Research On Sensorless Control System Of Switched Reluctance Generator

Switched reluctance generator has the advantages of simple structure,low cost,simple and flexible control mode,etc.The application of switched reluctance generator in the field of wind power generation has great potential and can promote the solution of energy and environmental protection problems.It is of great significance to study the control system of switched reluctance generator.Firstly,this thesis introduces the research background of the topic,introduces the commonly used control schemes of switched reluctance generator in detail,and analyzes and compares the advantages and disadvantages of various control schemes and their application scenarios.Various sensorless control schemes of switched reluctance motor are introduced and their advantages and disadvantages are compared and analyzed.Then the motor model of switched reluctance generator and its operation principle are introduced.The derivation process of nonlinear inductance model is described in detail.The ground loss of switched reluctance motor during operation is simply analyzed.Because of the double salient pole structure of switched reluctance generator,the coefficient of nonlinear inductance model changes rapidly with rotor position and phase current.On the basis of this,the inductance model and resistance model of the generator are corrected by introducing the parameter identification technology based on the least square method,and the effectiveness of the parameter identification scheme is proved by simulation.Based on the traditional control scheme,the full-on-chopper control of switched reluctance generator is designed,and the sensorless control of switched reluctance generator is realized.Full on-chopper control is suitable for low and medium speed,and has the function of protecting power devices and equipment.A new position estimation scheme based on super-twisting sliding mode observer is designed,and the simulation results show that the accuracy of the proposed scheme is much higher than that of the traditional sliding mode observer.The experimental platform of switched reluctance power generation system was built,and the control program of power generation operation was designed.The feasibility of the control scheme was further verified by the experiment,and the operating conditions of the wind turbine were simulated to realize the tracking of the maximum wind power of the power generation system.There are 40 figures,4 tables and 73 references in this thesis...