CN114530826B - Transformer light gas protection method and system based on concentration characteristics of organic gas - Google Patents
Transformer light gas protection method and system based on concentration characteristics of organic gas Download PDFInfo
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- CN114530826B CN114530826B CN202111627221.8A CN202111627221A CN114530826B CN 114530826 B CN114530826 B CN 114530826B CN 202111627221 A CN202111627221 A CN 202111627221A CN 114530826 B CN114530826 B CN 114530826B
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- 238000000034 method Methods 0.000 title claims abstract description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 160
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims abstract description 89
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims abstract description 89
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims abstract description 80
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000005977 Ethylene Substances 0.000 claims abstract description 80
- 230000008859 change Effects 0.000 claims description 12
- 230000015654 memory Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 116
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
Abstract
The invention discloses a transformer light gas protection method and a system based on the concentration characteristic of organic gas, which effectively identify the condition of false protection alarm caused by the external gas inlet of a transformer by utilizing the characteristic that the external gas inlet does not contain organic gas and the internal fault gas production of the transformer contains organic gas, thereby avoiding false protection action; meanwhile, based on the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the preset time period T in the past, the judgment of the light gas protection tripping signal is carried out, and compared with the traditional gas volume quantity criterion, the method can sensitively sense fault information before the gas volume quantity reaches the original rated threshold value, and improves the protection reliability, the rapidity and the sensitivity.
Description
Technical Field
The invention relates to a transformer light gas protection method and system based on organic gas concentration characteristics, and belongs to the technical field of protection of oil immersed transformers.
Background
The transformer light gas protection is mainly applied to early detection of faults in the transformer, and compared with the transformer electric quantity protection, the non-electric quantity protection generated by reacting fault gas can identify fault development characteristics in a slight fault stage, so that the running state of a protection object can be more sensitively, directly and comprehensively reflected.
The existing light gas protection utilizes the principle of heat generation and vaporization of insulating oil generated by internal faults of an oil immersed transformer, and judges whether the volume of gas reaches a threshold value or not through a mechanical structure. Under the condition of external air intake, the method is easy to cause protection misoperation, and the light gas protection sensitivity is low due to single criterion.
Disclosure of Invention
The invention provides a transformer light gas protection method and system based on the concentration characteristics of organic gas, which solve the problems of easy protection misoperation and low sensitivity of the existing method.
In order to solve the technical problems, the invention adopts the following technical scheme:
a transformer light gas protection method based on organic gas concentration characteristics, comprising:
in response to detecting that the rate of change of the volume of gas in the gas collecting box is greater than a rate threshold, taking the current moment as the cut-off moment of the preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T;
and judging the light gas protection tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene.
And judging a light gas protection trip signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene, wherein the light gas protection trip signal comprises the following steps:
judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene;
and judging the instantaneous trip signal of the light gas protection according to the average concentration of the acetylene.
And judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene, wherein the method comprises the following steps:
under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay A tripping signal;
when the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal;
under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; wherein A > B > C.
According to the average concentration of acetylene, the judgment of the instantaneous trip signal of light gas protection is carried out, and the method comprises the following steps:
and if the average acetylene concentration is greater than or equal to the acetylene concentration threshold, the instantaneous trip signal is thrown in the light gas protection.
A transformer light gas protection system based on organic gas concentration characteristics, comprising:
the calculation module: in response to detecting that the rate of change of the volume of gas in the gas collecting box is greater than a rate threshold, taking the current moment as the cut-off moment of the preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T;
and a judging module: and judging the light gas protection tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene.
The judging module comprises:
and (3) time delay judgment: judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene;
and (5) instantaneous judgment: and judging the instantaneous trip signal of the light gas protection according to the average concentration of the acetylene.
The time delay judgment comprises the following steps:
delay A tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay A tripping signal;
and (3) delay B trip judgment: when the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal;
and (3) delay C tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; wherein A > B > C.
The instantaneous judgment of the casting comprises the following steps:
judging instantaneous trip: and if the average acetylene concentration is greater than or equal to the acetylene concentration threshold, the instantaneous trip signal is thrown in the light gas protection.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a transformer light gas protection method based on an organic gas concentration characteristic.
A computing device comprising one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing a transformer light gas protection method based on an organic gas concentration characteristic.
The invention has the beneficial effects that: according to the invention, the characteristics that the external air inlet does not contain organic gas, and the internal fault gas production of the transformer contains organic gas are utilized, so that the condition of protection false alarm caused by the external air inlet of the transformer is effectively identified, and the protection false operation is avoided; meanwhile, based on the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the preset time period T in the past, the judgment of the light gas protection tripping signal is carried out, and compared with the traditional gas volume quantity criterion, the method can sensitively sense fault information before the gas volume quantity reaches the original rated threshold value, and improves the protection reliability, the rapidity and the sensitivity.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of the installation of a concrete object;
fig. 3 is a conventional radial grid.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the transformer light gas protection method based on the concentration characteristics of the organic gas comprises the following steps:
step 1, in response to detection that the rate of change of the gas volume in the gas collecting box is greater than a rate threshold, taking the current moment as the cut-off moment of a preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T;
and step 2, judging a light gas protection tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene.
The method is directly applied to the light gas relay, and the method utilizes the characteristics that the external air inlet does not contain organic gas, and the internal fault gas production of the transformer contains organic gas, so that the condition of protection false alarm caused by the external air inlet of the transformer is effectively identified, and the protection false action is avoided; meanwhile, based on the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the preset time period T in the past, the judgment of the light gas protection tripping signal is carried out, and compared with the traditional gas volume quantity criterion, the method can sensitively sense fault information before the gas volume quantity reaches the original rated threshold value, and improves the protection reliability, the rapidity and the sensitivity.
As shown in fig. 2, the gas volume in the gas collecting box can be collected by the magnetostrictive liquid level meter in the light gas relay, the gas volume change rate is calculated, when the gas volume change rate is greater than the rate threshold, the light gas protection is started, and the rate threshold is generally set to be 20ml/h according to the gas production rule of the internal defects of the transformer.
In the development process of the internal short circuit fault of the transformer, the proportion relation of four organic gases of methane, ethane, ethylene and acetylene in the total gas yield changes along with the temperature, wherein the temperature of the gas production position increases along with the aggravation of the severity of the fault. The methane, ethane, ethylene, acetylene concentrations are thus measured here primarily.
When the detected gas volume change rate is greater than the rate threshold, taking the current moment as the cut-off moment of the preset duration T; the current time is the time when the gas volume change rate is detected to be greater than the rate threshold, and the preset time period T is generally 5 seconds according to the actual situation.
Based on the real-time measured methane, ethane, ethylene and acetylene concentrations, the average methane concentration, the average ethane concentration, the average ethylene concentration and the average acetylene concentration in the preset time period T can be calculated by adopting the following formulas:
wherein P is avg For the average concentration of the gas in the past preset time period T, N is the measurement times in the past preset time period T, P i The gas concentration obtained for the ith measurement.
According to the calculated average concentration, judging a light gas protection trip signal, wherein the light gas protection trip signal comprises a light gas protection trip delay signal and a light gas protection trip instantaneous signal; the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene can be used for judging the time delay tripping signal, and as the fault temperature/power rises, fault characteristic gas is converted from ethane, methane and ethylene into acetylene, so that the average concentration of acetylene can be used for judging the instantaneous tripping signal.
According to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene, the light gas protection throw-in time delay tripping signal judgment is carried out, and the process is generally as follows:
11 Under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown to a preset time delay A tripping signal; the preset delay A is set to be half an hour based on the rule of experience of fault development.
The criteria described above can be expressed using the following formula:
F＝{A and(not B)and(not C)and(not D)}
or{(not A)and B and(not C)and(not D)}
or{(not A)and(not B)and C and(not D)}
wherein F represents a light gas protection delay trip signal of half an hour;
criterion A:wherein (1)>For the average concentration of methane in the gas collection box in the preset time period T in the past, <>Is a methane concentration threshold;
criterion B:wherein (1)>For the average concentration of ethane in the gas collection box in the preset time period T in the past, <>Is the ethane concentration threshold;
criterion C:wherein (1)>For the average concentration of ethylene in the gas collection box in the preset time period T in the past, < >>Is an ethylene concentration threshold;
criterion D:wherein (1)>For the average concentration of acetylene in the gas collection box in the preset time period T in the past, < >>Is the acetylene concentration threshold.
12 Under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal; the preset delay B is set to be ten minutes based on a fault development experience rule.
The criteria described above can be expressed using the following formula:
F1＝{A and B and(not C)and(not D)}
or{(not A)and B and C and(not D)}
or{A and(not B)and C and(not D)}
wherein F1 represents a light gas protection delay trip signal of ten minutes.
13 Under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; the preset delay C is set to be five minutes based on a fault development experience rule.
The criteria described above can be expressed using the following formula:
F2＝{A and B and C and(not D)}
wherein F2 represents a light gas protection delay trip signal of five minutes.
According to the average concentration of acetylene, the instantaneous trip signal judgment of light gas protection is carried out, and the process is generally as follows:
21 If the average concentration of acetylene is greater than or equal to the threshold value of the concentration of acetylene, the instantaneous trip signal is thrown in the light gas protection.
The criteria described above can be expressed using the following formula:
F3＝D
wherein F3 represents a light gas protection trip signal.
Fig. 3 shows a conventional radial power grid comprising an oil immersed transformer T 1 And T 2 The radial power grid is externally connected with a lower-level line and a load, and is shown as an oil immersed transformer T 1 For example, a magnetostrictive liquid level meter is adopted to collect the gas volume in a gas collecting box, the gas volume change rate is calculated, when the gas volume change rate is greater than a rate threshold value, light gas protection is started, based on the concentration of methane, ethane, ethylene and acetylene measured in real time, the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in a preset time period T can be calculated, and according to the judgment process, the light gas protection casting delay time can be determined for half an hourTrip signal, light gas protection trip signal of ten minutes delay, light gas protection trip signal of five minutes delay or light gas protection trip signal of instantaneous trip.
Based on the same inventive concept, the embodiment of the application also provides a transformer light gas protection system based on the concentration characteristic of the organic gas, which is a software system of the method, comprising:
the calculation module: and in response to detecting that the rate of change of the gas volume in the gas collecting box is greater than the rate threshold, taking the current moment as the cut-off moment of the preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T.
And a judging module: and judging the light gas protection tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene.
The judging module comprises:
and (3) time delay judgment: judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene;
the time delay judgment comprises the following steps:
delay A tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay A tripping signal;
and (3) delay B trip judgment: when the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal;
and (3) delay C tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; wherein A > B > C.
And (5) instantaneous judgment: according to the average concentration of acetylene, judging an instantaneous trip signal of light gas protection;
the instantaneous judgment of the casting comprises the following steps:
judging instantaneous trip: and if the average acetylene concentration is greater than or equal to the acetylene concentration threshold, the instantaneous trip signal is thrown in the light gas protection.
Based on the same inventive concept, embodiments of the present application also provide a computer-readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a transformer light gas protection method based on an organic gas concentration characteristic.
Based on the same inventive concept, embodiments of the present application also provide a computing device comprising one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing a transformer light gas protection method based on an organic gas concentration characteristic.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as providing for the use of additional embodiments and advantages of all such modifications, equivalents, improvements and similar to the present invention are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (8)
1. The transformer light gas protection method based on the concentration characteristics of the organic gas is characterized by comprising the following steps of:
in response to detecting that the rate of change of the volume of gas in the gas collecting box is greater than a rate threshold, taking the current moment as the cut-off moment of the preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T;
judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene;
and judging the instantaneous trip signal of the light gas protection according to the average concentration of the acetylene.
2. The method for protecting light gas of a transformer based on the concentration characteristics of organic gas according to claim 1, wherein the light gas protection delay trip signal judgment is performed according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene, comprising:
under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay A tripping signal;
when the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal;
under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; wherein A > B > C.
3. The transformer light gas protection method based on the concentration characteristics of the organic gas according to claim 1, wherein the light gas protection trip signal judgment is performed according to the average concentration of acetylene, comprising:
and if the average acetylene concentration is greater than or equal to the acetylene concentration threshold, the instantaneous trip signal is thrown in the light gas protection.
4. Transformer light gas protection system based on organic gas concentration characteristic, characterized by comprising:
the calculation module: in response to detecting that the rate of change of the volume of gas in the gas collecting box is greater than a rate threshold, taking the current moment as the cut-off moment of the preset duration T, and calculating the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene in the past preset duration T;
and (3) time delay judgment: judging a light gas protection delay tripping signal according to the average concentration of methane, the average concentration of ethane, the average concentration of ethylene and the average concentration of acetylene;
and (5) instantaneous judgment: and judging the instantaneous trip signal of the light gas protection according to the average concentration of the acetylene.
5. The transformer light gas protection system based on organic gas concentration characteristics of claim 4, wherein the throw-delay determination comprises:
delay A tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay A tripping signal;
and (3) delay B trip judgment: when the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane and the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, or the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene and the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the light gas protection is thrown to a preset delay B tripping signal;
and (3) delay C tripping judgment: under the condition that the average concentration of acetylene is smaller than the threshold value of the concentration of acetylene, if the average concentration of methane is larger than or equal to the threshold value of the concentration of methane, the average concentration of ethane is larger than or equal to the threshold value of the concentration of ethane, and the average concentration of ethylene is larger than or equal to the threshold value of the concentration of ethylene, the light gas protection is thrown with a preset delay C tripping signal; wherein A > B > C.
6. The transformer light gas protection system based on organic gas concentration characteristics of claim 4, wherein the transient determination comprises:
judging instantaneous trip: and if the average acetylene concentration is greater than or equal to the acetylene concentration threshold, the instantaneous trip signal is thrown in the light gas protection.
7. A computer readable storage medium storing one or more programs, characterized by: the one or more programs include instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-3.
8. A computing device, comprising:
one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods of claims 1-3.
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