Optimization Of Switched Reluctance Wind Generators' Performance And Efficiency

Now, energy sources consume increasing daily and environment empoison being serious gradually, as renewable, wind power is paid great attention by more and more countries. The technologies also become research hotspot of many countries' scholar.This paper gave the research and experiment on theories, which focuses on optimization of switched reluctance wind generators' performance and efficiency. Firstly This paper summarized the actuality and the foreground of the technologies of wind generation. Presented several advantages of switched reluctance generator used in wind generation, and the significance of developing this system.Secondly paper introduced the operation principle of switched reluctance generator and the structure of its circuit. Paper compared the difference of two excitation modes. The unified analytic expressions of the inductance, phase current, torque and flux linkage are presented based on linear model. The electromechanical energy conversion loop is analyzed deeply and paper introduced three control methods.Thirdly, this paper discusses the calculation of copper loss, iron loss, mechanical loss and stray loss in a switched reluctance generator. Analytical formulas for these loss are given so that the efficiency can be estimated while designing a switched reluctance generator.Fourthly, the fuzzy self-turning PI control of SRG voltage close loop is researched and implemented. Considering the nonlinear characteristic of SRG, the improved design of conventional PI control is presented. The experimental results show that the SRG has acquired good dynamic and static performance by this means.Fifthly, the optimizations of turn-on and turn-off angles of the SRG are researched in this dissertation. In order to obtain the optimal performance in full conditions, based on the optimal control of flux-linkage, a simple controller is proposed that on-line determines the optimal firing angles. Optimal static and dynamic performances are attained through the optimal algorithm.Finally, which the fuzzy self-turning PI control of SRG and turn-on and turn-off angles of the SRG optimize SRG's performance and efficiency is investigated experimentally. A digital controller of the SRG is developed based on DSP and CPLD. The control algorithm of SRG in full conditions operating is realized by assembly language programming. A test rig is developed in order to emulate wind turbine. All these lay a foundation of hardware and software for the SRG in full conditions operating.