Parallel Joint Automatic Operation Technology of Centrifugal Compressors in Offshore Gas Fields
As the main equipment of offshore gas field natural gas transmission,the centrifugal com-pressor in an ultra-deepwater gas field has not realized parallel joint automatic operation control before being put into operation in 2021.When parallel automatic control is adopted for compressors in the ini-tial stage of ultra-deepwater gas fields production,the gas field gas volume fluctuates significantly in a short period of time caused by blockage flow in the riser section of the deepwater gas field.The com-pressors operated in parallel with automatic control often encounter unloading,overloading,and con-flicts with the operation of parallel units,resulting in unqualified exported natural gas products and pro-duction shutdowns.A centrifugal compressor parallel joint automatic operation technology is proposed based on the characteristics of short-term fluctuations in gas volume under the condition of blockage flow in ultra-deepwater gas fields.On the basis of an in-depth analysis of the compressor operation con-trol protection program,the parallel joint automatic operation control of the centrifugal compressor is realized by upgrading the speed control and anti-surge control program,so that the parallel running compressors can be integrated into one,which can effectively improve the parallel stable operation of compressors under short-term gas volume fluctuations.After nearly two years of actual operation,the effectiveness and reliability of this technology have been verified,and the first parallel joint automatic operation of centrifugal compressors in offshore gas fields in China has been realized.
NETL
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