초록 ▼

Present speed and present steam temperature are utilized in accordance with a mathematical model to evaluate present steam to turbine heat transfer and turbine heat propagation quantities, and present turbine rotor and casing surface and volume average temperatures. The model is corrected for inaccu

Present speed and present steam temperature are utilized in accordance with a mathematical model to evaluate present steam to turbine heat transfer and turbine heat propagation quantities, and present turbine rotor and casing surface and volume average temperatures. The model is corrected for inaccuracy based on comparison of calculated rotor to casing differential expansion with measured values, and is exercised once more with anticipated speed and steam temperature quantities to develop anticipated rotor to casing differential expansion and anticipated rotor stress. These quantities are compared with various predetermined limits to determine whether the present and anticipated speed and acceleration are within allowable limits.

대표청구항 ▼

Apparatus for controlling an electric power generating system, said system including a steam turbine adapted to drive an electric generator, comprising: (a) means for sensing present values of a select plurality of operating parameters of said turbine; (b) means, responsive to said present values, f

Apparatus for controlling an electric power generating system, said system including a steam turbine adapted to drive an electric generator, comprising: (a) means for sensing present values of a select plurality of operating parameters of said turbine; (b) means, responsive to said present values, for characterizing present heat transfer conditions between the steam and said turbine; (c) means, responsive to said conditions and to estimates of said select plurality of parameters at at least one predetermined future time, for predicting heat transfer conditions between the steam and said turbine at said future time; and (d) means for presently controlling the speed and acceleration of said turbine as a function of predicted future heat transfer conditions.