CN-122017103-A - Chromatographic detection correction method and system

CN122017103ACN 122017103 ACN122017103 ACN 122017103ACN-122017103-A

Abstract

The invention provides a chromatographic detection correction method and a chromatographic detection correction system, which comprise the steps of obtaining first detection results of various components of a prepared detection comparison oil sample by a reference evaluation instrument of each reference evaluation unit, carrying out initial evaluation, removing the first detection results of which the evaluation does not meet preset requirements, analyzing the remaining first detection results, screening out qualified reference evaluation instruments and unqualified reference evaluation instruments of the first detection results, selecting a reference evaluation instrument from the qualified reference evaluation instruments, obtaining second detection results of at least two concentrations of the reference evaluation instruments, carrying out iterative correction on third detection results of the oil sample in the correction ratio by the unqualified reference evaluation instruments until the deviation of the correction results and the second detection results is smaller than a first preset deviation threshold, realizing objective and quantized evaluation of the detection level of each unit, comprehensively improving the overall accuracy and reliability of the chromatographic detection results, and ensuring the safe operation of a power grid.

Inventors

SHI RONGXUE
LIU KECHENG
LIU SIQI
HAN HESONG
ZHANG LIJUN
WANG YINGNAN
JIA JINGRAN

Assignees

国网河北省电力有限公司电力科学研究院
国家电网有限公司

Dates

Publication Date: 20260512
Application Date: 20251209

Claims (10)

1. A chromatographic detection correction method, comprising: acquiring a first detection result of each component of the prepared detection comparison oil sample by a reference evaluation instrument of each reference evaluation unit; Performing initial evaluation on the first detection results of all the reference evaluation instruments, and removing the first detection results of which the evaluation does not meet the preset requirements; Analyzing the residual first detection results, and screening out qualified and unqualified reference and evaluation instruments of the first detection results; selecting a reference evaluation instrument from qualified reference evaluation instruments, and acquiring a second detection result of the reference evaluation instrument on the correction comparison oil samples of the at least two concentrations matched by the weight; and acquiring a third detection result of the unqualified parameter evaluation instrument on the oil sample in each correction proportion, and carrying out iterative correction on the third detection result based on the second detection result until the deviation between the correction result and the second detection result is smaller than a first preset deviation threshold value.
2. The chromatography detection correction method according to claim 1, wherein iteratively correcting the third detection result based on the second detection result comprises: Determining a reference average value corresponding to the second detection result and a detection average value corresponding to the third detection result; Determining the correction degree of the unqualified reference evaluation instrument based on the reference average value and the detection average value; if the correction degree is larger than the preset correction degree, correcting the third detection result to obtain a current correction value; And calculating a deviation value of the current correction value and the reference average value, stopping iteration if the deviation value is smaller than or equal to a first preset deviation threshold value, and updating the detection average value by using the current correction value and carrying out the next iteration if the deviation value is larger than the first preset deviation threshold value.
3. The chromatography detection correction method according to claim 2, wherein correcting the third detection result to obtain the current correction value includes: Correcting the third detection result based on the constructed correction function to obtain a current correction value, wherein the correction function is as follows: ; Wherein, the Indicating a correction value, The intercept is indicated as the intercept and, The slope is indicated as such, And a value corresponding to the third detection result.
4. The chromatography detection correction method according to claim 3, wherein the slope acquisition process includes: And inputting the detection value corresponding to each second detection result, the detection value corresponding to each third detection result, the reference average value and the detection average value into a preset slope formula to obtain the slope.
5. The chromatography detection correction method according to claim 4, wherein the intercept acquisition process includes: And inputting the slope, the reference average value and the detection average value into a preset intercept formula to obtain the intercept.
6. The chromatography detection correction method according to claim 1, wherein the initial evaluation of the first detection result of each reference instrument is performed, and the removal of the first detection result whose evaluation does not meet the preset requirement comprises: For each evaluation instrument, acquiring two first detection results; calculating the average value of the two first detection results; If the average value of the first detection results is larger than a preset concentration threshold value, judging whether the difference between the two detection results is smaller than a second preset deviation threshold value, wherein the second preset deviation threshold value is a first proportion value of the average value of the first detection results; if the difference between the two first detection results is smaller than a second preset deviation threshold value, determining that the preset requirements are met; If the difference between the two first detection results is larger than or equal to the second preset deviation threshold value, determining that the preset requirements are not met.
7. The chromatography detection correction method according to claim 6, further comprising: if the average value of the first detection results is smaller than or equal to the preset concentration threshold value, judging whether the difference value of the two first detection results is smaller than a third preset deviation threshold value, wherein the third preset deviation threshold value is the sum of a second proportion value of the average value of the first detection results and a preset multiple of the minimum detection concentration of the component corresponding to the first detection results; if the difference between the two first detection results is smaller than a third preset deviation threshold value, determining that the preset requirements are met; If the difference between the two first detection results is greater than or equal to a third preset deviation threshold value, determining that the difference does not meet the preset requirement.
8. The chromatography detection correction method according to claim 1, wherein analyzing the remaining first detection results to screen out qualified and unqualified reference and evaluation instruments of the first detection results comprises: calculating a robust mean and a robust standard deviation for each class of components; for the value corresponding to each first detection result, calculating the difference between the value corresponding to the first detection result and the steady average value, and taking the absolute value after the steady standard deviation as the Z ratio score of each component; and taking the reference and evaluation instrument with the Z ratio score being larger than a preset qualification threshold as an unqualified reference and evaluation instrument with the Z ratio score being smaller than or equal to the preset qualification threshold as a qualified reference and evaluation instrument.
9. The chromatography detection correction method according to claim 1, further comprising: based on the result of the initial evaluation, counting a first total number of reject components of the reject reference instrument for each reference unit; Based on the screening result, counting a second total number of failed components of the failed reference instrument for each reference unit; summing the first sum of total numbers with the second sum of total numbers to obtain a third total number of unacceptable components; calculating the product of the total of the evaluation instruments of each evaluation unit and twice the number of components; obtaining the quotient of the third total number sum and the product to obtain the detection error rate of each evaluation unit; And sequencing according to the order of the error rate from large to small, and transmitting the sequence to the terminal of each evaluation unit.
10. A chromatographic detection correction system, comprising: the acquisition module is used for acquiring a first detection result of each component of the prepared detection comparison oil sample subjected to chromatographic detection by the parameter evaluation instrument of each parameter evaluation unit; The rejecting module is used for carrying out initial evaluation on the first detection results of the parameter evaluating instruments and rejecting the first detection results of which the evaluation does not meet the preset requirements; the screening module is used for analyzing the residual first detection results and screening out qualified and unqualified reference and evaluation instruments of the first detection results; The selecting module is used for selecting a reference evaluation instrument from qualified reference evaluation instruments and acquiring second detection results of correction comparison of at least two concentrations of the reference evaluation instrument to the matched oil sample; and the correction module is used for acquiring a third detection result of each correction proportion of the unqualified parameter evaluation instrument on the oil sample, and carrying out iterative correction on the third detection result based on the second detection result until the deviation between the correction result and the second detection result is smaller than a first preset deviation threshold value.

Description

Chromatographic detection correction method and system Technical Field The invention relates to the technical field of chromatographic analysis of electrical oil filling equipment, in particular to a chromatographic detection correction method and a chromatographic detection correction system. Background The insulating oil is used as one of core insulating mediums of the oil immersed transformer, the reactor, the current transformer, the sleeve and other electric oil filling equipment, and the health level of the electric oil filling equipment can be directly reflected by detecting the performance of the insulating oil. Chromatographic detection is widely used as one of the most sensitive means for sensing early failures of electrical oil-filled equipment. Industry requirements are that 1000kV oil-immersed power transformers and reactors should be subjected to one-time chromatography every month, 330 kV-750 kV equipment should be subjected to one-time chromatography every 3 months, 220kV equipment should be subjected to one-time chromatography every half year, and 35 kV-110 kV equipment should be subjected to one-time chromatography every 1 year. Therefore, the accuracy of the chromatographic detection results of each unit is directly related to the accuracy of the health level evaluation of all the on-line electrical oil-filled equipment of the company. In view of the fact that the chromatograph is one of the most sensitive means for sensing the early faults of the electric oil filling equipment, once the detection is inaccurate, unsafe events such as misjudgment, missed judgment and the like of the equipment faults are easily caused, and the safety and stability operation of a power grid are greatly threatened. However, the chromatographic detection process is complex, the factors influencing the accuracy of the result are numerous, the personnel level and the instrument state of each unit are uneven, and in addition, no national standard substance production unit capable of producing chromatographic analysis standard samples exists on the market, so that how to evaluate the chromatographic detection of each unit and correct the chromatographic detection result of the unqualified unit becomes a serious problem puzzling the chromatographic detection personnel of each unit. Although some methods for evaluating chromatographic detection results exist, the problems of non-uniform evaluation standards, imperfect correction methods and the like generally exist. Particularly, when the detection result is deviated, an effective correction mechanism is lacked to ensure the accuracy of the final result, and accidents such as misjudgment, missed judgment and the like of equipment are easily caused, so that the safety of the power grid is reduced. Disclosure of Invention The invention provides a chromatographic detection correction method and a chromatographic detection correction system, which are used for objectively and quantitatively evaluating the detection level of each unit and effectively and quickly correcting the detected detection result with problems on line, so that the overall accuracy and reliability of the chromatographic detection result are comprehensively improved, and a solid guarantee is provided for the state accurate diagnosis of power equipment and the safe operation of a power grid. In one aspect, the present invention provides a chromatographic detection correction method, comprising: acquiring a first detection result of each component of the prepared detection comparison oil sample by a reference evaluation instrument of each reference evaluation unit; Performing initial evaluation on the first detection results of all the reference evaluation instruments, and removing the first detection results of which the evaluation does not meet the preset requirements; Analyzing the residual first detection results, and screening out qualified and unqualified reference and evaluation instruments of the first detection results; selecting a reference evaluation instrument from qualified reference evaluation instruments, and acquiring a second detection result of the reference evaluation instrument on the correction comparison oil samples of the at least two concentrations matched by the weight; and acquiring a third detection result of the unqualified parameter evaluation instrument on the oil sample in each correction proportion, and carrying out iterative correction on the third detection result based on the second detection result until the deviation between the correction result and the second detection result is smaller than a first preset deviation threshold value. In another aspect, the present invention also provides a chromatographic detection and correction system, which includes: the acquisition module is used for acquiring a first detection result of each component of the prepared detection comparison oil sample subjected to chromatographic detection by the parameter evaluation instrument o