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Proportional-Integral-Plus (PIP) control of the GEC Alsthom Gasifier benchmark challenge.

Research output: Contribution to conferenceConference paper

Published

Publication date1998
Original languageEnglish

Conference

ConferenceMEC Benchmark Challenge on Gasifier Control
CityCoventry University, UK
Period24/06/98 → …

Abstract

Although it is able to exploit the full power of optimal state variable feedback within a Non-Minimum State Space (NMSS) setting, the Proportional-Integral-Plus (PIP) controller is simple to implement and provides a logical extension of conventional PI/PID controllers, with additional dynamic feedback and input compensators introduced automatically by the NMSS formulation of the problem when the process is of greater than first order or has appreciable pure time delays. The present paper applies the basic PIP methodology to the GEC Alsthom benchmark challenge, which takes the form of a highly coupled, multivariable linear model, representing the gasifier system of an Integrated Gasification Combined Cycle (IGCC) power plant. In particular, a straightforwardly tuned, discrete-time PIP control system based on a reduced order, backward shift model of the gasifier, is found to yield good control of the benchmark, meeting all of the specified performance requirements at three different operating points, except for just one variable in the most difficult 0% load case. Research is continuing on alternative delta operator and continuous-time designs, which may have some advantages in this example where the system has a mixture of quick and very slow dynamic modes.