CN117783956A - Transformer abnormality detection system and sensor - Google Patents
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- CN117783956A CN117783956A CN202410010977.5A CN202410010977A CN117783956A CN 117783956 A CN117783956 A CN 117783956A CN 202410010977 A CN202410010977 A CN 202410010977A CN 117783956 A CN117783956 A CN 117783956A
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Abstract
The application discloses abnormal detection system and sensor of transformer, this system includes: the device comprises an optical fiber laser, an optical fiber polarizer, a sensor, a receiving module and a calculating module; the fiber laser is used for generating first laser and emitting the first laser into the fiber polarizer; the optical fiber polarizer is used for converting the received laser into second laser with the target polarization direction and transmitting the second laser to the sensor; the sensor is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested; the receiving module is used for receiving third laser in the target polarization direction, wherein the third laser is laser reflected by the sensor; and the calculation module is used for judging whether the transformer to be tested is abnormal or not based on the information of the second laser and the third laser. Therefore, the magnetic field change of the transformer can be accurately detected, and whether the transformer is abnormal or not can be accurately and rapidly judged.
Description
Technical Field
The invention relates to the technical field of transformer magnetic field measurement, in particular to a transformer abnormality detection system and a sensor.
Background
Transformers are very important devices in power systems, responsible for the transmission and distribution of electrical energy. The magnetic field generated by the transformer can be used as an important index for normal operation of the transformer. Most faults of the transformer are caused by hostile barriers in windings and terminals of the transformer, and the faults can be detected through magnetic field changes generated by the transformer, but because a main magnetic circuit of the transformer is an iron core, measurement is performed outside a shell of the transformer, and the oil environment and the shell of the transformer cannot be accurately measured after the oil environment and the shell pass through the transformer, so that how to detect whether the transformer is abnormal or not becomes a problem to be solved in the prior art.
Disclosure of Invention
Therefore, the present invention is directed to a transformer abnormality detection system and a sensor, which can overcome the problem that whether the transformer is abnormal or not cannot be accurately detected at present.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides a transformer abnormality detection system, including: the device comprises an optical fiber laser, an optical fiber polarizer, a sensor, a receiving module and a calculating module;
the optical fiber laser is used for generating first laser and transmitting the first laser into the optical fiber polarizer; the optical fiber polarizer is used for converting the received laser into second laser with a target polarization direction and transmitting the second laser into the sensor;
the sensor is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested;
the receiving module is used for receiving third laser in the target polarization direction, wherein the third laser is laser reflected by the sensor;
the calculation module is used for determining magnetic field state information of the transformer to be tested based on the information of the second laser and the third laser, and judging whether the transformer to be tested is abnormal or not based on the magnetic field state information.
Further, the sensor includes: the device comprises a transmission module, a Faraday magneto-optical effect material and a laser reflecting layer;
the transmission module is used for transmitting incident laser to the Faraday magneto-optical effect material;
the Faraday magneto-optical effect material is used for changing the polarization direction of at least part of received laser based on the magnetic field inside the transformer to be tested;
the laser reflecting layer is used for reflecting the laser passing through the Faraday magneto-optical effect material.
Further, the transmission module, the Faraday magneto-optical effect material and the laser reflecting layer are sequentially arranged;
the laser reflected by the laser reflecting layer is emitted through the Faraday magneto-optical effect material and the transmission module.
Further, the transmission module includes: an optical fiber cladding and a core surrounded by the optical fiber cladding.
Further, the method further comprises the following steps: an optical fiber circulator;
the optical fiber circulator is provided with a first port, a second port and a third port;
the optical fiber circulator is used for receiving the laser emitted by the optical fiber polarizer through the first port and transmitting the laser received by the first port to the sensor through the second port;
the optical fiber circulator is also used for receiving the laser reflected by the sensor through the second port and transmitting the laser received by the second port to the receiving module through the third port.
Further, the receiving module comprises a polarized optical fiber and a light intensity detector;
the polarization optical fiber is used for receiving the laser output by the third port of the optical fiber circulator and transmitting the laser to the light intensity detector.
Further, the information of the second laser includes light intensity of the second laser emitted by the optical fiber polarizer, and the information of the third laser includes the third laser in the target polarization direction received by the receiving module.
Further, the determining the magnetic field state information of the transformer to be measured based on the information of the second laser and the third laser includes:
determining an angle of change of the polarization direction of the laser of the transformer to be tested in the Faraday magneto-optical effect material based on the information of the second laser and the third laser and a preset formula;
determining magnetic field state information of the transformer to be tested based on the angle of polarization direction change in the Faraday magneto-optical effect material;
wherein, the preset formula is:
iin is the light intensity of the second laser emitted by the optical fiber polarizer; iout is the third laser of the target polarization direction received by the receiving module; η is the system laser loss; gamma is the reflectivity of the laser reflecting layer; θ is the angle at which the polarization direction of the laser light changes in the faraday magneto-optical effect material.
Further, the information of the second laser includes power of the second laser emitted by the optical fiber polarizer, and the information of the third laser includes power of the third laser in the target polarization direction received by the receiving module.
In a second aspect, embodiments of the present application further provide a sensor, including: the device comprises a transmission module, a Faraday magneto-optical effect material and a laser reflecting layer;
the transmission module is used for transmitting incident laser to the Faraday magneto-optical effect material;
the Faraday magneto-optical effect material is used for changing the polarization direction of at least part of received laser based on the magnetic field inside the transformer to be tested;
the laser reflecting layer is used for reflecting the laser passing through the Faraday magneto-optical effect material.
The invention provides a transformer abnormality detection system, comprising: the device comprises an optical fiber laser, an optical fiber polarizer, a sensor, a receiving module and a calculating module; the fiber laser is used for generating first laser and emitting the first laser into the fiber polarizer; the optical fiber polarizer is used for converting the received laser into second laser with the target polarization direction and transmitting the second laser to the sensor; the sensor is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested; the receiving module is used for receiving third laser in the target polarization direction, wherein the third laser is laser reflected by the sensor; and the calculation module is used for determining the magnetic field state information of the transformer to be tested based on the information of the second laser and the third laser and judging whether the transformer to be tested is abnormal or not based on the magnetic field state information. Therefore, the magnetic field change of the transformer can be accurately detected, whether the operation of the transformer is abnormal or not is determined based on the magnetic field change of the transformer, and whether the transformer is abnormal or not is accurately and rapidly judged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a transformer abnormality detection system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a transformer abnormality detection system according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a sensor in a transformer abnormality detection system according to another embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Fig. 1 is a schematic structural diagram of a transformer abnormality detection system provided in an embodiment of the present application, and as shown in fig. 1, the transformer abnormality detection system provided in an embodiment of the present application may at least include: the optical fiber polarizer comprises an optical fiber laser 1, an optical fiber polarizer 2, a sensor 3, a receiving module 4 and a calculating module 5;
the fiber laser 1 is used for generating first laser and emitting the first laser into the fiber polarizer 2; the optical fiber polarizer 2 is used for converting the received laser into second laser with a target polarization direction and transmitting the second laser into the sensor 3; the sensor 3 is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested; the receiving module 4 is configured to receive a third laser light in the target polarization direction, where the third laser light is a laser light reflected by the sensor 3; the calculating module 5 is configured to determine magnetic field state information of the transformer to be measured based on information of the second laser and the third laser, and determine whether the transformer to be measured is abnormal based on the magnetic field state information.
Specifically, the fiber laser 1 generates and emits a first laser light, the first laser light passes through the fiber polarizer 2, and the fiber polarizer 2 changes the first laser light emitted from the fiber laser into a second laser light having a target polarization direction, for example, a polarization direction S.
The second laser light reaches the sensor 3, and the sensor 3 is internally provided with a specific magneto-optical effect and a reflective material, so that the polarization direction of at least part of the second laser light entering the sensor 3 can be changed, and all the laser light entering the sensor 3 (including the second laser light with the polarization direction unchanged and the third laser light with the polarization direction changed) can be reflected to the receiving module 4.
The receiving module 4 only receives or only allows the laser light with a specific polarization direction to pass through, for example, the laser light with the same polarization direction as the second laser light, so that the information of the second laser light and the information of the third laser light with the polarization direction same as the polarization direction of the second laser light received by the receiving module 4 can be determined based on the emission power of the fiber laser, etc., and the change of the second laser light after entering the sensor 3 is obtained. The change of the second laser after entering the sensor 3 depends on the magnetic field of the sensor 3, so that in actual detection, the sensor 3 is only required to be arranged inside the transformer to be detected, and the transmission directions of the first laser, the second laser and the third laser are correspondingly adjusted (certainly, the transmission directions of the first laser, the second laser and the third laser can be determined when the detection system is designed, so that the three laser can be directly used later), and then the state information of the magnetic field inside the transformer to be detected can be calculated through the calculation module 5, so that the state information of the magnetic field is more improved, and whether the transformer operates abnormally or not is determined.
It should be noted that, when determining whether the transformer to be tested is abnormal based on the magnetic field state information inside the transformer to be tested detected in real time, the magnetic field state information in the normal state of the transformer to be tested may be recorded when the transformer to be tested is normal, so as to compare with the magnetic field state information detected in real time subsequently, and if the difference value of the magnetic field state information and the magnetic field state information is different or exceeds the preset range, determine that the transformer to be tested is abnormal; and if the two are the same or the difference value does not exceed the preset range, determining that the transformer to be tested is normal in operation. Or in some embodiments of the application, a standard threshold value, such as information of magnetic flux, can be determined through early detection calculation, the real-time detected magnetic field state information is converted into a corresponding value, and then comparison is performed to determine whether the transformer to be tested is abnormal in operation.
The invention provides a transformer abnormality detection system, comprising: the device comprises an optical fiber laser, an optical fiber polarizer, a sensor, a receiving module and a calculating module; the fiber laser is used for generating first laser and emitting the first laser into the fiber polarizer; the optical fiber polarizer is used for converting the received laser into second laser with the target polarization direction and transmitting the second laser to the sensor; the sensor is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested; the receiving module is used for receiving third laser in the target polarization direction, wherein the third laser is laser reflected by the sensor; and the calculation module is used for determining the magnetic field state information of the transformer to be tested based on the information of the second laser and the third laser and judging whether the transformer to be tested is abnormal or not based on the magnetic field state information. Therefore, the magnetic field change of the transformer can be accurately detected, whether the operation of the transformer is abnormal or not is determined based on the magnetic field change of the transformer, and whether the transformer is abnormal or not is accurately and rapidly judged.
Fig. 2 is a schematic structural diagram of a transformer abnormality detection system according to another embodiment of the present application, as shown in fig. 2 (solid arrows in fig. 2 are incident laser light for the sensor 3, and dotted arrows are outgoing laser light for the sensor 3), where in some embodiments of the present application, the transformer abnormality detection system may further include: and a fiber circulator 6.
The optical fiber circulator 6 is provided with a first port A, a second port B and a third port C; the optical fiber circulator 6 is used for receiving the laser emitted by the optical fiber polarizer 2 through the first port A and transmitting the laser received by the first port A to the sensor 3 through the second port B; the optical fiber circulator 6 is further configured to receive the laser light reflected by the sensor 3 through the second port B, and transmit the laser light received by the second port B to the receiving module 4 through the third port C.
Specifically, the laser light such as the second laser light is emitted from the second port B through the first port a of the optical fiber circulator 6, and enters the sensor 3 after being emitted; the sensor 3 is in the magnetic field generated by the transformer to be measured, and the laser entering the sensor 3 changes the polarization direction based on the magnetic field condition under the action of the material inside the transformer 3, and is reflected by the sensor 2 back to the second port B of the fiber circulator 6 and is emitted from the third port C.
Further, the receiving module 3 comprises a polarizing fiber 41 and a light intensity detector 42.
In practical applications, the laser light (i.e., the third laser light) exiting the third port C of the fiber optic circulator 6 passes through the polarizing fiber 41, and the polarizing fiber 41 only allows the third laser light with the target polarization direction to pass through and be transmitted to the light intensity detector 42.
Fig. 3 is a schematic structural diagram of a sensor in a transformer abnormality detection system according to another embodiment of the present application, as shown in fig. 3, in some embodiments of the present application, the sensor 3 specifically includes: a transmission module 31, a faraday magneto-optical effect material 32 and a laser reflection layer 33.
The transmission module 31 is used for transmitting incident laser light into the Faraday magneto-optical effect material 32; the faraday-magneto-optical effect material 32 is used for changing the polarization direction of at least part of the received laser light based on the magnetic field inside the transformer to be measured; the laser reflection layer 33 is for reflecting the laser light passing through the faraday-magnetic optical effect material 32. Thus, the magnetic field generated by the transformer to be tested can be accurately sensed by the Faraday magneto-optical effect material 32, so that the polarization direction of the transmitted laser is changed, and the detection precision is improved.
It should be noted that, in some embodiments of the present application, the transmission module 31, the faraday magneto-optical effect material 32 and the laser reflection layer 33 are sequentially disposed, so that the laser incident to the sensor sequentially passes through the transmission module 31, the faraday magneto-optical effect material 32, the laser reflection layer 33, the faraday magneto-optical effect material 32 and the transmission module 31 and then is emitted. That is, after the incident laser enters the faraday magneto-optical effect material 32 through the transmission module 31, the polarization direction of the laser is changed according to the intensity and direction of the magnetic field of the faraday magneto-optical effect material 32, the laser is reflected after the first time passes through the faraday magneto-optical effect material 32 and reaches the laser reflecting layer 33, and the polarization direction of the laser is changed in the second time passes through the faraday magneto-optical effect material 32 and the second time passes through the faraday magneto-optical effect material 32. Thus, the laser passes through the Faraday magneto-optical effect material 32 twice, so that the change of the polarization direction of the laser can be enhanced, and the subsequent detection is facilitated.
It should be noted that, when the magnetic field generated by the transformer to be tested is unchanged, the same angle is changed twice. But because the magnetic field in the transformer is changing, the two changes are not exactly the same.
Further, in other embodiments of the present application, the transmission module 31 may include: an optical fiber cladding 311 and a core 312 surrounded by the optical fiber cladding 311.
Further, in the embodiment of the present application, the information of the second laser light includes the light intensity of the second laser light emitted by the optical fiber polarizer 2, and the information of the third laser light includes the third laser light of the target polarization direction received by the receiving module 4.
On the basis, the magnetic field state information of the transformer to be measured is determined based on the information of the second laser and the third laser, which is mentioned in the above embodiment, and the method comprises the following steps: firstly, determining the angle of polarization direction change of the laser of the transformer to be tested in the Faraday magneto-optical effect material based on the information of the second laser and the third laser and a preset formula; and then determining the magnetic field state information of the transformer to be tested based on the angle of polarization direction change in the Faraday magneto-optical effect material.
Wherein, the preset formula is:
in this formula, iin is the light intensity of the second laser light emitted from the optical fiber polarizer 2; iout is the third laser light of the target polarization direction received by the receiving module 4; η is the transmission coupling loss of the system laser; gamma is the reflectivity of the laser reflecting layer; θ is the angle at which the polarization direction of the laser light changes in the faraday magneto-optical effect material.
The system laser transmission coupling loss is the sum of all transmission loss, coupling loss and other loss in the system, and the whole system loss is generally measured directly after the system is manufactured. The specific method comprises the following steps:
the direction and the intensity of a magnetic field are determined through calculation, and the formula is as follows: θ=vbl, θ being the angle of deflection; v is the Fisher constant; b the component of the magnetic induction in the direction of light propagation; l is the length of the laser passing through the magneto-optical material.
Under the magnetic field, the angle of the laser passing through the Faraday magneto-optical material is changed to 90 degrees each time, and the angle is changed to 180 degrees after the laser passes through the Faraday magneto-optical material twice, so that the polarization direction is changed to be the same as the original polarization direction. At this time, the ratio of the intensities of the outgoing laser light and the incoming laser light is measured, which is the total loss of the system, wherein the total loss of the system also includes the reflectance γ of the laser reflection layer, and η can be obtained by dividing the total loss by γ.
Thus, based on the above formula, under the condition that other parameters of the detection system are unchanged, both eta and gamma are constant values, so that the incident second laser intensity I in With the intensity I of the outgoing (i.e. detected) laser light out The ratio is related only to the angle θ of the change in the polarization direction of the laser light in the faraday magneto-optical effect material, and the angle is related only to the change in the direction and magnitude of the magnetic field of the environment in which the sensor is located. Thus can pass throughI in And I out The ratio characterizes the magnetic field change in the transformer to be tested, and further determines the running state of the transformer to be tested.
In practical application, the above I in And I out Or by monitoring the ratio of the second laser power emitted from the optical fiber polarizer 2 to the third laser power received by the final receiving module 4, thereby increasing the operability of the system.
Based on the same inventive concept, the present application further provides a sensor applied to the above detection system, where the sensor specifically may include: the device comprises a transmission module, a Faraday magneto-optical effect material and a laser reflecting layer;
the transmission module is used for transmitting the incident laser to the Faraday magneto-optical effect material; the Faraday magneto-optical effect material is used for changing the polarization direction of at least part of received laser based on the magnetic field inside the transformer to be measured; the laser reflecting layer is used for reflecting the laser passing through the Faraday magneto-optical effect material.
The specific manner in which the various modules perform the operations in relation to the sensors of the above embodiments have been described in detail in relation to the embodiments of the detection system and will not be described in detail herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A transformer anomaly detection system, comprising: the device comprises an optical fiber laser, an optical fiber polarizer, a sensor, a receiving module and a calculating module;
the optical fiber laser is used for generating first laser and transmitting the first laser into the optical fiber polarizer; the optical fiber polarizer is used for converting the received laser into second laser with a target polarization direction and transmitting the second laser into the sensor;
the sensor is arranged in the transformer to be tested, and is used for changing the polarization direction of at least part of received laser based on the magnetic field in the transformer to be tested and reflecting all the laser in the transformer to be tested;
the receiving module is used for receiving third laser in the target polarization direction, wherein the third laser is laser reflected by the sensor;
the calculation module is used for determining magnetic field state information of the transformer to be tested based on the information of the second laser and the third laser, and judging whether the transformer to be tested is abnormal or not based on the magnetic field state information.
2. The transformer anomaly detection system of claim 1, wherein the sensor comprises: the device comprises a transmission module, a Faraday magneto-optical effect material and a laser reflecting layer;
the transmission module is used for transmitting incident laser to the Faraday magneto-optical effect material;
the Faraday magneto-optical effect material is used for changing the polarization direction of at least part of received laser based on the magnetic field inside the transformer to be tested;
the laser reflecting layer is used for reflecting the laser passing through the Faraday magneto-optical effect material.
3. The transformer anomaly detection system of claim 2, wherein the transmission module, faraday magneto-optical effect material, and laser reflection layer are disposed in sequence;
the laser reflected by the laser reflecting layer is emitted through the Faraday magneto-optical effect material and the transmission module.
4. A transformer anomaly detection system according to claim 3, wherein the transmission module comprises: an optical fiber cladding and a core surrounded by the optical fiber cladding.
5. The transformer anomaly detection system of claim 2, further comprising: an optical fiber circulator;
the optical fiber circulator is provided with a first port, a second port and a third port;
the optical fiber circulator is used for receiving the laser emitted by the optical fiber polarizer through the first port and transmitting the laser received by the first port to the sensor through the second port;
the optical fiber circulator is also used for receiving the laser reflected by the sensor through the second port and transmitting the laser received by the second port to the receiving module through the third port.
6. The transformer anomaly detection system of claim 5, wherein the receiving module comprises a polarizing fiber and a light intensity detector;
the polarization optical fiber is used for receiving the laser output by the third port of the optical fiber circulator and transmitting the laser to the light intensity detector.
7. The transformer anomaly detection system of claim 6, wherein the information of the second laser includes a light intensity of the second laser light emitted by the fiber polarizer, and the information of the third laser light includes a third laser light of the target polarization direction received by the receiving module.
8. The transformer anomaly detection system of claim 7, wherein the determining magnetic field status information of the transformer under test based on information of the second laser and the third laser comprises:
determining an angle of change of the polarization direction of the laser of the transformer to be tested in the Faraday magneto-optical effect material based on the information of the second laser and the third laser and a preset formula;
determining magnetic field state information of the transformer to be tested based on the angle of polarization direction change in the Faraday magneto-optical effect material;
wherein, the preset formula is:
wherein I is in The light intensity of the second laser emitted by the optical fiber polarizer; i out A third laser light of the target polarization direction received by the receiving module; η is the system laser loss; gamma is the reflectivity of the laser reflecting layer; θ is the angle at which the polarization direction of the laser light changes in the faraday magneto-optical effect material.
9. The transformer anomaly detection system of claim 1, wherein the information of the second laser includes a power of the second laser emitted by the fiber polarizer, and the information of the third laser includes a power of the third laser in the target polarization direction received by the receiving module.
10. A sensor, comprising: the device comprises a transmission module, a Faraday magneto-optical effect material and a laser reflecting layer;
the transmission module is used for transmitting incident laser to the Faraday magneto-optical effect material;
the Faraday magneto-optical effect material is used for changing the polarization direction of at least part of received laser based on the magnetic field inside the transformer to be tested;
the laser reflecting layer is used for reflecting the laser passing through the Faraday magneto-optical effect material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410010977.5A CN117783956A (en) | 2024-01-03 | 2024-01-03 | Transformer abnormality detection system and sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410010977.5A CN117783956A (en) | 2024-01-03 | 2024-01-03 | Transformer abnormality detection system and sensor |
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| CN117783956A true CN117783956A (en) | 2024-03-29 |
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| CN202410010977.5A Pending CN117783956A (en) | 2024-01-03 | 2024-01-03 | Transformer abnormality detection system and sensor |
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