Analysis And Optimization Of Control Logic For A Product Oil Pipeline

A product oil pipeline has the characteristics of large undulations,high operating pressure,complicated hydraulic conditions,and high requirements for water hammer control.PID automatic control has obvious advantages over manual control.In this paper,the control logic developed in the pipeline design stage is checked and optimized,which provides reference for the future use of PID automatic control in the field,thus creating a “safe pipeline,green pipeline,smart pipeline”.In this paper,the physical model and control system of the pipeline are established by SPS software.The steady-state analysis of the model shows that it can be used for the simulation of the pipeline.Then based on MATLAB and Simulink,the transfer function of the controlled object is obtained through system identification,and the parameters of the pipeline PID control system are optimized by genetic algorithm and optimization function.The quality of the control is good.Then,with the design flow as the initial steady state,the transient simulation analysis is carried out on the pipeline under different water hammer conditions.The 81 control logics formulated in the design phase are checked,16 of which are unreasonable,and then they are optimized to ensure the safety of pipelines and equipment.Finally,in view of the unexpected power outage accidents of the over-station pump station with relatively high probability of occurrence,based on the priciples of economy and reliability,the new steady-state target state is obtained by using the hydraulic slope down line translation method and the hidden enumeration method,and the optimization scheme is established.The above research content is of great significance to ensure the safe,reliable and economical operation of the pipeline.