Application Research Of On-line Monitoring Steam Turbine On Xuzhou Power Plant Of China Resources

As global warming intensifies and countries around the world strengthen their management of carbon emissions,China has also proposed to reach a carbon peak by2030 and to be carbon neutral by 2060.To achieve this goal,it is necessary to vigorously build clean energy sources such as wind and solar power,a large amount of clean energy will be connected to the power grid,which will have a certain impact on the power grid.The new power system also needs to rely on large-capacity thermal power units to carry out peak regulation.The units will start and stop more frequently,and the operation mode will be more flexible,the control requirements of the steam turbine are also strengthened.Steam Turbine is one of the three major equipment of fossil-fuel power station,its equipment structure is complex,long-term operation in poor working environment,so there will be a high failure rate.Once the fault of the steam turbine occurs,it will cause great loss,so it is very important to monitor the steam turbine on-line.In this paper,the control and protection system of 1000 mw ultra-supercritical steam turbine unit # 5 in Xuzhou Power Plant of China Resources Power Plant is briefly introduced,and the detailed structure and common fault analysis of Steam Turbine Rotor are introduced in detail,the changes of thermal stress and temperature field of steam turbine in cold start and hot start engineering are analyzed,and the basic mathematical model of thermal stress of rotor is established by using related tools,and the temperature field and stress field are analyzed by using the first kind of boundary recurrence algorithm,finish the design of on-line monitoring system.The two-dimensional finite element model of steam turbine rotor is established by using the finite element software ANSYS,and the maximum point of thermal stress is determined by simulation analysis.We can design the on-line monitoring system of thermal stress according to the requirement of the operation field,configure the dialog box,and select to view the alarm record,print the alarm record,analyze the historical data and so on.The monitoring system realizes the on-line monitoring of thermal stress of steam turbine rotor,the optimization of start-up and stop and safe operation of the unit,and effectively prolongs the service life of the unit.This monitoring system realizes on-line monitoring of thermal stress of steam turbine rotor,has the function of historical data storage and analysis.The start-stop optimization and safe operation of the unit are realized,and the service life of the unit is prolonged effectively.There are 48 figures,9 tables and 84 references in this design.