摘要：当化石能源已经变得越来越稀缺的时代来临，风能这种可再生，用之不尽的能源，越来越受到全世界的重视。为了使能源的能够持续的发展，从而保证经济层面的可持续发展和社会层面的可持续发展，有计划的利用常规能源、节约能源、开发新能源和可再生能源是唯一的方法。风能，作为一种可以循环的绿色清洁能源，风力发电技术作为可循环使用的能源中最成熟，也具有很大的开发量和商业发展前景的发电方式，全世界各国也越来越重视。71790

本文首先介绍了风力发电技术的现状。通过风力发电机的特性进行研究，得到了风力极的功率关系。从中得出了功率调节原理，为后续的研究做好了铺垫。

接着，对该课题中最重要的双馈系统进行了深入研究，分析了它的原理。结合风力发电机的原理，得出了风力最大捕获原理。同时，对一个正常的双馈系统，通过电压方程，磁链方程和运动方程，建立起了数学模型。

随后，根据并网的要求，对网侧变流器进行了深入研究，并对其建立了仿真程序。研究它的工作原理，并探寻在并网时如何利用网侧变流器来进行控制，从而保护电网的安全运行。

最后，对整个完整的双馈式风力发电系统，进行仿真，研究风速，电机转速，和无功功率三者之间的关系。同时分析故障时要如何应对，来保护系统。

综上所述，本文对双馈式风力发电系统，进行了一个基础的初步研究。得出的理论结果基正确，并通过仿真验证了本文的研究成果。

毕业论文关键词： 风力发电；双馈系统；并网；网侧变流器；系统仿真

Design simulation of double feed wind power system

Abstract: As fossil fuels have become increasingly scarce, the world has become increasingly concerned about the renewable energy of wind energy. In order to make the sustainable development of energy, so as to guarantee the sustainable development of economy and society sustainable development, systematic use of conventional sources of energy, energy saving, the development of new energy and renewable energy is the only way. Wind power, as a kind of can be recycled green, clean energy, wind power generation technology as the most mature in recycled energy, also has a great potential and commercial development way of generating, the world is becoming more and more attention.

This paper first introduces the present situation of wind power technology. The power relations of wind power are obtained by studying the characteristics of wind turbines. The principle of power adjustment is obtained, which is the basis for future research.

In this paper, the principle of the most important double-feed system was studied. Combined with the principle of wind turbines, the principle of maximum wind capture is obtained. At the same time, the mathematical model was established by the equation of voltage, the equation of magnetic chain and the equation of motion.

Then, according to the requirements of the parallel network, the web side converter was studied and the simulation program was established. To study how it works, and to explore how to use the mesh converter to control the grid when it is connected, thereby protecting the grid's safe operation.

Finally, the relationship between wind speed, motor speed and reactive power is studied for the whole integrated dual-feed wind power system. At the same time, the system should be protected by analyzing the fault.

To sum up, this paper makes a preliminary study on the two-feed wind power system. The results of this paper are verified by simulation.

Keywords: Wind power; Doubly-fed system; Grid; Grid current transformer; System simulation