Energy-based Nonlinear Control of Wind Power Systems
|Course||Control Science and Engineering|
|Keywords||Wind Power Maximum wind energy capture Doubly-fed induction generator Direct drive permanent magnet synchronous generator Hamiltonian system Energy shaping - damping injection Dissipative Hamiltonian Realization|
With the growing energy crisis and environmental pollution, people start looking for a new clean and green energy to replace conventional energy sources. Currently, in many new forms of energy, wind power as a technology is relatively mature, suitable for large-scale commercial development of clean energy, has been widespread concern. Requirements to meet the wind turbine and grid, increasing unit capacity of wind turbines, the urgent requirements of wind turbines to increase wind energy utilization and system stability. The generator is one of the core components of the wind power generation system, the health of the generator and control system is good or bad quality directly determines the running stability of wind power and energy output. Wind power generation system is a strongly nonlinear systems, and there are uncertain parameters and interference signals. Traditional linear control method based on a point only to ensure that the effect in the vicinity of the working point of control, are unable to meet the requirements of actual wind power system control. Therefore, in recent years, a variety of nonlinear control method gradually began to appear in the wind power system control study. Generalized Hamiltonian system structure clear, clear physical meaning, which describes a class of energy production, dissipation and transmission of dynamic systems. Under certain conditions, the Hamiltonian energy function H (x) is a system Lyapunov function. This makes the Hamiltonian control systems theory have a distinct advantage in the stability analysis and control design of the system, such as the stabilization control, robust control, adaptive control, observer design problem. In recent years, the Hamiltonian system has many applications in power system control. This thesis is controlled Hamiltonian systems theoretical approach to the design of the controller of the wind power generation system, fully consider the nonlinear characteristics of the wind power generation system, a good control effect. This paper first introduces the basics of wind power, including the principle of maximum wind energy capture of wind power generation system, wind power generation technology and control strategies. Secondly, some prior knowledge, including a brief introduction of the basic concepts of nonlinear control theory and the theory of Hamiltonian systems, and gives the two common mathematical model of the wind power generation system. Again study the nonlinear controller design for the double-fed wind power generation system based on energy. Application of energy shaping - damping injection method to design a system's maximum wind energy capture controller: consider the system interference, robust controller design of a double-fed wind power generation system. Finally, to study the direct drive permanent magnet synchronous wind power generation system of nonlinear controller design based on energy. Hamiltonian system theory approach designed maximum wind energy capture of direct drive permanent magnet synchronous wind power generation system controller, adaptive controller, and robust controller. The controller design in this article are the effectiveness of the controller is verified by simulation.