水轮机调节系统仿真平台开发与控制策略研究
[Abstract]:Hydraulic turbine regulation system plays an important role in maintaining the stability of power network frequency, and its regulation performance is closely related to the quality of power grid energy. Therefore, it is necessary to model the hydraulic turbine regulation system, simulate the actual situation and optimize the regulation scheme. This paper focuses on the development of simulation platform for hydraulic turbine governing system and the design of fuzzy PID controller. Mathematical models are established for each module of hydraulic turbine governing system, including governor model, hydraulic turbine model, pressure diversion system model and generator model. The simulation-optimization platform of hydraulic turbine governing system is developed and designed based on GUIDE, which realizes the functions of data import, data display, model simulation, parameter optimization, fuzzy control editing and report printing. In order to solve the problem of difficult setting of PID parameters in conventional hydraulic turbine governing system, a hydraulic turbine governing system based on fuzzy PID control is preliminarily studied. Based on the fuzzy rules table of PID parameters, a fuzzy PID controller is designed. The simulation model of hydraulic turbine governing system is established by using Simulink platform, and the frequency disturbance and load rejection are simulated. The control effects of fuzzy PID controller and conventional PID controller are compared and analyzed. The simulation results show that the performance of the fuzzy PID controller is obviously better than that of the conventional PID controller when the frequency is disturbed, but there is no obvious difference in the control effect between the two controllers under the load rejection condition, which indicates that some fuzzy control rules need to be further improved.
【学位授予单位】:华中科技大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TV734.1
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