Adaptive control for the steam temperature of thermal power plants

Abstract

Excellent control, minimal error from setpoint, of a boiler unit has always been an elusive goal. Adap tive Control System was applied to steam temperature control of utility boilers. In the control system, the adaptive control strategy is embedded on the DCS controllers in parallel with each conventional

Comparative study of regression modeling methods for online coal calorific value prediction from flame radiation features

“…[8][9][10]. Denote the estimate of variable y byŷ, definitions of the mean absolute error, standard deviation of the absolute errors, mean relative error and standard deviation of the relative errors are given in Table 1.…”

“…Although some energy-intrusive techniques, such as tunable diode laser absorption spectroscopy [2,3], laser induced breakdown spectroscopy [4] and X-ray fluorescence analysis [5], have been used to measure some interested parameters including temperature, gas concentration, etc., from attenuation or spectral variation of the penetrated rays in engine design, http://dx.doi.org/10.1016/j.fuel.2014. 10.081 0016-2361/Ó 2014 Elsevier Ltd. All rights reserved. the techniques have limited applications in design and monitoring of large scale industrial boilers due to complicated industrial environments.…”

“…There are scarcely in-situ approaches to directly get detailed knowledge of the combustion inside a boiler, from which automated control could be implemented to optimize the utility operations. In industrial applications, steam pressure, temperature and other parameters that can be conveniently obtained are normally used in the control of energy conversion process [10]. In routine procedure of utility operation adjustment, steam pressure is translated into the heat content of the fuel feed, which is used for the regulation of coal/ air ratios.…”

An Intelligent Supervisory System for the Thermal Process during Severe Disturbance

“…The prior study is the literature [1] which extends a general furnace follow machine method according to the compensator based on state feedback, aimed to reduce the coupling influence among the systems. Paper [2] designs a feedback controller to achieve the in-connected controlling between the steam pressure of the evaporator export and the enthalpy value.Subsequently, the self-adaptive control theory is applied in the steam temperature [3] . In this paper, the control value is the sum of the weighted variables and the weighted variables are self-adaptive control value and the classical control value, and they are exist simultaneity.…”

“…Subsequently, the self-adaptive control theory is applied in the steam temperature [3] . In this paper, the control value is the sum of the weighted variables and the weighted variables are self-adaptive control value and the classical control value, and they are exist simultaneity.…”