Method for testing long-term operation reliability of on-line monitoring device for dissolved gas in oil

Abstract

The invention discloses a method for testing the long-term operation reliability of an online monitoring device for dissolved gas in oil, and relates to the technical field of dissolved gas measurement. The method is carried out by using a high-temperature and high-humidity control box, an online monitoring device for dissolved gas in oil and an oil sample storage tank. The method comprises the following steps: placing the online monitoring device for the dissolved gas in the oil in the high-temperature and high-humidity control box, wherein the temperature and humidity of a test environment is controlled in the high-temperature and high-humidity control box, and the oil sample storage tank is used for storing a test oil sample; enabling the oil sample storage tank to be connected with theonline monitoring device for the dissolved gas in the oil through a test oil pipe; carrying out long-term operation reliability test on the online monitoring device for the dissolved gas in the oil under set test conditions, and judging the long-term operation reliability of the online monitoring device for the dissolved gas in the oil according to a test result of the long-term operation reliability test. According to the invention, the long-term operation condition of the device in a severe test environment can be simulated so as to test the long-term operation reliability of the device.

Description

technical field [0001] The invention relates to the technical field of dissolved gas measurement, in particular to a method for testing the reliability of long-term operation of an online monitoring device for dissolved gas in oil. Background technique [0002] At present, online monitoring devices for dissolved gas in transformer oil are widely used in oil-filled equipment in the power industry. The coverage rate of 220kV and above equipment reaches 95%, and oil-filled equipment with 110kV and below is also gradually becoming popular. [0003] Through a large number of statistical analysis, it is found that the performance of online monitoring devices for dissolved gas in oil is generally poor, and there are several types of abnormalities such as data anomalies, communication interruptions, component damage, false positives and negative negatives. Some data show that even after the device has passed a series of tests such as type test and arrival acceptance, the abnormal ra...

AI Technical Summary

Problems solved by technology

[0007] After the device is installed on site, it has to go through the test of long-term high temperature and high humidity on site. The high temperature and high humidity environment has a serious impact on the long-term operation stability of the electronic components inside the online dissolved gas in oil monitoring device, resulting in continuous decline in device performance.

After the device operates in such a harsh environment for a period of time, many quality problems that cannot be exposed in the short term may become prominent, resulting in a rapid increase in the abnormal rate of the device

[0008] At present, in the major industry standards and national standards in China, there is no test on the long-term operation stability of the device in the test of the online monitoring device for dissolved gas in oil, which often leads to the device passing the type test, factory test, and delivery test, but it is in operation within 1 year. frequent exceptions

Images