CN219589840U - Transformer temperature monitoring system based on optical fiber sensing technology - Google Patents
Transformer temperature monitoring system based on optical fiber sensing technology Download PDFInfo
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- CN219589840U CN219589840U CN202320269835.1U CN202320269835U CN219589840U CN 219589840 U CN219589840 U CN 219589840U CN 202320269835 U CN202320269835 U CN 202320269835U CN 219589840 U CN219589840 U CN 219589840U
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Abstract
The utility model discloses a transformer temperature monitoring system based on an optical fiber sensing technology, which comprises an ASE light source, an optical circulator, an optical switch, an OPM demodulator, a main control board and an optical fiber temperature sensor, wherein the ASE light source is connected with the optical circulator; the optical circulator comprises an optical input port, an optical bidirectional port and an optical output port; the optical input port is connected with an ASE light source; the optical switch is provided with a public end and a plurality of gating ends; the optical bidirectional port is connected with the public end of the optical switch; the optical output port is connected with the OPM demodulator; the output of the OPM demodulator is connected with the main control board; a plurality of optical fiber temperature sensors connected in series are arranged in each transformer, and one end of each optical fiber temperature sensor connected in series is connected to one gating end of the optical switch through an optical cable; the optical fiber temperature sensors are optical fiber Bragg grating sensors, and each optical fiber temperature sensor has different center wavelengths. The system has the characteristics of good reliability, electromagnetic interference resistance, small size, light weight, corrosion resistance, long-distance transmission and multiplexing and the like.
Description
Technical Field
The utility model relates to the field of power equipment, in particular to a transformer temperature monitoring system based on an optical fiber sensing technology.
Background
Temperature is an important parameter of the operating state of a transformer, which is a constant concern for workers during operation of the transformer. In measurement, the key points of temperature measurement are not one point, but a plurality of points, and in order to obtain complete information of the temperature distribution of the transformer, a multi-point quasi-distributed sensing measurement system is generally adopted.
Optical fiber sensors, particularly Fiber Bragg Grating (FBG) sensors, are being used in a great deal in modern life, and compared with electronic sensors, optical fiber sensors are resistant to lightning strikes, are good in reliability, are resistant to electromagnetic interference, are small in size, are light in weight, are corrosion-resistant, can be transmitted remotely, and can be multiplexed.
Disclosure of Invention
The utility model aims to provide a transformer temperature monitoring system based on an optical fiber sensing technology so as to finish multi-distribution quasi-distributed temperature measurement of a transformer. The specific scheme is as follows:
a transformer temperature monitoring system based on an optical fiber sensing technology comprises an ASE light source, an optical circulator, an optical switch, an OPM demodulator, a main control board and an optical fiber temperature sensor;
the optical circulator comprises an optical input port, an optical bidirectional port and an optical output port; the optical input port is connected with the ASE light source; the optical switch is provided with a public end and a plurality of gating ends; the optical bidirectional port is connected with the public end of the optical switch; the optical output port is connected with the OPM demodulator; the output of the OPM demodulator is connected with the main control board;
a plurality of optical fiber temperature sensors are arranged in each transformer, the optical fiber temperature sensors are connected in series in each transformer, and one end of each optical fiber temperature sensor in series is connected to one gating end of the optical switch through an optical cable;
the optical fiber temperature sensors are optical fiber Bragg grating sensors, and each optical fiber temperature sensor has different center wavelengths.
Further, the optical switch is an electro-optical switch.
Further, the optical fiber temperature sensors are connected in a fusion mode.
Further, the optical fiber temperature sensor is connected with the optical cable in a fusion mode.
Further, the transformer temperature monitoring system further comprises a data communication module and an upper computer, and the main control board is in communication connection with the upper computer through the data communication module.
Further, the data communication module is a mobile data communication module.
The utility model realizes the following technical effects:
the transformer temperature monitoring system is a quasi-distributed sensing measurement system based on an optical fiber sensing technology, and has the characteristics of good reliability, electromagnetic interference resistance, small size, light weight, corrosion resistance, long-distance transmission and multiplexing and the like.
Drawings
FIG. 1 is a system block diagram of a transformer temperature monitoring system based on fiber optic sensing technology of the present utility model;
fig. 2 is a control circuit diagram example of the electro-optical switch of the present utility model.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
As shown in fig. 1, the utility model provides a transformer temperature monitoring system based on an optical fiber sensing technology, which comprises an ASE (amplified spontaneous emission) light source, an optical circulator, an optical switch, an OFM demodulator, a main control board, a GPRS (general packet radio service) and other mobile data communication modules which are arranged in a control box, an optical fiber temperature sensor arranged in a transformer (front end to be measured) and a remote server (upper computer) arranged in a remote monitoring center.
The optical circulator comprises an optical input port, an optical bidirectional port and an optical output port, wherein the optical input port is connected with an ASE light source; the optical bidirectional port is connected with the public end of the optical switch; the optical output port is connected to an OPM demodulator. The output of the OPM demodulator is connected with the main control board, and the main control board receives the result output by the OPM demodulator and uploads the result to the remote server through the mobile communication module such as GPRS. And analyzing and processing the uploaded data by a remote server to obtain the temperature information of the transformer.
In each transformer, the optical fiber temperature sensors are connected in series, and after the series connection, one end of each optical fiber temperature sensor is connected to one gating end of the optical switch through an optical cable.
Introduction of the components and parts in the system:
the ASE light source is an optical signal emitting end of the whole monitoring system, and emits broadband light to be transmitted to each optical fiber temperature sensor through an optical cable and various optical devices.
An optical circulator is a device that performs irreversible transmission of light, and guides reverse transmission light, spatially separates it from forward transmission light, and outputs it from another port.
The optical switch is a device capable of switching optical fiber lines, and the monitoring system is used for realizing time-sharing transmission between different transformers and the main control board and realizing the function of monitoring a plurality of areas by an embedded main control board, for example, a No. 1 gating port of the optical switch is connected with an optical fiber temperature sensor of one set of transformers, and a No. 2 gating port is connected with an optical fiber temperature sensor of the other set of transformers.
The optical fiber temperature sensors are arranged at the front end, the quantity can be increased according to actual demands, but the central wavelength bandwidths of the reflected lights of the optical fiber temperature sensors corresponding to the output of each optical switch cannot be overlapped, and proper intervals are needed to distinguish the signals of the sensors.
In this embodiment, in order to ensure the reliability of the series connection of the optical fiber temperature sensors in the transformer, the optical fiber temperature sensors are welded together.
In this embodiment, in order to ensure the connection reliability between the optical fiber temperature sensor and the optical cable in the transformer, the optical fiber temperature sensor and the optical cable are connected by fusion.
The OPM demodulator is used to demodulate the optical signal into an electrical signal, and its demodulation range should be able to include the corresponding wavelengths of all the fiber optic temperature sensors, i.e. to coincide with the optical signal bandwidth of the ASE light source.
The embedded main control board is used for carrying out preliminary processing on the electric signals, and sending the initial data to the remote server through the interface by the data transmission module such as GPRS, etc., so as to realize remote monitoring.
Two sets of transformers are shown schematically in fig. 1 for monitoring. The ASE light source emits light with a certain bandwidth (for example 1520-1620 nm), the light source is connected to the light input port of the optical circulator, the light source outputs from the light bidirectional port of the optical circulator, and the light circulation is switched to two sets of equipment through the optical switch, so that the time division multiplexing is realized. The optical fiber temperature sensors of each set of transformer are connected in series, incident light is reflected by the optical fiber temperature sensors, enters the OPM demodulator through the optical switch, the optical bidirectional port and the optical output port of the optical circulator to be demodulated into an electric signal, is subjected to preliminary processing by the main control board, and then transmits original data to the remote server through the GPRS and other data transmission modules, so that remote monitoring is realized. The calculation and display of the raw data is performed by a remote server.
The optical switch is used for realizing time division multiplexing of optical fiber sensing monitoring, namely transmitting optical signals on different optical paths in different time. In this embodiment, a 1X4 optical switch (25:25:25:25) may be used, and only two of the two paths are used, corresponding to two sets of transformers respectively. Fig. 2 shows a driving circuit diagram of an electro-optical switch. The microcontroller is connected with each gating pin of the electro-optical switch through the driving chip, and the switching of the optical path is realized by setting the level of the gating pin. The electro-optical switch has the characteristics of small size, convenient control and the like.
The OFM demodulator can accurately monitor the wavelength of the outgoing light. The use is simple and convenient, and the reading of the wavelength can be completed only by the read-write operation of the microcontroller.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. The transformer temperature monitoring system based on the optical fiber sensing technology is characterized by comprising an ASE light source, an optical circulator, an optical switch, an OPM demodulator, a main control board and an optical fiber temperature sensor;
the optical circulator comprises an optical input port, an optical bidirectional port and an optical output port; the optical input port is connected with the ASE light source; the optical switch is provided with a public end and a plurality of gating ends; the optical bidirectional port is connected with the public end of the optical switch; the optical output port is connected with the OPM demodulator; the output of the OPM demodulator is connected with the main control board;
a plurality of optical fiber temperature sensors are arranged in each transformer, the optical fiber temperature sensors are connected in series in each transformer, and one end of each optical fiber temperature sensor in series is connected to one gating end of the optical switch through an optical cable;
the optical fiber temperature sensors are optical fiber Bragg grating sensors, and each optical fiber temperature sensor has different center wavelengths.
2. The transformer temperature monitoring system based on fiber optic sensing technology of claim 1, wherein the optical switch is an electro-optic optical switch.
3. The transformer temperature monitoring system based on the optical fiber sensing technology as claimed in claim 1, wherein the optical fiber temperature sensors are connected by fusion.
4. The transformer temperature monitoring system based on the optical fiber sensing technology according to claim 1, wherein the optical fiber temperature sensor and the optical cable are connected in a fusion manner.
5. The transformer temperature monitoring system based on the optical fiber sensing technology according to claim 1, further comprising a data communication module and an upper computer, wherein the main control board is in communication connection with the upper computer through the data communication module.
6. The system of claim 5, wherein the data communication module is a mobile data communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320269835.1U CN219589840U (en) | 2023-02-21 | 2023-02-21 | Transformer temperature monitoring system based on optical fiber sensing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320269835.1U CN219589840U (en) | 2023-02-21 | 2023-02-21 | Transformer temperature monitoring system based on optical fiber sensing technology |
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| CN219589840U true CN219589840U (en) | 2023-08-25 |
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| CN202320269835.1U Active CN219589840U (en) | 2023-02-21 | 2023-02-21 | Transformer temperature monitoring system based on optical fiber sensing technology |
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- 2023-02-21 CN CN202320269835.1U patent/CN219589840U/en active Active
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