Application of unattended station functions at night in West-to-East Gas Pipeline

This paper, with considerations to practical operations of West-to-East Gas Pipeline system, describes the function logics required for achieving an unattended station. It edits and revises existing system programs in line with the automatic control system structure of compressor stations in West-to-East Gas Pipeline, adds the failure warning logics of flow computers, logics of pressure and flow-regulating automatic offtake stations to the said system program and proposes measures to reform automatic control system applied to achieve unattended station functions, including PLC logic setup, RCI file revision and station-control VCR and database. Achievements of unattended offtake stations for West-to-East Gas Transmission Pipeline have improved the automatic control level and supervision level, which can ensure the operation safety of the pipeline.