Finally, natural wind speed frequency distribution and the extreme wind speed in each section have been got by statistically processing of the routine calculation results.
最后，将编程计算结果进行统计处理，得到各区段的自然风风速频率分布以及风速极值。
The low-frequency instability in variable speed constant frequency doubly fed induction generator(DFIG) widely used in wind power generation is investigated.
研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。
A variable speed constant frequency wind power generation system of doubly-fed induction generator based on converter excitation was described.
建立了基于变换器励磁的双馈感应电机的变速恒频风力发电功率控制系统的模型。
By using the frequency and speed modulation technology, the electricity consumed will vary with the amount of the wind, thus a remarkable energy-saving result is achieved.
变频调速技术通过改变电动机工作电源频率调节电机转速，消耗的电能随风量大小而变，具有显著的节能效果。
The decoupled control of active power and reactive power is a key technology of variable speed constant frequency (VSCF) wind energy generation system.
双馈发电机的有功和无功功率的解耦控制是变速恒频（VSCF）风力发电系统的关键技术。
But Steady low fan speed change, so that airflow and vibration according to a fixed frequency, so we might as natural wind moderate.
但稳定低风扇速度变化，使气流和振动按固定频率，因此我们可能是自然风温和。
The disturbance of wind mainly means the variety of speed and frequency of wind, and it's affected by forest density and the distribution of wind field under complex landform.
风的扰动主要包括风速、频率等的变化，并受不同林木密度和复杂地形下的风场分布的影响。
In recent years, the variable speed constant frequency wind generator system is the most widely question for discussion at home and abroad, especially for doubly-fed induction.
变速恒频风力发电系统是近年来国内外研究最广泛的课题，其中最具代表性的是绕线式转子双馈异步发电系统。
Two kinds of wind power generation systems are introduced as well as the frequency control, power control and rotational speed control of generator in parallel operation.
介绍了风力发电系统的两种形式和并网运行的频率控制、功率控制、发电机转速控制。
Variable-speed variable-frequency(VSVF), a new typed operational mode for the induction generator based wind power generation system is proposed based on the fractional frequency power transmission.
在分析异步风力发电系统模型的基础上，结合分频输电技术，提出了一种新型的异步风力发电系统运行方式——变速变频（VSVF）方式。
Results also show that decrease of pressure gradient in winter and spring influences dust weather frequency by affecting wind speed indirectly.
冬春季节气压梯度的减小是风速减小、进而导致沙尘日数减小的关键间接因素。
This article is about the research of space control in the variable speed constant frequency wind energy conversion system.
本文主要研究了变速恒频双馈风力发电系统中的矢量控制。
The design and manufacture for MW-class AC-excited doubly-fed generator is very important in the variable speed constant frequency doubly-fed wind power system.
在变速恒频双馈风电机组中，交流励磁双馈风力发电机的设计和制造技术是十分关键的。
The wind speed which can cause the bar resonant vibration has a strong relation with the self-vibration frequency of the bar.
其共振风速和杆件自身的自振频率有很大关系。
This paper introduces the control method for the Wind Turbine Units of constant speed constant frequency and variable speed constant frequency.
文章介绍了恒速恒频及变速恒频并网型风力发电机组的控制方法。
Control winding frequency of a certain time, while the generator speed in the wind under the process of change.
控制绕组的频率一定时，而发电机的转速在风速下的变化过程。
MW variable speed constant frequency wind turbine from shenyang university of technology is a variable pitch wind turbine, it can change pitch to adjust power above rated wind speed.
由沈阳工业大学研制的MW级变速恒频风电机组属于变桨距型机组，它在额定风速以上进行变桨距调功控制。
Standardized the wind speed by Rayleigh frequency distribution, a concept named equivalent wind speed was presented;
利用风速频率瑞利分布对平均风速进行均一化，提出相当风速的概念；
Therefore, it is necessary to study the frequency control strategy of the variable speed wind turbines, use variable speed wind turbines to improve the frequency control ability of the power system.
因此，有必要研究变速风电机组的频率控制策略，利用变速风电机组来提高电力系统的频率控制能力。
Meteorological records in the past 50 years indicate that there has been a sharp decrease in sand dust storm frequency, which is in accordance with the decrease in annual mean wind speed.
近50年来多个站点的观测记录表明了沙尘暴的发生频率处于快速下降的过程，这恰好与年均风速的变化趋势较为一致。
The variable-speed constant-frequency generation BDFM wind power generation power control mathematic model is firstly derived, and its power control strategy is found.
首次推导了适用于变速恒频风力发电无刷双馈电机的功率控制数学模型提出无刷双馈电机变速恒频风力发电系统的功率控制策略。
Twin stator brushless doubly fed machine generation system which has no electrical brush and can running in variable speed and constant frequency condition is very suitable for wind power generation.
双定子无刷双馈发电机具有无刷化和可进行变速恒频发电的特点，非常适合于风力发电系统，对其发电系统的研究，将使这种新型电机能够尽快地应用于实际之中。
With the rate of the variable speed wind turbines connected to the grid increasing, it will bring adverse influence on frequency control of the power system.
随着变速风电机组容量在电网中的所占比例的不断提高，其接入电网将给电力系统的频率控制带来不利影响。
Finally this article analyzed the mathematical model of wind turbine, compared to the current different types of variable speed constant frequency wind power systems.
最后分析了风力机的数学模型，对比了目前采用的不同类型的变速恒频风力发电系统。
Wind power generation system should adopt the variable speed constant frequency (VSCF) control strategy in order to maximize the use of wind energy.
为了最大限度地利用风能，风力发电系统应采用变速恒频控制策略。
From point of view of electric-energy control, AC excited generation system for wind-energy with variable-speed and constant-frequency includes AC excited generator, AC exciter and the control system.
交流励磁变速恒频风力发电系统从电能控制的角度来看，它包括交流励磁发电机、交流励磁器和发电控制系统。
The variable speed constant frequency double-fed wind power system is taken as the research object and the control problem of maximum wind energy tracing below the rated wind speed is studied.
以变速恒频双馈风力发电系统为研究对象，研究了额定风速以下风能的最大追踪控制问题。
To improve the efficiency of wind power utilization, we employ more and more variable-pitch controllers and variable-speed constant-frequency (VSCF) controllers in wind-power generating systems.
风力发电系统为了更充分更有效的利用风能，越来越多的采用变桨控制系统和变速恒频控制系统。
To improve the efficiency of wind power utilization, we employ more and more variable-pitch controllers and variable-speed constant-frequency (VSCF) controllers in wind-power generating systems.
风力发电系统为了更充分更有效的利用风能，越来越多的采用变桨控制系统和变速恒频控制系统。
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