Simulation Study of IGCC Gasifier Control Versions

In the light of such dynamic characteristics of Alstom gasifiers as non-linear and multi-variable,two multi-variable control versions based on conventional PID controllers were proposed,which adopted different manipulation variables-controlled variable pairing and for which a corresponding forward feed controller was designed.A simulation test of the versions was perfomed in detail under several operating conditions.The test results show that Version No.1:only under the condition that the coal quantity is properly widened and the limit of the coal feed rate is changed,not only the reference test requirements for Alstom gasifiers can be met but also various control indexes are superior to those of Version No.2.Version No.2:it can strictly meet various reference test requirements,however,the overall dynamic control quality of the system is inferior to that of Version No.1.Different from many complex control algorithms(for example,model prediction-based control),the control versions under discussion are based on conventional PID control,facilitating the accomplishment in engineering projects and offering better guide for industrial applications.