Updating And Retrofitting Capacity Of QFS Type 300MW Turbo-Generator And Its DCS Reconstruction

Based on the 300MW unit of Zouxian power plant, combined with this project's fact, this paper researches the updating and retrofitting capacity of QFS-300-2 type 300MW turbogenerator unit and its DCS reconstruction. This paper introduces the general situation of 300MW QFS type turbogenerator unit and its control system before the reconstruction. This paper analyses the factor which limits generator's capacity and the problems which needed to solve and the ways which can be used in the project. Based on the fully research above, this paper introduces the major measures adopted for updating and retrofitting and describes the distribute control system design scheme in detail. After retrofit, the model test of stator's end winding, temperature rise test of generator at maximum load, leading phase operation test of generator and loss and efficiency test of generator were carried out .Some original problems of QFS type generator, such as higher local temperature of stator's end press ring, incapable of leading phase operation and low efficiency of generator etc. problems were solved. These industrial experiment results shows that the operation of generator was reliable, the capacity was raise from 300MW to 335MW, up 11.67%, both the economics and peaking performance were elevated obviously, the automation and management level of power plant was greatly improved.