Title :
Research on Maintenance Optimization for Steam Turbine Digital Electro-Hydraulic Control System
Author :
Wang, Zhenhe ; Guo, Shaocong
Author_Institution :
Coll. of Sci., Hebei Univ. of Sci. & Technol., Shijiazhuang, China
Abstract :
As the substitute of mechanical hydraulic governing system, steam turbine digital electro-hydraulic control system presents different maintenance characteristics. If the traditional maintenance strategy is still adopted, that is the replacement or inspection time determined just according to overhaul or minimal maintenance standard items, the result is either maintenance cost increasing due to excessive maintenance or reliability decreasing due to deficient maintenance. For the problem, a frame of risk-based maintenance decision of DEH system is put forward, the expression method of failure effect and risk is determined, and the optimal maintenance interval of equipment in system is decided by using fault tree algorithm. Take the DEH system of a certain 300 MW steam turbine as example. It is shown by the instance that this method is feasible and effective, and the decision results can be used as a support for maintenance plan.
Keywords :
decision theory; digital control; electrohydraulic control equipment; fault trees; inspection; maintenance engineering; optimisation; risk analysis; steam turbines; DEH system; fault tree algorithm; inspection time; maintenance optimization; mechanical hydraulic governing system; optimal maintenance interval; replacement time; risk-based maintenance decision; steam turbine digital electro-hydraulic control system; Control systems; Digital control; Educational institutions; Electrohydraulics; Fault trees; Hydraulic turbines; Inspection; Maintenance; Petroleum; Risk management; DEH control system; fault tree; maintenance optimization; risk evaluation;
Conference_Titel :
Intelligent Information Technology Application, 2009. IITA 2009. Third International Symposium on
Conference_Location :
Nanchang
Print_ISBN :
978-0-7695-3859-4
DOI :
10.1109/IITA.2009.49