双馈感应风力发电系统.doc

PAGE PAGE 10 双馈感应风力发电机系统 摘要：随着风力发电中电力电子技术的发展，大容量的变速恒频风力发电系统逐渐成为了风力发电技术的发展方向之一，且技术也逐渐趋于成熟，而采用双馈异步发电机的双馈型的变速恒频风力发电机组是该系统中的主流机型，所以掌握其原理和运行特性具有很重要的意义。对双馈感应风力发电系统的运行原理和特点进行了介绍，并使用MATLAB对系统进行仿真，进而直观地反映并验证其运行特性。 通过MATLAB仿真分析可知，在风速低于额定风速时，通过整流器及逆变器来控制发电机的电磁转矩，实现对风力机的转速控制，通过调节发电机转子转速，尽可能保持最佳叶尖速比以捕获最大风能，同时稳定发电机输出电能的频率，而在此过程中，随着风速的增加，发出的有功功率也在增加；在风速高于额定风速时，通过变浆距系统改变浆叶节距来调节机组的转速，使其保持恒定或在一个允许的范围内变化，从而调节功率使输出功率维持在额定功率。 关键词：风力发电；发电机系统；双馈感应发电机；运行特性仿真分析 DOUBLE-FED INDUCTION GENERATOR SYSTEM Abstract: With the development of the wind power in power electronic technology, the wind power generation systems with the large capacity has gradually become the development direction of wind power technology, and the technology of ripe, but also the doubly-fed induction generator has become the mainstream model of this generator system, so the understand of principle and operation characteristics has important implications. This paper introduced the operating principle and characteristics of doubly-fed induction wind power systems, after that we use of MATLAB simulation system, and then reflected its operating characteristics intuitively. Through MATLAB simulation analysis shows that in the rated wind speed below, the electromagnetic torque to generator is controlled by rectifier and inverter, so that we can realize the control of generator rotor speed, and maintain the best possible maximum wind to capture tip speed, stable the frequency of output power generator, and in the process, with the increase of the wind, the active power are also on the increase; In the rated wind speed and higher slurry system change by variable pitch slurry to adjust the speed of the unit, and keep them in a constant or allow the scope changes, which regulates power output power in power rating. Keywords: wind turbines, power system, Double-fed induction generator, simulation analysis of operating characteristics 0引言 随着风力发电中电力电子技术的发展，大容量的变速恒频风力发电系统逐渐成为了风力发电技术的发展方向之一，且技术也逐渐趋于成熟，而采用双馈异步发电机的双馈型的变速恒频风力发电机组是该系统中的主流机