ON-LINE CALCULATION METHOD FOR THE MAIN STEAM FLOW RATE OF STEAM TURBINE AND ITS APPLICATION

On-line calculation of the main steam flow rate for a steam turbine is one difficult problem in monitoring the performance of thermal power units.The main affecting factors in on-line calculation of the main steam flow rate have been analysed,and the accuracy of existing calculation methods being compared.On the basis of Flugel formula,and combined with practical experiences in operation,a new calculation formula and its corrective method have been put forward,and taking a large-capacity steam turbine as an example for application,the calculation being carried out.Results show that the new calculation formula and its corrective method have higher accuracy,boasting a certain value for application.