CN112861358A - Transformer fire extinguishing device assessment method - Google Patents
Transformer fire extinguishing device assessment method Download PDFInfo
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- CN112861358A CN112861358A CN202110184200.7A CN202110184200A CN112861358A CN 112861358 A CN112861358 A CN 112861358A CN 202110184200 A CN202110184200 A CN 202110184200A CN 112861358 A CN112861358 A CN 112861358A
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- 238000000034 method Methods 0.000 title claims description 13
- 238000011156 evaluation Methods 0.000 claims abstract description 28
- 239000013598 vector Substances 0.000 claims abstract description 20
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 16
- 230000001629 suppression Effects 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000012502 risk assessment Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G06F17/10—Complex mathematical operations
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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a transformer fire extinguishing apparatus evaluation method, which comprises the following steps: acquiring state quantity data of a transformer fire extinguishing device; inputting the obtained data of each state quantity into a processor to obtain a membership vector corresponding to each state quantity; forming a state quantity importance matrix according to an importance level scale stored in a first database; obtaining a weight vector based on the state quantity importance matrix, and calculating to obtain an initial score value of the transformer fire extinguishing device; acquiring a fire risk evaluation value of the transformer to be matched with the deduction value stored in the second database, and acquiring a deduction value corresponding to the evaluation value; adding the initial score value and the deduction value to obtain a comprehensive score of the variable fire extinguishing device considering the fire risk of the transformer; and evaluating the performance of the transformer fire extinguishing device according to the comprehensive score. Comprehensive evaluation is carried out on the transformer fire extinguishing device, the fire extinguishing efficiency of the transformer fire extinguishing device can be effectively improved, and the disaster loss is reduced.
Description
Technical Field
The invention belongs to the technical field of fire fighting equipment, and particularly relates to a transformer fire extinguishing device evaluation method.
Background
The transformer is one of the key devices in power transmission, and the state of the transformer affects not only the safe operation of the transformer, but also the stability and reliability of the operation of the power system. In the event of a transformer failure, the enormous arc energy may cause a fire. Recently, a fire disaster happens in a converter station due to the fault of the oil paper insulating sleeve on the network side, the fire disaster spreads from the converter transformer body to the valve hall, the whole valve hall collapses, and 6 converter transformers, converter valves and other equipment in the same valve hall are on fire; a sleeve on the converter transformer side of a certain converter station fails to catch fire, and the converter transformer is in fire; and a fire disaster happens to HD converter transformer faults of a certain converter station. The converter transformer has a large fire risk, and the direct current system is shut down due to the converter transformer fire, so that great economic loss is directly caused.
The evaluation method of the fire extinguishing device of the transformer at the present stage is not comprehensive enough, the risk of fire of the transformer is not comprehensively considered, and the flammable property and the difficult property of the transformer are not distinguished. This may lead to the transformer extinguishing device not in place to maintain, overhaul, cause the difficulty of putting out a fire when conflagration to increase, the loss that causes when having enlarged the conflagration.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an evaluation method of a transformer fire extinguishing device, which is used for comprehensively evaluating the transformer fire extinguishing device, provides reference for daily operation and maintenance strategies of the fire extinguishing device, can effectively improve the fire extinguishing efficiency of the transformer fire extinguishing device and is beneficial to reducing disaster loss.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a transformer fire suppression apparatus evaluation method, comprising:
acquiring state quantity data of a transformer fire extinguishing device;
inputting the obtained data of each state quantity into a processor to obtain a membership vector corresponding to each state quantity;
the analysis conference is held up, and a state quantity importance degree matrix is formed according to an importance level scale stored in a first database;
obtaining a weight vector based on the state quantity importance matrix, and calculating to obtain an initial score value of the transformer fire extinguishing device;
acquiring a fire risk evaluation value of the transformer to be matched with the deduction value stored in the second database, and acquiring a deduction value corresponding to the evaluation value;
adding the initial score value and the deduction value to obtain a comprehensive score of the variable fire extinguishing device considering the fire risk of the transformer;
and evaluating the performance of the transformer fire extinguishing device according to the comprehensive score.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an evaluation method of a transformer fire extinguishing device, which is used for comprehensively evaluating the transformer fire extinguishing device, provides reference for daily operation and maintenance strategies of the fire extinguishing device, can effectively improve the fire extinguishing efficiency of the transformer fire extinguishing device, and is beneficial to reducing disaster loss.
Drawings
Fig. 1 is a flowchart of a method for evaluating a fire extinguishing apparatus for a transformer according to an embodiment of the present invention.
Detailed Description
Example (b):
the technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, the method for evaluating a fire extinguishing apparatus of a transformer provided by this embodiment mainly includes the following steps:
101. acquiring state quantity data of a transformer fire extinguishing device;
102. inputting the obtained data of each state quantity into a processor to obtain a membership vector corresponding to each state quantity;
103. forming a state quantity importance matrix according to an importance level scale stored in a first database;
104. obtaining a weight vector based on the state quantity importance matrix, and calculating to obtain an initial score value of the transformer fire extinguishing device;
105. acquiring a fire risk evaluation value of the transformer to be matched with the deduction value stored in the second database, and acquiring a deduction value corresponding to the evaluation value;
106. adding the initial score value and the deduction value to obtain a comprehensive score of the variable fire extinguishing device considering the fire risk of the transformer;
107. and evaluating the performance of the transformer fire extinguishing device according to the comprehensive score.
Therefore, the method comprehensively considers the risk of transformer fire, distinguishes the flammability and the flame retardancy of the transformer, comprehensively evaluates the fire extinguishing device of the transformer, provides reference for the daily operation and maintenance strategy of the fire extinguishing device, can effectively improve the fire extinguishing efficiency of the fire extinguishing device of the transformer, and is beneficial to reducing disaster loss.
Specifically, the state quantity of the transformer fire extinguishing device comprises response time TXWater mist intensity QSAnd the number of the nozzles spraying at the same time accounts for BLThe spraying pressure P of the nozzle at the worst pointSContinuous supply time T of water poolGThe calculation formula of each state quantity is as follows:
in this way, the score of each state quantity can be accurately calculated by the above calculation method.
Specifically, the inputting the obtained data of each state quantity into the processor to obtain the membership vector corresponding to each state quantity includes:
and (3) substituting each state quantity into a corresponding scoring function for scoring, and substituting the scoring function into the membership function of each grade shown in the following table to obtain the membership degree of 1 x 3 row vectors corresponding to each state of each state quantity, wherein x represents the scoring value of each state quantity:
that is, the performance of the fire extinguishing apparatus is divided into L1、L2、L3Three levels, i.e. V ═ L1、L2、L3}。
Specifically, the importance level scale stored in the first database includes:
0.05-0.95 scale of importance level
The method comprises the following steps of obtaining a weight vector on the basis of the state quantity importance matrix, and calculating and obtaining an initial score value of the transformer fire extinguishing device:
weight vector wiSatisfies the following conditions:
the score is calculated according to the following formula:
wherein ,
weight vector (line) for a certain evaluation object, BiIs a membership matrix of a certain evaluation object,
score vector (column), f for a certain evaluation objectscoreThe initial score for the fire suppression device. Wherein the score is an average between three grades of L1, L2 and L3.
Specifically, the obtaining of the fire risk assessment value of the transformer to match the score value stored in the second database includes:
from the flash point f of the insulating oilfpOil tank rim seal fmfThe furfural content f in the oilkqAnd (3) carrying out transformer fire risk assessment on three aspects:
ffx＝0.3ffp+0.5fmf+0.2fkq
for ffxThe following scoring criteria are present:
| ffx | score of |
| 0≤ffx＜7 | -1 |
| 7≤ffx＜11 | -3 |
| 11≤ffx＜13 | -9 |
| 13≤ffx＜17 | -11 |
| 17≤ffx＜23 | -13 |
| 23≤ffx＜37 | -23 |
| 37≤ffx＜57 | -29 |
| 57≤ffx＜97 | -37 |
| 97≤ffx＜107 | -53 |
| 107≤ffx | -97 |
。
A. The insulation oil flash point was scored using the following formula:
wherein ,ffpIs an index score of the flash point of insulating oil, f (x)i) Test data for past flash points, ordered chronologically, f (x)i-1) For the most recent data, f (x)0) The value is zero;
B. the tank rim seal was scored using the following formula
1) Adopt the bolt fastening mode to sealed along adopting upper portion oil tank:
wherein ,fmfThe upper tank rim sealing performance score, As is the single bolt crimping surface area,
the average number of threads exposed after the upper oil tank is fastened along the bolt, Q is a fastening coefficient, gamma is a Poisson coefficient, N is the number of fastening screws on the upper oil tank edge, P is the pressure of the transformer oil in fault, S is the surface area of the upper oil tank, mu is the barrier coefficient of the insulating oil to the shock wave, K is the shock coefficient, K is the impact coefficientTIs a reliability factor;
2) adopt the welded fastening mode to sealed along adopting upper portion oil tank:
wherein ,fmfScoring the upper tank edge seal performance, L is the weld length, T is the weld thickness, σtAllowing stress for material, gamma is Poisson coefficient, P is pressure of transformer oil in fault, S is surface area of upper oil tank, mu is barrier coefficient of insulating oil to shock wave, K is shock coefficient, K is pressure of transformer oil in fault, andTis a reliability factor;
C. the furfural content of the oil was scored using the following formula:
wherein ,fkqThe method is characterized in that the method comprises the following steps of (1) scoring the furfural content in oil, wherein x is a current furfural content test value, y is the current transformer operation life, B is a reference value, and for B, the reference table is as follows:
| operating life y | [0,5) | [5,10) | [10,15) | [15,20) |
| B valuation | 0.1 | 0.2 | 0.4 | 0.75 |
。
Specifically, the evaluating the performance of the transformer fire extinguishing apparatus according to the composite score comprises:
{L1and the mark represents that the fire extinguishing device is rated for 0-60 minutes and needs to be immediately overhauled. { L2The mark represents 61-89 points of the fire extinguishing device, and minor repair needs to be arranged as soon as possible. { L3The mark of the fire extinguishing device is 90-100 points, and the fire extinguishing device can be maintained for a long time.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A transformer fire suppression apparatus evaluation method, comprising:
acquiring state quantity data of a transformer fire extinguishing device;
inputting the obtained data of each state quantity into a processor to obtain a membership vector corresponding to each state quantity;
forming a state quantity importance matrix according to an importance level scale stored in a first database;
obtaining a weight vector based on the state quantity importance matrix, and calculating to obtain an initial score value of the transformer fire extinguishing device;
acquiring a fire risk evaluation value of the transformer to be matched with the deduction value stored in the second database, and acquiring a deduction value corresponding to the evaluation value;
adding the initial score value and the deduction value to obtain a comprehensive score of the variable fire extinguishing device considering the fire risk of the transformer;
and evaluating the performance of the transformer fire extinguishing device according to the comprehensive score.
2. The transformer fire suppression apparatus evaluation method according to claim 1, wherein the state quantity of the transformer fire suppression apparatus includes a response time TXWater mist intensity QSAnd the number of the nozzles spraying at the same time accounts for BLThe spraying pressure P of the nozzle at the worst pointSContinuous supply time T of water poolG。
3. The transformer fire suppression apparatus evaluation method of claim 2, wherein the response time TXThe score calculation formula of (a) is:
intensity Q of the water mistSThe score calculation formula of (a) is:
4. method for evaluating a fire extinguishing apparatus for transformers according to claim 2 or 3, characterized in that the number of spraying heads spraying simultaneously is in proportion to BLThe score calculation formula of (a) is:
the water spray pressure P of the most unfavorable point nozzleSThe score calculation formula of (a) is:
the continuous supply time T of the poolGThe score calculation formula of (a) is:
5. the method for evaluating a fire extinguishing apparatus of a transformer according to claim 4, wherein the step of inputting the obtained data of each state quantity into the processor to obtain the corresponding membership vector of each state quantity comprises the following steps:
and (3) substituting each state quantity into a corresponding scoring function for scoring, and substituting the scoring function into the membership function of each grade shown in the following table to obtain the membership degree of 1 x 3 row vectors corresponding to each state of each state quantity, wherein x represents the scoring value of each state quantity:
6. the transformer fire suppression apparatus evaluation method of claim 5, wherein the importance level scale stored by the first database comprises: 0.05-0.95 scale of importance level
7. The method for evaluating a fire extinguishing apparatus of a transformer according to claim 6, wherein the obtaining of the weight vector based on the state quantity importance matrix comprises:
weight vector wiSatisfies the following conditions:
the score is calculated according to the following formula:
wherein ,
a weight vector for a certain evaluation object, BiIs a membership matrix of a certain evaluation object,
a score vector for a certain evaluation object, fscoreThe initial score for the fire suppression device.
8. The transformer fire extinguishing apparatus evaluation method of claim 1, wherein the obtaining of the transformer fire risk assessment value to match the score values stored in the second database comprises:
from the flash point f of the insulating oilfpOil tank rim seal fmfThe furfural content f in the oilkqAnd (3) carrying out transformer fire risk assessment on three aspects:
ffx＝0.3ffp+0.5fmf+0.2fkq
for ffxThe following scoring criteria are present:
。
9. The transformer fire suppression apparatus evaluation method according to claim 8,
A. the insulation oil flash point was scored using the following formula:
wherein ,ffpIs an index score of the flash point of insulating oil, f (x)i) Test data for past flash points, ordered chronologically, f (x)i-1) For the most recent data, f (x)0) The value is zero;
B. the tank rim seal was scored using the following formula
1) Adopt the bolt fastening mode to sealed along adopting upper portion oil tank:
wherein ,fmfScoring the sealing performance of the upper oil tank edge, wherein As is the single bolt compression joint surface area, L is the average number of threads exposed after the upper oil tank edge is fastened by the bolt, Q is the fastening coefficient, gamma is the Poisson coefficient, N is the number of fastening screws of the upper oil tank edge, P is the transformer oil pressure in fault, S is the upper oil tank surface area, mu is the barrier coefficient of insulating oil to shock waves, K is the shock coefficient, K is the impact coefficientTIs a reliability factor;
2) adopt the welded fastening mode to sealed along adopting upper portion oil tank:
wherein ,fmfScoring the upper tank edge seal performance, L is the weld length, T is the weld thickness, σtAllowing stress for material, gamma is Poisson coefficient, P is pressure of transformer oil in fault, S is surface area of upper oil tank, mu is barrier coefficient of insulating oil to shock wave, K is shock coefficient, K is pressure of transformer oil in fault, andTis a reliability factor;
C. the furfural content of the oil was scored using the following formula:
wherein ,fkqThe method is characterized in that the method comprises the following steps of (1) scoring the furfural content in oil, wherein x is a current furfural content test value, y is the current transformer operation life, B is a reference value, and for B, the reference table is as follows:
。
10. The transformer fire suppression apparatus evaluation method of claim 7, wherein the evaluating the performance of the transformer fire suppression apparatus based on the composite score comprises:
the fire extinguishing device scores 0-60 points and needs to be immediately overhauled;
the fire extinguishing device scores 61-89 points, and needs to be scheduled for minor repair as soon as possible;
the fire extinguishing device scores 90-100 points, and can be maintained for a long time.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750321A1 (en) * | 1995-06-19 | 1996-12-27 | Jürgen Bastian | Device protecting liquid media, especially electric insulating media, from fire involvement |
| CN102621421A (en) * | 2012-03-29 | 2012-08-01 | 贵阳供电局 | Transformer state evaluation method based on correlation analysis and variable weight coefficients |
| CN103926491A (en) * | 2014-04-21 | 2014-07-16 | 国家电网公司 | Transformer state evaluation method with influence of direct-current magnetic bias taken into account |
| CN107016500A (en) * | 2017-03-27 | 2017-08-04 | 国家电网公司 | Transformer fuzzy synthetic appraisement method based on variable weight |
-
2021
- 2021-02-08 CN CN202110184200.7A patent/CN112861358B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750321A1 (en) * | 1995-06-19 | 1996-12-27 | Jürgen Bastian | Device protecting liquid media, especially electric insulating media, from fire involvement |
| CN102621421A (en) * | 2012-03-29 | 2012-08-01 | 贵阳供电局 | Transformer state evaluation method based on correlation analysis and variable weight coefficients |
| CN103926491A (en) * | 2014-04-21 | 2014-07-16 | 国家电网公司 | Transformer state evaluation method with influence of direct-current magnetic bias taken into account |
| CN107016500A (en) * | 2017-03-27 | 2017-08-04 | 国家电网公司 | Transformer fuzzy synthetic appraisement method based on variable weight |
Non-Patent Citations (3)
| Title |
|---|
| 楼新荣等: "SP合成型泡沫喷雾灭火系统在变压器消防中的应用", 《广东公安科技》 * |
| 潘志城 等: "换流变压器绝缘材料燃烧试验和防火能力研究", 《变压器》 * |
| 虞利强等: "高压细水雾灭火系统在世博地下变电所的应用", 《给水排水》 * |
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