Simulation of level and pressure control in the dome of a watertube boiler using the Control Station® (LOOP-PRO)
Simulación del control nivel y presión en el domo de una caldera acuotubular usando Control Station® (LOOP-PRO)
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The present work consisted of the simulation of the automatic control in the dome of a water tube boiler, to know in detail the behavior of the level and pressure and its influence on the operation of the boiler. To obtain the dynamics of each of the variables in the dome, the boiler software was used. Different disturbances were performed in manual mode to collect data and later fit them to a dynamic model. With the adjusted functions, a 2x2 MIMO multivariable control strategy was proposed, which was validated with the relative gain criterion proceeding to the decoupling methodology.
The parameters of each controller were tuned by the BLT method for multivariate systems and validated with the Nyquist stability criterion. The 2x2 system was simulated in the Control Station software with the controllers in automatic mode and step-type disturbances were performed to observe the influence that each parameter of the PID controller has on the response time, oscillation and offset of the controlled variables and their reflection on the other variables. With the criteria of overshoot and rise time, each parameter was retuned.
To ensure that the dynamics in the dome remains controlled, disturbances were made for servo control and regulator control, obtaining satisfactory results for each system. PID controllers were shown to respond quickly and efficiently
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