CN212622907U - Transformer partial discharge thing networking monitoring devices - Google Patents
Transformer partial discharge thing networking monitoring devices Download PDFInfo
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- CN212622907U CN212622907U CN202021413118.4U CN202021413118U CN212622907U CN 212622907 U CN212622907 U CN 212622907U CN 202021413118 U CN202021413118 U CN 202021413118U CN 212622907 U CN212622907 U CN 212622907U
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Abstract
The utility model discloses a transformer partial discharge thing networking monitoring devices, include: the signal acquisition module is arranged in the transformer, is connected with the ultrasonic sensor and the earth electric wave sensor and is used for acquiring ultrasonic signals and earth electric wave signals in the transformer; and monitor terminal, through the thing networking with the signal acquisition module communication for the signal of receiving signal acquisition module output carries out analysis processes to the signal, and outwards sends alarm information and locating information when the signal is unusual, the beneficial effects of the utility model are that: by utilizing the combination of ultrasonic monitoring and earth electric wave monitoring technology, the stability and accuracy of monitoring signals are improved, the alarm and positioning can be timely realized, the local discharge information can be conveniently acquired, and the safety of electric power operation is improved.
Description
Technical Field
The utility model relates to a transformer partial discharge monitoring devices specifically is a transformer partial discharge thing networking monitoring devices.
Background
The transformer faults are mainly caused by factors such as insulation aging, overload, three-phase load unbalance, line inrush current and dampness. Before an accident is caused by the factors, the partial discharge stage is usually passed first, and the operation state of the transformer can be reflected in time according to the intensity of the partial discharge, but in the prior art, the following monitoring methods are adopted for the partial discharge stage: the method comprises a pulse current method, an ultrasonic method, an ultrahigh frequency method and other detection methods, wherein the ultrasonic method, the pulse current method and the ultrahigh frequency method are widely applied.
(1) The ultrasonic detection method is a method for judging and analyzing partial discharge according to an ultrasonic signal generated by the partial discharge. The typical ultrasonic sensor has the frequency band of 40kHz-200kHz mostly, and has the advantages that on one hand, the safe operation of the electrical main equipment is not influenced, and on the other hand, the influence of electromagnetic interference is small; (2) the pulse current method is a partial discharge detection method which is the earliest researched and most widely applied, and the measurement principle is as follows: when partial discharge occurs, charge movement is caused, the movement charge can generate pulse current in a peripheral measurement loop, and the measurement of the partial discharge can be realized by detecting the pulse current; (3) the ultrahigh frequency method is a popular method in the existing partial discharge detection, the method receives electromagnetic wave signals in a UHF frequency band radiated in the partial discharge process through an ultrahigh frequency antenna to detect the partial discharge fault, and due to the characteristic of strong anti-interference capability of the ultrahigh frequency method and the shielding effect of a transformer box body, the anti-interference capability of the transformer measured by the method is superior to that of the traditional partial discharge detection method at present, and the method is favorable for the online monitoring of the partial discharge of the transformer; (4) in the gas chromatography detection method, after partial discharge of a transformer, an insulating material is decomposed, a lot of gases are generated, the detection of the components and the content of the gases is performed by the so-called gas chromatography detection method, and the gases generated after partial discharge are mainly hydrogen and acetylene. Although the gas components can be changed under the condition of overheating, the result is generally accurate if the gas components are distinguished according to the proportion, the gas chromatography detection method has strong anti-interference capability, stable performance in the detection process, simple and convenient operation and automatic identification, thereby being widely applied; (5) the infrared thermal imaging method can cause the local temperature to rise after partial discharge, and the method for detecting the change of the heat and converting the change into an electric signal is the infrared thermal imaging method, has important significance for qualitative analysis, but needs to be searched for quantitative analysis for a long time.
The method for detecting the ultrasonic wave by using the ultrasonic wave independently has the defects that the wave impedance between a discharge source and an ultrasonic probe is extremely complex, the ultrasonic wave signal is often weakened due to complex propagation path and serious attenuation, the signal is weak when reaching the wall of a transformer box, the on-site detection sensitivity is difficult to meet the requirement, and the method is mainly used as an auxiliary measurement method to be matched with other methods at present; the disadvantage of using the earth wave detection method alone is that although the sensitivity is high, it is easily affected by the discharge signal at other positions, and the partial discharge position cannot be accurately located. In addition, no matter the ultrasonic detection method and the earth electric wave detection method, the traditional partial discharge device does not have the functions of online monitoring and data remote transmission, cannot perform long-term online monitoring on the discharge of the transformer, and timely reminds operation and maintenance personnel to process faults when the discharge is generated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a transformer partial discharge thing networking monitoring devices to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a transformer partial discharge thing networking monitoring devices includes:
the signal acquisition module is arranged in the transformer, is connected with the ultrasonic sensor and the earth electric wave sensor and is used for acquiring ultrasonic signals and earth electric wave signals in the transformer; and
and the monitoring terminal is communicated with the signal acquisition module through the Internet of things and is used for receiving the signal output by the signal acquisition module, analyzing and processing the signal and sending alarm information and positioning information outwards when the signal is abnormal.
As a further aspect of the present invention: the ultrasonic sensor and the earth electric wave sensor are connected with the signal acquisition module through shielded cables, and probe ends of the ultrasonic sensor and the earth electric wave sensor are positioned on the surface of the shell of the transformer.
As a further aspect of the present invention: the monitoring terminal includes:
the cloud server is communicated with the signal acquisition module through the Internet of things and is used for receiving the signals output by the signal acquisition module and analyzing and processing the signals;
and the operation and maintenance monitoring center is communicated with the cloud server and is used for receiving the processing result of the cloud server and sending alarm information and positioning information outwards when the signal is abnormal.
As a further aspect of the present invention: the monitoring terminal further comprises a mobile terminal App, and the mobile terminal App is communicated with the cloud server through a network.
As a further aspect of the present invention: the frequency range of the ultrasonic signals collected by the ultrasonic sensor is 20 KHz-200KHz, and the frequency range of the geoelectric wave signals collected by the geoelectric wave sensor is 3 MHz-100 MHz.
Compared with the prior art, the beneficial effects of the utility model are that: by utilizing the combination of ultrasonic monitoring and earth electric wave monitoring technology, the stability and accuracy of monitoring signals are improved, the alarm and positioning can be timely realized, the local discharge information can be conveniently acquired, and the safety of electric power operation is improved.
Drawings
Fig. 1 is a schematic structural diagram of a transformer partial discharge internet of things monitoring device.
In the figure: 100-transformer, 200-signal acquisition module, 300-internet of things, 400-cloud server, 500-mobile terminal App and 600-operation and maintenance monitoring center.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1, in an embodiment of the present invention, a transformer partial discharge internet of things monitoring device includes a signal acquisition module 200 and a monitoring terminal, where the signal acquisition module 200 is installed in a transformer 100, and the signal acquisition module 200 is connected to an ultrasonic sensor and a ground electric wave sensor, and is used for acquiring an ultrasonic signal and a ground electric wave signal in the transformer 100; the monitoring terminal is communicated with the signal acquisition module 200 through the internet of things 300, and is used for receiving the signals output by the signal acquisition module 200, analyzing and processing the signals, and sending alarm information and positioning information outwards when the signals are abnormal.
In this embodiment, the ultrasonic signal frequency range that ultrasonic sensor gathered is 20KHz ~ 200KHz, and the earth electric wave signal frequency range that earth electric wave sensor gathered is 3MHz ~ 100MHz to detect transformer 100's partial discharge, it utilizes the combination of ultrasonic monitoring and earth electric wave monitoring technique, has promoted monitoring signal's stability and accuracy and can in time report to the police and fix a position, and it is more convenient to obtain the partial discharge information, has improved the security of electric power operation.
It should be noted that, regarding the acquisition of the positioning information, in this embodiment, each signal acquisition module 200 is provided with a unique number corresponding to the corresponding transformer 100, and when performing signal transmission, the number information may be transmitted, so as to acquire information of the corresponding transformer 100; or, a positioning module such as a GPS may be directly integrated in the signal acquisition module 200, so as to obtain the positioning information, which is not specifically limited herein.
Referring to fig. 1, as a preferred embodiment of the present invention, the ultrasonic sensor and the earth electric wave sensor are connected to the signal collecting module 200 through a shielded cable, and probe ends of the ultrasonic sensor and the earth electric wave sensor are located on the surface of the casing of the transformer 100.
In the embodiment, the probe ends of the ultrasonic sensor and the earth electric wave sensor are positioned on the surface of the shell of the transformer 100, so that the transformer 100 does not need to be disassembled, the invasion damage is reduced, and the sensor is positioned on the surface of the shell of the transformer 100 during partial discharge, so that the sensor is less influenced by the outside during partial discharge and does not occupy space on the outside; or the ultrasonic sensor and the earth electric wave sensor are directly attached to the surface of the shell of the transformer 100, which is more convenient.
Referring to fig. 1, as another preferred embodiment of the present invention, the monitoring terminal includes a cloud server 400 and an operation and maintenance monitoring center 600, the cloud server 400 communicates with the signal acquisition module 200 through the internet of things 300, and is configured to receive the signal output by the signal acquisition module 200 and analyze the signal; the operation and maintenance monitoring center 600 is in communication with the cloud server 400, and is configured to receive a processing result of the cloud server 400, and send out alarm information and positioning information when a signal is abnormal.
Preferably, the monitoring terminal further comprises a mobile terminal App500, the mobile terminal App communicates with the cloud server 400 through a network, and the processing and analyzing result of the cloud server 400 can also be directly sent to the mobile terminal App500, so that the monitoring terminal is convenient for people to check at any time and any place.
The utility model discloses in the above-mentioned embodiment, disclose a transformer partial discharge thing networking monitoring devices utilizes ultrasonic wave monitoring and the combination of earth electric wave monitoring technology, has promoted monitoring signal's stability and accuracy and can in time report to the police and fix a position, and it is more convenient to acquire partial discharge information, has improved the security of electric power operation.
The partial discharge of the transformer is monitored on line, so that possible defects or performance degradation in the transformer can be found in advance, reliable judgment is provided for maintenance, and power supply reliability and economy are improved; the partial discharge monitoring system is used for on-line monitoring, the running state of the transformer can be known at any time, the maintenance cost of the transformer is greatly reduced, data transmission is carried out through the Internet of things, the safety and operability of the system are enhanced, and along with the development of Chinese economy, the on-line monitoring system of the power equipment is necessarily the first choice for future power grid equipment detection.
The on-line partial discharge monitoring technology of the transformer researches state information of the transformer in operation or under a relative static condition by means of modern testing, monitoring, computer analysis and the like, analyzes the technical state of equipment, diagnoses the nature and the cause of the fault, predicts the fault trend and further determines necessary countermeasures. By utilizing the technology, the fault symptoms and reasons can be found early, the early elimination of faults and potential safety hazards is facilitated, the power failure time is shortened, the power supply reliability is improved, and unnecessary loss is avoided, so that the method has very high economic and social benefits.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (5)
1. The utility model provides a transformer partial discharge thing networking monitoring devices which characterized in that includes:
the signal acquisition module (200) is installed in the transformer (100), and the signal acquisition module (200) is connected with the ultrasonic sensor and the earth electric wave sensor and is used for acquiring ultrasonic signals and earth electric wave signals in the transformer (100); and
the monitoring terminal is communicated with the signal acquisition module (200) through the Internet of things (300) and used for receiving the signals output by the signal acquisition module (200), analyzing and processing the signals and sending alarm information and positioning information outwards when the signals are abnormal.
2. The monitoring device for the partial discharge of the transformer through the internet of things as claimed in claim 1, wherein the ultrasonic sensor and the earth electric wave sensor are connected with the signal acquisition module (200) through shielded cables, and probe ends of the ultrasonic sensor and the earth electric wave sensor are arranged on the surface of a shell of the transformer (100).
3. The transformer partial discharge internet of things monitoring device according to claim 1 or 2, wherein the monitoring terminal comprises:
the cloud server (400) is communicated with the signal acquisition module (200) through the Internet of things (300), and is used for receiving the signals output by the signal acquisition module (200) and analyzing and processing the signals; and
and the operation and maintenance monitoring center (600) is communicated with the cloud server (400) and is used for receiving the processing result of the cloud server (400) and sending alarm information and positioning information outwards when the signal is abnormal.
4. The transformer partial discharge internet of things monitoring device according to claim 3, wherein the monitoring terminal further comprises a mobile terminal App (500), and the mobile terminal App (500) is in communication with the cloud server (400) through a network.
5. The transformer partial discharge internet of things monitoring device according to claim 1, wherein the frequency range of the ultrasonic signals collected by the ultrasonic sensor is 20 KHz-200KHz, and the frequency range of the earth electric wave signals collected by the earth electric wave sensor is 3 MHz-100 MHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021413118.4U CN212622907U (en) | 2020-07-17 | 2020-07-17 | Transformer partial discharge thing networking monitoring devices |
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| CN202021413118.4U CN212622907U (en) | 2020-07-17 | 2020-07-17 | Transformer partial discharge thing networking monitoring devices |
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| CN212622907U true CN212622907U (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325155A (en) * | 2021-11-19 | 2022-04-12 | 国网湖南省电力有限公司 | Fault detection system for transformer |
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