Mathematical Modelling and Simulation of Non-Linear PID Controller for Spherical Tank Level Control in oil and Gas Industry
Boobalan S1, Lakshmi K2, Gobhi Nath S3

1Boobalan S, Department of Electrical and Electronics Engineering, Sri Krishna College of Engineering and Technology, Coimbatore (Tamil Nadu), India.
2Dr Lakshmi K, Department of Electrical and Electronics Engineering, Sri Krishna College of Engineering and Technology, Coimbatore (Tamil Nadu), India.
3Gobhi Nath, Department of Electrical and Electronics Engineering, Sri Krishna College of Engineering and Technology, Coimbatore (Tamil Nadu), India.

Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 1389-1394 | Volume-8 Issue-7, May 2019 | Retrieval Number: G5340058719/19©BEIESP
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In process industry specifically in oil and Gas industries, Spherical tank is preferred for storage of high-pressure fluids because of its strong structure and its even distribution of stresses on the sphere’s surfaces, both internally and externally. Geometrically speaking its structure naturally highly nonlinear in nature. In oil and gas industries, every operation is done by the automation with the help of field sensors, controllers and final control elements (Actuators). Controlling any process variable is commonly difficult in oil and gas process industries. The level control of spherical tank is highly difficult job because of its geometrical structure. The area of the spherical tank is continuously varying with respect to its height. So, it required a special type of controllers needs to control it. This article presents the controller tuning methods of PID controller to control the level of Spherical Tank Control system.
Keyword: Spherical Tank, Level Control, Process Automation, Non-linear System, PID Controller, ZN Controller.
Scope of the Article: Software Analysis, Design and Modelling.