Passivity-based control and stability analysis for hydro-turbine governing systems |
| |
Institution: | Department of Electric Power Engineering, Universidad Tecnológica de Pereira, AA: 97, Pereira 660003, Colombia |
| |
Abstract: | Low-frequency oscillations can occur in hydropower systems under in the new context of power system and the classical controller for hydro-turbine governing systems need to be enhanced with the purpose of improving its stability. We propose a controller based on passivity theory with the aim of damping oscillations in a power system. Passivity-based control arises as a natural choice for hydro-turbine governing system since its open-loop dynamic has a port-Hamiltonian structure, which allows designing a controller that preserves the passive structure in closed-loop via interconnection and damping reassignment. The proposed controller considers the complete non-linear model of the system and guarantees global asymptotic stability in the sense of Lyapunov. Time-domain simulations demonstrate the robustness and proper performance of the proposed methodology under different operative conditions when is compared with the classical controllers. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|