Output Feedback Multivariable Control for an Advanced Boiling Water Reactor

This paper presents a preliminary design of an Output Feedback Multivariable Control for use on an ABWR. Although the design is simple and compact, it meets all the major control requirements for use in load following and frequency regulation in a utility power system. The Multivariable Control coordinates three out of four controls with four measurements and integrals of two of these measurements. The design features dynamic control structure switching with a constant gain matrix; recirculation flow is varied above 70% load demand, while control rods are varied below 70% load demand. This paper describes the 23 state model that was used, the Multivariable Control design, and the nonlinear time domain performance of an ABWR with the Multivariable Control.