Study on the Adaptability of the Model of the Steam Turbine Speed Governing System under the Working Conditions of Deep Peak Regulation

Abstract

At present, power system stability analysis model usually adopt the BPA model, which is provided by the PSD-BPA Transient Stability Program User Manual, and the model parameters are usually obtained from the measured data of 80% or more typical working conditions. With the expansion of load operating interval after retrofitting the flexibility of thermal power units, whether the model parameters can accurately simulate the response changes of the power system under the working conditions of deep peak regulation, that is, the model adaptability under the working conditions of deep peak regulation needs to be further studied. In this paper, the measured data of a 660MW subcritical unit under the working conditions of deep peak regulation was simulated and identified through the model. After the analysis of the simulation results, it was found that the model parameters under the working conditions of deep peak regulation greatly deviated compared with those under typical working conditions, so the model’s adaptability was poor.