Study on SRG for Wind Turbine Generation

开关磁阻电机具有结构简单、坚固耐用、维护方便、成本低、转动惯量小等优点。这些特性对于开关磁阻电机在高速发电机或低速多极发电机等发电机(SRG)中的应用具有重要意义。本研究的目的是阐明开关磁阻发电机的基本运行特性，并考虑开关磁阻发电机在风力发电中的应用。主要研究结果如下：(1)SRG的试建。作者制作了一台200W的开关磁阻发电机样机及其励磁电路。在实验的基础上，阐明了其基本运行特点。开关磁阻发电机的运行特性取决于定子绕组励磁电压的相角和脉宽等励磁条件。(2)提出了一种新的开关磁阻发电机仿真方法。由于开关磁阻发电机的工作特性很大程度上依赖于励磁条件，因此其优化设计是困难的。在本研究中，笔者提出了一种新的计算方法。在计算中，开关磁阻发电机被建模为可变磁阻。通过将可变磁阻、励磁电路、控制电路与合适的电路相结合，可以计算出开关磁阻发电机的动态运行特性。计算结果与实验结果吻合较好。本文提出的仿真方法对开关磁阻发电机的优化设计具有一定的参考价值。(3)开关磁阻发电机在风力发电中的应用。在仿真和简单实验的基础上，研究了开关磁阻发电机在风力发电中的应用。研究结果表明，开关磁阻发电机有望成为一种变速风力发电机组。

A switched reluctance motor (SRM) has simple and strong structure, easiness of maintenance, low cost and small moment of inertia. The features are desirable for the application of SRM to a generator (SRG) such as high speed generator or low speed multipolar generator. The purpose of this research was to clarify fundamental operating characteristic of SRG and to consider the application of SRG to wind turbine generation. The obtained results are as follows:(1) Trial construction of SRG. The author made a 200 W prototype SRG and its exciting circuit. Based on the experiments, the author clarified the fundamental operating characteristics. The operating characteristics of SRG depend on of the exciting conditions such as the phase angle and pulse width of the exciting voltages of the stator windings of SRG(2) Development of a new simulation method of SRG. The optimum design of SRG is difficult because its operating characteristics depend heavily on exciting conditions. In this research, the author proposed a new calculation method. In the calculation, SRG is modeled by a variable reluctance. By combining the variable reluctance, exciting circuit, control circuit with a suitable circuit, we can calculate the dynamic operating characteristics of SRG. The calculated results agree well with the experimental ones. The simulation method presented here is useful for optimum design of SRG.(3) Application of SRG to wind turbine generation. The author examined the application of SRG to wind turbine generation based on the simulation and simple experiments. The obtained results indicate that SRG is expected as a variable speed wind turbine generator.