Stabilizer design for ALSTOM gasifier

Gasifier plays a key role in the operation of the whole IGCC power plant. It is a typical multivariable control system with strict constraints on the inputs and outputs which make it very difficult to control. This paper presents a stabilizer design for the ALSTOM gasifier based on the baseline controller proposed for the benchmark challenge problem. The stabilizer adds a simple proportional gain feedback from the fuel gas pressure to the coal flow in the existing control structure, thus is easy to implement and test in practice. Simulation results show that the simple stabilizer can indeed improve the performance of the baseline controller.