Yun LUO, Xuelin CHEN, Ruidong LI, et al. Prediction Model and Application of Turbine Regulating Stage Pressure Under Variable Conditions[J]. Power Generation Technology, 2019, 40(2): 161-167.
Yun LUO, Xuelin CHEN, Ruidong LI, et al. Prediction Model and Application of Turbine Regulating Stage Pressure Under Variable Conditions[J]. Power Generation Technology, 2019, 40(2): 161-167. DOI: 10.12096/j.2096-4528.pgt.18173.
Using the calculation of the variable conditions for steam turbines as the theoretical basis
a multivariate regression model for regulating pressure was established based on the Frugell formula and the Weierstrass approximation theorem. According to the historical operation data of a 660MW generating set
the model was subjected to regression analysis and verification. The results show that the model has a high degree of fit
and the independent variable has a significant influence on the dependent variable; When the steady state conditions are met
the predicted results are consistent with the measured values and the relative error is about 1.2%
which enable soft pressure measurement of the regulation stage. The model was applied to the distributed control system (DCS) of the power plant
and an on-line warning system was established to adjust the pressure anomaly and the partial flow malfunction in the turbine under variable conditions.