CN116380805A - On-load tap-changer gas monitoring method and system - Google Patents
On-load tap-changer gas monitoring method and system Download PDFInfo
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- CN116380805A CN116380805A CN202310548732.3A CN202310548732A CN116380805A CN 116380805 A CN116380805 A CN 116380805A CN 202310548732 A CN202310548732 A CN 202310548732A CN 116380805 A CN116380805 A CN 116380805A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
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Abstract
The invention discloses a gas monitoring method and a gas monitoring system for an on-load tap-changer, wherein the method comprises the steps of installing the on-load tap-changer and a transformer; the position sensor is arranged on a transmission component of the on-load tap-changer; the method comprises the steps that a current sensor is arranged in a loop of a power electronic component of an on-load tap-changer and a change-over switch; injecting the gas separated by the transformer into a photoacoustic cavity of the photoacoustic spectrometer through an air pump; inputting the detected specific gas concentration information into a computer through a data acquisition card of the gas monitoring module, and calculating through a three-ratio method and the like to manage and analyze various gas concentration information and determine the running state of the transformer; the operation of the cooler is controlled by a locking switch according to the operation state. The invention has the beneficial effects that the specific gas concentration and temperature values of the transformer oil tank are collected to assist the staff in judging the running state information of the transformer, and different warning modes can be adopted under different warning conditions through the computer, so that the staff can react in time, and the transformer oil tank can be maintained rapidly aiming at specific conditions.
Description
Technical Field
The invention relates to the technical field of transformer gas monitoring, in particular to a method and a system for monitoring gas of an on-load tap-changer.
Background
The power transformer is one of the most critical devices in the power system, and carries the tasks of voltage transformation, electric energy distribution and transmission, whether the operation of the transformer directly affects the reliable operation of the power system, but the transformer is one of the devices in the power system, the insulation of which is most easily degraded, generally adopts transformer oil as an insulating and heat dissipation medium, the power transformer oil is a mixture of hydrocarbon compounds, and the transformer mainly consists of hydrocarbon substances, and overheat or discharge faults can occur in the transformer during the long-term operation, so that the molecular structure of oil is damaged, and then partial hydrogen is generated by cracking. In addition, some gases such as CH4, C2H6, C2H4, C2H2, CO, and CO2 are generated. However, when the transformer fails, the insulating oil is decomposed under the action of high temperature or electric arc, the content of the gas is accelerated to increase, and a large amount of combustible gas (80% of the combustible gas is hydrogen according to statistics) is generated, so that the content of the dissolved hydrogen in the oil can be used as the indicator gas of the health condition of the transformer. The method has the advantages that the characteristic gas in the transformer oil is monitored on line, and then qualitative and quantitative analysis is carried out on the characteristic gas, so that the method has important research significance for monitoring the running condition of the transformer in real time, the probability of serious faults of the transformer is reduced, and the method has important significance for improving the reliability and the safety of power supply of a power system.
One of the transformer fault analysis methods is: the faults are diagnosed by collecting dissolved gas in the transformer oil or gas at the upper cover of the transformer oil tank and analyzing the components and the content of the gas. Timely finding the faults of the transformer is helpful for taking emergency measures early, and the harmfulness of the faults is reduced.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-mentioned or existing problems occurring in the prior art.
Therefore, one of the purposes of the present invention is to provide a gas monitoring method for an on-load tap changer, which can assist a worker to detect the characteristic gas during the operation of a transformer and discover the problem during the operation in time.
In order to solve the technical problems, the invention provides the following technical scheme: an on-load tap-changer gas monitoring method comprises the steps of installing an on-load tap-changer with a transformer; the position sensor is arranged on a transmission component of the on-load tap-changer; the method comprises the steps that a current sensor is arranged in a loop of a power electronic component of an on-load tap-changer and a change-over switch; injecting the gas separated by the transformer into a photoacoustic cavity of the photoacoustic spectrometer through an air pump; inputting the detected specific gas concentration information into a computer through a data acquisition card of the photoacoustic spectrometer, and calculating through a three-ratio method and the like to manage and analyze various gas concentration information and determine the running state of the transformer; the operation of the cooler is controlled by a locking switch according to the operation state.
The on-load tap-changer gas monitoring method has the beneficial effects that: by the method, workers can be assisted in monitoring the concentration of the characteristic gas, and running problems can be found timely.
Therefore, one of the purposes of the invention is to provide a transformer tank gas monitoring system which can collect state information of a transformer during operation and prompt staff to maintain through real-time display and different early warning modes.
In order to solve the technical problems, the invention provides the following technical scheme: the transformer unit comprises a locking switch, a cooler connected with the locking switch through a circuit and connected with the transformer oil tank, an air pump connected with the transformer oil tank, a photoacoustic spectrometer connected with the air pump and a computer connected with the photoacoustic spectrometer.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the transformer unit also comprises an on-load tap-changer connected with the transformer, a position sensor connected with the on-load tap-changer and a current sensor connected with the on-load tap-changer; the position sensor and the current sensor are connected with a computer through an information acquisition processor.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the transformer unit further comprises a temperature sensor connected with the transformer oil tank; the temperature sensor is used for collecting temperature data information of the transformer oil tank.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the position sensor is used for detecting the action information of a switching knife switch of the on-load tap-changer; the current sensor is arranged in a loop of the power electronic component of the on-load tap-changer and the change-over switch and used for detecting current information of the power electronic component.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the computer also comprises a buzzer and a flash lamp which are connected with the computer.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the temperature sensor collects temperature data information of the transformer oil tank and transmits the temperature data information to the computer through the wireless transceiver module, the computer processes the temperature data information and buzzes and warns through the buzzer when the temperature exceeds a preset first warning threshold value, and a worker is prompted to enable the cooler to be connected with a power supply through the locking switch for cooling;
the photoacoustic spectrometer detects and analyzes the gas, the specific gas concentration information is input into the computer through a data acquisition card of the photoacoustic spectrometer, the computer processes and analyzes the specific gas concentration information, the specific gas concentration information is displayed through the display screen, and the working state of the transformer is determined by an auxiliary worker; when the specific gas concentration information exceeds a preset second warning threshold value, the computer prompts the staff through a flash lamp.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the locking switch comprises a shell assembly component, a sleeve adjusting component, a contact platform component and a circuit contact component, wherein the sleeve adjusting component is arranged in the shell assembly component, one end of the sleeve adjusting component extends outwards, the contact platform component is spliced with the sleeve adjusting component and arranged in the shell assembly component, and the circuit contact component is arranged in the shell assembly component and below the contact platform component.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the shell assembly component comprises a containing shell, an inner adjusting heat dissipation opening arranged on one side of the containing shell, a sliding rail groove arranged on the inner wall where the inner adjusting heat dissipation opening is positioned, and a T-shaped sliding groove arranged on the inner wall of the other side;
the sleeve adjusting component comprises a hollow sleeve, a pressing plate connected with the bottom of the hollow sleeve, a semi-arc unlocking plate arranged at one end of the pressing plate and a poking block arranged at the other end of the pressing plate.
As a preferred embodiment of the transformer tank gas monitoring system of the present invention, wherein: the contact piece platform assembly comprises a conical bottom block, locking slots symmetrically arranged on two sides of the conical bottom block, a rectangular slot arranged in the middle of the conical bottom block, a sleeve rod arranged in the middle of the rectangular slot, two groups of inclined locking blocks respectively contacted with inclined surfaces on two sides of the conical bottom block, a connecting frame arranged on one side of the inclined locking blocks, a T-shaped limiting supporting block connected with the outer side of the connecting frame, an arc-shaped top driven block connected with one end of the connecting frame, a first spring arranged on one side of the inclined locking blocks and connected with the inner wall of the shell assembly, two groups of telescopic rods respectively arranged on the left upper corner and the right lower corner of the conical bottom block, a second spring arranged on the outer side of the telescopic rods and connected with the top of the conical bottom block and the top wall of the shell assembly respectively, an L-shaped locking plate spliced with the sliding rail groove and arranged on one side of the conical bottom block, a third spring respectively connected with the inner side of the L-shaped locking plate and the inner wall of the shell assembly and a contact piece arranged on the bottom of the conical bottom block.
The invention has the beneficial effects that: the invention assists the staff to judge the running state information of the transformer by collecting the specific gas concentration and temperature values of the transformer oil tank, and adopts different warning modes under different warning conditions by the computer, thereby facilitating the staff to react in time and realizing quick maintenance aiming at specific conditions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a flow chart of a gas monitoring method of an on-load tap-changer.
Fig. 2 is a schematic structural diagram of a first embodiment of a transformer tank gas monitoring system.
Fig. 3 is a schematic structural diagram of a first embodiment of a transformer tank gas monitoring system.
Fig. 4 is a schematic structural diagram of a first embodiment of a transformer tank gas monitoring system.
Fig. 5 is a schematic diagram of a lockout switch of a transformer tank gas monitoring system in elevation.
Fig. 6 is a schematic diagram of a lock switch back view of a transformer tank gas monitoring system.
Fig. 7 is a schematic diagram of a lock switch split for a transformer tank gas monitoring system.
FIG. 8 is a schematic diagram of the internal structure of a lock switch of a transformer tank gas monitoring system.
Fig. 9 is another schematic view of the internal structure of the lock switch of the transformer tank gas monitoring system.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1, a first embodiment of the present invention provides a gas monitoring method for an on-load tap changer, which can assist a worker to detect a characteristic gas during operation of a transformer and discover problems during operation in time.
Specifically, an on-load tap-changer is installed with a transformer;
the position sensor is arranged on a transmission component of the on-load tap-changer;
the method comprises the steps that a current sensor is arranged in a loop of a power electronic component of an on-load tap-changer and a change-over switch;
injecting the gas separated by the transformer into a photoacoustic cavity of the photoacoustic spectrometer through an air pump;
inputting the detected specific gas concentration information into a computer through a data acquisition card of the gas monitoring module, and calculating through a three-ratio method and the like to manage and analyze various gas concentration information and determine the running state of the transformer;
the operation of the cooler is controlled by the locking switch 100 according to the operation state.
It should be noted that the gas monitoring module is a photoacoustic spectrometer. The running state of the on-load tap-changer of the transformer is transmitted to a computer through a position sensor and a current sensor, the gas separated by the transformer is monitored by a photoacoustic spectrometer to be transmitted to the computer, and the computer is used for assisting a worker in judging the running state of the transformer through real-time display.
In conclusion, the method can assist workers to monitor the concentration of the characteristic gas and discover running problems in time.
Example 2
Referring to fig. 2 to 4, in a second embodiment of the present invention, a transformer tank gas monitoring system is provided, which can assist a worker in detecting a characteristic gas during operation of a transformer, and in finding a problem during operation in time.
Specifically, the transformer unit M includes a locking switch 100, a cooler 200 connected to the locking switch 100 and to a transformer oil tank, an air pump 300 connected to the transformer oil tank, a gas monitoring module 400 connected to the air pump 300, and a processing module 500 connected to the gas monitoring module 400.
Further, the transformer unit M further includes an on-load tap-changer 600 connected to the transformer, a position sensor 700 connected to the on-load tap-changer 600, and a current sensor 800 connected to the on-load tap-changer 600; the position sensor 700 and the current sensor 800 are connected with the processing module 500 through an information acquisition processor.
Further, the transformer unit M further includes a temperature sensor 900 connected to the transformer oil tank; the temperature sensor 900 is used for collecting temperature data information of the transformer oil tank.
Further, the position sensor 700 is configured to detect motion information of a switching knife of the on-load tap-changer 600; the current sensor 800 is disposed in a loop of a power electronic component and a change-over switch of the on-load tap-changer 600, and is configured to detect current information of the power electronic component.
Further, the processing module 500 further includes a buzzer 501 and a flash 502 connected thereto.
It should be noted that, each device in this embodiment may be a conventional device, and in this embodiment, the lock switch 100 may be a conventional manual switch. The processing module 500 employs a computer. The gas monitoring module 400 adopts the existing photoacoustic spectrometer, the gas pump injects the gas separated by the transformer into the photoacoustic cavity of the photoacoustic spectrometer, after the infrared light of the blackbody light source passes through the filter plate, the filter plate selects a narrow-band spectrum with the center frequency corresponding to the characteristic absorption frequency of the preselected gas, and the narrow-band spectrum is modulated into a flicker alternating light source with a certain frequency through the chopper. After the gas to be detected in the photoacoustic cavity is irradiated by the flicker alternating light source, the gas returns to the ground state in a radiation or non-radiation mode; non-radiative relaxation process pressure, the energy of the system is finally converted into translational energy of molecules, and the gas is caused to be locally heated, so that sound waves are generated in the gas pool. The sound wave is detected by a microphone, the intensity of which is proportional to the magnitude of the electrical signal. After being processed by the pre-amplification conditioning module, the phase-locked amplification conditioning module and the like, the extracted electric signals can correspond to specific gas concentration information and the like, the specific gas concentration information is input into a computer through a data acquisition card, and then the three-ratio method and the like are used for calculating, so that management and analysis of various gas concentration information are realized, and the running state of the transformer is determined.
The working principle of the system is as follows: the operating state of the on-load tap-changer 600 mounted on the transformer can be monitored by the position sensor 700 and the current sensor 800, and the switch information and the current information are transmitted to the processing module 500 to be displayed.
The temperature sensor 900 is used for collecting temperature data information of the transformer oil tank and transmitting the temperature data information to the processing module 500 through the wireless transceiver module, the processing module 500 processes the temperature data information and displays the temperature data information through the display screen, and when the temperature exceeds a preset first warning threshold value, the buzzer 501 is used for buzzing and warning, so that a worker is prompted to enable the cooler 200 to be connected with a power supply through the locking switch 100 for cooling;
the gas monitoring module 400 is used for detecting and analyzing the gas, the data acquisition card of the gas monitoring module 400 is used for inputting specific gas concentration information into the processing module 500, the processing module 500 is used for processing and analyzing the specific gas concentration information and displaying the specific gas concentration information through the display screen, and the working personnel are assisted in determining the running state of the transformer; when the specific gas concentration information exceeds a preset second alert threshold, the processing module 500 will prompt the worker through the flash 502.
In summary, the specific gas concentration and temperature values of the transformer oil tank are collected to assist the staff in judging the running state information of the transformer, and different warning modes can be adopted under different warning conditions through the computer, so that the staff can react in time, and the transformer oil tank can be maintained rapidly according to specific conditions.
Example 3
Referring to fig. 5 to 9, in a third embodiment of the present invention, a specific structure of a lock switch 100 is provided in comparison with embodiment 2, and the rest is the same as embodiment 2, which is capable of self-locking protection when energized and adaptively adjusting a heat radiation effect.
Specifically, the locking switch 100 includes a housing assembly 101, a sleeve adjusting assembly 102 disposed in the housing assembly 101 and having one end extending outwards, a contact platform assembly 103 inserted into the sleeve adjusting assembly 102 and disposed in the housing assembly 101, and a line contact assembly 104 disposed in the housing assembly 101 and disposed below the contact platform assembly 103.
Further, the housing assembly 101 includes a housing 101a, an inner heat dissipation opening 101b disposed on one side of the housing 101a, a sliding rail groove 101c disposed on an inner wall of the inner heat dissipation opening 101b, and a T-shaped sliding groove 101d disposed on an inner wall of the other side.
Further, the sleeve adjusting assembly 102 includes a hollow sleeve 102a, a pressing plate 102b connected to the bottom of the hollow sleeve 102a, a semi-arc unlocking plate 102c disposed at one end of the pressing plate 102b, and a toggle block 102d disposed at the other end of the pressing plate 102 b.
Further, the contact piece platform assembly 103 includes a conical bottom block 103a, locking slots 103b symmetrically arranged on two sides of the conical bottom block 103a, a rectangular slot 103c arranged in the middle of the conical bottom block 103a, a sleeve rod 103d arranged in the middle of the rectangular slot 103c, two groups of inclined locking blocks 103e respectively contacted with inclined surfaces on two sides of the conical bottom block 103a, a connecting frame 103f arranged on one side of the inclined locking block 103e, a T-shaped limit supporting block 103g connected with the outer side of the connecting frame 103f, an arc-top driven block 103h connected with one end of the connecting frame 103f, a first spring 103i arranged on one side of the inclined locking block 103e and connected with the inner wall of the shell assembly 101, two groups of telescopic rods 103j respectively arranged on the left upper corner and the right lower corner of the conical bottom block 103a, a second spring 103k arranged on the outer side of the telescopic rods 103j and two ends respectively connected with the top of the conical bottom block 103a and the shell assembly 101, a sliding rail 103c arranged on the inner side of the conical bottom block 103a, and a sliding rail 103c connected with one side of the conical bottom block 103f, and an opening and closing plate 101L-shaped contact piece assembly 101L arranged on one side of the conical bottom block and the sliding rail assembly L.
Preferably, the tapered bottom block 103a is supported and limited by the telescopic rod 103j and the second spring 103k to be capable of lifting and lowering only in the vertical direction, and the tapered bottom block 103a is prevented from rotating. The two groups of telescopic rods 103j respectively arranged at the left upper corner and the right lower corner of the conical bottom block 103a can limit the rotation direction of the sleeve adjusting assembly 102, so that the sleeve adjusting assembly can only rotate along the correct rotation direction, and abnormal unlocking and adjustment of a heat dissipation part caused by error of the rotation direction are avoided.
Further, the line contact assembly 104 includes a line 104a and a connection switch 104b. In this embodiment, the contact 103n adopts the prior art, and the connection switch 104b may adopt any existing switch for connecting the line 104a when the contact 103n contacts the top thereof and disconnecting the same when the contact is disconnected, so that details are omitted.
It should be noted that, two disconnected lines of the connection switch 104b are connected to the power source and the cooler 200, respectively, and the start and stop of the cooler 200 can be controlled by adjusting the lock switch 100. The size of the internal-adjusting heat dissipation port 101b is the same as that of the L-shaped opening and closing plate 103L, so that the internal-adjusting heat dissipation port is convenient to keep sealing during storage. The sleeve rod 103d is inserted into the hollow sleeve 102a, the height of the hollow sleeve 102a is higher than that of the sleeve rod 103d, and the height of the hollow sleeve 102a can be adjusted adaptively according to operation requirements and is not limited to the height in the drawing. The length and width of the pressing plate 102b are the same as those of the rectangular slot 103c, and the height of the pressing plate 102b is smaller than that of the rectangular slot 103c, so that the pressing plate 102b can be stopped in a limited state and move up and down in the rectangular slot 103 c. The first spring 103i adopts a retarding spring, and the rebound speed of the retarding spring is smaller than that of the rest springs.
When the self-locking device is used, a worker can realize communication and keep self-locking by only pressing the sleeve adjusting assembly 102, so that the self-locking device is simple and convenient, and error touch is avoided.
Referring to the figure, only the top of the hollow sleeve 102a is required to be pressed, so that the pressing plate 102b presses the tapered bottom block 103a downward, and the telescopic rod 103j and the second spring 103k are stretched and have a tendency to return to their original state. The T-shaped limiting support block 103g is inserted into the T-shaped chute 101d in an adaptive manner, and supports the inclined locking block 103 e. Therefore, when the conical bottom block 103a is pressed down, the inclined surfaces at the bottom ends of the two sides of the conical bottom block 103a will press the two sets of inclined surface locking blocks 103e to move outwards to contact with the vertical side surface of the conical bottom block 103a, and the two sets of inclined surface locking blocks 103e can only move along a straight line under the insertion limit of the T-shaped limit supporting block 103g and the T-shaped chute 101d, and the first spring 103i will be pressed to have a tendency of restoring. When the conical bottom block 103a descends a certain distance to enable the bottom contact piece 103n to be in contact with the top of the connecting switch 104b, the two groups of inclined locking blocks 103e relatively move to the locking slots 103b on two sides of the conical bottom block 103a and pop out to be inserted into the locking slots 103b under the action of the first springs 103i, so that the rebound trend of the second springs 103k is prevented, and the conical bottom block 103a is limited and fixed and kept electrified in a self-locking state.
To prevent emissions from escaping over time, which would interfere with the proper use of the power supply or device, the sealed housing assembly 101 may be adjusted by the sleeve adjustment assembly 102. Only the hollow sleeve 102a rotates in the correct rotation direction for a small half circle, the hollow sleeve 102a drives the pressing plate 102b to rotate, and at the same time, the poking block 102d at one end of the pressing plate 102b contacts with the L-shaped opening and closing plate 103L in the middle of rotation and pushes the L-shaped opening and closing plate 103L to move along the sliding rail groove 101c, the third spring 103m connected with the L-shaped opening and closing plate 103L is extruded and has a restoring trend, when the pressing plate 102b and the rectangular slot 103c are positioned on the same vertical plane, the L-shaped opening and closing plate 103L enables the inner heat dissipation opening 101b to be maximally cooled, then only the pressing plate 102b is pushed into the rectangular slot 103c, and the semi-arc unlocking plate 102c at one end of the pressing plate 102b falls on the two groups of arc top driven blocks 103h which are shifted to one side of the rectangular slot 103c due to the plugging of the inclined plane locking block 103e and the locking slot 103b. So far, the rectangular slot 103c on the conical bottom block 103a limits the pressing plate 102b to avoid moving, and the two groups of telescopic rods 103j limit the conical bottom block 103a to prevent rotation, so that the rebound trend of the third spring 103m is prevented, the internal locking is realized, and the opening of the internal adjusting heat dissipation port 101b is kept.
When the connection needs to be disconnected, only on the basis of the above process, a worker presses the hollow sleeve 102a to enable the pressing plate 102b and the semi-arc unlocking plate 102c to be completely pushed into the rectangular slot 103c, and the semi-arc unlocking plate 102c presses the two groups of arc top driven blocks 103h to move outwards when moving downwards and enables the inclined plane locking block 103e to be far separated from the locking slot 103b through the connecting frame 103 f. In the process, the side surface of the poking block 102d keeps contact with the outer side of the L-shaped opening and closing plate 103L, so that the L-shaped opening and closing plate 103L is prevented from rebounding. The hollow sleeve 102a is loosened, the conical bottom block 103a is restored to the original height under the action of the second spring 103k, and then the pressing plate 102b is pulled out of the rectangular slot 103c through the hollow sleeve 102a and rotated back to the original angle, so that the third spring 103m is unlocked and rebounded to seal the inner adjusting heat dissipation port 101b again through the L-shaped opening and closing plate 103L. The inclined surface locking block 103e contacts with the bottom inclined surface of the conical bottom block 103a again under the retarded rebound of the first spring 103i, so that the reset is realized, and the repeated use is convenient.
In conclusion, the circuit can be communicated by simply pressing the sleeve adjusting component, and the self-locking is realized in the on state, so that the false touch and false break are avoided; the shell assembly component is a completely closed shell at the beginning, and when the power is on and heat is required to be dissipated, the heat dissipation port can be opened and locked in the interior only by rotating the sleeve adjusting component for half a circle and pushing the sleeve adjusting component into the rectangular slot, so that reclosing caused by external factors is avoided; when the contact platform is disconnected, the contact platform assembly can be unlocked by pushing the rotating sleeve adjusting assembly into the rectangular slot completely, so that the contact platform assembly can be popped out and powered off.
It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (10)
1. The on-load tap-changer gas monitoring method is characterized by comprising the following steps of: comprising the steps of (a) a step of,
installing an on-load tap-changer and a transformer;
the position sensor is arranged on a transmission component of the on-load tap-changer;
the method comprises the steps that a current sensor is arranged in a loop of a power electronic component of an on-load tap-changer and a change-over switch;
injecting the gas separated by the transformer into a photoacoustic cavity of the photoacoustic spectrometer through an air pump;
inputting the detected specific gas concentration information into a computer through a data acquisition card of the gas monitoring module, and calculating through a three-ratio method and the like to manage and analyze various gas concentration information and determine the running state of the transformer;
the operation of the cooler is controlled by a lock switch (100) according to the operation state.
2. A transformer tank gas monitoring system comprising the on-load tap changer gas monitoring method of claim 1, characterized by: comprising the steps of (a) a step of,
the transformer unit (M) comprises a locking switch (100), a cooler (200) connected with the locking switch (100) in a line and connected with a transformer oil tank, an air pump (300) connected with the transformer oil tank, a gas monitoring module (400) connected with the air pump (300), and a processing module (500) connected with the gas monitoring module (400).
3. The transformer tank gas monitoring system of claim 2, wherein: the transformer unit (M) further comprises an on-load tap-changer (600) connected to the transformer, a position sensor (700) connected to the on-load tap-changer (600), and a current sensor (800) connected to the on-load tap-changer (600); the position sensor (700) and the current sensor (800) are connected with the processing module (500) through an information acquisition processor.
4. The transformer tank gas monitoring system of claim 3, wherein: the transformer unit (M) further comprises a temperature sensor (900) connected to the transformer tank; the temperature sensor (900) is used for acquiring temperature data information of the transformer oil tank.
5. The transformer tank gas monitoring system of claim 4, wherein: the position sensor (700) is used for detecting the action information of a switching knife switch of the on-load tap-changer (600); the current sensor (800) is arranged in a loop of a power electronic component and a change-over switch of the on-load tap-changer (600) and is used for detecting current information of the power electronic component.
6. The transformer tank gas monitoring system of claim 5, wherein: the processing module (500) further comprises a buzzer (501) and a flash lamp (502) which are connected with the processing module.
7. The transformer tank gas monitoring system of claim 6, wherein: the temperature sensor (900) collects temperature data information of a transformer oil tank and transmits the temperature data information to the processing module (500) through the wireless receiving and transmitting module, the processing module (500) processes the temperature data information and carries out buzzing early warning through the buzzer (501) when the temperature exceeds a preset first warning threshold value, and prompts a worker to enable the cooler (200) to be connected with a power supply through the locking switch (100) for cooling;
the gas monitoring module (400) detects and analyzes the gas, specific gas concentration information is input into the processing module (500) through a data acquisition card of the gas monitoring module (400), the processing module (500) processes and analyzes the specific gas concentration information, the specific gas concentration information is displayed through a display screen, and a worker is assisted in determining the running state of the transformer; when the specific gas concentration information exceeds a preset second warning threshold value, the processing module (500) prompts the staff through the flash lamp (502).
8. The transformer tank gas monitoring system of any one of claims 1 to 7, wherein: the locking switch (100) comprises a shell assembly component (101), a sleeve adjusting component (102) arranged in the shell assembly component (101) and with one end extending outwards, a contact piece platform component (103) which is inserted into the sleeve adjusting component (102) and arranged in the shell assembly component (101), and a circuit contact component (104) which is arranged in the shell assembly component (101) and arranged below the contact piece platform component (103).
9. The transformer tank gas monitoring system of claim 8, wherein: the shell assembly component (101) comprises a containing shell (101 a), an inner adjusting heat dissipation opening (101 b) arranged on one side of the containing shell (101 a), a sliding rail groove (101 c) arranged on the inner wall where the inner adjusting heat dissipation opening (101 b) is positioned, and a T-shaped sliding groove (101 d) arranged on the inner wall of the other side;
the sleeve adjusting assembly (102) comprises a hollow sleeve (102 a), a pressing plate (102 b) connected with the bottom of the hollow sleeve (102 a), a semi-arc unlocking plate (102 c) arranged at one end of the pressing plate (102 b), and a poking block (102 d) arranged at the other end of the pressing plate (102 b).
10. The transformer tank gas monitoring system of claim 9, wherein: the contact piece platform component (103) comprises a conical bottom block (103 a), locking slots (103 b) symmetrically arranged on two sides of the conical bottom block (103 a), a rectangular slot (103 c) arranged in the middle of the conical bottom block (103 a), a sleeve rod (103 d) arranged in the middle of the rectangular slot (103 c) bottom slot, two groups of inclined locking blocks (103 e) respectively contacted with inclined surfaces on two sides of the conical bottom block (103 a), a connecting frame (103 f) arranged on one side of the inclined locking block (103 e), a T-shaped limit supporting block (103 g) connected with the outer side of the connecting frame (103 f), an arc-top driven block (103 h) connected with one end of the connecting frame (103 f), a first spring (103 i) arranged on one side of the inclined locking block (103 e) and connected with the inner wall of the shell assembly component (101), two groups of telescopic rods (103 j) respectively arranged on the left upper corner and the right lower corner of the conical bottom block (103 a), a connecting frame (103 f) arranged on one side of the conical bottom block and the outer side of the conical bottom block (103 e), a second spring (103L) and a sliding rail (103L) arranged on the outer side of the conical bottom block (103L) and the inner wall of the conical bottom block (103L) respectively, and a contact (103 n) provided at the bottom of the tapered bottom block (103 a).
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| CN202310548732.3A CN116380805B (en) | 2023-05-16 | 2023-05-16 | On-load tap-changer gas monitoring method and system |
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| CN101479821A (en) * | 2006-06-22 | 2009-07-08 | 罗伯特·博世有限公司 | Electrical switch comprising a locking element |
| RU2013127145A (en) * | 2013-03-14 | 2014-12-20 | Светлана Михайловна Рассальская | HIGH VOLTAGE ELECTRICAL EQUIPMENT (HEO) MONITORING SYSTEM |
| CN114113384A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司平顶山供电公司 | Power transformer body and on-load tap-changer integrated chromatographic on-line monitoring device |
| CN115469219A (en) * | 2022-09-14 | 2022-12-13 | 国网智能电网研究院有限公司 | On-load tap-changer monitoring device, method, equipment and storage medium |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101479821A (en) * | 2006-06-22 | 2009-07-08 | 罗伯特·博世有限公司 | Electrical switch comprising a locking element |
| RU2013127145A (en) * | 2013-03-14 | 2014-12-20 | Светлана Михайловна Рассальская | HIGH VOLTAGE ELECTRICAL EQUIPMENT (HEO) MONITORING SYSTEM |
| CN114113384A (en) * | 2021-11-22 | 2022-03-01 | 国网河南省电力公司平顶山供电公司 | Power transformer body and on-load tap-changer integrated chromatographic on-line monitoring device |
| CN115469219A (en) * | 2022-09-14 | 2022-12-13 | 国网智能电网研究院有限公司 | On-load tap-changer monitoring device, method, equipment and storage medium |
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