Performance assessment for life extending control of steam turbine based on polynomial method. (5th September 2016)

• Record Type: Journal Article
• Authors: Sun, Yong-Jian; Wang, Ya-Ling; Li, Meng; Wei, Jun
• Is Part Of: Applied thermal engineering. Volume 108(2016:Sep.)
• Page Start: 1383
• Page End: 1389
• Publication Date: 2016-09-05
• Subjects: Low cycle fatigue -- Steam turbine -- Finite element analysis -- Performance assessment -- Life extending control; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.08.030
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Establish the low cycle fatigue damage model of steam turbine rotor. A performance assessment benchmark feasible in engineering is proposed. A polynomial based assessment method for control performance is developed. Decompose nonlinear LCF damage model to static nonlinear part and dynamic linear part. Abstract: Damage modeling and life extending control for steam turbine are studied in this work. Taking the rolling process of a 300 MW 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.