Compressor adaptive performance curve generation method

Abstract

The invention discloses a compressor adaptive performance curve generation method. The method comprises: obtaining a centrifugal compressor design performance curve and converting the centrifugal compressor design performance curve into a numerical form; obtaining theoretical performance parameters under actual working conditions by utilizing a similarity theory; establishing a performance curve mapping relation according to an ANFIS algorithm, and calculating theoretical performance parameters of all rotating speeds; combining historical operation data of the compressor, introducing a performance curve degradation factor, performing calculating by using a least square method to obtain a value of the degradation factor, and correcting theoretical performance parameters of all rotating speeds through the degradation factor; determining a stable working parameter range of the centrifugal compressor to obtain a compressor surge and blockage boundary curve; and finally generating actual performance curves of all rotating speeds of the centrifugal compressor under actual working conditions. Performance curves of all rotating speeds of the centrifugal compressor under actual working conditions can be accurately obtained, a stable working interval of the centrifugal compressor in actual operation is determined, and operation parameters of the compressor are adjusted according to the stable working interval.

Description

technical field [0001] The invention relates to a method and method for generating an adaptive performance curve of a compressor, belonging to the technical field of compressors. Background technique [0002] Pipeline transportation is one of the most effective methods of natural gas transportation. Centrifugal compressors are the most important power equipment in the long-distance natural gas pipeline system, and they are also the main energy-consuming equipment, which has a great impact on the efficient and safe operation of the pipeline. Therefore, accurately mastering the performance parameters of the compressor in actual operation and production is the basis for the optimal operation of the compressor. However, compressor manufacturers only provide performance curves under some design conditions, and compressors may often have operating conditions (inlet pressure, inlet temperature) that are not under design conditions in actual operation, and the actual gas composition...

AI Technical Summary

Problems solved by technology

However, compressor manufacturers only provide performance curves under some design conditions, and compressors may often have operating conditions (inlet pressure, inlet temperature) that are not under design conditions in actual operation, and the actual gas composition is also slightly deviated from the design. Using the design performance curve to predict the actual working conditions will have a large deviation, which will easily lead to misjudgments by the staff on the performance of the actual working conditions of the compressor, which is not conducive to the optimal operation of the long-distance natural gas pipeline network

[0003] In addition, through the observation of the historical operation data of the centrifugal compressor, it was found that the performance of the compressor deteriorated over time.

Images