Simulation study on the oscillation characteristics of pipeline pressure under the guide vane disturbance

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Zeng, Y.^1 ; Yu, S.G.^2 ; Qian, J.^3 ; Guo, Y.K.^4 ; Wang, Y.L.^1

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming

650093, China^1

Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming

650500, China^2

College of Electric Power Engineering, Kunming University of Science and Technology, Kunming

650500, China^3

School of Engineering, University of Bradford, Bradford

BD7 1DP, United Kingdom^4

关键词: Disturbance frequency;    Disturbance signals;    Nonlinear simulations;    Operation stability;    Optimal control design;    Oscillation amplitude;    Oscillation characteristics;    Pipeline pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012113/pdf
DOI  :  10.1088/1755-1315/163/1/012113

来源: IOP

【 摘 要 】

the oscillation characteristics of pipeline pressure is an important factor affecting the operation stability of hydro turbine generating sets (HTGS), and is also the basis of the optimal control design of the HTGS. A nonlinear simulation model is established based on the Simulink, which is suitable to research the oscillation characteristics of pipeline pressure. The simulation model is verified by using the classic pipeline method of characteristic line (MOC). Simulating the guide blade disturbance signal by the Simulink module, the oscillation characteristics of pipeline pressure is simulated under different disturbance frequencies. The simulation results show that the natural period of the pipeline pressure oscillation is four times of the hydraulic pressure travel time, and the phase of the hydraulic pressure oscillation and the guide vane disturbance is opposite. Under a certain frequency of guide vane, the guide vane disturbance can significantly reduce the oscillation amplitude of pipeline pressure. The simulation method proposed in this paper is simple and practical, and the obtained the oscillation characteristics of pipeline pressure provide a useful reference for the control design of governor.