Abstract
Centrifugal compressors are an integral part of modern production in such industries as gas transmission, oil refining, metallurgical, machine-building, mining, as well as in electric and heat power engineering. Interruptions in the operation or failures of compressors lead to decrease in profit or large material loss. Conditions should be created for the safe (stable) operation of centrifugal compressors. Surge is global (complete) loss of stability, an unacceptable phenomenon for a centrifugal compressor. Compressor surge protection must function during operation. The algorithms used to protect centrifugal compressors against surge have some drawbacks, which makes it impossible to reliably prevent surges. There are many methods for analyzing rapidly changing processes in the flow part of a centrifugal compressor. The wavelet theory is the most accurate and modern method. The use of the wavelet transform method for signal processing allows us to solve the problems of analyzing non-stationary processes of a centrifugal compressor to expand the acceptable range of work and build reliable operation of the anti-surge diagnostic system. In the future, it is possible to use other basic wavelet functions, for comparison and selection of the most suitable one, for the analysis of unsteady signals in a centrifugal compressor.
Highlights
Further development of the centrifugal compressors[112] design is associated with increases in rotor rotational velocities, and as a result of loads on structural elements and plant capacities, while maintaining a sufficient level of operational safety both from the strength of the nodes and the stability of the performance
One of the causes of accidents on the compressor is getting into the surge due to an inoperative surge protection system, or not being able to take into account all the factors affecting the compressor in the surge state
It is difficult to take into account the wide range of some networks parameters over time when designing, even using modern methods for modeling compressor characteristics, since the compressor, firstly, does not work in one mode, and secondly, there are settings on the compressor characteristics that limit the zone work
Summary
Further development of the centrifugal compressors[112] design is associated with increases in rotor rotational velocities, and as a result of loads on structural elements and plant capacities, while maintaining a sufficient level of operational safety both from the strength of the nodes and the stability of the performance. For centrifugal compressor units, control and automation systems are needed that allow monitoring the gas state in the flow part in real time, this is only possible with systems based on the analysis of non-stationary processes. It is difficult to take into account the wide range of some networks parameters over time when designing, even using modern methods for modeling compressor characteristics, since the compressor, firstly, does not work in one mode, and secondly, there are settings on the compressor characteristics that limit the zone work. In addition to ensuring more stable operation of the compressor unit when using a system based on the criterion method of surge protection, for a certain number of compressor units it becomes possible to significantly increase the average efficiency due to the reduction of the operating time at energydisadvantageous modes. The objectives of this work: 1. Development of principles and the selection of informative conditions for building a robust (fast, highquality and reliable) and affordable (acceptable) algorithm for protecting a centrifugal compressor
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