Modelación, programación y simulación del control automático mediante PLC para sistemas industriales : modelación, programación y simulación del control automático mediante PLC de un caldero pirotubular de vapor saturado con una potencia de 150 BHP.

Abstract

This case study addresses the automatic control in a firetube boiler, in the first instance a documentary synthesis is addressed about the relevant topics for the development of present project, within which are the elements of computer simulation, automatic control of thermal systems and the operation of firetube boilers and the relevant elements to control the process of the plant, After the bibliographic review, the mathematical model is developed, which is made from thermodynamic systems according to the type of system that corresponds, with the models the open loop and feedback control is used to determine the temperature curves with respect to the time that will be useful for the simulation of the plant. Consequently, the variables directly involved in the control of the boiler such as temperature and pressure are analyzed, the curves obtained in the open and closed loop are used to determine the maximum and minimum temperatures of the process and the time it takes to perform each action and thus simulate the plant in a real way. The programming of the programmable logic controller (PLC) integrates all the control parameters previously established; this programming is done in the free software STEP7 MicroWin which allows us to program a PLC in the Ladder programming language and simulate it in the complementary program PCSIMU. Finally, the simulation is executed where the results of the firetube boiler can be seen.