Performance assessment for life extending control of steam turbine based on polynomial method

Abstract

Damage modeling and life extending control for steam turbine are studied in this work. Taking the rolling process of a 300MW steam turbine unit as an example, this paper proposes a control performance benchmark for life extending controller. And a polynomial control performance assessment method is developed. Nonlinear low cycle fatigue damage model is decomposed to static nonlinear part and dynamic linear part. This mathematical model represents a class of damage assessment problems. A numerical simulation using practical industrial data validates the contribution of present work.