Partial feed-forward decoupling based PI control of CFBB combustion system

Author

Liu Ji-zhen ; Zhong Zhen-fang

Author_Institution

State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China

fYear

2014

fDate

May 31 2014-June 2 2014

Firstpage

1473

Lastpage

1477

Abstract

Circulating fluidized bed boiler (CFBB) develops quickly for a large range of fuels, rapid adjustment to load instruction and low-emissions. But its combustion system is sophisticated with large time-delay and multi-input multi-output coupling together, which make it hard to control. Based on analyzing an existing 2×2 transfer function matrix of the main steam pressure and the bed temperature, a partial feed-forward decoupling method is given to solve the coupling problem. And a new PI controller parameters tuning method is presented for the decoupled loops. Simulation results demonstrate the effectiveness of the decoupling and the control strategy.

Keywords

MIMO systems; PI control; boilers; combustion; delay systems; feedforward; fluidised beds; pressure control; transfer function matrices; CFBB combustion system; PI controller parameters tuning method; bed temperature; circulating fluidized bed boiler; coupling problem; decoupled loops; large time-delay; load instruction; low-emissions; multiinput multioutput coupling; partial feed-forward decoupling method; steam pressure; transfer function matrix; Combustion; Couplings; Simulation; Temperature control; Transfer functions; Tuning; CFBB Combustion System; PI Controller; Parameter Tuning; Partial Feed-forward Decoupling;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (2014 CCDC), The 26th Chinese

Conference_Location

Changsha

Print_ISBN

978-1-4799-3707-3

Type

conf

DOI

10.1109/CCDC.2014.6852399

Filename

6852399