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Optimization-based PID Controller Design with Gain Scheduling for the Drum Boiler Level Control of the Industrial Combine Cycle Plant
Author(s)
Date Issued
January 1, 2021
Type
Conference Paper
Abstract
This work aims to present an application of water level control system for a three-element cascade drum boiler with a PID controller. The PID control value was divided into two control ranges, including peak mode operation during high power consumption and off-peak mode operation during low power consumption for a combined cycle power plant. The feedforward part was the flow rate, while the feedback part was the water level in the drum boiler. Such variables consisted of steam output flow rate, feed water flow rate and water level in the drum boiler. The optimization method was applied for calculating the parameters of the water level controller in the drum boiler. As a result, it was found that the PID controller with divided control phases was able to clearly control the water level of the drum boiler better than a single PID controller. It was able to handle transient and rapid processes very well. For example, shrink and swell effects of water in a drum boiler caused by the fluctuation of the pressure inside the boiler. This method could be used practically for controlling the water level in power plant drum boilers.
Citation
Lecture Notes in Engineering and Computer Science, 2243, 172-177, 2021