CN109781264B - Transformer optical fiber temperature measurement system and method - Google Patents
Transformer optical fiber temperature measurement system and method Download PDFInfo
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- CN109781264B CN109781264B CN201910071288.4A CN201910071288A CN109781264B CN 109781264 B CN109781264 B CN 109781264B CN 201910071288 A CN201910071288 A CN 201910071288A CN 109781264 B CN109781264 B CN 109781264B
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Abstract
The invention discloses a transformer optical fiber temperature measurement system, which comprises a plurality of optical fiber temperature measurement sensors, a temperature sensor and a temperature sensor, wherein the optical fiber temperature measurement sensors are used for detecting real-time temperatures of different positions in a transformer; the temperature data preprocessing module is in communication connection with the optical fiber temperature measuring sensor and is used for screening temperature data; the temperature data synthesis module is in communication connection with the temperature data preprocessing module and is used for synthesizing the temperature data at different positions to obtain the real-time operating temperature of the transformer; and the temperature data correction module is in communication connection with the temperature data synthesis module and is used for correcting the synthesized running temperature of the transformer. The invention can improve the defects of the prior art and improve the accuracy of the temperature detection of the transformer.
Description
Technical Field
The invention relates to the technical field of transformer safety protection, in particular to a transformer optical fiber temperature measurement system and a transformer optical fiber temperature measurement method.
Background
The temperature detection in the running process of the transformer is an important measure for ensuring the safety of the transformer. The temperature inside the transformer is usually collected by a fiber optic temperature sensor. The existing temperature measurement system has poor precision and cannot accurately reflect the actual running state of the transformer.
Disclosure of Invention
The invention aims to provide a transformer optical fiber temperature measurement system and method, which can solve the defects of the prior art and improve the accuracy of transformer temperature detection.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A temperature measurement system of optical fiber for transformer comprises,
the optical fiber temperature measuring sensors are used for detecting real-time temperatures of different positions in the transformer;
the temperature data preprocessing module is in communication connection with the optical fiber temperature measuring sensor and is used for screening temperature data;
the temperature data synthesis module is in communication connection with the temperature data preprocessing module and is used for synthesizing the temperature data at different positions to obtain the real-time operating temperature of the transformer;
and the temperature data correction module is in communication connection with the temperature data synthesis module and is used for correcting the synthesized running temperature of the transformer.
A temperature measurement method of the transformer optical fiber temperature measurement system comprises the following steps:
A. the optical fiber temperature measuring sensor collects temperature data of a temperature sampling point in the transformer;
B. the temperature data preprocessing module screens the temperature data and deletes deviation data;
C. the temperature data synthesis module synthesizes the real-time operating temperature of the transformer according to the temperature data of different temperature sampling points;
D. and C, correcting the real-time operation temperature of the transformer synthesized in the step C by the temperature data correction module.
Preferably, in step B, the screening of the temperature data comprises the steps of,
b1, fitting the discrete temperature data collected by the same optical fiber temperature measurement sensor to obtain a first temperature curve;
b2, marking discrete temperature data with the distance from the corresponding temperature curve being larger than a set threshold;
b3, performing secondary fitting on the marked discrete temperature data collected by the same optical fiber temperature measuring sensor to obtain a second temperature curve, comparing different second temperature curves, and unmarking the discrete temperature data of linearly related areas on any two or more second temperature curves;
b4, refitting the first temperature curve using the discrete temperature data with the labels removed.
Preferably, in step C, the real-time operating temperature of the synthesis transformer comprises the steps of,
c1, calculating the position coordinate of the space point with the minimum sum of the distances between the space point and each optical fiber temperature measuring sensor according to the installation position of the optical fiber temperature measuring sensors, and taking the coordinate as the calculation coordinate of the real-time running temperature of the transformer;
c2, giving a weighting coefficient to each first temperature curve, wherein the weighting coefficient is in direct proportion to the distance between the corresponding optical fiber temperature measuring sensor and the calculation coordinate, and the sum of all the weighting coefficients is 1;
and C3, carrying out weighted summation on the first temperature curve by using the weighting coefficient to obtain a real-time operation temperature curve of the transformer.
Preferably, the step D of correcting the real-time operating temperature of the transformer comprises the steps of,
d1, carrying out weighted summation on the discrete temperature data marked in the step B according to the modes of the steps C2 and C3 to obtain a reference temperature curve;
d2, comparing the reference temperature curve with the real-time operation temperature curve of the transformer obtained in the step C3, and extracting the reference temperature curve of the linear correlation part;
d3, carrying out weighted average on the extracted temperature curve section and the real-time operation temperature curve of the transformer obtained in the step C3, wherein the weighted ratio of the extracted temperature curve section to the real-time operation temperature curve of the transformer is 1.5: 8.5.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, the abnormal data can be effectively removed by screening the temperature data. In the screening process, data which can correctly reflect the temperature state of the transformer is kept as much as possible through two data rechecks, so that data fitting deviation caused by screening of the data is avoided. The invention has simple structure and reasonable data processing mode, and can effectively improve the accuracy of temperature detection.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention.
Detailed Description
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.
Referring to fig. 1, one embodiment of the present invention includes,
the optical fiber temperature measuring sensors 1 are used for detecting real-time temperatures of different positions in the transformer;
the temperature data preprocessing module 2 is in communication connection with the optical fiber temperature measuring sensor 1 and is used for screening temperature data;
the temperature data synthesis module 3 is in communication connection with the temperature data preprocessing module 2 and is used for synthesizing temperature data at different positions to obtain the real-time operating temperature of the transformer;
and the temperature data correction module 4 is in communication connection with the temperature data synthesis module 3 and is used for correcting the synthesized running temperature of the transformer.
When the optical fiber temperature measuring sensors 1 are installed, the effective temperature measuring range of each optical fiber temperature measuring sensor 1 at least has an overlapping area with the effective temperature measuring ranges of the other two optical fiber temperature measuring sensors 1, and no overlapping area exists between the effective temperature measuring ranges of the other two optical fiber temperature measuring sensors 1. The arrangement mode can improve the mutual verification accuracy of data among different optical fiber temperature measuring sensors 1 when screening temperature data.
A temperature measurement method of the transformer optical fiber temperature measurement system comprises the following steps:
A. the optical fiber temperature measuring sensor 1 acquires temperature data of a temperature sampling point in the transformer;
B. the temperature data preprocessing module 2 screens the temperature data and deletes deviation data;
C. the temperature data synthesis module 3 synthesizes the real-time operating temperature of the transformer according to the temperature data of different temperature sampling points;
D. and C, correcting the real-time operation temperature of the transformer synthesized in the step C by the temperature data correction module 4.
In step B, the screening of the temperature data comprises the following steps,
b1, fitting the discrete temperature data collected by the same optical fiber temperature measuring sensor 1 to obtain a first temperature curve;
b2, marking discrete temperature data with the distance from the corresponding temperature curve being larger than a set threshold;
b3, performing secondary fitting on the marked discrete temperature data acquired by the same optical fiber temperature measuring sensor 1 to obtain a second temperature curve, comparing different second temperature curves, and unmarking the discrete temperature data of linearly related areas on any two or more second temperature curves;
b4, refitting the first temperature curve using the discrete temperature data with the labels removed.
In step C, synthesizing the real-time operating temperature of the transformer comprises the following steps,
c1, calculating the position coordinate of the space point with the minimum sum of the distances between the space point and each optical fiber temperature measuring sensor 1 according to the installation position of the optical fiber temperature measuring sensor 1, and taking the coordinate as the calculation coordinate of the real-time running temperature of the transformer;
c2, giving a weighting coefficient to each first temperature curve, wherein the weighting coefficient is in direct proportion to the distance between the corresponding optical fiber temperature measuring sensor 1 and the calculation coordinate, and the sum of all the weighting coefficients is 1;
and C3, carrying out weighted summation on the first temperature curve by using the weighting coefficient to obtain a real-time operation temperature curve of the transformer.
In addition, when calculating the weighting coefficients, the weighting coefficients are calculated individually for the points in time when the temperature change directions (positive and negative values) of the respective first temperature profiles are not matched. When the single calculation is carried out, the weighting coefficient of the first temperature curve with the largest temperature change rate is increased by 1.2-1.5 times, and the other first temperature curves are reduced in the same amplitude, so that the sum of all the weighting coefficients is ensured to be 1. By independently processing the time points with inconsistent temperature change trends, the state of abnormal temperature change in the transformer can be accurately acquired and early warned, so that the accuracy of temperature detection of the transformer is further improved.
In step D, the step of correcting the real-time operation temperature of the transformer comprises the following steps,
d1, carrying out weighted summation on the discrete temperature data marked in the step B according to the modes of the steps C2 and C3 to obtain a reference temperature curve;
d2, comparing the reference temperature curve with the real-time operation temperature curve of the transformer obtained in the step C3, and extracting the reference temperature curve of the linear correlation part;
d3, carrying out weighted average on the extracted temperature curve section and the real-time operation temperature curve of the transformer obtained in the step C3, wherein the weighted ratio of the extracted temperature curve section to the real-time operation temperature curve of the transformer is 1.5: 8.5.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A temperature measurement method of a transformer optical fiber temperature measurement system is characterized in that: the optical fiber temperature measuring system of the transformer comprises,
the optical fiber temperature measuring sensors (1) are used for detecting real-time temperatures of different positions in the transformer;
the temperature data preprocessing module (2) is in communication connection with the optical fiber temperature measuring sensor (1) and is used for screening temperature data;
the temperature data synthesis module (3) is in communication connection with the temperature data preprocessing module (2) and is used for synthesizing temperature data at different positions to obtain the real-time operating temperature of the transformer;
the temperature data correction module (4) is in communication connection with the temperature data synthesis module (3) and is used for correcting the synthesized running temperature of the transformer;
the temperature measuring method of the transformer optical fiber temperature measuring system comprises the following steps:
A. the optical fiber temperature measuring sensor (1) collects temperature data of a temperature sampling point in the transformer;
B. the temperature data preprocessing module (2) screens the temperature data and deletes deviation data;
C. the temperature data synthesis module (3) synthesizes the real-time operating temperature of the transformer according to the temperature data of different temperature sampling points;
D. c, correcting the real-time operation temperature of the transformer synthesized in the step C by a temperature data correction module (4);
in step B, the screening of the temperature data comprises the following steps,
b1, fitting the discrete temperature data collected by the same optical fiber temperature measuring sensor (1) to obtain a first temperature curve;
b2, marking discrete temperature data with the distance from the corresponding temperature curve being larger than a set threshold;
b3, performing secondary fitting on the marked discrete temperature data collected by the same optical fiber temperature measuring sensor (1) to obtain a second temperature curve, comparing different second temperature curves, and unmarking the discrete temperature data of linearly related areas on any two or more second temperature curves;
b4, refitting the first temperature curve using the discrete temperature data with the labels removed.
2. The temperature measurement method of the optical fiber temperature measurement system of the transformer according to claim 1, wherein: in step C, synthesizing the real-time operating temperature of the transformer comprises the following steps,
c1, calculating a space point position coordinate with the minimum sum of the distances between the space point position coordinate and each optical fiber temperature measuring sensor (1) according to the installation position of the optical fiber temperature measuring sensor (1), and taking the coordinate as a calculation coordinate of the real-time running temperature of the transformer;
c2, giving a weighting coefficient to each first temperature curve, wherein the weighting coefficient is in direct proportion to the distance between the corresponding optical fiber temperature measuring sensor (1) and the calculation coordinate, and the sum of all the weighting coefficients is 1;
and C3, carrying out weighted summation on the first temperature curve by using the weighting coefficient to obtain a real-time operation temperature curve of the transformer.
3. The temperature measurement method of the optical fiber temperature measurement system of the transformer according to claim 2, wherein: in step D, the step of correcting the real-time operation temperature of the transformer comprises the following steps,
d1, carrying out weighted summation on the discrete temperature data marked in the step B according to the modes of the steps C2 and C3 to obtain a reference temperature curve;
d2, comparing the reference temperature curve with the real-time operation temperature curve of the transformer obtained in the step C3, and extracting the reference temperature curve of the linear correlation part;
d3, carrying out weighted average on the extracted temperature curve section and the real-time operation temperature curve of the transformer obtained in the step C3, wherein the weighted ratio of the extracted temperature curve section to the real-time operation temperature curve of the transformer is 1.5: 8.5.
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| CN102353475A (en) * | 2011-09-15 | 2012-02-15 | 天津理工大学 | Distributed grating temperature measurement method based on two-time data fusion technology |
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| KR101681561B1 (en) * | 2015-05-22 | 2016-12-01 | 한국광기술원 | apparatus for determination of temperature and dissolved gases in insulation oil of transformer |
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|---|---|---|---|---|
| CN101408427A (en) * | 2008-11-19 | 2009-04-15 | 中国航天时代电子公司 | Distributed layer-dividing grade temperature error compensating method of optical fiber gyroscope |
| CN101567117A (en) * | 2009-05-17 | 2009-10-28 | 金如江 | Treatment method of distribution type optical fiber temperature measuring data used for fire disaster alarm |
| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
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