surface of the top of the oil tank (11) is further connected with an oil storage cabinet (12), and the inner cavity of the oil storage cabinet is filled with the natural ester insulating oil.
2. The 220 kV-grade natural ester insulating oil transformer as claimed in claim 1, wherein the transformer body comprises an iron core (1), a low-voltage winding (2), a medium-voltage winding (4), a high-voltage winding (5), a voltage regulating winding (6) and a main insulation (3), the voltage regulating winding (6), the low-voltage winding (2), the medium-voltage winding (4) and the high-voltage winding (5) are all sleeved on the iron core (1), each winding is separated by the main insulation (3), and axial oil ducts are reserved on the low-voltage winding (2), the medium-voltage winding (4), the high-voltage winding (5) and the voltage regulating winding (6).
3. The 220kV natural ester insulating oil transformer according to claim 1, wherein the low-voltage winding (2), the medium-voltage winding (4) and the high-voltage winding (5) are all made of insulating materials with heat resistance level E and above, and pads and supporting strips on the low-voltage winding (2), pads and supporting strips on the medium-voltage winding (4) and pads and supporting strips on the high-voltage winding (5) are all made of insulating materials with heat resistance level E and above.
4. A 220kV grade natural ester insulating oil transformer according to claim 1, characterized in that both sides of the oil tank (11) are provided with finned radiators (21).
5. The 220kV grade natural ester insulating oil transformer as claimed in claim 4, wherein a plurality of fans (20) are arranged at the bottom of the finned radiator (21), an air cooling control cabinet (14) is arranged at the side of the oil tank (11), the air cooling control cabinet (14) is electrically connected with the fans (20), and the air cooling control cabinet (14) is used for turning on or off the fans (20).
6. The 220kV grade natural ester insulating oil transformer as claimed in claim 1, wherein a winding temperature controller (19) and an oil level temperature controller (27) are further arranged on the outer surface of the top of the oil tank (11), the winding temperature controller (19) is used for monitoring the winding temperature of the transformer, and the oil level temperature controller (27) is used for monitoring the temperature of the natural ester insulating oil at the top of the oil tank.
7. A 220kV grade natural ester insulating oil transformer according to claim 1, characterized in that the side of the oil tank (11) is installed with a burst pressure relay (28), and the burst pressure relay (28) is used for sending a trip signal.
8. A 220kV grade natural ester insulating oil transformer according to claim 1, wherein the external surface of the top of the oil tank (11) is further provided with a vacuum type load switch (24), and the inner cavity of the oil tank (11) is provided with an independent oil chamber which is connected with the vacuum type load switch (24) and is used for providing power for the vacuum type load switch (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021233766.1U CN212136176U (en) | 2020-06-29 | 2020-06-29 | 220 kV-grade natural ester insulating oil transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021233766.1U CN212136176U (en) | 2020-06-29 | 2020-06-29 | 220 kV-grade natural ester insulating oil transformer |
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| CN212136176U true CN212136176U (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113035525A (en) * | 2021-05-28 | 2021-06-25 | 常州太平洋变压器有限公司 | 220kV three-dimensional wound core power transformer and core manufacturing method |
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- 2020-06-29 CN CN202021233766.1U patent/CN212136176U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113035525A (en) * | 2021-05-28 | 2021-06-25 | 常州太平洋变压器有限公司 | 220kV three-dimensional wound core power transformer and core manufacturing method |
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