CN219957764U - Transformer partial discharge simulator - Google Patents
Transformer partial discharge simulator Download PDFInfo
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- CN219957764U CN219957764U CN202321696949.0U CN202321696949U CN219957764U CN 219957764 U CN219957764 U CN 219957764U CN 202321696949 U CN202321696949 U CN 202321696949U CN 219957764 U CN219957764 U CN 219957764U
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Abstract
The utility model provides a simulation device for partial discharge of a transformer, which comprises: a power supply; a first housing; the simulation probe is detachably arranged at one end part of the first shell; a cable having an end electrically connected to the analogue probe; the other end part of the cable is electrically connected with the power supply; the ultrahigh frequency sensor is used for acquiring a discharge signal of the analog probe; and the oscilloscope is electrically connected with the ultrahigh frequency sensor and is used for receiving the discharge signal sent by the ultrahigh frequency sensor. By adopting the utility model, the flexible conversion of the analog partial discharge type can be realized by replacing the analog probe; partial discharge of different positions and different discharge types can be simulated in the internal cavity of the transformer.
Description
Technical Field
The embodiment of the utility model relates to the technical field of transformer manufacturing, in particular to a simulation device for partial discharge of a transformer.
Background
Transformers are critical components in electrical power systems. The state of the transformer is directly related to the stable operation of the power system. The partial discharge phenomenon is generated in the transformer due to the problems of design, manufacturing process and the like or long-term operation insulation aging, and the insulation strength of the whole transformer is rapidly reduced along with the deepening of the partial discharge degree, so that serious faults can be possibly caused finally. Partial discharge is an important cause of insulation degradation of a transformer, and the partial discharge inside the transformer can be found timely, so that further loss can be effectively avoided.
At present, the position for simulating partial discharge by adopting the existing simulation device is a fixed position in the internal cavity of the transformer, and the type of discharge which can be simulated by the existing simulation device is single.
Disclosure of Invention
The embodiment of the utility model provides a simulation device for partial discharge of a transformer, which aims to solve the problems that the position for simulating the partial discharge by adopting the existing simulation device is a fixed position in an internal cavity of the transformer and the type of the discharge which can be simulated by the existing simulation device is single.
In order to solve the technical problems, the utility model is realized as follows:
in a first aspect, an embodiment of the present utility model provides a device for simulating partial discharge of a transformer, including:
a power supply;
a first housing;
the simulation probe is detachably arranged at one end part of the first shell;
a cable having an end electrically connected to the analogue probe; the other end part of the cable is electrically connected with the power supply;
the ultrahigh frequency sensor is used for acquiring a discharge signal of the analog probe;
and the oscilloscope is electrically connected with the ultrahigh frequency sensor and is used for receiving the discharge signal sent by the ultrahigh frequency sensor.
Alternatively, the process may be carried out in a single-stage,
the first shell is provided with a first cavity, and two ends of the first shell are provided with a first opening and a second opening which are communicated with the first cavity;
the simulation probe is detachably arranged at the first opening;
the other end of the cable passes through the first chamber from the first opening and extends out of the first chamber from the second opening to be electrically connected with the power supply.
Optionally, the simulation device further includes:
a transformer housing having a second chamber and having a third opening and a fourth opening in communication with the second chamber;
one end part of the first shell, provided with the analog probe, penetrates through the third opening and stretches into the second cavity, and the other end part of the first shell is positioned outside the second cavity;
the first end part of the ultrahigh frequency sensor penetrates through the fourth opening and stretches into the second cavity, and the second end part of the ultrahigh frequency sensor, which is positioned outside the transformer shell, is electrically connected with the oscilloscope.
Alternatively, the process may be carried out in a single-stage,
the fourth openings are provided with at least two arranged at intervals, and the first end part can penetrate through any one of the fourth openings to extend into the second chamber;
the transformer housing is also provided with an observation window.
Alternatively, the process may be carried out in a single-stage,
the first shell is made of polymethyl methacrylate (PMMA).
Alternatively, the process may be carried out in a single-stage,
the analogue probe comprises:
the first seat body is detachably arranged in the first opening and is electrically connected with one end part of the cable;
a second seat body having a third chamber, one end of the second seat body having a fifth opening communicating with the third chamber, the second seat body being connected to the first seat body through the fifth opening; a first electrode is arranged at the other end part of the second seat body, and the first electrode is positioned in the third chamber;
the second electrode is arranged on the first seat body and penetrates through the fifth opening to extend into the third chamber.
Alternatively, the process may be carried out in a single-stage,
the second electrode is a tip electrode;
the end face of the side, opposite to the second electrode, of the first electrode is provided with an oilpaper insulating medium, and the tip vertex of the tip electrode points to the first electrode and is spaced from the oilpaper insulating medium.
Alternatively, the process may be carried out in a single-stage,
the second electrode is a surface electrode;
the end face of the first electrode, which is opposite to the second electrode, is provided with a surface-immersed paper board, and one end part of the surface-immersed electrode, which is opposite to the first electrode, is abutted against the surface-immersed paper board.
Alternatively, the process may be carried out in a single-stage,
the analog probe further comprises:
and the suspension electrode is positioned between the first electrode and the second electrode, and two ends of the suspension electrode are respectively connected with the first electrode and the second electrode.
Alternatively, the process may be carried out in a single-stage,
the analog probe further comprises:
the air gap discharging test piece is positioned between the first electrode and the second electrode, and two ends of the air gap discharging test piece are respectively connected with the first electrode and the second electrode.
Alternatively, the process may be carried out in a single-stage,
the second seat body is made of polymethyl methacrylate (PMMA) and is cylindrical;
the second seat body is provided with at least two through holes on the peripheral side wall, and all the through holes are communicated with the third chamber.
In an embodiment of the present utility model, an analog device includes: a power supply; a first housing; the simulation probe is detachably arranged at one end part of the first shell; a cable having an end electrically connected to the analogue probe; the other end part of the cable is electrically connected with the power supply; the ultrahigh frequency sensor is used for acquiring a discharge signal of the analog probe; and the oscilloscope is electrically connected with the ultrahigh frequency sensor and is used for receiving the discharge signal sent by the ultrahigh frequency sensor. The simulation probe is detachably arranged at one end part of the first shell, and when the partial discharge simulation type needs to be converted, a user can realize flexible conversion of the simulated partial discharge type by replacing the simulation probe; by adopting the embodiment of the utility model, a user can control the extending distance of the end part of the first shell, provided with the simulation probe, extending into the internal cavity of the transformer, change the position of partial discharge and realize the simulation of partial discharge of different positions and different discharge types in the internal cavity.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic diagram of a partial discharge simulation device of a transformer according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an analog probe in an analog device for partial discharge of a transformer according to an embodiment of the present utility model;
FIG. 3 is a second schematic diagram of an analog probe in an analog device for partial discharge of a transformer according to an embodiment of the present utility model;
FIG. 4 is a third schematic diagram of the structure of the simulation probe in the simulation device for partial discharge of the transformer according to the embodiment of the present utility model;
FIG. 5 is a schematic diagram of a simulation probe in a simulation apparatus for partial discharge of a transformer according to an embodiment of the present utility model;
wherein: 100. a winding; 200. an iron core;
1. a power supply;
2. a first housing; 2a, a first chamber; 21. a first opening; 22. a second opening;
3. simulating a probe; 31. a first base; 32. a second seat body; 32a, a third chamber; 321. a fifth opening; 33. a first electrode; 34. a second electrode; 35. an oiled paper insulating medium; 36. a surface oil immersed paperboard; 37. a suspension electrode; 38. an air gap discharging test piece;
4. a cable;
5. an ultrahigh frequency sensor;
6. an oscilloscope;
7. a transformer housing; 7a, a second chamber; 71. a third opening; 72. and a fourth opening.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
An embodiment of the present utility model provides a device for simulating partial discharge of a transformer, referring to fig. 1, fig. 1 is a schematic structural diagram of the device for simulating partial discharge of a transformer according to an embodiment of the present utility model, where the device includes:
a power supply 1;
a first housing 2;
an analogue probe 3 detachably provided at one end of the first housing 2;
a cable 4, one end of the cable 4 is electrically connected with the analog probe 3; the other end of the cable 4 is electrically connected with the power supply 1;
the ultrahigh frequency sensor 5 is used for acquiring a discharge signal of the analog probe 3;
and the oscilloscope 6 is electrically connected with the ultrahigh frequency sensor 5 and is used for receiving the discharge signal sent by the ultrahigh frequency sensor 5.
In some embodiments of the utility model, the power supply 1 may be a power supply with a test transformer for regulating the voltage of the power supply 1 to a mains frequency voltage. The power frequency voltage refers to the frequency of an industrial alternating current power supply, and the frequency is expressed in hertz (Hz). The power frequency voltage of the domestic single-phase power supply is 50 Hz and 220V. The power frequency voltage of the domestic three-phase power supply is 50 Hz 380V. The industrial frequency voltage is not uniform standard in the world and is greatly different from country to country due to the unbalance of the industrial development of the world and the influence of colonial system during the second battle period, so the industrial frequency voltage in the embodiment of the utility model cannot be exhausted and cannot be considered as unclear. The user can specifically select the power frequency voltage according to the simulation requirement. It can be understood that the user can also set the power frequency voltage of the change to study the influence of the power frequency voltage change on the partial discharge.
When partial discharge simulation is required, a user stretches one end part of the first shell 2 provided with the simulation probe 3 into an inner cavity of the transformer through a flange opening at the top of the transformer shell, so that the simulation probe 3 stretches into the inner cavity. The analog probe 3 is electrically connected to the power supply 1 through a cable 4, and the power supply 1 applies a power frequency voltage to the analog probe 3. The analogue probe 3 is excited by the mains frequency voltage to generate a discharge signal which produces a partial discharge in the internal chamber of the transformer. It will be appreciated that the user can control the penetration distance of the first housing 2 into the interior chamber, changing the position of the analogue probe 3 in the interior chamber of the transformer and thus the position of the partial discharge.
In some embodiments of the utility model, the analogue probe 3 has a plurality of categories, each category of analogue probe 3 simulating a different type of partial discharge. The analog probe 3 is detachably arranged at one end of the first shell, and when the analog type of the partial discharge needs to be converted, a user can flexibly convert the analog type of the partial discharge by replacing the analog probe 3.
Specifically, when the analogue probe 3 needs to be replaced, the user removes the first housing 2 from the internal chamber of the transformer, removes the original analogue probe 3 from the first housing 2, and installs the replaced analogue probe 3 on the first housing 2. The user stretches one end of the first shell 2 provided with the simulation probe 3 into the internal cavity of the transformer through the flange opening at the top of the transformer shell, so that the simulation probe 3 stretches into the internal cavity to continue the partial discharge simulation.
In some embodiments of the utility model, the cable 4 may be a coaxial cable.
In some embodiments of the present utility model, an end portion of the cable 4 is electrically connected to the analogue probe 3, and may be an end portion of the first housing 2 provided with the analogue probe 3, and is electrically connected to the analogue probe 3 through a nut.
In some embodiments of the utility model, the cable 4 is optionally fixedly connected to the outer side wall of the first housing 2. In practical application, when partial discharge simulation is required, a user stretches one end part of the first shell 2 provided with the simulation probe 3 into an inner cavity of the transformer through a flange opening at the top of the transformer shell, so that the simulation probe 3 stretches into the inner cavity. At this time, the other end of the cable 4 protrudes outside the internal chamber through the flange opening at the top of the transformer housing and is electrically connected to the power source 1. The analog probe 3 is electrically connected to the power supply 1 through a cable 4, and the power supply 1 applies a power frequency voltage to the analog probe 3. The analogue probe 3 is excited by the mains frequency voltage to generate a discharge signal which produces a partial discharge in the internal chamber of the transformer. It will be appreciated that the user can control the penetration distance of the first housing 2 into the interior chamber, changing the position of the analogue probe 3 in the interior chamber of the transformer and thus the position of the partial discharge.
The Ultra High Frequency (UHF) refers to a radio wave having a wavelength ranging from 1m to 1dm and a frequency ranging from 300 to 3000 MHz.
The ultra-high frequency UHF partial discharge detection method comprises the following steps: the ultra-high frequency electromagnetic wave signal is detected, the detection range is larger, the influence of corona interference in the air is avoided, the detection is sensitive to various defects, and the detection sensitivity can reach several pCs; the UHF detection method has strong anti-interference capability, is insensitive to corona discharge interference in the air, but has reaction to the discharge of a suspension conductor on an overhead line; the gas-insulated metal-enclosed switchgear has high sensitivity to various discharge defects of GIS (gas-insulated metal-enclosed switchgear); the signal propagation attenuation is small, the detection range is large, and the detection range can reach tens of meters generally.
In some embodiments of the present utility model, electromagnetic interference can be effectively avoided by using the uhf sensor 5, and detection with high sensitivity and high accuracy can be realized for partial discharge.
In some embodiments of the present utility model, the user may implement a study of the partial discharge positioning algorithm by analyzing the discharge signal displayed on the oscilloscope 6. And, the user can also convert the partial discharge time domain signal (namely the change rule of the discharge signal along with time) and the voltage signal (power frequency signal) of the test transformer into PRPD (partial discharge with phase resolution, phase Resolved Partial Discharge) spectrograms, which are used for researching the statistical spectrogram characteristics of different forms of discharge.
In an embodiment of the present utility model, an analog device includes: a power supply 1; a first housing 2; an analogue probe 3 detachably provided at one end of the first housing 2; a cable 4, one end of the cable 4 is electrically connected with the analog probe 3; the other end of the cable 4 is electrically connected with the power supply 1; the ultrahigh frequency sensor 5 is used for acquiring a discharge signal of the analog probe 3; and the oscilloscope 6 is electrically connected with the ultrahigh frequency sensor 5 and is used for receiving the discharge signal sent by the ultrahigh frequency sensor 5. The analog probe 3 is detachably arranged at one end part of the first shell 2, and when the analog type of partial discharge needs to be converted, a user can realize flexible conversion of the analog type of partial discharge by replacing the analog probe 3; by adopting the embodiment of the utility model, a user can control the extending distance of the end part of the first shell 2 provided with the simulation probe 3 extending into the internal cavity of the transformer, change the position of partial discharge and realize the simulation of partial discharge of different positions and different discharge types in the internal cavity.
In some embodiments of the utility model, the method, optionally,
referring to fig. 1 to 5, the first housing 2 has a first chamber 2a, and both end portions of the first housing 2 have a first opening 21 and a second opening 22 communicating with the first chamber;
the analogue probe 3 is detachably arranged at the first opening 21;
the other end portion of the cable 4 passes through the first chamber 2a from the first opening 21, and extends out of the first chamber 2a from the second opening 22 to be electrically connected to the power source 1.
In some embodiments of the present utility model, the detachable connection of the analog probe 3 to the first housing 2 may be a threaded connection, in particular: the analogue probe 3 is provided with a first thread, the first opening 21 is provided with a second thread, and the analogue probe 3 is detachably arranged in the first opening 21 through the matching connection of the first thread and the second thread.
In the embodiment of the utility model, the other end part of the cable 4 passes through the first cavity 2a from the first opening 21 and extends out of the first cavity 2a from the second opening 22 to be electrically connected with the power supply 1, the first shell 2 plays a role in protecting the cable 4, the problem that an external insulating layer of the cable 4 is scratched and rubbed with the transformer shell in the process of changing the partial discharge position of a user is avoided, the cable 4 is prevented from generating electric leakage, and the safety of the user is ensured.
In some embodiments of the utility model, the method, optionally,
the first housing 2 has a first chamber 2a, and both end portions of the first housing 2 have a first opening 21 and a second opening 22 communicating with the first chamber;
the analogue probe 3 is detachably arranged at the first opening 21;
the cable 4 is fixedly connected with the outer side wall of the first housing 2.
In practical application, when partial discharge simulation is required, a user stretches one end part of the first shell 2 provided with the simulation probe 3 into an inner cavity of the transformer through a flange opening at the top of the transformer shell, so that the simulation probe 3 stretches into the inner cavity. At this time, the other end of the cable 4 protrudes outside the internal chamber through the flange opening at the top of the transformer housing and is electrically connected to the power source 1. The analog probe 3 is electrically connected to the power supply 1 through a cable 4, and the power supply 1 applies a power frequency voltage to the analog probe 3. The analogue probe 3 is excited by the mains frequency voltage to generate a discharge signal which produces a partial discharge in the internal chamber of the transformer. It will be appreciated that the user can control the penetration distance of the first housing 2 into the interior chamber, changing the position of the analogue probe 3 in the interior chamber of the transformer and thus the position of the partial discharge.
In some embodiments of the utility model, the method, optionally,
the simulation device further comprises:
a transformer housing 7 having a second chamber 7a and having a third opening 71 and a fourth opening 72 communicating with the second chamber 7 a;
one end of the first housing 2 provided with the analogue probe 3 protrudes into the second chamber 7a through the third opening 71, and the other end of the first housing 2 is located outside the second chamber 7 a;
the first end of the uhf sensor 5 protrudes through the fourth opening 72 into the second chamber 7a, and the second end of the uhf sensor 5, which is located outside the transformer housing 7, is electrically connected to the oscilloscope 6.
In some embodiments of the utility model, the third opening 71 may be a flange opening; the fourth opening 72 may be a flange opening. In particular to the embodiment of the present utility model, referring to fig. 1, the third opening 71 may be located at the top of the transformer housing 7.
In the embodiment of the utility model, one end part of the first shell 2 provided with the simulation probe 3 passes through the third opening 71 and stretches into the second cavity 7a, namely the simulation probe 3 stretches into the second cavity 7a, so that the simulation probe 3 is close to the working condition of an actual transformer, and high-accuracy partial discharge simulation is realized.
In an embodiment of the present utility model, the transformer housing 7 may be a housing of a transformer under test, as shown in fig. 1, and the transformer under test further includes an iron core 200 located in the second chamber 7a, and a winding 100 wound around the iron core 200.
In the embodiment of the utility model, the first end of the ultrahigh frequency sensor 5 is a signal receiving end. The simulation probe 3 stretches into the second cavity 7a, the simulation probe 3 is close to the working condition of the actual transformer, and high-accuracy partial discharge simulation is achieved. The analog probe 3 stretches into the second cavity 7a and the first end part of the ultrahigh frequency sensor 5 stretches into the second cavity 7a through the fourth opening 72 to be combined, and the analog probe 3 and the ultrahigh frequency sensor 5 are both positioned in the second cavity 7a, so that the ultrahigh frequency sensor 5 can be close to a discharge site, the probability of attenuation and other signal doping interference in the process of transmitting a discharge signal is reduced, and the ultrahigh frequency sensor 5 can acquire a high-accuracy discharge signal.
In the embodiment of the utility model, the second end part of the ultrahigh frequency sensor 5, which is positioned outside the transformer shell 7, is a signal output end, and the second end part is electrically connected with the oscilloscope 6 and is used for sending the discharge signal acquired by the first end part to the oscilloscope 6. The high-accuracy discharge signal acquired by the ultrahigh frequency sensor 5 can be sent to the oscilloscope 6 by the arrangement, and a foundation is laid for a user to obtain a high-value research result according to the discharge signal displayed on the oscilloscope 6.
When it is necessary to perform the partial discharge simulation, the user projects an end portion of the first housing 2 provided with the simulation probe 3 into the second chamber 7a through the third opening 71 so that the simulation probe 3 projects into the second chamber 7 a. The analog probe 3 is electrically connected to the power supply 1 through a cable 4, and the power supply 1 applies a power frequency voltage to the analog probe 3. The analogue probe 3 is excited by the mains frequency voltage to generate a discharge signal which produces a partial discharge in the internal chamber of the transformer. The ultrahigh frequency sensor 5 acquires a discharge signal and sends the discharge signal to the oscilloscope 6, so that a user can analyze and judge partial discharge by observing the discharge signal displayed on the oscilloscope 6.
In some embodiments of the utility model, the method, optionally,
the fourth openings 72 have at least two spaced apart, the first end portion being capable of extending into the second chamber 7a through any one of the fourth openings 72;
the transformer housing 7 is also provided with a viewing window (not shown). The user can observe the spatial position of the analogue probe 3 inside the transformer through an observation window (not shown in the figure), and then adjust the spatial position of the analogue probe 3 inside the transformer by controlling the extension or retraction of the first housing 2 relative to the internal chamber of the transformer.
In the embodiment of the utility model, a user can obtain the discharge signals at different positions by penetrating the ultrahigh frequency sensor 5 into the second cavity 7a through different fourth openings 72. Compared with the method for analyzing the discharge signals at a single position, the method for analyzing the discharge signals at different positions by using the discharge signals at different positions is beneficial to eliminating accidental factor interference and obtaining more accurate analysis results.
In some embodiments of the utility model, optionally, the uhf sensor 5 has at least two and is equal to the number of fourth openings 72. Each ultrahigh frequency sensor 5 is electrically connected with the oscilloscope 6, and the first end parts of each ultrahigh frequency sensor 5 penetrate through the fourth opening 72 to extend into the second cavity 7a in a one-to-one correspondence manner, so that more accurate measurement of partial discharge is realized.
In some embodiments of the utility model, the method, optionally,
the first housing 2 is made of polymethyl methacrylate (PMMA).
In the embodiment of the present utility model, the first housing 2 is made of organic glass, i.e. polymethyl methacrylate PMMA. PMMA is a high molecular compound polymerized by methyl methacrylate, and is an important thermoplastic plastic with earlier development. The organic glass is divided into four types of colorless transparent, colored transparent, pearlescent and embossed organic glass. The organic glass commonly called as acrylic, chinese art acrylic and ya Ge Li has the advantages of good transparency, chemical stability, mechanical property, weather resistance, easy dyeing, easy processing, attractive appearance and the like. The organic glass is also called gelatin glass, acrylic glass and the like.
According to the embodiment of the utility model, the first shell 2 of PMMA is adopted, so that convenient processing is realized on the basis of ensuring high insulation performance, and the manufacturing cost of the first shell 2 is reduced.
In some embodiments of the utility model, the method, optionally,
the analogue probe 3 includes:
the first seat 31 is detachably provided in the first opening 21 and is electrically connected to one end of the cable 4;
the second seat 32 having a third chamber 32a, one end of the second seat 32 having a fifth opening 321 communicating with the third chamber 32a, the second seat 32 being connected to the first seat 31 through the fifth opening 321; the other end of the second seat 32 is provided with a first electrode 33, and the first electrode 33 is positioned in the third chamber 32 a;
the second electrode 34 is disposed on the first base 31 and extends into the third chamber 32a through the fifth opening 321.
In some embodiments of the utility model, the cable 4 may be a coaxial cable. Specifically, the center conductor of the coaxial cable is electrically connected to the first housing 31, and a commercial voltage is applied to the second electrode 34 through the first housing 31. The shielding layer at one end of the coaxial cable is connected to the first electrode 33, and the shielding layer at the other end of the coaxial cable is grounded, so that the first electrode 33 is grounded. Referring to fig. 1, the end of the cable 4 extending to the cable 4 electrically connected to the power source 1 is provided with a grounding mark, namely, the shielding layer is grounded.
In some embodiments of the present utility model, the first housing 31 is a conductor, and is electrically connected to one end of the cable 4 through the first housing 31, so that the cable 4 applies the mains voltage to the second electrode 34 provided on the first housing 31, but the first electrode 33 is not applied with the mains voltage. Further, since the second electrode 34 receives a high voltage with respect to the first electrode 33, the second electrode 34 may be referred to as a high voltage electrode and the first electrode may be referred to as a low voltage electrode in practical applications.
In some embodiments of the utility model, optionally, referring to FIG. 2, the second electrode 34 is a tip electrode;
the end face of the first electrode 33 opposite to the second electrode 34 is provided with a oilpaper insulating medium 35, and the tip apex of the tip electrode is directed to the first electrode 33 and is spaced apart from the oilpaper insulating medium 35.
In the embodiment of the utility model, the second electrode 34 is a tip electrode; the end face of the first electrode 33 opposite to the second electrode 34 is provided with an oilpaper insulating medium 35, and the tip vertex of the tip electrode points to the first electrode 33 and is spaced from the oilpaper insulating medium 35, so that the simulation of the tip discharge defect can be realized.
In some embodiments of the utility model, optionally, referring to fig. 3, the second electrode 34 is a faceted electrode;
the end surface of the first electrode 33 opposite to the second electrode 34 has a surface-immersed paper sheet 36, and one end of the surface electrode opposite to the first electrode 33 is abutted against the surface-immersed paper sheet 36.
In the embodiment of the present utility model, the second electrode 34 is a surface electrode; the end surface of the first electrode 33 opposite to the second electrode 34 has a surface oil-impregnated sheet 36, and one end of the surface electrode opposite to the first electrode 33 is abutted against the surface oil-impregnated sheet 36, so that the simulation of the surface discharge defect can be realized.
In some embodiments of the present utility model, optionally, referring to fig. 4, the analog probe 3 further includes:
the floating electrode 37 is located between the first electrode 33 and the second electrode 34, and both ends of the floating electrode 37 are connected to the first electrode 33 and the second electrode 34, respectively.
In the embodiment of the present utility model, the simulation probe 3 further comprises: the floating electrode 37 is located between the first electrode 33 and the second electrode 34, and both ends of the floating electrode 37 are respectively connected to the first electrode 33 and the second electrode 34, so that the floating discharge defect can be simulated.
In some embodiments of the present utility model, optionally, referring to fig. 5, the analog probe 3 further includes:
the air gap discharging test piece 38 is located between the first electrode 33 and the second electrode 34, and two end parts of the air gap discharging test piece 38 are respectively connected with the first electrode 33 and the second electrode 34.
In the embodiment of the utility model, the air gap discharging test piece 38 may be specifically composed of three layers of insulating oil-immersed paper, specifically, the three layers of insulating oil-immersed paper are closely adhered, wherein the upper layer and the lower layer are of complete oil-immersed paper, the middle oil-immersed paper is provided with a hole in the center, and the three layers of oil-immersed paper are bonded by using epoxy resin.
In the embodiment of the present utility model, the analog probe 3 further includes: the air gap discharge test piece 38 is located between the first electrode 33 and the second electrode 34, and two ends of the air gap discharge test piece 38 are respectively connected with the first electrode 33 and the second electrode 34, so that simulation of air gap discharge defects can be realized.
In some embodiments of the utility model, the method, optionally,
the second seat 32 is made of polymethyl methacrylate PMMA and is cylindrical;
the second seat 32 has at least two through holes on its peripheral wall, and all the through holes are communicated with the third chamber 32 a.
In the embodiment of the utility model, the second seat 32 is made of polymethyl methacrylate PMMA, and the PMMA is insulating, heat-resistant and stable in chemical property, so that an excellent protective effect is achieved, and the PMMA is easy to process, so that the manufacturing cost of the second seat 32 is reduced. The second seat 32 has at least two through holes on its peripheral wall, and all the through holes are communicated with the third chamber 32a, so that on one hand, the through holes are beneficial to charge collection, and the successful implementation of discharge simulation is ensured; on the other hand, the provision of the through-holes allows heat generated by the discharge to be dissipated to the third chamber 32a via the through-holes, thereby functioning as heat dissipation.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (11)
1. A simulation device for partial discharge of a transformer, comprising:
a power supply;
a first housing;
the simulation probe is detachably arranged at one end part of the first shell;
a cable having an end electrically connected to the analogue probe; the other end part of the cable is electrically connected with the power supply;
the ultrahigh frequency sensor is used for acquiring a discharge signal of the analog probe;
and the oscilloscope is electrically connected with the ultrahigh frequency sensor and is used for receiving the discharge signal sent by the ultrahigh frequency sensor.
2. A device for simulating partial discharge of a transformer according to claim 1,
the first shell is provided with a first cavity, and two ends of the first shell are provided with a first opening and a second opening which are communicated with the first cavity;
the simulation probe is detachably arranged at the first opening;
the other end of the cable passes through the first chamber from the first opening and extends out of the first chamber from the second opening to be electrically connected with the power supply.
3. A device for simulating partial discharge of a transformer according to claim 1,
the simulation device further includes:
a transformer housing having a second chamber and having a third opening and a fourth opening in communication with the second chamber;
one end part of the first shell, provided with the analog probe, penetrates through the third opening and stretches into the second cavity, and the other end part of the first shell is positioned outside the second cavity;
the first end part of the ultrahigh frequency sensor penetrates through the fourth opening and stretches into the second cavity, and the second end part of the ultrahigh frequency sensor, which is positioned outside the transformer shell, is electrically connected with the oscilloscope.
4. A device for simulating partial discharge of a transformer according to claim 3,
the fourth openings are provided with at least two arranged at intervals, and the first end part can penetrate through any one of the fourth openings to extend into the second chamber;
the transformer housing is also provided with an observation window.
5. The device for simulating partial discharge of a transformer of claim 1, wherein:
the first shell is made of polymethyl methacrylate (PMMA).
6. A simulation device of partial discharge of a transformer according to claim 2, wherein,
the analogue probe comprises:
the first seat body is detachably arranged in the first opening and is electrically connected with one end part of the cable;
a second seat body having a third chamber, one end of the second seat body having a fifth opening communicating with the third chamber, the second seat body being connected to the first seat body through the fifth opening; a first electrode is arranged at the other end part of the second seat body, and the first electrode is positioned in the third chamber;
the second electrode is arranged on the first seat body and penetrates through the fifth opening to extend into the third chamber.
7. The device for simulating partial discharge of a transformer of claim 6, wherein:
the second electrode is a tip electrode;
the end face of the side, opposite to the second electrode, of the first electrode is provided with an oilpaper insulating medium, and the tip vertex of the tip electrode points to the first electrode and is spaced from the oilpaper insulating medium.
8. The device for simulating partial discharge of a transformer of claim 6, wherein:
the second electrode is a surface electrode;
the end face of the first electrode, which is opposite to the second electrode, is provided with a surface-immersed paper board, and one end part of the surface-immersed electrode, which is opposite to the first electrode, is abutted against the surface-immersed paper board.
9. A transformer partial discharge simulation apparatus according to claim 6, wherein,
the analog probe further comprises:
and the suspension electrode is positioned between the first electrode and the second electrode, and two ends of the suspension electrode are respectively connected with the first electrode and the second electrode.
10. A transformer partial discharge simulation apparatus according to claim 6, wherein,
the analog probe further comprises:
the air gap discharging test piece is positioned between the first electrode and the second electrode, and two ends of the air gap discharging test piece are respectively connected with the first electrode and the second electrode.
11. The device for simulating partial discharge of a transformer of claim 6, wherein:
the second seat body is made of polymethyl methacrylate (PMMA) and is cylindrical;
the second seat body is provided with at least two through holes on the peripheral side wall, and all the through holes are communicated with the third chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321696949.0U CN219957764U (en) | 2023-06-30 | 2023-06-30 | Transformer partial discharge simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321696949.0U CN219957764U (en) | 2023-06-30 | 2023-06-30 | Transformer partial discharge simulator |
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| Publication Number | Publication Date |
|---|---|
| CN219957764U true CN219957764U (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321696949.0U Active CN219957764U (en) | 2023-06-30 | 2023-06-30 | Transformer partial discharge simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219957764U (en) |
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2023
- 2023-06-30 CN CN202321696949.0U patent/CN219957764U/en active Active
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