CN111551695A - Long-term operation reliability test method for online monitoring device for dissolved gas in oil - Google Patents
Long-term operation reliability test method for online monitoring device for dissolved gas in oil Download PDFInfo
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- CN111551695A CN111551695A CN202010326432.7A CN202010326432A CN111551695A CN 111551695 A CN111551695 A CN 111551695A CN 202010326432 A CN202010326432 A CN 202010326432A CN 111551695 A CN111551695 A CN 111551695A
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Abstract
The invention discloses a long-term operation reliability test method for an online monitoring device for gas dissolved in oil, which relates to the technical field of dissolved gas measurement and is carried out by utilizing a high-temperature high-humidity control box, an online monitoring device for gas dissolved in oil and an oil sample storage tank. The invention can simulate the long-term operation condition of the device in a severe test environment so as to test the long-term operation reliability of the device.
Description
Technical Field
The invention relates to the technical field of dissolved gas measurement, in particular to a long-term operation reliability testing method for an online monitoring device for dissolved gas in oil.
Background
At present, the online monitoring device for the dissolved gas in the transformer oil is widely applied to oil-filled equipment in the power industry, the coverage rate of the equipment with the voltage of 220kV or more reaches 95%, and the oil-filled equipment with the voltage of 110kV or less is gradually popularized.
A large number of statistical analyses find that the performance of the on-line monitoring device for the dissolved gas in the oil is generally poor, and the on-line monitoring device has several types of abnormalities such as data abnormity, communication interruption, component damage, false alarm and missing report. Data show that the device can be up to 40% abnormal rate in the first year of operation when installed in a field even after a series of tests such as type test, arrival acceptance and the like.
The analysis reason mainly comprises the following aspects:
the existing evaluation mode of the device is mainly based on experimental conclusions such as type tests, delivery tests and delivery tests, and the experimental conclusions can only indicate the performance of the device under the test condition and cannot reflect the stability and reliability of the device in long-term operation. The long-term operation of the device is influenced by the quality of components, the temperature and humidity change of the field operation environment, the aging of components, the aging of gasoline road sealing materials, software design and other factors, and the performance is reduced.
In the aspect of software testing, currently, the software standardization testing is more emphasized, communication data are required to be stable and reliable for a long time when a device operates on site, and the reliability design of software is tested more comprehensively.
After the device is installed on site, the on-site long-term high-temperature and high-humidity alternation tests show that the high-temperature and high-humidity environment has serious influence on the long-term operation stability of each electronic component in the on-line monitoring device for the gas dissolved in the oil, so that the performance of the device is continuously reduced. After the device has been operated in such a harsh environment for a period of time, many quality problems that cannot be exposed for a short period of time may be evident, resulting in a rapid increase in the rate of device anomalies.
At present, in various domestic industrial standards and national standards, the test of the online monitoring device for the dissolved gas in the oil does not relate to the test of the long-term operation stability of the device, so that the device passes a type test, a delivery test and a delivery test, but frequently generates abnormity within 1 year of operation.
Disclosure of Invention
The invention provides a method for testing the long-term running reliability of an online monitoring device for gas dissolved in oil, aiming at solving the problem that the testing of the online monitoring device for gas dissolved in oil does not relate to the testing of the long-term running stability of the device in the domestic industrial standard and the national standard in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a long-term operation reliability test method for an online monitoring device for gas dissolved in oil is carried out by utilizing a high-temperature high-humidity control box, the online monitoring device for gas dissolved in oil and an oil sample storage tank, and comprises the following steps:
the online monitoring device for the gas dissolved in the oil is placed in the high-temperature high-humidity control box, the temperature and the humidity of a test environment are controlled in the high-temperature high-humidity control box, the oil sample storage tank is used for storing a test oil sample, the oil sample storage tank is connected with the online monitoring device for the gas dissolved in the oil through a test oil pipe, the online monitoring device for the gas dissolved in the oil is subjected to long-term operation reliability test under a set test condition, and the long-term operation reliability of the online monitoring device for the gas dissolved in the oil is judged according to a test result of the long-term operation reliability test;
wherein the test conditions are as follows: the temperature in the high-temperature high-humidity control box is more than 60 ℃, and the humidity range is as follows: 85-100%, the testing frequency is 8-12 times/day, and the testing period is 30 days; the judging method comprises the following steps: abnormal working phenomenon occurs, or whether the measurement accuracy, the measurement repeatability and the minimum detection period in the test result reach a set standard DL/T1432 part 2 of the inspection specification of the online monitoring device for the power transformation equipment: and C-level and above standards in transformer oil dissolved gas online monitoring devices.
The method for testing the long-term operation reliability of the online monitoring device for the gas dissolved in the oil further comprises the step of testing the long-term operation reliability of the online monitoring device for the gas dissolved in the oil at the temperature ranging from 60 ℃ to 65 ℃.
The method for testing the long-term operation reliability of the online monitoring device for the gas dissolved in the oil further comprises the following steps of setting the standard as DL/T1432 part of the inspection specification 2 of the online monitoring device for the transformer equipment: online monitoring device for dissolved gas in transformer oil
The method for testing the long-term operation reliability of the online monitoring device for the gas dissolved in the oil further comprises the step of performing abnormal working phenomena including dead halt, oil leakage or any other abnormal working states.
Compared with the prior art, the invention has the beneficial effects that: the long-term operation reliability of the online monitoring device for the dissolved gas in the nuclear oil cannot be considered by the existing standard or method, the device is rapidly aged through a severe test at high temperature, high humidity, high frequency and long time, the operation of the device for nearly 1 year is carried out in an equivalent manner, and if the quality of the device is poor, the device is exposed in advance. And the long-term operation reliability of the online monitoring device for the dissolved gas in the oil is detected through high-temperature high-humidity high-frequency long-term test.
Drawings
FIG. 1 is a schematic diagram of a long-term stability test of an online monitoring device for dissolved gas in oil.
Wherein, 1, a high-temperature high-humidity control box; 2. an on-line monitoring device for dissolved gas in oil; 3. testing an oil pipe; 4. oil sample holding vessel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
referring to fig. 1, a method for testing long-term operation reliability of an online monitoring device for gas dissolved in oil includes a high-temperature high-humidity control box 1, an online monitoring device for gas dissolved in oil 2, and an oil sample storage tank 4, where the online monitoring device for gas dissolved in oil 2 is placed in the high-temperature high-humidity control box 1, the temperature and humidity of a test environment are controlled in the high-temperature high-humidity control box 1, the oil sample storage tank 4 is used for storing a test oil sample, the oil sample storage tank 4 is connected with the online monitoring device for gas dissolved in oil 2 through a test oil pipe 3, the online monitoring device for gas dissolved in oil 2 is tested for long-term operation reliability under a set test condition, and the long-term operation reliability of the online monitoring device for gas dissolved in oil 2 is determined according to a test result of the long-term operation reliability test, where the test condition is: the temperature in the high-temperature high-humidity control box 1 is more than 60 ℃, and the humidity range is as follows: 85-100%, the testing frequency is 8-12 times/day, and the testing period is 30 days; the judging method comprises the following steps: and abnormal working occurs, or whether the measurement accuracy, the measurement repeatability and the minimum detection period in the test result reach the set standard or not.
In this embodiment, the online monitoring device 2 for the dissolved gas in the oil to be tested is placed in the high-temperature high-humidity control box 1, and the test oil sample is placed outside the high-temperature box. The device continuously operates for a long time at high frequency under the condition of high temperature and high humidity, and the long-term operation condition of the device under a severe test environment is simulated to test the reliability of the long-term operation of the device. The testing device comprises 4 parts, and the high-temperature high-humidity control box 1 is used for testing and controlling the temperature and the humidity of the environment; the on-line monitoring device 2 for the gas dissolved in the oil is a device to be tested; the test oil pipe 3 is used for connecting the test device with the oil sample storage tank 4, and the oil sample storage tank 4 is used for storing the test oil sample.
And (3) testing conditions are as follows:
(1) the temperature of the high-temperature high-humidity control box is set to be more than 60 ℃, preferably 60-65 ℃, the temperature selection principle is that the temperature of the high-temperature high-humidity control box is in a transformer installation site, and when the environment is high in summer, the maximum temperature of the operation environment of the on-line monitoring device for the dissolved gas in the oil can reach 60-65 ℃ due to long-term heat dissipation of the transformer. The settings were 60-65 c to simulate the maximum operating temperature. The humidity is more than 85-100%. When the temperature is high in summer, the humidity of the natural environment can reach 85-100%.
(2) The test frequency is 8-12 times/day, the on-line monitoring device for the dissolved gas in the conventional oil adopts a rapid degassing mode, the minimum detection period of the device is usually less than 2 hours, and if the test is carried out at the frequency of 8-12 times/day, the device is in a high-strength working state.
(3) The test period is selected for 30 days, and the tests are carried out according to the frequency of 8-12 times/day, so that the online monitoring device for the gas dissolved in the oil achieves the total test frequency of 0.7-1.0 year when the device normally works in the test period of 30 days.
Judging conditions:
(1) after the device runs for a long time at high temperature, high humidity and high frequency, if the device has any abnormal working phenomena such as dead halt, leakage oil and the like, the long-term stability of the device is poor, and the test is unqualified.
(2) After the device runs at high temperature, high humidity, high frequency and long time, the measurement accuracy, the measurement repeatability and the minimum detection period of the measurement device are 3 items, for example, the measurement accuracy and the measurement repeatability of the device and the minimum detection period cannot reach the part 2 of the inspection specification of the on-line monitoring device of the power transformation equipment of DL/T1432: and if the standard of C level in the standard of an online monitoring device for the dissolved gas in the transformer oil meets the requirement, the test is unqualified. The method for testing the measurement accuracy, the measurement repeatability and the minimum detection period is based on the part 2 of the inspection specification of the online monitoring device for the transformer equipment, DL/T1432 standard of the power industry of the people's republic of China: the standard of an online monitoring device for the dissolved gas in the transformer oil is developed.
The invention is characterized in that the existing standard or method can not consider the long-term operation reliability of the on-line monitoring device for the gas dissolved in the nuclear oil, the method passes the severe test of high temperature, high humidity, high frequency and long time, the device is rapidly aged, the operation of the device for nearly 1 year is carried out in equal quantity, and if the device has quality problems, the device can be exposed in advance. And the long-term operation reliability of the online monitoring device for the dissolved gas in the oil is detected through high-temperature high-humidity high-frequency long-term test.
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 (4)
1. A long-term operation reliability test method for an online monitoring device for gas dissolved in oil is carried out by utilizing a high-temperature high-humidity control box, the online monitoring device for gas dissolved in oil and an oil sample storage tank, and is characterized by comprising the following steps:
the online monitoring device for the gas dissolved in the oil is placed in the high-temperature high-humidity control box, the temperature and the humidity of a test environment are controlled in the high-temperature high-humidity control box, the oil sample storage tank is used for storing a test oil sample, the oil sample storage tank is connected with the online monitoring device for the gas dissolved in the oil through a test oil pipe, the online monitoring device for the gas dissolved in the oil is subjected to long-term operation reliability test under a set test condition, and the long-term operation reliability of the online monitoring device for the gas dissolved in the oil is judged according to a test result of the long-term operation reliability test;
wherein the test conditions are as follows: the temperature in the high-temperature high-humidity control box is more than 60 ℃, and the humidity range is as follows: 85-100%, the testing frequency is 8-12 times/day, and the testing period is 30 days; the judging method comprises the following steps: and abnormal working occurs, or whether the measurement accuracy, the measurement repeatability and the minimum detection period in the test result reach the set standard or not.
2. The method for testing the long-term operation reliability of the device for on-line monitoring of the dissolved gas in the oil according to claim 1, wherein the temperature range is 60-65 ℃.
3. The method for testing the long-term operation reliability of the online monitoring device for the gas dissolved in the oil as claimed in claim 1, wherein the set standard is part 2 of the DL/T1432-2016 transformer equipment online monitoring device inspection specification: and C-level and above standards in the online monitoring device for the dissolved gas in the transformer oil.
4. The method for testing the long-term operation reliability of the device for on-line monitoring of the dissolved gas in the oil according to claim 1, wherein the abnormal working phenomena comprise dead halt and oil leakage.
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| CN202010326432.7A CN111551695A (en) | 2020-04-23 | 2020-04-23 | Long-term operation reliability test method for online monitoring device for dissolved gas in oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111439A (en) * | 2014-07-08 | 2014-10-22 | 深圳供电局有限公司 | Accelerating service life test device for electronic electrical-energy meters |
| CN104820201A (en) * | 2015-04-23 | 2015-08-05 | 国网上海市电力公司 | Acquisition terminal performance index evaluation method |
| CN107807229A (en) * | 2017-10-23 | 2018-03-16 | 国网电力科学研究院武汉南瑞有限责任公司 | The cryogenic property detecting system and its detection method of a kind of Gases Dissolved in Transformer Oil on-Line Monitor Device |
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2020
- 2020-04-23 CN CN202010326432.7A patent/CN111551695A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111439A (en) * | 2014-07-08 | 2014-10-22 | 深圳供电局有限公司 | Accelerating service life test device for electronic electrical-energy meters |
| CN104820201A (en) * | 2015-04-23 | 2015-08-05 | 国网上海市电力公司 | Acquisition terminal performance index evaluation method |
| CN107807229A (en) * | 2017-10-23 | 2018-03-16 | 国网电力科学研究院武汉南瑞有限责任公司 | The cryogenic property detecting system and its detection method of a kind of Gases Dissolved in Transformer Oil on-Line Monitor Device |
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