In the power system, the transformer is an indispensable key equipment, and the condition of the transformer oil is directly related to the operation safety and life of the transformer. Therefore, it is essential to have regular testing of the transformer oil. This article will introduce the detection method of power transformer oil chromatograph in detail to help readers understand the principle, operation process and application of this technology in power maintenance.
1. The principle of transformer oil chromatograph detection technology.
The detection technology of transformer oil chromatograph is based on the analysis of dissolved gases in oil, and the type and severity of faults inside the transformer can be judged through qualitative and quantitative analysis of dissolved hydrocarbon gases (such as methane, ethylene, ethane, etc.) in transformer oil. These gases are usually generated when there is an internal fault in the transformer, such as overheating, arcing, etc.
Second, the operation process of transformer oil chromatograph detection.
Sampling: First, remove the appropriate sample of transformer oil from the transformer's sampling valve. The sampling process should ensure the cleanliness of the oil sample and avoid the interference of external impurities.
Pretreatment: The obtained oil sample needs to undergo certain pretreatment, such as degassing, purification, etc., to remove water and impurities in it and ensure the accuracy of the analysis results.
Chromatography: The pretreated oil sample is fed into a chromatograph for analysis. The chromatograph separates the components based on the difference in the partition coefficient between the stationary and mobile phases of different gases, and measures the concentration of each component through a detector.
Data processing and interpretation: The chromatograph will convert the analysis data into a spectrum, through which it can determine whether there is a fault inside the transformer, as well as the type and severity of the fault.
3. Application of transformer oil chromatograph detection in power maintenance.
Transformer oil chromatograph detection technology has become an important means of transformer fault diagnosis in power system. Through regular testing and analysis, potential faults inside the transformer can be found in time, providing decision-making basis for maintenance personnel to avoid accidents. In addition, the technology can be used for preventive maintenance of transformers to extend the service life of transformers.
IV. Conclusion. With its accurate and fast characteristics, the detection technology of power transformer oil chromatograph plays an increasingly important role in the maintenance of power system. With the continuous progress of technology, it is believed that more intelligent and automated detection methods will be applied to the detection of transformer oil in the future, providing a more solid guarantee for the safe and stable operation of the power system.