Parameter monitoring and control during petrol transportation using PLC based PID controller

摘要

One of the major sources of petroleum products is obtained from the sea (offshore and onshore). Here the major problem faced by the worker is, maintaining the constant pressure and flow till the extreme ends. In this paper, the parameters such as pressure and flow are maintained constantly by implementing control valves depending on the different pressure and flow rate of the transmitting pipe. PLC (Programmable Logical Controller) is used to automatically regulate the flow and pressure during petroleum product transportation by controlling the percentage of opening of the control valves and pumps respectively. The required set point for pressure and flow rate are obtained by implementing a suitable controller that regulates in a long transmitting concrete pipes. For this, a PLC based PID controller is developed and its open loop responses are identified. The simulation studies are carried out in the MATLAB/SIMULINK platform to ensure the performance of the controller. The controller tuning is done by ZN (Ziegler and Nicholas) PID and Simple-IMC (Internal Model Control) PID, Shams tuning IMC-PID controller. The simulation result provides better control action when Shams IMC-PID controller is used. Shams IMC-PID controller is experimentally verified on the lab scale-setup and the results prove that it provides most consistent performance as compared to ZN and Simple-IMC PID controllers.