
Research on the Optimal Sliding Mode Control Strategy of Hydropower Unit under Power Modes
Xu-xin YUE, Guan-xiang ZHANG, Long MA, Ting-yong YANG, Xiao-qiang TAN, Xue-ming JIN, Chao-shun LI
Research on the Optimal Sliding Mode Control Strategy of Hydropower Unit under Power Modes
In order to improve the robustness and dynamic quality of the controller, an optimal sliding mode controller is designed for the optimal control of the hydro-turbine governing system. Firstly, the basic mathematical model of each subsystem of the hydro-turbine governing system is introduced. Based on the system mathematical model, the algebraic equation is locally linearized by using Taylor's expansion formula, and the state space equation of the controlled object of the hydro-turbine governing system is obtained by ignoring the second order and high order infinitesimal. Secondly, the sliding mode controller is designed according to the state space equation and the new sliding mode manifold, and the parameters of the controller are optimized based on the proposed mixed objective function. Finally, the optimal sliding mode control strategy of hydropower plants under power control mode is studied by taking an extra-large hydropower station in China as the experimental object. The robustness of the designed sliding mode controller is verified by experiments of parameter perturbation, disturbance response and noise interference under the weak stability condition of the unit, which lays a theoretical foundation for the practical application of sliding mode control in hydropower units.
hydropower unit / power control mode / sliding mode control / parameter optimization {{custom_keyword}} /
Tab.1 Controller parameters of different comparison methods表1 不同方法的控制器参数 |
对比方法 | 控制器参数 |
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实际PID控制器(PID) | |
由Z-N法整定的PID控制器(ZN-PID) | |
本文提出的改进滑模控制器(AFPSO-SMC) | |
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