Methodology for monitoring the technical condition of GPU type GTK-25i in the process of operation

Abstract

In the early 1980s, 120 gas compressor units (GPU) type GTK-25i were installed on the Urengoy-Pomary-Uzhgorod transcontinental gas pipeline, and three of them are in operation at CS-39 “U-P-U” of the Bogorodchansk Linear Production Department of trunk gas pipelines. Today, about 80% of GPU type GTK-25i have worked out the established service life, or those close to it. Their further operation does not ensure reliable and efficient operation, and therefore numerous failures and accidents occur, leading to significant economic losses. Methods of parametric and vibroacoustic diagnostics of GPU are analyzed. It is noted that the most fruitful years of development of the methods of vibroacoustic diagnostics of GPUs are the 70-90s of the last century. Today, their development is taking place in the direction of using modern information technologies and various transformations in the processing of vibroacoustic processes to identify diagnostic signs of the technical state of the GPU. The methods of diagnosing GPU type GTK-25i the analysis showed their absence. The exception is certain methods of their diagnostics based on modern information technologies, which were developed by the authors of the article. At the same time, the carried out improvement of the automatic control system (ACS) of the GPU type GTK-25i in terms of its technical and software makes it possible to obtain information about additional, in comparison with the standard ACS, technological parameters of the GPU type GTK-25i operation and vibroacoustic processes that accompany its operation. and can be used to create diagnostic methods for GPU type GTK-25i. The methodology for monitoring the technical condition of GPU type GTK-25i based on the determination of the highest values of the discriminant functions for each of the three technical states of GPU type GTK-25i for 16 technological parameters and acoustic and vibration characteristics is considered. At the same time, the best "nominal" condition is considered to be the state of GPU type GTK-25i after the repair work, the "defective" state "- before the repair work, and" current "- after the corresponding operating time of the GPU type GTK-25i. The use of the technique made it possible to develop a complex method, which is a combination of parametric and vibroacoustic diagnostics methods. It is shown that the use of the proposed method allows tracing the trend of changes in the technical state of GPU type GTK-25i in time and predicting the moment of its decommissioning. The developed method does not require additional technical means for its implementation, as it receives information from the improved ACS GPU type GTK-25i, which, in turn, can use the diagnostic results to control the gas compression process, taking into account the technical condition of the GPU type GTK-25i.