查询词典 wind turbine

First part: Use a simply wind power system as the discussion and verification of the theory. Study the numerous of factors by flicker emission produced during continuous operation, such as the flicker major source by wind turbine (e.g. wind speed variations, the wind shear and the tower shadow) and grid conditions effect (e.g. short circuit capacity, grid impedance angle). And analyses further that compares SCIG and DFIG , use STATCOM improve SCIG and DFIG is applied to the power system with unstable change load.

第一部分：以一简化风力发电系统作为理论的探讨与验证，研究内容针对风力发电机连续运转下电压闪烁主要来源：风的扰动、风剪切与塔影效应，与来自电力网路的影响：比、短路容量，风力发电电系统中电压闪烁各种因子，并进一步探讨分析 SCIG 与 DFIG 优缺点、以静态同步虚功补偿器改善 SCIG 与 DFIG 运用於不稳定负载电力系统。

In the probabilistic model for wind farm, the uncertainties of wind speed is takes into account, and the real power injected and reactive power absorbed by the wind turbine are described as the function of the voltage magnitude, the slip of the induction machine and the circuit parameters of the wind turbines. In the unified iteration method, the slip of induction machine is introduced as the new correction value. The Newton-Raphson algorithm is used to solve the unified iteration of state variable and slip. Thus, the proposed method retains the quadratic convergence of the Newton-Raphson algorithm.

该风电概率模型考虑风速的随机性，将风机输出的随机有功功率和吸收的随机无功功率描述为电压幅值、异步机的滑差和风轮机的电路参数的函数；联合迭代方法中，异步风力发电机的滑差作为新的修正量被引入，使用牛顿-拉夫逊方法求解关于潮流状态变量和滑差的联合迭代，加热器因而迭代过程保持了牛顿-拉夫逊方法的平方收敛性。

To analyze the aerodynamics performance of a wind turbine blade, the viscous fluid 2-D calculating model is used. The characteristics of a wind turbine, a fluid pump, and a throttle are analyzed.

并在实验与数值计算的基础上，分析了风力机，流体升压泵，节流器的特性，还对联机构成风力致热系统时的性能匹配与变工况特性进行了分析研究。

Therefore, systematic study on the large scale wind turbine gearbox can help reduce the failure rate of the gearbox, improve the performance and reliability of wind turbine.

对大型风电齿轮箱进行系统的研究，降低风电机组中齿轮箱的故障率，提高风电机组的性能和可靠性对推动我国风电产业的发展有重要意义。

Then, it compares the characteristics of many kinds of variable-speed and constant frequency wind turbine and concludes that the direct-driven PMSG wind turbine is the best choice.

接着比较了现存的各类型变速恒频风力发电机的优缺点，进而得出低速永磁同步发电机直接驱动型风力发电机的优越性。

One thing I noticed right away about my property is that most of the time, the wind is blowing. Almost from the moment I bought it, I had the idea of putting up a wind turbine and making some electricity, and later adding some solar panels. This is the story of how I did it. Not with an expensive, store-bought turbine, but with a home-built one that cost hardly anything. If you have some fabricating skills and some electronic know-how, you can build one too.

我注意到一件事情，那就是我所在的地方大部分时间在刮风，几乎是在我买到它时就想树立一台风力发电机来生产一些电，并且在晚一些时候增加一些太阳能电池板，以下就是我的故事，不用商店买来的风力发电机，而是自制的廉价的风力发电机，如果你有一些构造技巧和一些基本的电气知识，你也可以制作一个。

With the introduction of the history and development of wind power all over the world, the factors that influence the development of wind energy are pointed out. Then several advanced packages for wind power analysis are introduced. In Chapter 2, the principle of wind energy generation is analyzed in detail, while the structure of wind turbine systems is modeled, including the wind model, wind wheel model, the power control strategy, the drive model, etc.

本文主要进行了以下几方面的研究工作：本文首先对我国现有的能源储量和结构进行了统计，阐明能源和环境问题的严重性以及发展可再生能源的必要性；结合国内外风力发电的发展现状指出了影响我国风力发电进一步发展的主要因素，并简要了介绍几种适用于风力发电分析的仿真软件。

Analyses characteristics of the wind turbine and ventilation fan for underground engineering, and discusses the matching scheme with a wind turbine as power supply. Verifies the scheme with calculation examples.

通过对风力机和地下工程用通风机特性分析，讨论了利用风力机作为动力源驱动通风机对地下工程进行通风的匹配方法。

The proposed method enormously improved the performance of the model. The proposed model and method should be useful in a wide area of studies, such as short-term wind speed forecasting, wind turbine dynamic simulation, wind generation system control, wind power quality analysis, and other wind engineering or signal analysis.

该文的短期风速仿真方法可以用于短期风速预测、风轮机动态仿真、风力发电控制与电能质量分析等风力发电仿真研究，也可以用于其它风工程、信号分析等领域的仿真研究。

According to the design procedure of wind turbine blades, computing blade parameters based on the vortex theory, a kind of new program design method is offered to display the section and 3D model of wind turbine blades.

按照叶片设计的实际过程，在涡流理论设计叶片参数的基础上，提出了一种能在计算机上立体显示叶片截面及结构的设计方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。