CN112065705B - Fault monitoring device and monitoring method for submersible pump of forced oil circulation transformer - Google Patents
Fault monitoring device and monitoring method for submersible pump of forced oil circulation transformer Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 238000012806 monitoring device Methods 0.000 title abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 48
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 35
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 35
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 35
- 238000005259 measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 49
- 230000008901 benefit Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000011208 chromatographic data Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- 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
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2841—Gas in oils, e.g. hydrogen in insulating oils
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- Chemical Kinetics & Catalysis (AREA)
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- General Engineering & Computer Science (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to a fault monitoring device and a fault monitoring method for an oil-submersible pump of a forced oil circulation transformer, and the technical scheme is that an oil outlet of the oil-submersible pump is connected with an oil inlet of a main transformer through an oil pipeline, the oil pipeline is provided with a sampling port for collecting oil samples, the pipeline between the sampling port and the main transformer is provided with an outlet valve of the submersible pump, the pipeline connected with the inlet of the submersible pump is provided with an inlet valve of the submersible pump, the on-line monitoring device also comprises a transformer oil chromatographic tester for detecting the total hydrocarbon content of the dissolved gas in the oil sample taken out from the sampling port, the invention can realize the on-line measurement of the oil sample at the sampling port of the submersible pump in the running state to analyze the dissolved gas in the oil, whether the submersible pump is in a fault state or not is judged visually and effectively through data, the monitoring accuracy is high, reliable reference data are provided for equipment operation, and the fault judgment time length of the submersible pump of the forced oil circulation transformer is greatly shortened.
Description
Technical Field
The invention relates to a fault monitoring device and a fault monitoring method for a submersible pump of a forced oil circulation transformer.
Background
At present, a power plant main transformer and a transformer substation large-capacity main transformer can ensure that a transformer cooling system plays the maximum role, an oil-submersible pump is usually additionally arranged between main transformer bodies of a radiator, and the oil-submersible pump accelerates the flowing speed of oil flow, so that the cooling efficiency is improved. The submersible pump is installed between main transformer body and radiator, and submersible pump oil, radiator oil, main transformer body oil three are communicating, and the submersible pump motor inserts three phase current, and the motor rotor drives the oil stream and squeezes radiator oil into main transformer body through the submersible pump. When the submersible pump breaks down, the temperature of the fault position rises, so that oil at the position of the submersible pump is decomposed to generate corresponding dissolved gas, and the dissolved gas is pumped into the transformer body along with the submersible pump oil, so that the dissolved gas in the oil of the transformer body exceeds the standard. During the chromatographic detection of the transformer, the overproof of dissolved gas of the transformer can be detected, generally, chromatographic sampling ports are positioned at the upper, middle and lower parts of a main transformer, and oil at an oil-submersible pump is far away from the sampling ports of the main transformer. When the daily main transformer chromatographic data is analyzed abnormally, whether the fault is caused by the fault of the submersible pump or not can be checked, the submersible pump is started and stopped one by one (4 or more are usually) in the checking process, meanwhile, the correlation between the main transformer chromatographic data and the starting and stopping of the submersible pump is observed, the process usually lasts for several weeks or months, the running conditions of the transformer cannot be completely consistent in the judging process, the influences of variables such as load, environment temperature and the number of the started pumps (influencing the oil circulation speed) can be caused, the judging process is relatively complex, and the judging speed is slow. If the fault is not caused by the fault of the submersible pump, but is caused by the internal fault of the main transformer body, the fault can be continuously developed due to overlong judgment time, and the main transformer body fault is caused. Therefore, improvement and innovation thereof are imperative.
Disclosure of Invention
In view of the above situation, the present invention aims to provide a device and a method for monitoring the fault of a submersible pump of a forced oil circulation transformer, which can effectively solve the problem of rapid fault judgment of the submersible pump.
The technical scheme of the invention is as follows:
the utility model provides a forced oil circulation transformer submersible pump fault monitoring device, includes main transformer and submersible pump, and submersible pump's oil-out links to each other through the oil inlet of defeated oil pipe way with main transformer, defeated oil pipe is provided with the sample connection that is used for gathering oil appearance on the way, is provided with submersible pump outlet valve on the pipeline between sample connection and the main transformer, is provided with submersible pump inlet valve on the pipeline of submersible pump access connection, and this on-line monitoring device is still including the transformer oil chromatogram tester that is arranged in detecting the total hydrocarbon content of dissolved gas in the oil appearance that takes out from the sample connection.
The sampling port is connected with a sampling pipeline, and the sampling pipeline is provided with an opening and closing valve.
The sampling port is positioned on the oil pipeline close to the side of the submersible pump.
A fault monitoring method for a submersible pump of a forced oil circulation transformer comprises the following steps:
the method comprises the following steps: closing the submersible pump, closing an inlet valve of the submersible pump and an outlet valve of the submersible pump at the same time, standing for one day, taking a first oil sample through a sampling port on an oil pipeline between the submersible pump and the transformer body, simultaneously taking a second oil sample through an oil sample sampling port on the main transformer, and continuously sampling for 5-10 days;
step two: respectively analyzing the dissolved gas in the oil by the first oil sample and the second oil sample through a transformer oil chromatographic tester to respectively obtain the total hydrocarbon content of the dissolved gas in the first oil sample and the total hydrocarbon content of the dissolved gas in the second oil sample;
step three: and (3) comparing the data, namely comparing the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample which are sampled at the same time, and judging that the fault is the fault of the submersible pump under one of the following conditions:
a. the total hydrocarbon content of the dissolved gas in all the first oil samples in the sampling period is smaller than or larger than that of the dissolved gas in the second oil samples;
b. in the sampling period, three groups of continuous data of absolute values of the difference value of the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample sampled at the same time are more than 15% of the total hydrocarbon content of the dissolved gas in the second oil sample;
the steps of continuously sampling for 5-10 days are as follows: sampling for 1-2 times every day, and the interval is more than 6 hours each time; if the submersible pump is judged to be in fault, the submersible pump needs to be replaced in time.
The invention has novel and unique structure, is simple and reasonable, is easy to produce and operate, can be transformed on the basis of the existing transformer pipeline, and can realize the purpose of quickly judging whether the submersible pump has faults or not by adding one submersible pump sampling port. The method has the advantages that the fault monitoring of the submersible pump is carried out through data comparison, the oil sample at the sampling port of the submersible pump can be measured on line in the running state to analyze the dissolved gas in the oil, the content of the dissolved gas at the fault is obviously different from that of the dissolved gas at the peripheral position, the approximate fault position can be judged by monitoring the content of the dissolved gas at different positions, whether the submersible pump is in the fault state can be judged visually and effectively through data, the monitoring accuracy is high, reliable reference data are provided for equipment running, the fault judgment time length of the submersible pump of the forced oil circulation transformer is greatly shortened, the method is convenient to use, good in effect, is an innovative invention for judging whether the submersible pump of the forced oil circulation transformer is in the fault state, and has good social and economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of a submersible pump fault monitoring device of the present invention;
FIG. 2 is a graph showing the trend of the total hydrocarbon content of dissolved gas in an oil sample according to the present invention, which is determined by a conventional method;
FIG. 3 is a graph showing the trend of the total hydrocarbon content of dissolved gases in a first oil sample and a second oil sample according to the method of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The fault monitoring device for the submersible pump of the forced oil circulation transformer comprises a main transformer 5 and a submersible pump 1, wherein an oil outlet of the submersible pump is connected with an oil inlet of the main transformer 5 through an oil conveying pipeline 2, the oil conveying pipeline 2 is provided with a sampling port 7 for collecting an oil sample, a pipeline between the sampling port and the main transformer 5 is provided with an oil submersible pump outlet valve 6a, a pipeline connected with an inlet of the submersible pump 1 is provided with an oil submersible pump inlet valve 6b, and the on-line monitoring device further comprises a transformer oil chromatogram tester for detecting the content of total dissolved gas hydrocarbon in the oil sample taken out from the sampling port.
For guaranteeing the result of use, be connected with sample pipeline 3 on the sample connection, be provided with on-off valve 4 on the sample pipeline, when not taking a sample, the on-off valve is closed, does not influence normal work, open during the sample can.
The sample connection is located and is close to on the defeated oil pipe way 2 of diving the oil pump side, and the position of sample connection compares in the oil inlet of main transformer promptly, is more close to the oil-out of diving the oil pump, makes the sampling more representative.
A fault monitoring method for a submersible pump of a forced oil circulation transformer comprises the following steps:
the method comprises the following steps: closing the submersible pump (stopping the pump), closing an inlet valve 6b of the submersible pump and an outlet valve 6a of the submersible pump at the same time, standing for one day, taking a first oil sample through a sampling port 7 on an oil conveying pipeline between the submersible pump and the transformer body, simultaneously taking a second oil sample through an oil sample sampling port on the main transformer 5, and continuously sampling for 5-10 days;
step two: respectively analyzing the dissolved gas in the oil by the first oil sample and the second oil sample through a transformer oil chromatographic tester to respectively obtain the total hydrocarbon content of the dissolved gas in the first oil sample and the total hydrocarbon content of the dissolved gas in the second oil sample;
step three: and (3) comparing the data, namely comparing the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample which are sampled at the same time, and judging that the fault is the fault of the submersible pump under one of the following conditions:
a. the total hydrocarbon content of the dissolved gas in all the first oil samples in the sampling period is smaller than or larger than that of the dissolved gas in the second oil samples;
b. in the sampling period, three groups of continuous data of absolute values of the difference value of the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample sampled at the same time are more than 15% of the total hydrocarbon content of the dissolved gas in the second oil sample; if the submersible pump is judged to be in fault, the submersible pump needs to be replaced in time.
The steps of continuously sampling for 5-10 days are as follows: sampling is carried out 1-2 times per day with an interval of more than 6 hours.
The sampling quantity of the first oil sample and the second oil sample at each time can meet the requirement of detection of a transformer oil chromatographic tester, the sampling can be carried out 2 times every day in the first 3-5 days, and the subsequent sampling can be carried out once every day.
Transformer oil chromatogram tester is prior art, can be through carrying out the chromatographic test to the oil appearance, detects the volume of dissolved gas in the oil appearance, and dissolved gas component mainly includes in the oil: the content of methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide and carbon dioxide, wherein the content of the four gases of methane, ethane, ethylene and acetylene is called the total hydrocarbon content. The technology is the prior art, such as a transformer oil analysis gas chromatograph with model ZF-301 produced by Zhongzhong instruments incorporated in Henan.
The invention has novel and unique structure, is simple and reasonable, is easy to produce and operate, can be transformed on the basis of the existing transformer pipeline, and can realize the purpose of quickly judging whether the submersible pump has faults or not by adding one submersible pump sampling port. The method has the advantages that the fault monitoring of the submersible pump is carried out through data comparison, the oil sample at the sampling port of the submersible pump can be measured on line in the running state to analyze the dissolved gas in the oil, the content of the dissolved gas at the fault is obviously different from that of the dissolved gas at the peripheral position, the approximate fault position can be judged by monitoring the content of the dissolved gas at different positions, whether the submersible pump is in the fault state can be judged visually and effectively through data, the monitoring accuracy is high, reliable reference data are provided for equipment running, the fault judgment time length of the submersible pump of the forced oil circulation transformer is greatly shortened, the method is convenient to use, good in effect, is an innovative invention for judging whether the submersible pump of the forced oil circulation transformer is in the fault state, and has good social and economic benefits.
The transformer with the content of dissolved gas exceeding the standard in the same oil is judged on site by two judgment methods, namely a traditional method and the method of the invention:
1. the traditional method is adopted:
starting and stopping the submersible pump (the key point is to perform a start-stop test on one submersible pump), and observing the correlation between the change of chromatographic data in oil at a sampling port at the lower part of the main transformer and the start-stop of the oil pump. The data plot of the sampled oil samples is shown in FIG. 2, where the abscissa is time and the ordinate is total dissolved gas hydrocarbon content (. mu.L/L) in the oil sample.
As can be seen from the experimental data of fig. 2: the data of a sampling port at the lower part of the main transformer body is tracked, and the chromatographic data after the pump is stopped is basically stable and has a trend of small-amplitude reduction as seen from a curve. The submersible pump is then turned on, and the chromatographic data shows a clear upward trend from 489.48 to 754.23 once the submersible pump is turned on. So far, the corresponding relation of the starting and stopping of the submersible pump to the increase of the main transformer total hydrocarbon is quite clear. The reason that the main transformer total hydrocarbon exceeds the standard is the fault of the submersible pump, and fault gas generated by the fault of the submersible pump enters the transformer body along with the oil flow of the submersible pump, so that the appearance that the main transformer total hydrocarbon exceeds the standard is caused. The conventional method is used to determine a total of two months from pump stop at 11 days 4/11 in 2020 to 11 days 6/11 in 2020. In the process, the running conditions of the transformers are not completely consistent, the load, the ambient temperature, the number of pumps started (influencing the oil circulation speed) and other variables influence, the judgment process is relatively complex, and the judgment speed is slow.
2. The method comprises the following steps:
aiming at the content of dissolved gas in transformer oil exceeding the standard, manually closing valves at two sides of an oil-submerged pump (an oil-submerged pump inlet valve 6b and an oil-submerged pump outlet valve 6a), sampling and analyzing by adopting the method, comparing data of a first oil sample and a second oil sample taken out from a sampling port at the lower part of the transformer in 4 months, 15 days and 25 days, wherein a specific data comparison graph is shown in a graph 3, wherein a curve a is a data trend graph of the content of the total hydrocarbon of the dissolved gas in the second oil sample, a curve b is a data trend graph of the content of the total hydrocarbon of the dissolved gas in the first oil sample, and the data of the first oil sample is obviously different from the data of the second oil sample at the sampling port at the lower part of the main transformer according to the comparison graph in the graph 3, namely the content of the total hydrocarbon of the dissolved gas in all the first oil samples in a sampling period is smaller than the content of the total hydrocarbon of the dissolved gas in the second oil sample; meanwhile, the difference value of three groups of data which are continuous from 4 months 21 days to 4 months 23 days is more than 15 percent of the total hydrocarbon content of the dissolved gas in the second oil sample, so that the oil-submerged pump can be judged to have a fault, and the judgment time is greatly shortened. The applicant carries out a large number of comparative tests subsequently, when the submersible pump is normal, the content of the total hydrocarbon of the dissolved gas in the first oil sample is close to that of the total hydrocarbon of the dissolved gas in the second oil sample, and the numerical values are staggered up and down, all the tests of the fault of the submersible pump meet the judgment standard of the fault of the submersible pump, namely the content of the dissolved gas at the fault is obviously different from that at the peripheral position, the approximate position of the fault can be judged by monitoring the content of the dissolved gas at different positions, the method has the advantages that whether the submersible pump is in the fault state or not is judged visually and effectively through data, the monitoring accuracy is high, reliable reference data are provided for equipment operation, the fault judgment time length of the submersible pump of the forced oil circulation transformer is greatly shortened, the method is convenient to use and good in effect, the method is an innovative invention for judging whether the submersible pump of the forced oil circulation transformer is in the fault state or not, and good social and economic benefits are achieved.
Claims (2)
1. A fault monitoring method for a submersible pump of a forced oil circulation transformer is characterized by comprising the following steps:
the method comprises the following steps: closing the submersible pump, closing an inlet valve (6 b) and an outlet valve (6 a) of the submersible pump at the same time, standing for one day, taking a first oil sample through a sampling port (7) on an oil conveying pipeline between the submersible pump and the transformer body, simultaneously taking a second oil sample through an oil sample sampling port on a main transformer (5), and continuously sampling for 5-10 days;
step two: respectively analyzing the dissolved gas in the oil by the first oil sample and the second oil sample through a transformer oil chromatographic tester to respectively obtain the total hydrocarbon content of the dissolved gas in the first oil sample and the total hydrocarbon content of the dissolved gas in the second oil sample;
step three: and (3) comparing the data, namely comparing the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample which are sampled at the same time, and judging that the fault is the fault of the submersible pump under one of the following conditions:
a. the total hydrocarbon content of the dissolved gas in all the first oil samples in the sampling period is smaller than or larger than that of the dissolved gas in the second oil samples;
b. and in the sampling period, three groups of continuous data of absolute values of the difference value of the total hydrocarbon content of the dissolved gas in the first oil sample and the second oil sample sampled at the same time are more than 15% of the total hydrocarbon content of the dissolved gas in the second oil sample.
2. The method for monitoring the fault of the submersible pump of the forced oil circulation transformer as claimed in claim 1, wherein the steps of continuously sampling for 5-10 days are as follows: sampling is carried out 1-2 times per day with an interval of more than 6 hours.
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| CN112684307B (en) * | 2020-12-16 | 2023-03-17 | 中国科学院电工研究所 | Fault detection device for network side sleeve of converter transformer |
| CN113654837B (en) * | 2021-06-18 | 2022-12-06 | 国网山东省电力公司淄博供电公司 | Oil gas analog sampling device of transformer |
| CN114236102A (en) * | 2021-12-16 | 2022-03-25 | 扬州海通电子科技有限公司 | Method and device for monitoring real-time state of electric slip ring |
| CN114372063B (en) * | 2022-01-21 | 2022-08-12 | 华谱科仪(北京)科技有限公司 | Fault detection method based on chromatograph and electronic equipment |
| CN114965740A (en) * | 2022-04-19 | 2022-08-30 | 广东电网有限责任公司广州供电局 | Transformer oil pipe control method and transformer fault diagnosis method |
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| MY106598A (en) * | 1988-08-31 | 1995-06-30 | Australian Commercial Res & Development Ltd | Compositions and methods for drug delivery and chromatography. |
| CN104634894B (en) * | 2015-01-30 | 2017-01-18 | 国网河南禹州市供电公司 | Transformer oil-gas detection device |
| CN207020274U (en) * | 2017-05-15 | 2018-02-16 | 国网江西省电力公司电力科学研究院 | A kind of online oil chromatography is combined the device for judging transformer partial discharge with superfrequency |
| CN107656161A (en) * | 2017-11-14 | 2018-02-02 | 国网山东省电力公司电力科学研究院 | A kind of diagnostic method and system of natural esters Insulation Oil Transformer internal fault |
| CN111458595B (en) * | 2020-06-10 | 2024-05-28 | 国网山西省电力公司电力科学研究院 | On-line monitoring and identifying device for transformer fault induced by oil-submerged pump |
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