Metodología para modelar y sintonizar lazos de control del proceso, enfocado a minimizar el consumo energético en el recipiente (U_V5) en la Unidad de tratamiento de gas de Petroecuador Esmeraldas.

Abstract

This project presents a methodology to model and tune process control loops, focused on minimizing energy consumption for the container (U_V5) of the gas and fuel treatment unit U of the Public Company Petroecuador, this consists of collecting data of the control system, the temperature, pressure, flow and level are defined as associated in the chemical process of absorption of CO2 and H2S from the absorption tower. The collection of this data allows to find the transfer functions and consequently, to tune the proportional, integral and derivative controllers (PID) that are operating. The tuning method called Approximate Integral Gain Optimization with M Restrictions (AMIGO) is proposed, which allows optimizing resource consumption, to validate the results the proposal is compared with the traditional Ziegler-Nichols method and the stability of the system. The results obtained show that the PID tuning method known as AMIGO manages to reduce energy consumption in all the control loops of the feed section to the amine stripper. Comparing the responses and the control actions generated versus the traditional method (Ziegler-Nichols), always obtaining lower energy consumption and less oscillating responses. In addition, the stability of the proposed tuning method was verified by means of the place of the roots of the compound control system (PID + plant), always obtaining stability for the variables analyzed (temperature, pressure, flow and level), because all the roots are in the negative half plane of the horizontal.