The Research And Design Of The Small Wind Power Permanent Magnetic Synchronous Generator System

As the economic development in China, the shortage of conventional energy resources and the environmental pollution caused by the use of fossil fuels have become increasingly prominent. In order to achieve sustainable development, the state actively encouraged the development of the renewable energy. With the support of the national industrial policy and the progress in the technical, the installed capacity of wind power will continue to grow. At the same time, the manufacturing costs will go on declining. Wind energy will become an important renewable energy in the national economy and people's lives.However, compared to the other energy sources, there are many negative factors for wind power. For examples, the limit of conversion efficiency can not exceed 59.3% even with the ideal wind turbine; in the natural conditions, the changes of the wind is still very frequent and sometimes severe; the wind turbines need to be installed in the field under harsh conditions and so on. Due to many negative factors, the performance and the reliability of the wind power devices require highly; at the same time, the costs of the corresponding equipments are high. Therefore, the research, which is about improving the efficiency of the energy conversion between the wind energy and the electrical energy and using the expensive equipments fully, become a practical significance topic.This paper mainly studies the control algorithm about the state of wind turbine operation. So that the operation of the wind turbine can adapt to the natural wind change as quickly as possible and the generation can maintain the optimum power in the operation. The aim of the control algorithm also includes the conversion of wind energy as much as possible, high efficiency of the generation power and lower costs. Based on the analysis and comparison, an adaptive power signal feedback control scheme is designed. The program has no wind sensor and judges the state of the system by the speed of the wind turbine. Then base on the algorithm, the speed of the turbine can be adjusted by the power output, so that the operation of the system fast approaches to maximum power point of the system. Thirdly, the algorithm corrects the parameter in the operation, and optimizes the parameter to improve the efficiency of the system. In Matlab/Simulink, the program was modeled and simulated. The results show that the algorithm makes better than the other algorithms which are optimum on the speed and accuracy of the tracking and power output. Because of no wind sensor, so the program also has the advantage of the cost.Based on the algorithm and the simulation, one charge control section of the wind power system was built. The section is controlled by the microcontroller belong to ATMEL' sAVR family and pick the operation of the system by the interruption under different wind conditions. The algorithm was implemented in the real operation. The actual operation of the system shows that the algorithm is reliable and effective, and has the improvement on the speed and accuracy of the tracking and the efficiency of the energy conversion.