CN103592415A - Method for correcting concentration of single-component gas in transformer oil - Google Patents
Method for correcting concentration of single-component gas in transformer oil Download PDFInfo
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- CN103592415A CN103592415A CN201310508142.4A CN201310508142A CN103592415A CN 103592415 A CN103592415 A CN 103592415A CN 201310508142 A CN201310508142 A CN 201310508142A CN 103592415 A CN103592415 A CN 103592415A
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Abstract
The invention discloses a method for correcting the concentration of single-component gas in transformer oil, which relates to the technical field of power transformers and aims to achieve the effect of reducing the detection cost. The method comprises the steps of regularly extracting a transformer oil sample for off-line detection to obtain a high-precision gas concentration off-line detection result; calculating a tendency value of the gas concentration off-line detection result according to the high-precision gas concentration off-line detection result of the single-component gas in the transformer oil, then calculating a tendency value of a gas concentration on-line detection result of the single-component gas in the transformer oil in the current month, calculating a gas concentration correction proportion coefficient and a gas concentration correction constant of the single-component gas in the transformer oil in the current month, and correcting the gas concentration on-line detection result of the single-component gas in the transformer oil according to the gas concentration correction proportion coefficient and the gas concentration correction constant. The method disclosed by the invention is suitable for detection of the transformer oil sample in a transformer substation.
Description
Technical field
The present invention relates to power transformer technology, particularly relate to the technology of a kind of single-component gas concentration correction method in transformer oil.
Background technology
In electric system, insulating material in the oil-filled pipeline of transformer of normal operation is understood aging gradually under the effect such as hot, electric, produce multiple inflammable gas, constantly accumulation in the fluid of these gases in the oil-filled pipeline of transformer, convection current, diffusion, dissolving, until saturated and bubble, the gas evolution in fluid, the component gas content of analytical gas, insulation status and the internal electric equipment discharge scenario that can identify transformer, can effectively reduce the generation of Accident of Transformer.
At present, multicomponent gas identification in transformer oil is adopted to degassed mode mostly, which need to take a long time multicomponent gas in separate transformers oil, and degasification process is complicated, accurate measurement multicomponent gas needs accurate device, accuracy requirement to detecting sensor is higher, and therefore in existing transformer oil, detection of gas with multiple constituents installation cost is high.
Summary of the invention
For the defect existing in above-mentioned prior art, technical matters to be solved by this invention is to provide single-component gas concentration correction method in the transformer oil that a kind of testing cost is low.
In order to solve the problems of the technologies described above, in a kind of transformer oil provided by the present invention, single-component gas concentration correction method, is characterized in that, concrete steps are as follows:
1) set single month gas concentration of single-component gas in transformer oil is detected to number of times online, be designated as M;
2) regularly extract transformer oil sample and carry out offline inspection, utilize existing precision detecting instrument to record the high-precision gas concentration offline inspection result of single-component gas in transformer oil;
In each calendar month, the online gas concentration of single-component gas in transformer oil being carried out to M time detects, and records each testing result;
3) calendar month that need to revise the online testing result of gas concentration is set as current month;
4) from transformer oil in the high-precision gas concentration offline inspection result of single-component gas, obtain before current month and apart from current month 3 times nearest gas concentration offline inspection results, by these 3 gas concentration offline inspection results by the sequencing of detection time, by first to after be designated as successively T[1], T[2], T[3];
5) the gas concentration offline inspection result Trend value of single-component gas in calculating transformer oil, specific formula for calculation is:
Ttr?=?（T[3]+T[1]-2×T[2]）/2?+?T[3]；
In formula, Ttr is the gas concentration offline inspection result Trend value of single-component gas in transformer oil;
6) in calculating transformer oil, single-component gas is at the online testing result Trend value of gas concentration of the current moon, and specific formula for calculation is:
Ptr[n]?=?（Gm[n-3]?+?Gm[n-1]?–?2?×?Gm[n-2]）/2?+?Gm[n-1]；
In formula, Ptr[n] be in transformer oil single-component gas at the current month online testing result Trend value of gas concentration, n is current month, n-1 is the previous calendar month of the n month, n-2 is the previous calendar month of the n-1 month, n-3 is the previous calendar month of the n-2 month, Gm[n-1] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-1 month, Gm[n-2] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-2 month, Gm[n-3] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-3 month,
In formula, Gm[i] be in transformer oil single-component gas at the online testing result monthly average of the gas concentration value of i month, G[i, j] be in transformer oil single-component gas in the i online testing result of the j time gas concentration of individual month;
7) in calculating transformer oil, single-component gas is at gas concentration correction scale-up factor and the gas concentration correction constant of the current moon, and specific formula for calculation is:
K?=?int（Ttr?/?Ptr[n]）；
B?=?Ttr?–?K×Ptr[n]；
In formula, K is that in transformer oil, single-component gas is at the gas concentration correction scale-up factor of the current moon, and B is that in transformer oil, single-component gas is at the gas concentration correction constant of the current moon, and int is bracket function;
8) single-component gas in transformer oil is revised the online testing result of gas concentration of current month, concrete correction formula is:
S[n,j]?=G[n,j]×K?+?B；
In formula, S[n, j] be in transformer oil single-component gas at the modified value of the j time online testing result of gas concentration of current month, G[n, j] be in transformer oil single-component gas in the online testing result of the j time gas concentration of the current moon.
Single-component gas concentration correction method in transformer oil provided by the invention, according to the high-precision gas concentration offline inspection result of transformer oil sample, the online testing result of the gas concentration of single-component gas in transformer oil is revised, it is low that the method realizes cost, not high to sensor schedule requirement, can in the situation that guaranteeing the online accuracy of detection of gas concentration, reduce testing cost.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of single-component gas concentration correction method in embodiment of the present invention transformer oil.
Embodiment
Below in conjunction with accompanying drawing explanation, embodiments of the invention are described in further detail, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof, all should list protection scope of the present invention in.
As shown in Figure 1, in a kind of transformer oil that the embodiment of the present invention provides, single-component gas concentration correction method, is characterized in that, concrete steps are as follows:
1) set single month gas concentration of single-component gas in transformer oil is detected to number of times online, be designated as M;
2) regularly (being generally six months) extraction transformer oil sample carries out offline inspection, utilizes existing precision detecting instrument to record the high-precision gas concentration offline inspection result of single-component gas in transformer oil;
In each calendar month, the online gas concentration of single-component gas in transformer oil being carried out to M time detects, and records each testing result;
3) calendar month that need to revise the online testing result of gas concentration is set as current month;
4) from transformer oil in the high-precision gas concentration offline inspection result of single-component gas, obtain before current month and apart from current month 3 times nearest gas concentration offline inspection results, by these 3 gas concentration offline inspection results by the sequencing of detection time, by first to after be designated as successively T[1], T[2], T[3];
5) the gas concentration offline inspection result Trend value of single-component gas in calculating transformer oil, specific formula for calculation is:
Ttr?=?（T[3]+T[1]-2×T[2]）/2?+?T[3]；
In formula, Ttr is the gas concentration offline inspection result Trend value of single-component gas in transformer oil;
6) in calculating transformer oil, single-component gas is at the online testing result Trend value of gas concentration of the current moon, and specific formula for calculation is:
Ptr[n]?=?（Gm[n-3]?+?Gm[n-1]?–?2?×?Gm[n-2]）/2?+?Gm[n-1]；
In formula, Ptr[n] be in transformer oil single-component gas at the current month online testing result Trend value of gas concentration, n is current month, n-1 is the previous calendar month of the n month, n-2 is the previous calendar month of the n-1 month, n-3 is the previous calendar month of the n-2 month, Gm[n-1] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-1 month, Gm[n-2] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-2 month, Gm[n-3] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-3 month,
In formula, Gm[i] be in transformer oil single-component gas at the online testing result monthly average of the gas concentration value of i month, G[i, j] be in transformer oil single-component gas in the i online testing result of the j time gas concentration of individual month;
7) in calculating transformer oil, single-component gas is at gas concentration correction scale-up factor and the gas concentration correction constant of the current moon, and specific formula for calculation is:
K?=?int（Ttr?/?Ptr[n]）；
B?=?Ttr?–?K×Ptr[n]；
In formula, K is that in transformer oil, single-component gas is at the gas concentration correction scale-up factor of the current moon, and B is that in transformer oil, single-component gas is at the gas concentration correction constant of the current moon, and int is bracket function;
8) single-component gas in transformer oil is revised the online testing result of gas concentration of current month, concrete correction formula is:
S[n,j]?=G[n,j]×K?+?B；
In formula, S[n, j] be in transformer oil single-component gas at the modified value of the j time online testing result of gas concentration of current month, G[n, j] be in transformer oil single-component gas in the online testing result of the j time gas concentration of the current moon.
Claims (1)
1. a single-component gas concentration correction method in transformer oil, is characterized in that, concrete steps are as follows:
1) set single month gas concentration of single-component gas in transformer oil is detected to number of times online, be designated as M;
2) regularly extract transformer oil sample and carry out offline inspection, utilize existing precision detecting instrument to record the high-precision gas concentration offline inspection result of single-component gas in transformer oil;
In each calendar month, the online gas concentration of single-component gas in transformer oil being carried out to M time detects, and records each testing result;
3) calendar month that need to revise the online testing result of gas concentration is set as current month;
4) from transformer oil in the high-precision gas concentration offline inspection result of single-component gas, obtain before current month and apart from current month 3 times nearest gas concentration offline inspection results, by these 3 gas concentration offline inspection results by the sequencing of detection time, by first to after be designated as successively T[1], T[2], T[3];
5) the gas concentration offline inspection result Trend value of single-component gas in calculating transformer oil, specific formula for calculation is:
Ttr?=?（T[3]+T[1]-2×T[2]）/2?+?T[3]；
In formula, Ttr is the gas concentration offline inspection result Trend value of single-component gas in transformer oil;
6) in calculating transformer oil, single-component gas is at the online testing result Trend value of gas concentration of the current moon, and specific formula for calculation is:
Ptr[n]?=?（Gm[n-3]?+?Gm[n-1]?–?2?×?Gm[n-2]）/2?+?Gm[n-1]；
In formula, Ptr[n] be in transformer oil single-component gas at the current month online testing result Trend value of gas concentration, n is current month, n-1 is the previous calendar month of the n month, n-2 is the previous calendar month of the n-1 month, n-3 is the previous calendar month of the n-2 month, Gm[n-1] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-1 month, Gm[n-2] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-2 month, Gm[n-3] be in transformer oil single-component gas the online testing result monthly average of the gas concentration value of n-3 month,
In formula, Gm[i] be in transformer oil single-component gas at the online testing result monthly average of the gas concentration value of i month, G[i, j] be in transformer oil single-component gas in the i online testing result of the j time gas concentration of individual month;
7) in calculating transformer oil, single-component gas is at gas concentration correction scale-up factor and the gas concentration correction constant of the current moon, and specific formula for calculation is:
K?=?int（Ttr?/?Ptr[n]）；
B?=?Ttr?–?K×Ptr[n]；
In formula, K is that in transformer oil, single-component gas is at the gas concentration correction scale-up factor of the current moon, and B is that in transformer oil, single-component gas is at the gas concentration correction constant of the current moon, and int is bracket function;
8) single-component gas in transformer oil is revised the online testing result of gas concentration of current month, concrete correction formula is:
S[n,j]?=G[n,j]×K?+?B；
In formula, S[n, j] be in transformer oil single-component gas at the modified value of the j time online testing result of gas concentration of current month, G[n, j] be in transformer oil single-component gas in the online testing result of the j time gas concentration of the current moon.
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| CN114858946A (en) * | 2022-06-04 | 2022-08-05 | 山东五岳电器有限公司 | Online monitoring device and calibration method for gas in transformer oil |
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| CN103018344A (en) * | 2012-12-07 | 2013-04-03 | 汉中供电局 | Calibrating method of color spectrum in oil on-line detecting device |
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Patent Citations (3)
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| CN101101298A (en) * | 2006-07-06 | 2008-01-09 | 沃尔克工业电子有限公司 | Method for amending measurement value obtained by aerometry device |
| CN102183468A (en) * | 2011-02-23 | 2011-09-14 | 中国科学院安徽光学精密机械研究所 | Interference correction and concentration inversion method of multi-component gas analysis |
| CN103018344A (en) * | 2012-12-07 | 2013-04-03 | 汉中供电局 | Calibrating method of color spectrum in oil on-line detecting device |
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| 刘子骞: "关于"用平均变动趋势值修正趋势"的探讨", 《现代财贸（广东省财贸管理干部学院学报）》, no. 2, 15 December 1996 (1996-12-15), pages 85 - 87 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114858946A (en) * | 2022-06-04 | 2022-08-05 | 山东五岳电器有限公司 | Online monitoring device and calibration method for gas in transformer oil |
| CN114858946B (en) * | 2022-06-04 | 2024-03-22 | 山东五岳电器有限公司 | Online monitoring device and calibration method for gas in transformer oil |
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Effective date of registration: 20200520 Address after: 215200 south of Lianyang road and east of Chang'an Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province (Science and technology entrepreneurship Park) Patentee after: Wujiang science and Technology Pioneer Park Management Service Co., Ltd Address before: 200233, building 12, building 470, No. 5, Guiping Road, Shanghai, Xuhui District Patentee before: SHANGHAI SUNRISE POWER TECHNOLOGY Co.,Ltd. |
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