Author(s): Y Zeng; S G Yu; J Qian; Y K Guo; Y L Wang

Linked Author(s):

Keywords: Pipeline pressure oscillation; Guide vane disturbance; Hydro turbine generating sets; Simulink simulation

Abstract: 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.

DOI: https://doi.org/10.1088/1755-1315/163/1/012113

Year: 2017