Localization upgrading scheme of PLC control system of compressor set

The control system of DY401-DY403 pipeline compressor set in Yulin Compressor Station is faced with hardware aging, obsolete software, backward algorithm of anti-surge function, and more and more emergency shutdown events resulted from system failure. To solve these problems, a complete localization upgrading scheme was put forward from the aspects of the hardware and software compatibility and the algorithms of anti-surge and load distribution control. It is mainly composed of software and hardware version upgrading, control function optimization and etc. Then, the feasibility and reliability of the control logic were tested and verified by means of the simulation control system consisting of PLC simulator and HMI interface, combined with the station process of UniSim software and the device simulation model machine. The research results can be used as the guide for the localization upgrading of old control systems of pipeline compressor sets in each compressor station in the future.