On-line determination method and equipment for specific enthalpy and dryness of working medium of nuclear power saturated steam turbine

The invention provides a nuclear power saturated steam turbine working medium specific enthalpy and dryness online determination method and device. The method comprises the steps that S1, relevant parameters and operation data of a saturated steam turbine are obtained; s2, determining the dry basis internal efficiency and the dehumidification efficiency of each stage group in the steam turbine; s3, determining isentropic enthalpy drop of the working media at the inlet and the outlet of the stage group; s4, calculating the internal efficiency of the stage group under the current working condition, the effective enthalpy drop of the inlet and outlet working media and the specific enthalpy and dryness of the stage group outlet working media; s5, determining the stage intra-group efficiency of the current working condition; s6, the steps S4 to S5 are repeated, calculation is terminated when the difference of the stage group outlet working medium specific enthalpies obtained through two adjacent times of calculati