CN204944663U - The transformer winding vibration measurement mechanism that transformer Intruding wave causes - Google Patents
The transformer winding vibration measurement mechanism that transformer Intruding wave causes Download PDFInfo
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- CN204944663U CN204944663U CN201520527718.6U CN201520527718U CN204944663U CN 204944663 U CN204944663 U CN 204944663U CN 201520527718 U CN201520527718 U CN 201520527718U CN 204944663 U CN204944663 U CN 204944663U
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- bragg grating
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Abstract
The utility model relates to the transformer winding vibration measurement mechanism that a kind of transformer Intruding wave causes, and comprising: wideband light source, circulator, several Fiber Bragg Grating FBGs, array waveguide grating and photodetector; Wideband light source connects circulator, and each Fiber Bragg Grating FBG connects successively, and circulator connects first Fiber Bragg Grating FBG, and array waveguide grating connects circulator and photodetector respectively, and photodetector is fixed in tested Transformer Winding; The broadband optical signal that wideband light source sends by being divided into multiple narrowband optical signal after circulator, and enters in Fiber Bragg Grating FBG respectively, after the reflection of Fiber Bragg Grating FBG, enters in array waveguide grating; Narrowband optical signal in photoelectric detector array waveguide grating, and be converted into corresponding voltage signal; The change of photoelectric detector recording voltage signal.The Vibration Condition of the Transformer Winding that the utility model records is not vulnerable to the impact of electromagnetic interference (EMI), and can measure the vibration signal of multiple spot simultaneously.
Description
Technical field
The utility model relates to technical field of electric power, particularly relates to the transformer winding vibration measurement mechanism that a kind of transformer Intruding wave causes.
Background technology
Grid equipment Frequent Accidents, wherein comprises in a large number without the sudden apparatus insulated accident of sign, and Intruding wave is cause one of apparatus insulated deterioration, the major reason causing sudden accident to the cumulative effect that converting equipment impacts.For the harm that accurate evaluation Intruding wave insulate to converting equipment, the risk that reduction equipment brings to electric power netting safe running without sign sudden accident, need in labs experimental study, rest in Exemplary insulative structured material Vibration Condition and insulation harm, insulating capacity decline situation under the percussive action of repetitious invasion ripple, obtain Intruding wave accumulation to apparatus insulated injuring rule.Therefore, need to measure the Vibration Condition of the Transformer Winding that transformer Intruding wave causes.
Traditional detects the transformer winding vibration signal that transformer Intruding wave causes, mainly contain two kinds, a kind of be adopt be piezoelectric transducer, piezoelectric sensing probe is coupled with tested Transformer Winding couplant, utilize direct piezo electric effect, convert the vibration signal received to voltage signal, and measure, thus reach the object detecting Vibration Condition.Another kind adopts Fiber Bragg Grating FBG (FiberBraggGrating, FBG) vibration survey, what light source adopted is narrow-band light source, adopts time-multiplexed mode, by adjusting the output wavelength of narrow-band light source, realize the vibration survey at multiple Fiber Bragg Grating FBG place;
The first technology above-mentioned, piezoelectric sensor is subject to electromagnetic interference (EMI), under the impact condition of Intruding wave, measurement result is very easily interfered, simultaneously due to the impact of the factor such as volume, quality, be difficult to use under the narrow and small environment of transformer, and detection sensitivity is not high enough, bring inconvenience to application.And for the second technology, the Vibration Condition caused for Transformer Winding Intruding wave is measured, the Intruding wave time is musec order, therefore, adopts time-multiplexed mode cannot grasp the Vibration Condition of all test points simultaneously.
Utility model content
Based on this, be necessary to be subject to electromagnetic interference (EMI) and the limited problem of test point for traditional detection method to the transformer winding vibration signal that transformer Intruding wave causes, the transformer winding vibration measurement mechanism that a kind of transformer Intruding wave causes is provided.
The transformer winding vibration measurement mechanism that transformer Intruding wave causes, comprising: wideband light source, circulator, several Fiber Bragg Grating FBGs, array waveguide grating and photodetector;
Described wideband light source connects described circulator, each Fiber Bragg Grating FBG connects successively, described circulator connects first Fiber Bragg Grating FBG, and described array waveguide grating connects circulator and photodetector respectively, and described photodetector is fixed in tested Transformer Winding;
The broadband optical signal that described wideband light source sends is by being divided into multiple narrowband optical signal after described circulator, and narrowband optical signal enters into each Fiber Bragg Grating FBG respectively; Narrowband optical signal, after the reflection of Fiber Bragg Grating FBG, enters in described array waveguide grating; Narrowband optical signal in array waveguide grating described in described photoelectric detector, and be converted into corresponding voltage signal; The change of described photoelectric detector recording voltage signal.
The transformer winding vibration measurement mechanism that above-mentioned transformer Intruding wave causes, the transformer winding vibration signal of measuring transformer Intruding wave initiation is carried out by introducing fiber grating, because the frequency of general electromagnetic radiation is more much lower than light wave, transmitting optical signal is not vulnerable to the impact of electromagnetic interference (EMI) in a fiber, therefore, the Vibration Condition of the Transformer Winding recorded is not vulnerable to the impact of electromagnetic interference (EMI), in addition, by adopting wideband light source, the broadband optical signal that wideband light source sends by circulator is divided into multiple narrowband optical signal, and be sent in each Fiber Bragg Grating FBG respectively, through the reflection of Fiber Bragg Grating FBG, the reflectance spectrum of narrowband optical signal presents multiple reflection wavelength, array waveguide grating array wavelength optimum configurations and Fiber Bragg Grating FBG reflectance spectrum part aliasing, after array waveguide grating, light signal carries out wavelength-division multiplex according to wavelength under the effect of wavelength division multiplexer, so just can by arranging multiple measurement grid region for different parameters on an optical fiber, realize measuring the vibration signal of the multiple test point of Transformer Winding.
Accompanying drawing explanation
Fig. 1 is the structural representation of the transformer winding vibration measurement mechanism of an embodiment;
Fig. 2 is the fundamental diagram that the transformer winding vibration measurement mechanism of Fig. 1 is corresponding;
Fig. 3 is the fundamental diagram of the transformer winding vibration measurement mechanism of another embodiment.
Embodiment
In order to further set forth the technological means that the utility model is taked and the effect obtained, below in conjunction with accompanying drawing and preferred embodiment, to the technical solution of the utility model, carry out clear and complete description.
As shown in Figure 1, it is the structural representation of the transformer winding vibration measurement mechanism of an embodiment, the transformer winding vibration measurement mechanism that transformer Intruding wave causes, comprising: wideband light source, circulator, several Fiber Bragg Grating FBGs, array waveguide grating and photodetector;
Described wideband light source connects described circulator, each Fiber Bragg Grating FBG connects successively, described circulator connects first Fiber Bragg Grating FBG, and described array waveguide grating connects circulator and photodetector respectively, and described photodetector is fixed in tested Transformer Winding;
The broadband optical signal that described wideband light source sends is by being divided into multiple narrowband optical signal after described circulator, and narrowband optical signal enters into each Fiber Bragg Grating FBG respectively; Narrowband optical signal, after the reflection of Fiber Bragg Grating FBG, enters in described array waveguide grating; Narrowband optical signal in array waveguide grating described in described photoelectric detector, and be converted into corresponding voltage signal; The change of described photoelectric detector recording voltage signal.
As shown in Figure 2, be the fundamental diagram that the transformer winding vibration measurement mechanism of Fig. 1 is corresponding, the broadband optical signal that wideband light source sends is by being divided into multiple narrowband optical signal after circulator, narrowband optical signal enters into Fiber Bragg Grating FBG respectively; Narrowband optical signal, after the reflection of several Fiber Bragg Grating FBGs, enters in array waveguide grating; Narrowband optical signal in photoelectric detector array waveguide grating, and be converted into corresponding voltage signal; The change of photoelectric detector recording voltage signal.
After Fiber Bragg Grating FBG receives the vibration signal of Transformer Winding, the wavelength of Fiber Bragg Grating FBG changes, and then initiation is changed by the luminous power of array waveguide grating, therefore, by the change of recording light electric explorer voltage signal, just can measure the vibration signal of Transformer Winding.
In array waveguide grating, the setting of array wavelength parameter and the reflectance spectrum of Fiber Bragg Grating FBG partly overlap, after array waveguide grating, narrowband optical signal is multiplexing according to wave-length division, voltage signal is converted to after photodetector, the change of voltage signal under photodetectors register, the change of voltage signal reflects the change of transformer winding vibration signal, thus achieves the measurement of the transformer winding vibration signal that transformer Intruding wave causes.
Due to the wavelength-division multiplex effect of the array waveguide grating in the utility model, for different parameters, same optical fiber can be arranged multiple measurement grid region, realize the monitoring of quasi-distributed real-time vibration signal; Owing to measuring multiple measurement point simultaneously, also further increase the measuring speed of the transformer winding vibration signal that transformer Intruding wave causes.
As an embodiment, Fiber Bragg Grating FBG and array waveguide grating can be placed on outside experiment hall, thus guarantee that measurement result can not be subject to the impact of transient state impact.
Wherein in an embodiment, the quantity of photodetector can also be multiple, each photodetector is fixed in a test point of tested Transformer Winding, for measuring the vibration signal in corresponding test point, thus achieve the synchro measure of the multiple vibration signal of Transformer Winding that transformer Intruding wave causes.
Wherein in an embodiment, the length of Fiber Bragg Grating FBG is the detection that the length of 12mm, 12mm is conducive to characteristic frequency ultrasonic signal.
Wherein in an embodiment, in order to ensure the vibration passing efficiency of the transformer winding vibration signal that transformer Intruding wave causes, Fiber Bragg Grating FBG pastes test point place corresponding to Transformer Winding by the mode of glue, it should be noted that, the stickup glue selected should be strain transfer glue and pastes should be as far as possible thin, make strain transfer efficiency higher, such as M-Bond610.
As shown in Figure 3, it is the fundamental diagram of the transformer winding vibration measurement mechanism of another embodiment, the transformer winding vibration measurement mechanism that transformer Intruding wave of the present utility model causes, can also comprise: be connected to the Hi-pass filter after photodetector, for eliminating the impact of the direct current biasing that temperature variation causes.
Usually, Transformer Winding is inevitably subject to the impact of temperature in the long-term course of work, the change of temperature can cause the change of direct current biasing, in order to DC-offset correction is on the impact of the measurement result of vibration signal, can access Hi-pass filter after photodetector.
Wherein in an embodiment, the transformer winding vibration measurement mechanism that transformer Intruding wave of the present utility model causes, can also comprise: be connected to the amplifier between photodetector and Hi-pass filter, for amplifying tested vibration signal.
Because the vibration of the Transformer Winding of transformer Intruding wave initiation is transient state process, amplifier can be accessed between photodetector and Hi-pass filter, the vibration signal of the tested Transformer Winding of further amplification, is convenient to carry out Measurement accuracy to the vibration signal of Transformer Winding.
The transformer winding vibration measurement mechanism of the transformer Intruding wave initiation of comprehensive the various embodiments described above, the transformer winding vibration signal of measuring transformer Intruding wave initiation is carried out by introducing fiber grating, because the frequency of general electromagnetic radiation is more much lower than light wave, transmitting optical signal is not vulnerable to the impact of electromagnetic interference (EMI) in a fiber, therefore, the Vibration Condition of the Transformer Winding recorded by the utility model is not vulnerable to the impact of electromagnetic interference (EMI), in addition, what the utility model adopted is wideband light source, the broadband optical signal sent by wideband light source by circulator is divided into multiple narrowband optical signal, and be sent in each Fiber Bragg Grating FBG respectively, after the reflection of multiple Fiber Bragg Grating FBG, the reflectance spectrum of narrowband optical signal presents multiple reflection wavelength, the array wavelength optimum configurations of array waveguide grating and the reflectance spectrum part aliasing of Fiber Bragg Grating FBG, after array waveguide grating, narrowband optical signal carries out wavelength-division multiplex according to wavelength under the effect of wavelength division multiplexer, so just can by arranging multiple measurement grid region for different parameters on an optical fiber, realize the monitoring of quasi-distributed real-time vibration signal, the quantity of photodetector can also be multiple, each photodetector is fixed in a test point of tested Transformer Winding, for measuring the vibration signal in this test point, owing to measuring multiple measurement point simultaneously, also further increase the measuring speed of the transformer winding vibration signal that transformer Intruding wave causes, Fiber Bragg Grating FBG pastes test point place corresponding to Transformer Winding by the mode of glue, guarantees the vibration passing efficiency of transformer winding vibration signal, be connected to the Hi-pass filter after photodetector, the impact of the direct current biasing that temperature variation causes can be eliminated, be connected to the amplifier between photodetector and Hi-pass filter, tested vibration signal can be amplified, be beneficial to the Measurement accuracy of the transformer winding vibration signal that transformer Intruding wave causes.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (7)
1. a transformer winding vibration measurement mechanism for transformer Intruding wave initiation, is characterized in that, comprising: wideband light source, circulator, several Fiber Bragg Grating FBGs, array waveguide grating and photodetector;
Described wideband light source connects described circulator, each Fiber Bragg Grating FBG connects successively, described circulator connects first Fiber Bragg Grating FBG, and described array waveguide grating connects circulator and photodetector respectively, and described photodetector is fixed in tested Transformer Winding;
The broadband optical signal that described wideband light source sends is by being divided into multiple narrowband optical signal after described circulator, and narrowband optical signal enters into each Fiber Bragg Grating FBG respectively; Narrowband optical signal, after the reflection of Fiber Bragg Grating FBG, enters in described array waveguide grating; Narrowband optical signal in array waveguide grating described in described photoelectric detector, and be converted into corresponding voltage signal; The change of described photoelectric detector recording voltage signal.
2. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 1, is characterized in that: described array waveguide grating is connected with described photodetector by wavelength division multiplexer.
3. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 1 and 2, it is characterized in that: the quantity of described photodetector is multiple, each photodetector is fixed in a test point of tested Transformer Winding, for measuring the vibration signal in corresponding test point.
4. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 1, is characterized in that: the length of described Fiber Bragg Grating FBG is 12mm.
5. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 1, is characterized in that: described Fiber Bragg Grating FBG pastes test point place corresponding in Transformer Winding by the mode of glue.
6. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 1, is characterized in that, also comprise: the Hi-pass filter connecting described photodetector, for eliminating the impact of the direct current biasing that temperature variation causes.
7. the transformer winding vibration measurement mechanism of transformer Intruding wave initiation according to claim 6, is characterized in that, also comprise: be connected to the amplifier between described photodetector and described Hi-pass filter, for amplifying tested vibration signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527718.6U CN204944663U (en) | 2015-07-20 | 2015-07-20 | The transformer winding vibration measurement mechanism that transformer Intruding wave causes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527718.6U CN204944663U (en) | 2015-07-20 | 2015-07-20 | The transformer winding vibration measurement mechanism that transformer Intruding wave causes |
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| CN204944663U true CN204944663U (en) | 2016-01-06 |
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| CN201520527718.6U Expired - Fee Related CN204944663U (en) | 2015-07-20 | 2015-07-20 | The transformer winding vibration measurement mechanism that transformer Intruding wave causes |
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- 2015-07-20 CN CN201520527718.6U patent/CN204944663U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |