CN115060413A - Transformer and gas monitoring and controlling method thereof - Google Patents
Transformer and gas monitoring and controlling method thereof Download PDFInfo
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- CN115060413A CN115060413A CN202210396805.7A CN202210396805A CN115060413A CN 115060413 A CN115060413 A CN 115060413A CN 202210396805 A CN202210396805 A CN 202210396805A CN 115060413 A CN115060413 A CN 115060413A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/12—Alarms or signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
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Abstract
The application relates to a transformer and a gas monitoring and controlling method thereof, wherein the gas monitoring and controlling method of the transformer is applied to an oil immersed transformer with an oil conservator, and comprises the following steps: leading out the gas in the oil tank to a monitoring position above the sealing layer in the oil conservator through the guide pipe; sensing gas pressure at the monitoring location in real time; and sending a first alarm signal when the gas pressure exceeds a first preset threshold value. According to the gas monitoring and controlling method of the transformer, the space structure of the conservator is skillfully utilized, gas is guided to the upper part of the sealing layer in the conservator and cannot be contacted with oil of the transformer under the action of the sealing layer, and the collecting bag for gas collection can be protected by the conservator or can be exhausted by the conservator when necessary; therefore, under the condition of realizing monitoring, the appearance of the oil tank and the oil conservator is hardly changed, and the shell of the current product is easily modified, so that the popularization cost is reduced.
Description
Technical Field
The application relates to the field of transformer monitoring, in particular to a transformer and a gas monitoring control method thereof.
Background
When the oil-immersed transformer is used for a long time, transformer oil repeatedly rises in temperature or is in a high-temperature state for a long time, and gas, generally called organic gas, is released, so that the gas pressure in an oil tank is higher and higher, oil leakage is easily caused if the gas pressure is light, and production accidents are caused if the gas pressure is heavy.
Disclosure of Invention
Based on this, it is necessary to provide a transformer and a gas monitoring and controlling method thereof.
A gas monitoring and controlling method of a transformer is applied to an oil immersed transformer with an oil conservator and comprises the following steps:
leading out the gas in the oil tank to a monitoring position above the sealing layer in the oil conservator through the guide pipe;
sensing gas pressure at the monitoring location in real time;
and sending a first alarm signal when the gas pressure exceeds a first preset threshold value.
According to the gas monitoring and controlling method of the transformer, the space structure of the conservator is skillfully utilized, gas is guided to the upper part of the sealing layer in the conservator and cannot be contacted with oil of the transformer under the action of the sealing layer, and the collecting bag for gas collection can be protected by the conservator or can be exhausted by the conservator when necessary; therefore, under the condition of realizing monitoring, the appearance of the oil tank and the oil conservator is hardly changed, and the shell of the current product is easily modified, so that the popularization cost is reduced.
In one embodiment, when the gas pressure exceeds a second preset threshold value, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; wherein the second preset threshold is greater than the first preset threshold.
In one embodiment, a second alarm signal is sent when the first pressure relief valve is opened.
Further, the oil conservator is provided with a cabin door and a gate valve at the top, the first pressure relief valve is arranged in a linkage mode with the gate valve, when the gas pressure exceeds a second preset threshold value, the first pressure relief valve communicated with the guide pipe is opened, and the gate valve is opened in a linkage mode to enable the cabin door to be opened, so that the collecting bag is expanded out of the oil conservator.
Further, the conservator is provided with a hatch and a gate valve on top of the conservator, opening the gate valve when the gas pressure exceeds a fourth preset threshold to allow the hatch to open to allow the collection bladder to expand out of the conservator.
In one embodiment, when the gas pressure exceeds a third preset threshold, a second pressure relief valve communicated with the guide tube is opened, so that the gas enters the explosion-proof pipeline through the second pressure relief valve and is discharged; wherein the third preset threshold is greater than the first preset threshold.
In one embodiment, when the gas pressure exceeds a second preset threshold value, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; when the gas pressure exceeds a third preset threshold value, a second pressure release valve communicated with the guide tube through the collecting bag is opened, so that the gas enters the explosion-proof pipeline through the first pressure release valve, the collecting bag and the second pressure release valve in sequence and is discharged; wherein the third preset threshold is greater than the second preset threshold.
In one embodiment, a third alarm signal is sent when the second pressure relief valve is opened.
In one embodiment, the guide tube is tightly combined with the oil delivery pipe of the oil conservator; or the guide pipe is positioned in the oil conveying pipe of the oil conservator.
In one embodiment, the guiding tube is provided with a water-blocking exhaust valve at one end adjacent to the oil tank; and/or the oil tank is provided with a convex structure at the position adjacent to the guide pipe.
In one embodiment, a transformer comprises a conservator and an oil tank;
the oil conservator is communicated with the oil tank through a guide pipe and an oil conveying pipe, and a monitoring position, and a sensing device and an alarm device which are arranged at the monitoring position are arranged above a sealing layer of the oil conservator;
the oil tank leads out the gas in the oil tank to the monitoring position through the guide pipe;
the sensing device is connected with the alarm device and used for sensing the gas pressure in real time at the monitoring position and sending a first alarm signal through the alarm device when the gas pressure exceeds a first preset threshold value.
In one embodiment, the transformer is a vegetable oil transformer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 2 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 3 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 4 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 5 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of the transformer according to the present application.
Fig. 6 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 7 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Fig. 8 is a schematic flow chart of another embodiment of a gas monitoring and controlling method of a transformer according to the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The application discloses a gas monitoring and controlling method of a transformer, which comprises the following steps of part or all of the following embodiments; namely, the gas monitoring and controlling method of the transformer comprises the following technical characteristics in part or all. In an embodiment of the present application, a method for monitoring and controlling gas of a transformer is applied to an oil-immersed transformer having an oil conservator, and includes the steps of: leading out the gas in the oil tank to a monitoring position above the sealing layer in the oil conservator through a guide pipe; sensing gas pressure at the monitoring location in real time; and sending a first alarm signal when the gas pressure exceeds a first preset threshold value. According to the gas monitoring and controlling method of the transformer, the space structure of the conservator is ingeniously utilized, gas is guided to the position above the sealing layer inside the conservator and cannot be in contact with oil of the transformer under the action of the sealing layer, and the collecting bag for gas collection can be protected through the conservator or can be exhausted through the conservator when necessary; therefore, under the condition of realizing monitoring, the appearance of the oil tank and the oil conservator is hardly changed, and the shell of the current product is easily modified, so that the popularization cost is reduced.
In each embodiment, a first alarm signal is sent out when the gas pressure exceeds a first preset threshold, wherein a judgment process is included, that is, whether the gas pressure exceeds the first preset threshold is judged, and if so, the first alarm signal is sent out. As shown in fig. 1, in one embodiment, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal. Further, in each embodiment, the alarm signal includes a first alarm signal, a second alarm signal, a third alarm signal, a fourth alarm signal, and the like. It can be understood that the first alarm signal, the second alarm signal, the third alarm signal, and the fourth alarm signal may be set identically or differently, and the names are different for the convenience of distinguishing the functions and implementation manners thereof, and so on for the other embodiments, and details are not repeated. Taking the sending of the first alarm signal as an example, the sending of the first alarm signal may be implemented by using an alarm bell, a flashing light, a short message, a mobile phone APP message, a server notification and/or a fault call, and the above implementation manner is only an example and should not be considered as a special limitation for sending the alarm signal in the present application.
In one embodiment, when the gas pressure exceeds a second preset threshold value, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; wherein the second preset threshold is greater than the first preset threshold. As shown in fig. 2, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure relief valve communicated with the guide pipe, so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve.
In one embodiment, a second alarm signal is sent when the first pressure relief valve is opened. As shown in fig. 3, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure release valve communicated with the guide pipe so that the gas enters a collecting bag positioned above a sealing layer in the oil conservator through the first pressure release valve; and S700, sending a second alarm signal when the first pressure relief valve is opened.
In each embodiment, the collecting bag is usually made of expandable materials such as rubber, and is easily oxidized if exposed to the natural environment for a long time, so that the space inside the conservator is ingeniously utilized, the collecting bag is stored to guarantee the service life of the conservator, a certain expansion space is reserved, and due to the design of a sealing layer inside the conservator, transformer oil and the collecting bag are effectively separated, the transformer oil and gas are further separated, and the use safety is ensured. Further, the oil conservator is provided with a cabin door and a gate valve at the top, the first pressure relief valve is arranged in a linkage mode with the gate valve, when the gas pressure exceeds a second preset threshold value, the first pressure relief valve communicated with the guide pipe is opened, and the gate valve is opened in a linkage mode to enable the cabin door to be opened, so that the collecting bag is expanded out of the oil conservator. As shown in fig. 4, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure relief valve communicated with the guide pipe to enable the gas to enter a collecting bag above a sealing layer in the oil conservator through the first pressure relief valve, and opening the door valve in a linkage mode to enable the door to be opened so that the collecting bag is expanded out of the oil conservator; and S700, sending a second alarm signal when the first pressure relief valve is opened.
Further, the conservator is provided with a hatch and a gate valve on top of the conservator, opening the gate valve when the gas pressure exceeds a fourth preset threshold causes the hatch to open, so that the collection bladder expands out of the conservator. Further, a fourth alarm signal is issued when the gate valve is opened. In one embodiment, the fourth preset threshold is greater than the second preset threshold. As shown in fig. 5, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure relief valve communicated with the guide pipe so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; s700, sending a second alarm signal when the first pressure relief valve is opened; s800, judging whether the gas pressure exceeds a fourth preset threshold value, and if so, executing the subsequent steps; s900, opening the door valve to enable the cabin door to be opened so that the collecting bag can be expanded out of the oil conservator; s910, sending a fourth alarm signal when the door valve is opened.
In the design of each embodiment, when the gas pressure in the oil tank is higher, a first alarm signal is sent, when the gas pressure further rises, the first pressure relief valve is opened to release part of gas in the oil tank into the collecting bag, and the collecting bag is arranged in the oil conservator and is separated from the transformer oil in the oil conservator through the sealing layer. At this point, or when the gas pressure rises even further, the gate valve is opened to inflate the collecting bag at least partially outside the conservator, with a second warning signal being emitted. On one hand, gas in the oil tank is released, and the transformer oil is also regulated through an oil conservator when necessary, so that the internal pressure of the oil tank is controlled, and the problem of oil leakage caused by overhigh pressure is avoided; on the other hand, the collecting bag is protected by the oil conservator and is not easy to oxidize when not used or used in a small amount, and the oil conservator is exposed when the collecting bag is fully used, so that the expandable capacity is greatly improved; and the collecting bag can be reused after being used up, thereby saving resources and reducing the use cost.
In one embodiment, when the gas pressure exceeds a third preset threshold, a second pressure relief valve communicated with the guide tube is opened, so that the gas enters the explosion-proof pipeline through the second pressure relief valve and is discharged; wherein the third preset threshold is greater than the first preset threshold. In one embodiment, a third alarm signal is sent when the second pressure relief valve is opened. As shown in fig. 6, in one embodiment, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, if so, executing the subsequent steps; s400, sending a first alarm signal; s710, judging whether the gas pressure exceeds a third preset threshold value, if so, executing the subsequent steps; s720, opening a second pressure release valve communicated with the guide tube so that the gas enters the explosion-proof pipeline through the second pressure release valve and is discharged; and S730, sending a third alarm signal when the second pressure relief valve is opened.
In one embodiment, when the gas pressure exceeds a second preset threshold value, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; when the gas pressure exceeds a third preset threshold value, a second pressure release valve communicated with the guide tube through the collecting bag is opened, so that the gas enters the explosion-proof pipeline through the first pressure release valve, the collecting bag and the second pressure release valve in sequence and is discharged; wherein the third preset threshold is greater than the second preset threshold. In one embodiment, a third alarm signal is sent when the second pressure relief valve is opened. As shown in fig. 7, in one embodiment, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure relief valve communicated with the guide pipe so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; s700, sending a second alarm signal when the first pressure relief valve is opened; s710, judging whether the gas pressure exceeds a third preset threshold value, if so, executing the subsequent steps; s720, opening a second pressure release valve communicated with the guide tube so that the gas enters the explosion-proof pipeline through the second pressure release valve and is discharged; and S730, sending a third alarm signal when the second pressure relief valve is opened.
As shown in fig. 8, in one embodiment, the gas monitoring and controlling method of the transformer includes the steps of: s100, leading out gas in the oil tank to a monitoring position above a sealing layer in the oil conservator through a guide pipe; s200, sensing the gas pressure at the monitoring position in real time; s300, judging whether the gas pressure exceeds a first preset threshold value, and if so, executing the subsequent steps; s400, sending a first alarm signal; s500, judging whether the gas pressure exceeds a second preset threshold value, if so, executing the subsequent steps; s600, opening a first pressure relief valve communicated with the guide pipe so that the gas enters a collecting bag positioned above the sealing layer in the oil conservator through the first pressure relief valve; s700, sending a second alarm signal when the first pressure relief valve is opened; s710, judging whether the gas pressure exceeds a third preset threshold value, if so, executing the subsequent steps; s720, opening a second pressure release valve communicated with the guide tube so that the gas enters the explosion-proof pipeline through the second pressure release valve and is discharged; s730, sending a third alarm signal when the second pressure relief valve is opened; s800, judging whether the gas pressure exceeds a fourth preset threshold value, and if so, executing the subsequent steps; s900, when the gas pressure exceeds a fourth preset threshold value, opening the door valve to enable the cabin door to be opened so as to enable the collecting bag to be expanded out of the oil conservator; s910, sending a fourth alarm signal when the door valve is opened. The rest of the embodiments are analogized and are not described in detail.
Furthermore, the explosion-proof pipeline can be arranged at the upper part of the oil tank or buried underground and provided with a plurality of distributed openings. In actual use, attention needs to be paid to the discharge port of the anti-explosion pipeline, and environmental safety must be considered, so that secondary damage such as flash combustion, flash explosion and the like is avoided. Such a design is beneficial to improving the capacity of bearing gas, and even if the collecting bag is fully collected, the collecting bag has no problem, and the fool-proof performance and the safety of the system are further improved.
In each embodiment, the preset threshold includes the first preset threshold, the second preset threshold, the third preset threshold and the fourth preset threshold, and may be set according to design requirements or application requirements, where the first preset threshold, the second preset threshold, the third preset threshold and the fourth preset threshold may be set to be the same or different, and different names are for convenience of distinguishing.
In one embodiment, the guide pipe is tightly combined with the oil delivery pipe of the oil conservator, for example, the guide pipe is tightly combined with the oil delivery pipe of the oil conservator through a binding steel wire; alternatively, the guide tube is located in the oil pipe of the conservator, for example, two pipes are formed inside the oil pipe of the conservator, one pipe is used for oil transportation, and the other pipe is used as the guide tube. The design is mainly to avoid changing the current transformer structure as much as possible so as to reduce the interference to the whole system and reduce the modification cost.
In one embodiment, the guiding tube is provided with a water-blocking exhaust valve at one end adjacent to the oil tank; in one embodiment, the oil tank is provided with a convex structure at a position adjacent to the guide pipe. In one embodiment, the guiding tube is provided with a water-blocking exhaust valve at one end adjacent to the oil tank, and the oil tank is provided with a protruding structure at a position adjacent to the guiding tube. The rest of the embodiments are analogized and are not described in detail. The water-blocking exhaust valve is used for preventing transformer oil from entering the guide pipe and allowing gas to enter the guide pipe. The water-blocking exhaust valve can adopt the existing products sold in the market, such as a float type automatic exhaust valve, a molecular sieve exhaust valve and the like. Such a design facilitates the segmentation of oil and gas, enhances the safety of the outlet end of the guide tube, e.g. protecting the collection balloon.
In one embodiment, a transformer is implemented by using the gas monitoring and controlling method in any one of the above embodiments; in one embodiment, the transformer has a functional structure corresponding to each step of the gas monitoring and controlling method according to any one of the above embodiments. In one embodiment, a transformer comprises a conservator and an oil tank; the oil conservator is communicated with the oil tank through a guide pipe and an oil conveying pipe, and a monitoring position, and a sensing device and an alarm device which are arranged at the monitoring position are arranged above a sealing layer of the oil conservator; the oil tank leads out the gas in the oil tank to the monitoring position through the guide pipe; the sensing device is connected with the alarm device and used for sensing the gas pressure in real time at the monitoring position and sending a first alarm signal through the alarm device when the gas pressure exceeds a first preset threshold value. The rest embodiments are analogized in this way, and are not described in detail. By adopting the design, the space structure of the conservator is skillfully utilized, the gas is guided to the upper part of the sealing layer in the conservator, and cannot contact with the oil of the transformer under the action of the sealing layer, and the collecting bag for collecting the gas can be protected by the conservator or can be exhausted by the conservator when necessary; therefore, under the condition of realizing monitoring, the appearance of the oil tank and the oil conservator is hardly changed, and the shell of the current product is easily modified, so that the popularization cost is reduced.
In one embodiment, the transformer is an oil-filled transformer. In one embodiment, the transformer is a vegetable oil transformer, that is, vegetable oil is used as transformer oil, and compared with the conventional mineral transformer oil, the transformer oil has the advantage of high ignition point, which can be generally higher than 300 ℃, so that the safety risk is reduced; and the natural degradation rate of the vegetable oil can reach more than 90 percent, so compared with the traditional mineral oil, the natural mineral oil has incomparable environmental protection characteristics.
Other embodiments of the present application further include a transformer and a gas monitoring and controlling method thereof, wherein the transformer is formed by combining technical features of the above embodiments.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A gas monitoring and controlling method of a transformer is applied to an oil immersed transformer with an oil conservator, and is characterized by comprising the following steps:
leading out the gas in the oil tank to a monitoring position above the sealing layer in the oil conservator through the guide pipe;
sensing gas pressure at the monitoring location in real time;
and sending a first alarm signal when the gas pressure exceeds a first preset threshold value.
2. The gas monitoring and control method according to claim 1, wherein when the gas pressure exceeds a second preset threshold, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above a sealing layer in the oil conservator through the first pressure relief valve; wherein the second preset threshold is greater than the first preset threshold.
3. The gas monitoring and control method of claim 2, wherein a second alarm signal is issued when the first pressure relief valve is opened.
4. The gas monitoring and controlling method according to claim 1, wherein when the gas pressure exceeds a third preset threshold value, a second pressure relief valve communicated with the guide tube is opened, so that the gas enters an explosion-proof pipeline through the second pressure relief valve and is discharged; wherein the third preset threshold is greater than the first preset threshold.
5. The gas monitoring and control method according to claim 3, wherein when the gas pressure exceeds a second preset threshold, a first pressure relief valve communicated with the guide pipe is opened, so that the gas enters a collecting bag positioned above a sealing layer in the oil conservator through the first pressure relief valve; when the gas pressure exceeds a third preset threshold value, a second pressure release valve communicated with the guide tube through the collecting bag is opened, so that the gas is discharged after entering an explosion-proof pipeline through the first pressure release valve, the collecting bag and the second pressure release valve in sequence; wherein the third preset threshold is greater than the second preset threshold.
6. The gas monitoring and control method according to claim 4 or 5, wherein a third alarm signal is issued when the second pressure relief valve is opened.
7. The gas monitoring and control method according to claim 1, wherein the guide pipe is tightly coupled to an oil delivery pipe of the conservator; or the guide pipe is positioned in the oil conveying pipe of the oil conservator.
8. The gas monitoring and control method of claim 1, wherein the guiding tube is provided with a water-blocking exhaust valve at an end adjacent to the oil tank; and/or the oil tank is provided with a convex structure at the position adjacent to the guide pipe.
9. A transformer is characterized by comprising an oil conservator and an oil tank;
the oil conservator is communicated with the oil tank through a guide pipe and an oil conveying pipe, and a monitoring position, and a sensing device and an alarm device which are arranged at the monitoring position are arranged above a sealing layer of the oil conservator;
the oil tank leads out the gas in the oil tank to the monitoring position through the guide pipe;
the sensing device is connected with the alarm device and used for sensing the gas pressure in real time at the monitoring position and sending a first alarm signal through the alarm device when the gas pressure exceeds a first preset threshold value.
10. The transformer according to claim 9, characterized in that it is a vegetable oil transformer.
Priority Applications (1)
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| CN113744980A (en) * | 2021-09-06 | 2021-12-03 | 江西电力职业技术学院 | Transformer protection device, transformer and transformer protection method |
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